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• ISC DHCP - Force clients to get a new IP address, instead of the being re-issued their previous lease's IP

  - by kce

  We are in the middle of a migration of our DHCP and DNS services from a Debian-based server to a Windows Server 2008 R2 implementation. The Debian server is running isc-dhcpd-V3.1.1. All of workstations are configured to have fixed-addresses between .3 and .40 (the motivation behind that choice is mostly management/political much like here). DHCP leases are given out in the range of .100 to .175. Statically configured servers live in the .200 block and above (which is mostly empty). When we move to the Windows platform, management/political considerations require me to move the IP ranges around again. We would like to keep .1 - .10 reserved for network appliances, switches, and other infrastructure. .200 will remain designated for servers. The addressing space in between should be available to clients and IPs should be dynamically allocated (Edit: instead of automatic as originally mentioned) by the server. My Address Pool on the Windows Server looks like this: 192.168.0.1 192.168.0.254 (Address range for distribution) 192.168.0.1 192.168.0.10 (IP addresses excluded from distribution) 192.168.0.200 192.168.0.254 (IP addresses excluded from distribution) Currently, we have all of our clients still on the .3 - .40 range, and a few machines still active in the .100 - .175 (although there are lots devices that are powered off that still have expired leases with IPs from that range). Since the lease "database" isn't shared between the old and new DHCP server how can I prevent clients from receiving a lease with an IP address that is currently being held by client with a non-expired lease from the old DHCP server? If I just expand the range on the Debian DHCP server to be 192.168.0.10 - 192.168.0.199 is there a way to force clients to not re-use their old IP address when they send their DHCPDISCOVER? Can I make the Windows DHCP server be authoritiative like the ISC implementation? The dhcpd.conf from the Debian server: ddns-update-style none; authoritative; default-lease-time 43200; #12 hours max-lease-time 86400; #24 hours subnet 192.168.0.0 netmask 255.255.255.0 { option routers 192.168.0.1; option subnet-mask 255.255.255.0; option broadcast-address 192.168.0.255; range 192.168.0.100 192.168.0.175; } host workstation-1 { hardware ethernet 00:11:22:33:44:55; fixed-address 192.168.0.3; } ... and so on until 192.168.0.40

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• iptables management tools for large scale environment

  - by womble

  The environment I'm operating in is a large-scale web hosting operation (several hundred servers under management, almost-all-public addressing, etc -- so anything that talks about managing ADSL links is unlikely to work well), and we're looking for something that will be comfortable managing both the core ruleset (around 12,000 entries in iptables at current count) plus the host-based rulesets we manage for customers. Our core router ruleset changes a few times a day, and the host-based rulesets would change maybe 50 times a month (across all the servers, so maybe one change per five servers per month). We're currently using filtergen (which is balls in general, and super-balls at our scale of operation), and I've used shorewall in the past at other jobs (which would be preferable to filtergen, but I figure there's got to be something out there that's better than that). The "musts" we've come up with for any replacement system are: Must generate a ruleset fairly quickly (a filtergen run on our ruleset takes 15-20 minutes; this is just insane) -- this is related to the next point: Must generate an iptables-restore style file and load that in one hit, not call iptables for every rule insert Must not take down the firewall for an extended period while the ruleset reloads (again, this is a consequence of the above point) Must support IPv6 (we aren't deploying anything new that isn't IPv6 compatible) Must be DFSG-free Must use plain-text configuration files (as we run everything through revision control, and using standard Unix text-manipulation tools are our SOP) Must support both RedHat and Debian (packaged preferred, but at the very least mustn't be overtly hostile to either distro's standards) Must support the ability to run arbitrary iptables commands to support features that aren't part of the system's "native language" Anything that doesn't meet all these criteria will not be considered. The following are our "nice to haves": Should support config file "fragments" (that is, you can drop a pile of files in a directory and say to the firewall "include everything in this directory in the ruleset"; we use configuration management extensively and would like to use this feature to provide service-specific rules automatically) Should support raw tables Should allow you to specify particular ICMP in both incoming packets and REJECT rules Should gracefully support hostnames that resolve to more than one IP address (we've been caught by this one a few times with filtergen; it's a rather royal pain in the butt) The more optional/weird iptables features that the tool supports (either natively or via existing or easily-writable plugins) the better. We use strange features of iptables now and then, and the more of those that "just work", the better for everyone.

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• Can't get DHCPd to assign IPs to unknown clients

  - by Jakobud

  I'm using Webmin to admin our DHCPd server. But I'm having a hard time getting it to assign IP addresses to unknown clients. The only way I can get it to assign an IP is to make sure a host is added to DHCPd as a host so that it gets a static-lease IP assigned to it. I thought "Allow Unknown Clients" was the key, but it still isn't assigning IPs to unknown clients. I have a pool setup so that the unknown clients should get an IP between 10.20.0.200 - 10.20.0.249. Here is the config file. What am I missing here? allow unknown-clients; # Primary DHCP server config authoritative; ddns-update-style none; failover peer "dhcp-failover" { primary; address 10.20.0.30; port 647; peer address 10.20.0.25; peer port 647; max-response-delay 60; max-unacked-updates 10; load balance max seconds 3; mclt 3600; split 128; } subnet 10.20.0.0 netmask 255.255.255.0 { allow unknown-clients; option subnet-mask 255.255.255.0; option broadcast-address 10.20.0.255; option routers 10.20.0.100; option domain-name "ourdomain.com"; option domain-name-servers 192.168.10.20; default-lease-time 86400; max-lease-time 86400; option ntp-servers 192.168.10.20; option time-offset -25200; pool { allow unknown-clients; failover peer "dhcp-failover"; max-lease-time 86400; range 10.20.0.200 10.20.0.249; deny dynamic bootp clients; } host Server-myserver { option host-name "whatever.ourdomain.com"; hardware ethernet 00:89:D4:35:4F:13; fixed-address 10.20.0.23; } }

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• Missing startup screens and slow bootup/login after using WinClone to expand Bootcamp partition

  - by user26453

  I used WinClone to backup my Bootcamp partition, which was a Windows 7 Ultimate install, on my late 2006 Macbook Pro. I desired to expand the Bootcamp partition's size. It worked reasonably well with some hiccups along the way and some remaining issues. First issue I ran into was the Bootcamp Assistant utility - it would not recreate the partition. This was due to a lack of contiguous space that is required for the Bootcamp partition. As a result I wiped the whole drive and reinstalled Snow Leopard, did the minimum amount of system updates, and created and formated a new Bootcamp partition. WinClone restored the image without complaint and the image was automatically resized to the new partition's size. Second issue I ran into was after the first boot into Windows. The first thing I noticed was that instead of the newer "slick" startup screen (4 colors wisping around, a Windows 7 title), there was more of an old school style startup screen (a progress bar with block increments, yellow/greenish color, nothing else really). The initial bootup to a login screen was slow, perhaps as Windows dealt with the partition changes. After logging in, the screen goes blank and the computer seems to hang for a minute, before completing the login. After subsequent restarts, the slick screen is still missing, boot to login screen is normal, but the time from login to desktop active is still very slow. As a side note, this behavior of a long time from login to the desktop finally loaded I've previously only seen when the computer would try to hibernate and fail (battery is really bad). On the next startup, I would see this behavior, but not subsequently. So a potential cause: I imaged the partition after hibernating out of Windows. From reading some posts/guides on the subject, this was not recommended, and perhaps shouldn't even have worked? Could the partition be stuck in some weird mode as a result that makes the boot issues appear? I've attempted to disable hibernation and restart, trying to delete the .sys file that hibernation uses. Other fixes I'm thinking of attempting are booting a Win7 disc and repairing the install/partition. I can't shake the nagging feeling something isn't right as a result of the modified boot screens and the slow login process.

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• How to get physical partition name from iSCSI details on Windows?

  - by Barry Kelly

  I've got a piece of software that needs the name of a partition in \Device\Harddisk2\Partition1 style, as shown e.g. in WinObj. I want to get this partition name from details of the iSCSI connection that underlies the partition. The trouble is that disk order is not fixed - depending on what devices are connected and initialized in what order, it can move around. So suppose I have the portal name (DNS of the iSCSI target), target IQN, etc. I'd like to somehow discover which volumes in the system relate to it, in an automated fashion. I can write some PowerShell WMI queries that get somewhat close to the desired info: PS> get-wmiobject -class Win32_DiskPartition NumberOfBlocks : 204800 BootPartition : True Name : Disk #0, Partition #0 PrimaryPartition : True Size : 104857600 Index : 0 ... From the Name here, I think I can fabricate the corresponding name by adding 1 to the partition number: \Device\Harddisk0\Partition1 - Partition0 appears to be a fake partition mapping to the whole disk. But the above doesn't have enough information to map to the underlying physical device, unless I take a guess based on exact size matching. I can get some info on SCSI devices, but it's not helpful in joining things up (iSCSI target is Nexenta/Solaris COMSTAR): PS> get-wmiobject -class Win32_SCSIControllerDevice __GENUS : 2 __CLASS : Win32_SCSIControllerDevice ... Antecedent : \\COBRA\root\cimv2:Win32_SCSIController.DeviceID="ROOT\\ISCSIPRT\\0000" Dependent : \\COBRA\root\cimv2:Win32_PnPEntity.DeviceID="SCSI\\DISK&VEN_NEXENTA&PROD_COMSTAR... Similarly, I can run queries like these: PS> get-wmiobject -namespace ROOT\WMI -class MSiSCSIInitiator_TargetClass PS> get-wmiobject -namespace ROOT\WMI -class MSiSCSIInitiator_PersistentDevices These guys return information relating to my iSCSI target name and the GUID volume name respectively (a volume name like \\?\Volume{guid-goes-here}), but the GUID volume name is no good to me, and there doesn't appear to be a reliable correspondence between the target name and the volume that I can join on. I simply can't find an easy way of getting from an IQN (e.g. iqn.1992-01.com.example:storage:diskarrays-sn-a8675309) to physical partitions mapped from that target. The way I do it by hand? I start Disk Management, and look for a partition of the correct size, verify that its driver says NEXENTA COMSTAR, and look at the disk number. But even this is unreliable if I have multiple iSCSI volumes of the exact same size. Any suggestions?

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• Pxe net install Centos with Static IP

  - by Stu2000

  I seem to be unable to perform a kickstart installation of centos5.8 with a netinstall. It correctly gets into the text installer, but keeps sending out a request for the dhcp server and failing. I have tried to manually set the IP everywhere. Here is my pxelinux.cfg file DEFAULT menu PROMPT 0 MENU TITLE Ubuntu MAAS TIMEOUT 200 TOTALTIMEOUT 6000 ONTIMEOUT local LABEL centos5.8-net kernel /images/centos5.8-net/vmlinuz MENU LABEL centos5.8-net append initrd=/images/centos5.8-net/initrd.img ip=192.168.1.163 netmask=255.255.255.0 hostname=client101 gateway=192.168.1.1 ksdevice=eth0 dns=8.8.8.8 ks=http://192.168.1.125/cblr/svc/op/ks/profile/centos5.8-net MENU end and here is my kickstart file: # Kickstart file for a very basic Centos 5.8 system # Assigns the server ip: 192.211.48.163 # DNS 8.8.8.8, 8.8.4.4 # London TZ install url --url http://mirror.centos.org/centos-5/5.8/os/i386 lang en_US.UTF-8 keyboard us network --device=eth0 --bootproto=static --ip=192.168.1.163 --netmask=255.255.255.0 --gateway=192.168.1.1 --nameserver=8.8.8.8,8.8.4.4 --hostname=client1-server --onboot=on rootpw --iscrypted $1$Snrd2bB6$CuD/07AX2r/lHgVTPZyAz/ firewall --enabled --port=22:tcp authconfig --enableshadow --enablemd5 selinux --enforcing timezone --utc Europe/London bootloader --location=mbr --driveorder=xvda --append="console=xvc0" # The following is the partition information you requested # Note that any partitions you deleted are not expressed # here so unless you clear all partitions first, this is # not guaranteed to work part /boot --fstype ext3 --size=100 --ondisk=xvda part pv.2 --size=0 --grow --ondisk=xvda volgroup VolGroup00 --pesize=32768 pv.2 logvol swap --fstype swap --name=LogVol01 --vgname=VolGroup00 --size=528 --grow --maxsize=1056 logvol / --fstype ext3 --name=LogVol00 --vgname=VolGroup00 --size=1024 --grow %packages @base @core @dialup @editors @text-internet keyutils iscsi-initiator-utils trousers bridge-utils fipscheck device-mapper-multipath sgpio emacs Here is my dhcp file: ddns-update-style interim; allow booting; allow bootp; ignore client-updates; set vendorclass = option vendor-class-identifier; subnet 192.168.1.0 netmask 255.255.255.0 { host tower { hardware ethernet 50:E5:49:18:D5:C6; fixed-address 192.168.1.163; option routers 192.168.1.1; option domain-name-servers 8.8.8.8,8.8.4.4; option subnet-mask 255.255.255.0; filename "/pxelinux.0"; default-lease-time 21600; max-lease-time 43200; next-server 192.168.1.125; } } Is it impossible to prevent it asking for a dynamic ip before trying to install from the net? Perhaps there is an error in of my files? My dhcp server is set to ignore client-updates, and is set to only works with one mac address whilst testing.

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• Why doesn't video run smoothly on my laptop anymore?

  - by andygrunt

  This might be an impossible question to answer remotely but I figure there may be some common causes that people can suggest so I think it's worth asking... Video no longer plays smoothly on my laptop. It used to but not for a while now. For example, playing a video on YouTube is pretty typical: I press play (making sure it's not on HD or even HQ) and the video buffers a little then starts to play. At first it plays fine then the video starts to stutter, turning into a slideshow while the sound continues to play smoothly. If I try playing the same video on my Playstation 3 (which is linked to the same network) it plays smoothly so it can't be the connection. Another example is streaming DivX videos. Again, I wait while it buffers and it starts but very soon, instead of a slideshow, this time the video just plays slowly while the sound continues as normal (instantly getting out of sync). Even if I let the video fully load before pressing play (i.e. it's no longer streaming), it still behaves the same way. I can even let it load 100% then save the file to hard disk and use VLC player to view it, and the same thing happens. I'm using an old laptop running Windows XP. For the past several years it's been connected to the router via Wi-Fi but in the past few days I've changed that to a network cable (like my PS3) but that hasn't helped. Yes, I regularly install various bits and pieces of software but nothing that I can identify as being the cause. So, are there known causes of this sort of behaviour and if so, what can I do to fix it? Thanks. Update to answer a few questions... Laptop Spec' (note: video has played back fine for the majority of time I've had the laptop) Toshiba Satellite 1900-603 (possibly called something else outside the UK) Intel Pentium 4 2.2 Ghz Processor Originally had 512Mb memory but recently doubled that to 1 Gig of memory Graphics: ATI Mobility Radeon 16Mb DDR VRAM Windows XP SP3 (Home edition) Over the years I've done several things to speed it up (disabling indexing etc) and am generally happy with the performance. I also regularly have a clear out of old software (if for no other reason than the laptop only has a 40Gb hard disk) and use CCleaner and Glary Utilities to strip out much of the crap from my system. Also recently (after doubling the memory), I've tried a few new things which might be likely candidates for slowing the video down such as Rocketdock, Jingle keyboard (which gives an old style 'clacky' typewriter sound when I type - love it), SugarSync, Taskbar Shuffle. However, the video doesn't play smoothly even when I try quit all these apps.

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• Google Chrome and Firefox Rendering

  - by user13503

  When attempting to visit sites running javascript, Google Chrome and Firefox often fail to render them properly. For example, when hitting google.com/codesearch results, I just get a blank page. http://img340.imageshack.us/img340/8527/200910071518.png This rendering problem happens in both browsers on a machine running Windows XP Professional x64. Internet explorer is able to render the page just fine. Also, controls on other pages sometimes fail to respond, for example in Google Docs. Has anyone encountered this issue before in Chrome/Firefox? Do they share a common installation of the V8 javascript engine? I'm baffled by this issue. Here's the source code for the image above that Chrome loads when attempting to retrieve the page: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><script>function a(c){this.t={};this.tick=function(d,e,b){var f=b?b:(new Date).getTime();this.t[d]=[f,e]};this.tick("start",null,c)}var g=new a;window.jstiming={Timer:a,load:g};try{window.jstiming.pt=window.external.pageT}catch(h){}; </script><title></title><script language="javascript" src="/codesearch/js/CachedFile/F1A2CB189D0FCB1FF201C42BF6A5447C.cache.js"></script></head><body><iframe src="javascript:''" id="__gwt_historyFrame" style="width:0;height:0;border:0"></iframe><script>if(window.jstiming){window.jstiming.a={};window.jstiming.c=1;function k(a,d,f){var b=a.t[d];if(!b)return undefined;b=a.t[d][0];if(f!=undefined)var h=f;else h=a.t.start[0];return b-h}window.jstiming.report=function(a,d,f){var b="";if(window.jstiming.pt){b+="&srt="+window.jstiming.pt;delete window.jstiming.pt}try{if(window.external&&window.external.tran)b+="&tran="+window.external.tran}catch(h){}if(a.b)b+="&"+a.b;var e=a.t,p=e.start,l=[],i=[];for(var c in e)if(!(c=="start"))if(!(c.indexOf("_")==0)){var j= e[c][1];if(j)e[j]&&i.push(c+"."+k(a,c,e[j][0]));else p&&l.push(c+"."+k(a,c))}delete e.start;if(d)for(var m in d)b+="&"+m+"="+d[m];var n=[f?f:"http://csi.gstatic.com/csi","?v=3","&s="+(window.jstiming.sn?window.jstiming.sn:"codesearch")+"&action=",a.name,i.length?"&it="+i.join(",")+b:b,"&rt=",l.join(",")].join(""),g=new Image,o=window.jstiming.c++;window.jstiming.a[o]=g;g.onload=g.onerror=function(){delete window.jstiming.a[o]};g.src=n;g=null;return n}}; </script></body></html> Thanks, Steve

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• Ubuntu 11.10 firewall/gateway - no client internet access

  - by Siriss

  I have read many other posts but cannot figure this out. eth0 is my external connected to a Comcast modem. The server has internet access with no issues. eth1 is internal and running DHCP for the clients. I have DHCP working just fine, all my clients can get an IP and ping the server but they cannot access the internet. I am using ISC-DHCP-SERVER and have set /etc/default/isc-dhcp-server to INTERFACE="eht1" Here is my dhcpd.conf file located in /etc/dhcp/dhcpd.conf ddns-update-style interim; ignore client-updates; subnet 10.0.10.0 netmask 255.255.255.0 { range 10.0.10.10 10.0.10.200; option routers 10.0.10.2; option subnet-mask 255.255.255.0; option domain-name-servers 208.67.222.222, 208.67.220.220; #OpenDNS # option domain-name "example.com"; default-lease-time 21600; max-lease-time 43200; authoritative; } I have made the *net.ipv4.ip_forward=1* change in /etc/sysctl.conf here is my interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp iface eth1 inet static address 10.0.10.2 netmask 255.255.255.0 network 10.0.10.0 auto eth1 And finally- here is my iptables.conf file: # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *nat :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -s 10.0.10.0/24 -o eth0 -j MASQUERADE #-A PREROUTING -i eth0 -p tcp --dport 59668 -j DNAT --to-destination 10.0.10.2:59668 COMMIT *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i eth1 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT -A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT -A FORWARD -s 10.0.10.0/24 -o eth0 -j ACCEPT -A FORWARD -d 10.0.10.0/24 -m state --state ESTABLISHED,RELATED -i eth0 -j ACCEPT -A FORWARD -p icmp -j ACCEPT -A FORWARD -i lo -j ACCEPT -A FORWARD -i eth1 -j ACCEPT #-A FORWARD -i eth0 -m state --state NEW -m tcp -p tcp -d 10.0.10.2 --dport 59668 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT I am completely stuck. I cannot figure out why the clients cannot access the internet. Am I missing a service? Is a service not running? Any help would be greatly appreciated. I tried to be as thorough as possible but please let me know if I have missed something. Thank you!

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• Squid on windows loadbalancing only to one server

  - by Martin L.

  After thousands of googles and trying days i cant get the load balancer/failover in squid on windows to work. Iam using squid 2.7. My webservers are 2 single NIC lighttpd and one dual nic lighttpd. server1 in this example is running squid on port 80 and lighttpd on port 8080 (just to test) Requirements: All 3 webservers running lighttpd should be balanced two option for load balancing: Best would be if server1 is busy server2 takes over, if server2 is busy server3 takes over, etc.. Round robin style evenly distributed load. Eg server1 takes first call, server2 second etc.. All requests should be treated the same way (no url rewriting or so on) Sent host headers have to be redirected to every server as http host header, speaking of "server1", "server1.company.internal" and "10.211.1.1". My approach: acl all src all acl manager proto cache_object http_port 80 accel defaultsite=server1.company.internal vhost #reverse proxy entries cache_peer 10.211.2.1 parent 8080 0 no-query originserver round-robin login=PASS name=server1_nic1 cache_peer 10.211.1.2 parent 80 0 no-query originserver round-robin login=PASS name=server2_nic1 cache_peer 10.211.2.3 parent 8080 0 no-query originserver round-robin login=PASS name=server3_nic1 cache_peer 10.211.2.4 parent 8080 0 no-query originserver round-robin login=PASS name=server3_nic2 #decl of names of squid host acl registered_name_hostdomain dstdomain server1.company.internal acl registered_name_host dstdomain server1 #ip of squid host acl registered_name_ip dstdomain 10.211.2.1 # access: redirects the correct squid hostname http_access allow registered_name_hostdomain http_access allow registered_name_host http_access allow registered_name_ip http_access deny all cache_peer_access server1_nic1 allow registered_name_hostdomain cache_peer_access server1_nic1 allow registered_name_host cache_peer_access server1_nic1 allow registered_name_ip cache_peer_access server2_nic1 allow registered_name_hostdomain cache_peer_access server2_nic1 allow registered_name_host cache_peer_access server2_nic1 allow registered_name_ip cache_peer_access server3_nic1 allow registered_name_hostdomain cache_peer_access server3_nic1 allow registered_name_host cache_peer_access server3_nic1 allow registered_name_ip cache_peer_access server3_nic2 allow registered_name_hostdomain cache_peer_access server3_nic2 allow registered_name_host cache_peer_access server3_nic2 allow registered_name_ip cache_peer_access server1_nic1 deny all cache_peer_access server2_nic1 deny all cache_peer_access server3_nic1 deny all cache_peer_access server3_nic2 deny all never_direct allow all Problems: Load balancer does not load balance other than to first server. Only if the first server is killed in any way the second will take over. I have seen the others working at some point, but definitely not as the intended load balancing described above. If the cache_peer_access is not defined sometimes the wrong hostname is sent to the backend webserver and this always depends on the defaultsite= parameter. Probably because the host header on the request to squid is not set and its replaced by defaultsite. Leaving out defaultsite didnt solve the problem. The only workaround i found for this is the current approach with cache_peer_access. Questions: Does the cache_peer_access influence the round-robin? Is there a better workaround to pass the host header to the backed webservers? Which parameters do increase the speed of load balancing or does anyone have a better approach? -Martin

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• A name was started with an invalid character. Error processing resource

  - by Gallen

  Here is the exact error I'm getting when I try to launch my default.aspx file from the published folder. Can anybody point me in the right direction? The XML page cannot be displayed Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later. -------------------------------------------------------------------------------- A name was started with an invalid character. Error processing resource 'file:///C:/inetpub/wwwroot/MHNProServices/Default.... <%@ Page Title="" Language="C#" MasterPageFile="~/ProServices.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs"... Here are the contents of default.aspx <%@ Page Title="" Language="C#" MasterPageFile="~/ProServices.Master" AutoEventWireup="False" CodeBehind="Default.aspx.cs" Inherits="MHNProServices.Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <link type="text/css" href="css/Default.css" rel="Stylesheet" /> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <div id="contentHead"> <img src="css/img/heading_landing.jpg" /> </div> <div id="contentTop"></div> <div id="content"> <div id="contentLeft"> <asp:Image ID="displayPicture" runat="server" /> <img id="displayOverlay"src="css/img/profilepicture_overlay.gif" /> <a id="contentButton_makeAppointment" href="Appointments.aspx?step=start"></a> <a id="contentButton_cancelAppointment" href="Appointments.aspx?step=cancel"></a> </div> <div id="contentRight"> <h3><asp:Label ID="lbl_homepageHeader" runat="server" Text=""></asp:Label></h3> <hr /> <asp:Label ID="lbl_homepageContent" runat="server" Text=""></asp:Label> </div> </div> <div id="contentBottom"></div> </asp:Content>

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• Reviews Cheyney Group Marketing: What accounting softwares are available in the market for small businesses?

  - by user225556

  Accounting is the language of business, and good accounting software can save you hundreds of hours at the business equivalent of Berlitz. There's no substitute for an accounting pro who knows the ins and outs of tax law, but today's desktop packages can help you with everything from routine bookkeeping to payroll, taxes, and planning. Each package also produces files that you can hand off to an accountant as needed. Small-business managers have more accounting software options than ever, including subscription Web-based options that don't require their users to install or update software. Many businesses, however--including those that need to track large inventories or client databases, and those that prefer not to entrust their data to the cloud--may be happier with a desktop tool. We looked at three general-purpose, small-business accounting packages: Acclivity AccountEdgePro 2012 (both the product and the company were previously called MYOB), Intuit QuickBooks Premier 2012, and Sage's Sage 50 Complete 2013 (the successor to Peachtree Complete). All three packages offer a solid array of tools for tracking income and expenses, invoicing, managing payroll, and creating reports. These full-featured and highly mature programs don't come cheap. Acclivity AccountEdge Pro, at $299, is the least expensive; and prices climb if you opt to use common time-saving add-ons such as payroll services, or if you add licenses for multiple user accounts. All three are solid on the basics, but they have distinct differences in style and focus. The more you know about your accounting requirements, the more closely you'll want to look at the software you're thinking of buying. Sage 50 Complete should appeal most to people who understand the fine points of accounting and can use the product's many customization features (especially for businesses that manage inventory). QuickBooks works hard to appeal to newbies who need only the basics and might be intimidated by the level of detail and technical language exposed in the other two packages. At the same time, it also has a slew of third-party add-ons that meet specific needs and greatly expand its capabilities. AccountEdge Pro balances accessibility with a strong feature set at an affordable price. It's especially suitable for businesses that need to provide simultaneous access to multiple users.

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• Local dns for testing websites using mobile devices

  - by Morpheu5

  Hi. I have no idea where to start from so sorry in advance if this topic has already been discussed. I usually develop web sites using my laptop as a development server, and recently I needed to test a web site using various mobile devices that can connect via wifi. Having no real AP, I set up a ad-hoc network using my laptop's wireless card and the devices can correctly browse the Internet and access the laptop's web server. The setup is as follows: subnet: 192.168.1.0/24 gateway to the Internet (wired adsl router/modem): 192.168.1.1 laptop: 192.168.1.64 (eth0, wired if connected to the gateway) and 192.168.1.32 (eth1, wifi if somewhat bridged to eth0) mobile devices (same for all, I only use one of them at any time for simplicity): 192.168.1.11 with default gw 192.168.1.1 Now, if I open either 192.168.1.32 or 192.168.1.64 from the mobile devices, I correctly get the default host of my Apache configuration. However I usually work with virtual hosts for many practical reasons, one of which being Drupal's peculiar implementation of multi-sites. For those who don't know how this works, Drupal takes the request's hostname and searches into its sites/ subdirectories for an appropriate configuration file. So, for example, suppose I request www.example.com, then Drupal would search for a config file in the following directories: sites/www.example.com/ sites/example.com/ sites/com/ sites/default/ So I decided to adopt the following style of virtual hosts: if the website I'm working on will be accessible using www.example.com I set up a sites/www.example.com/ directory and create a virtual host for local.www.example.com so Drupal have no trouble finding it. I've been told this is suboptimal from a dns point of view since I'd have to create an authoritative entry for example.com and turn Bind on only when I'm supposed to access the local copy, which is weird. However, if this is the only path I can follow, I still have some problems with Bind's configuration, as I couldn't find any guide that tells me in a clear, noob-friendly way, how to set up such an entry. On the other hand, I was wondering if I could set up an authoritative entry for local, so I could access www.example.com.local and tell in some way (which I don't even know if this is possible) Apache to put www.example.com instead of www.example.com.local in the relevant environment variable. Anyway, I have a last problem, sort of: when I launch Bind in debug mode with high verbosity, and make 192.168.1.32 as the primary dns for the devices, the output doesn't say anything about requests being made from the devices to Bind, so I'm not even sure it comes into play. As you can see, I'm a complete noob at these matters, but I'm eager to learn, so any help/pointer will be appreciated.

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• Reviews Cheyney Group Marketing: What accounting softwares are available in the market for small businesses?

  - by user224313

  Accounting is the language of business, and good accounting software can save you hundreds of hours at the business equivalent of Berlitz. There's no substitute for an accounting pro who knows the ins and outs of tax law, but today's desktop packages can help you with everything from routine bookkeeping to payroll, taxes, and planning. Each package also produces files that you can hand off to an accountant as needed. Small-business managers have more accounting software options than ever, including subscription Web-based options that don't require their users to install or update software. Many businesses, however--including those that need to track large inventories or client databases, and those that prefer not to entrust their data to the cloud--may be happier with a desktop tool. We looked at three general-purpose, small-business accounting packages: Acclivity AccountEdgePro 2012 (both the product and the company were previously called MYOB), Intuit QuickBooks Premier 2012, and Sage's Sage 50 Complete 2013 (the successor to Peachtree Complete). All three packages offer a solid array of tools for tracking income and expenses, invoicing, managing payroll, and creating reports. These full-featured and highly mature programs don't come cheap. Acclivity AccountEdge Pro, at $299, is the least expensive; and prices climb if you opt to use common time-saving add-ons such as payroll services, or if you add licenses for multiple user accounts. All three are solid on the basics, but they have distinct differences in style and focus. The more you know about your accounting requirements, the more closely you'll want to look at the software you're thinking of buying. Sage 50 Complete should appeal most to people who understand the fine points of accounting and can use the product's many customization features (especially for businesses that manage inventory). QuickBooks works hard to appeal to newbies who need only the basics and might be intimidated by the level of detail and technical language exposed in the other two packages. At the same time, it also has a slew of third-party add-ons that meet specific needs and greatly expand its capabilities. AccountEdge Pro balances accessibility with a strong feature set at an affordable price. It's especially suitable for businesses that need to provide simultaneous access to multiple users.

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• A name was started with an invalid character. Error processing resource

  - by Gallen

  Here is the exact error I'm getting when I try to launch my default.aspx file from the published folder. Can anybody point me in the right direction? The XML page cannot be displayed Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later. -------------------------------------------------------------------------------- A name was started with an invalid character. Error processing resource 'file:///C:/inetpub/wwwroot/MHNProServices/Default.... <%@ Page Title="" Language="C#" MasterPageFile="~/ProServices.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs"... Here are the contents of default.aspx <%@ Page Title="" Language="C#" MasterPageFile="~/ProServices.Master" AutoEventWireup="False" CodeBehind="Default.aspx.cs" Inherits="MHNProServices.Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <link type="text/css" href="css/Default.css" rel="Stylesheet" /> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <div id="contentHead"> <img src="css/img/heading_landing.jpg" /> </div> <div id="contentTop"></div> <div id="content"> <div id="contentLeft"> <asp:Image ID="displayPicture" runat="server" /> <img id="displayOverlay"src="css/img/profilepicture_overlay.gif" /> <a id="contentButton_makeAppointment" href="Appointments.aspx?step=start"></a> <a id="contentButton_cancelAppointment" href="Appointments.aspx?step=cancel"></a> </div> <div id="contentRight"> <h3><asp:Label ID="lbl_homepageHeader" runat="server" Text=""></asp:Label></h3> <hr /> <asp:Label ID="lbl_homepageContent" runat="server" Text=""></asp:Label> </div> </div> <div id="contentBottom"></div> </asp:Content>

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• "pdf_open: Not a PDF 1.[1-5] file." when typesetting TeX file in TextMate

  - by Manti

  I have a TeX file, which is typeset by XeLaTeX. The file has \includegraphics{coverimage.eps} on the first page, and coverimage.eps is located in the same directory as the TeX file. OS: MacOS 10.6.5, TextMate 1.5.10, xelatex 3.1415926-2.2-0.9997.4 (TeX Live 2010) If I run xelatex doc.tex in console, file compiles without errors, and eps file is included. If I typeset it in TextMate (xelatex engine is selected in preferences), I get the following error: ** WARNING ** pdf_open: Not a PDF 1.[1-5] file. ** WARNING ** Failed to include image file "./coverimage.eps" ** WARNING ** >> Please check if ** WARNING ** >> rungs -q -dNOPAUSE -dBATCH -sPAPERSIZE=a0 -sDEVICE=pdfwrite -dCompatibilityLevel=%v -dAutoFilterGrayImages=false -dGrayImageFilter=/FlateEncode -dAutoFilterColorImages=false -dColorImageFilter=/FlateEncode -sOutputFile=%o %i -c quit ** WARNING ** >> %o = output filename, %i = input filename, %b = input filename without suffix ** WARNING ** >> can really convert "./coverimage.eps" to PDF format image. ** WARNING ** pdf: image inclusion failed for "coverimage.eps". ** WARNING ** Failed to read image file: coverimage.eps ** WARNING ** Interpreting special command PSfile (ps:) failed. ** WARNING ** >> at page="1" position="(107.149, 124.566)" (in PDF) ** WARNING ** >> xxx "PSfile="coverimage.eps" llx=0 lly=0 urx=408 ury=526 rwi=3809 and there is no image included in the resulting file (but text looks ok). I am not sure whether it is the error of xelatex or TextMate LaTeX bundle. What I tried to do: As I said, xelatex doc.tex from console works. The exact command line that TextMate uses is: xelatex -interaction=nonstopmode -file-line-error-style -synctex=1 But it works from console too. If I convert the image to pdf (and fix the .tex file accordingly), typesetting from TextMate works too. I tried running rungs with parameters specified in the error message, and got valid .pdf file with image as a result. I compared .log files from typesetting in TextMate and in console, they are absolutely identical except for this error message (in particular, version of xelatex is the same). Does anyone know what can cause this? Please tell me if you need any additional information. Thank you in advance.

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• How do I configure Reverse Group Membership Maintenance on an openldap server? (memberOf)

  - by emills

  I am currently working on integrating LDAP authentication into a system and I would like to restrict access based on LDAP group. The only way to do this is via a search filter and therefore I believe my only option to be the use of the "memberOf" attribute in my search filter. It is my understanding that the "memberOf" attribute is an operational attribute which can be created by the server for me anytime a new "member" attribute is created for any "groupOfNames" entry on the server. My main goal is to be able to add a "member" attribute to an existing "groupOfNames" entry and have a matching "memberOf" attribute be added to the DN I provide. What I have managed to achieve so far: I'm still pretty new to LDAP administration but based on what I found in the openldap admin's guide, it looks like Reverse Group Membership Maintence aka "memberof overlay" would achieve exactly the effect I am looking for. My server is currently running a package installation (slapd on ubuntu) of openldap 2.4.15 which uses "cn=config" style runtime configuration. Most of the examples I have found still reference the older "slapd.conf" method of static configuration and I have tried my best to adapt the configurations to the new directory based model. I have added the following entries to enable the memberof overlay module: Enable the module with olcModuleLoad cn=config/cn\=module\{0\}.ldif dn: cn=module{0} objectClass: olcModuleList cn: module{0} olcModulePath: /usr/lib/ldap olcModuleLoad: {0}back_hdb olcModuleLoad: {1}memberof.la structuralObjectClass: olcModuleList entryUUID: a410ce98-3fdf-102e-82cf-59ccb6b4d60d creatorsName: cn=config createTimestamp: 20090927183056Z entryCSN: 20091009174548.503911Z#000000#000#000000 modifiersName: cn=admin,cn=config modifyTimestamp: 20091009174548Z Enabled the overlay for the database and allowed it to use it's default settings (groupOfNames,member,memberOf,etc) cn=config/olcDatabase={1}hdb/olcOverlay\=\{0\}memberof dn: olcOverlay={0}memberof objectClass: olcMemberOf objectClass: olcOverlayConfig objectClass: olcConfig objectClass: top olcOverlay: {0}memberof structuralObjectClass: olcMemberOf entryUUID: 6d599084-490c-102e-80f6-f1a5d50be388 creatorsName: cn=admin,cn=config createTimestamp: 20091009104412Z olcMemberOfRefInt: TRUE entryCSN: 20091009173500.139380Z#000000#000#000000 modifiersName: cn=admin,cn=config modifyTimestamp: 20091009173500Z My current result: By using the above configuration, I am able to add a NEW "groupOfNames" with any number of "member" entries and have all the involved DNs updated with a "memberOf" attribute. This is part of the behavior I would expect. While I believe the following should have been accomplished with the memberof overlay, I still do not know how to do the following and I would gladly welcome any advice: Add a "member" attribute to an EXISTING "groupOfNames" and have a corresponding "memberOf" attribute be created automatically. Remove a "member" attribute and have the corresponding "memberOf" attribute" be removed automatically.

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• Problem using ‘useLegacyV2RuntimeActivationPolicy’ & supportedRuntime in an application

  - by Notre

  Hello, I've modified a couple of different applications' .config file like this: <startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0"/> </startup> When I did this for devenv.exe.config (VS 2005 - don't ask :) ), things work great - most of the Visual Studio used .NET 2.0 but I was able to make use of an assembly targeting .NET 4.0 framework. I tried to do the same thing for a custom .exe, which happens to be based on MS CAB (slightly modified) and has a hybrid mix of WPF and WinForms content. As soon as I modified this application's app config file, I started getting this exception, sometime during application startup: The Undo operation encountered a context that is different from what was applied in the corresponding Set operation. The possible cause is that a context was Set on the thread and not reverted(undone). System.InvalidOperationException: The Undo operation encountered a context that is different from what was applied in the corresponding Set operation. The possible cause is that a context was Set on the thread and not reverted(undone). There's a big long stack trace that doesn't show anything in my application code directly (just a bunch of MS assemblies). If I modify the application's .config file to this: <startup useLegacyV2RuntimeActivationPolicy="true"> </startup> i.e.I remove the supportedRuntime element, then the application doesn't throw this exception. But when I go to the point in my code where I try to load my .NET 4 assembly, if fails with this: System.BadImageFormatException: Could not load file or assembly '' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. I guess this is expected. I have two questions: 1) Any idea why I'm getting the System.InvalidOperationException exception when I modify this application's configuration file to include the supportedRuntime element, adding .NET 4 support and any suggestions on what I can do about it? 2) If the answer is "no idea why/don't know what you can do about it", then is possible for my .NET 3.5 SP1 code (C#) to provide more fine grain support for conditionally adding .NET 4 runtime support for a certain assembly(ies) without converting my entire application to target .NET 4, or without using the declarative config file approach? At some point I would convert the entire application to target .NET 4, but for the short term this is daunting task and I'm hope for some short term solution/hack. Thank you very much for any advice you can give!

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• Application Architecture using WCF and System.AddIn

  - by Silverhalide

  A little background -- we're designing an application that uses a client/server architecture consisting of: A server which loads server-side modules, potentially developed by other teams. A client which loads corresponding client-side modules (also potentially developed by those other teams; each client module corresponds with a server module). The client side communicates with the server side for general coordination, and as well as module specific tasks. (At this point, I think that means client talks to server, client modules talk to server modules.) Environment is .NET 3.5, and client side is WPF. The deployment scenario introduces the potential to upgrade the server, any server-side module, the client, and any client-side module independently. However, being able to "work" using mismatched versions is required. I'm therefore concerned about versioning issues. My thinking so far: A Windows Service for the server. Using System.AddIn for the server to load and communicate with the server modules will give us the greatest flexibility in terms of version compatability between server and server modules. The server and each server module vend WCF services for communication to the client side; communication between the server and a server module, or between two server modules use the AddIn contracts. (One advantage of this is that a module can expose a different interface within the server and outside it.) Similarly, the client uses System.AddIn to find, load, and communicate with the client modules. Client communications with client modules is via the AddIn interface; communications from the client and from client modules to the server side are via WCF. For maximum resilience, each module will run in a separate app-domain. In general, the system has modest performance requirements, so marshalling and crossing process boundaries is not expected to be a performance concern. (Performance requirement is basically summed up by: don't get in the way of the other parts of the system not described here.) My questions are around the idea of having two different communication and versioning models to work with which will be an added burden on our developers. System.AddIn seems quite powerful, but also a little unwieldly. (I'm also unsure of Microsoft's commitment to it in the future.) On the other hand, I'm not thrilled with WCF's versioning capabilities. I have a feeling that it would be possible to implement the System.AddIn view/adapter/contract system within WCF, but being fairly new to both technologies, I would have no idea of where to start. So... Am I on the right track here? Am I doing this the hard way? Are there gotchas I need to be aware of on this road? Thanks.

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• Synchronized Enumerator in C#

  - by Dan Bryant

  I'm putting together a custom SynchronizedCollection<T> class so that I can have a synchronized Observable collection for my WPF application. The synchronization is provided via a ReaderWriterLockSlim, which, for the most part, has been easy to apply. The case I'm having trouble with is how to provide thread-safe enumeration of the collection. I've created a custom IEnumerator<T> nested class that looks like this: private class SynchronizedEnumerator : IEnumerator<T> { private SynchronizedCollection<T> _collection; private int _currentIndex; internal SynchronizedEnumerator(SynchronizedCollection<T> collection) { _collection = collection; _collection._lock.EnterReadLock(); _currentIndex = -1; } #region IEnumerator<T> Members public T Current { get; private set;} #endregion #region IDisposable Members public void Dispose() { var collection = _collection; if (collection != null) collection._lock.ExitReadLock(); _collection = null; } #endregion #region IEnumerator Members object System.Collections.IEnumerator.Current { get { return Current; } } public bool MoveNext() { var collection = _collection; if (collection == null) throw new ObjectDisposedException("SynchronizedEnumerator"); _currentIndex++; if (_currentIndex >= collection.Count) { Current = default(T); return false; } Current = collection[_currentIndex]; return true; } public void Reset() { if (_collection == null) throw new ObjectDisposedException("SynchronizedEnumerator"); _currentIndex = -1; Current = default(T); } #endregion } My concern, however, is that if the Enumerator is not Disposed, the lock will never be released. In most use cases, this is not a problem, as foreach should properly call Dispose. It could be a problem, however, if a consumer retrieves an explicit Enumerator instance. Is my only option to document the class with a caveat implementer reminding the consumer to call Dispose if using the Enumerator explicitly or is there a way to safely release the lock during finalization? I'm thinking not, since the finalizer doesn't even run on the same thread, but I was curious if there other ways to improve this.

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• realtime logging

  - by Ion Todirel

  I have an application which has a loop, part of a "Scheduler", which runs at all time and is the heart of the application. Pretty much like a game loop, just that my application is a WPF application and it's not a game. Naturally the application does logging at many points, but the Scheduler does some sensitive monitoring, and sometimes it's impossible just from the logs to tell what may have gotten wrong (and by wrong I don't mean exceptions) or the current status. Because Scheduler's inner loop runs at short intervals, you can't do file I/O-based logging (or using the Event Viewer) in there. First, you need to watch it in real-time, and secondly the log file would grow in size very fast. So I was thinking of ways to show this data to the user in the realtime, some things I considered: Display the data in realtime in the UI Use AllocConsole/WriteConsole to display this information in a console Use a different console application which would display this information, communicate between the Scheduler and the console app using pipes or other IPC techniques Use Windows' Performance Monitor and somehow feed it with this information ETW Displaying in the UI would have its issues. First it doesn't integrate with the UI I had in mind for my application, and I don't want to complicate the UI just for this. This diagnostics would only happen rarely. Secondly, there is going to be some non-trivial data protection, as the Scheduler has it's own thread. A separate console window would work probably, but I'm still worried if it's not too much threshold. Allocating my own console, as this is a windows app, would probably be better than a different console application (3), as I don't need to worry about IPC communication, and non-blocking communication. However a user could close the console I allocated, and it would be problematic in that case. With a separate process you don't have to worry about it. Assuming there is an API for Performance Monitor, it wouldn't be integrated too well with my app or apparent to the users. Using ETW also doesn't solve anything, just a random idea, I still need to display this information somehow. What others think, would there be other ways I missed?

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• SilverLight 3 Beginner question: Scroll with mousewheel and zoom image with panning

  - by JP Hellemons

  Hello, I would like to make a small silverlight app which displays one fairly large image which can be zoomed in by scrolling the mouse and then panned with the mouse. it's similar to the function in google maps and i do not want to use deepzoom. here is what i have at the moment. please keep in mind that this is my first silverlight app: this app is just for me to see it's a good way to build in a website. so it's a demo app and therefor has bad variable names. the initial image is 1800px width. private void sc_MouseWheel(object sender, MouseWheelEventArgs e) { var st = (ScaleTransform)plaatje.RenderTransform; double zoom = e.Delta > 0 ? .1 : -.1; st.ScaleX += zoom; st.ScaleY += zoom; } this works, but could use some smoothing and it's positioned top left and not centered. the panning is like this: found it @ http://stackoverflow.com/questions/741956/wpf-pan-zoom-image and converted it to this below to work in silverlight Point start; Point origin; bool captured = false; private void plaatje_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { plaatje.CaptureMouse(); captured = true; var tt = (TranslateTransform)((TransformGroup)plaatje.RenderTransform) .Children.First(tr => tr is TranslateTransform); start = e.GetPosition(canvasje); origin = new Point(tt.X, tt.Y); } private void plaatje_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { plaatje.ReleaseMouseCapture(); captured = false; } private void plaatje_MouseMove(object sender, MouseEventArgs e) { if (!captured) return; var tt = (TranslateTransform)((TransformGroup)plaatje.RenderTransform).Children.First(tr => tr is TranslateTransform); double xVerschuiving = start.X - e.GetPosition(canvasje).X; double yVerschuiving = start.Y - e.GetPosition(canvasje).Y; tt.X = origin.X - xVerschuiving; tt.Y = origin.Y - yVerschuiving; } so the scaling isn't smooth and the panning isn't working, because when i click it, the image disappears. thanks in advanced!

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• Using FluentNHibernate + SQLite with .Net4?

  - by stiank81

  I have a WPF application running with .Net3.5 using FluentNHibernate, and all works fine. When I upgraded to VS2010 I ran into some odd problems, but after changing to use x64 variant of SQLite it worked fine again. Now I want to change to use .Net4, but this has turned into a more painful experience then I expected.. When calling FluentConfiguration.BuildConfiguration I get an exception thrown: FluentConfigurationException unhandled An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail The inner exception gives us more information: Message = "Could not create the driver from NHibernate.Driver.SQLite20Driver, NHibernate, Version=2.1.2.4000, Culture=neutral, PublicKeyToken=aa95f207798dfdb4." It has an InnerException again: Exception has been thrown by the target of an invocation. Which again has an InnerException: The IDbCommand and IDbConnection implementation in the assembly System.Data.SQLite could not be found. Ensure that the assembly System.Data.SQLite is located in the application directory or in the Global Assembly Cache. If the assembly is in the GAC, use element in the application configuration file to specify the full name of the assembly. Now - to me it sounds like it doesn't find System.Data.SQLite.dll, but I can't understand this. Everywhere this is referenced I have "Copy Local", and I have verified that it is in every build folder for projects using SQLite. I have also copied it manually to every Debug folder of the solution - without luck. Notes: This exact same code worked just fine before I upgraded to .Net4. I did see some x64 x86 mismatch problems earlier, but I have switched to use x86 as the target platform and for all referenced dlls. I have verified that all files in the Debug-folder are x86. I have tried the precompiled Fluent dlls, I have tried compiling myself, and I have compiled my own version of Fluent using .Net4. I see that there are also others that have seen this problem, but I haven't really seen any solution yet. After @devio's answer I tried adding a reference to the SQLite dll. This didn't change anything, but I hope I made it right though.. This is what I added to the root node of the app.config file: <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <qualifyAssembly partialName="System.Data.SQLite" fullName="System.Data.SQLite, Version=1.0.60.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" /> </assemblyBinding> </runtime> Anyone out there using Fluent with .Net4 and SQLite successfully? Help! I'm lost...

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• Synchronized IEnumerator<T>

  - by Dan Bryant

  I'm putting together a custom SynchronizedCollection<T> class so that I can have a synchronized Observable collection for my WPF application. The synchronization is provided via a ReaderWriterLockSlim, which, for the most part, has been easy to apply. The case I'm having trouble with is how to provide thread-safe enumeration of the collection. I've created a custom IEnumerator<T> nested class that looks like this: private class SynchronizedEnumerator : IEnumerator<T> { private SynchronizedCollection<T> _collection; private int _currentIndex; internal SynchronizedEnumerator(SynchronizedCollection<T> collection) { _collection = collection; _collection._lock.EnterReadLock(); _currentIndex = -1; } #region IEnumerator<T> Members public T Current { get; private set;} #endregion #region IDisposable Members public void Dispose() { var collection = _collection; if (collection != null) collection._lock.ExitReadLock(); _collection = null; } #endregion #region IEnumerator Members object System.Collections.IEnumerator.Current { get { return Current; } } public bool MoveNext() { var collection = _collection; if (collection == null) throw new ObjectDisposedException("SynchronizedEnumerator"); _currentIndex++; if (_currentIndex >= collection.Count) { Current = default(T); return false; } Current = collection[_currentIndex]; return true; } public void Reset() { if (_collection == null) throw new ObjectDisposedException("SynchronizedEnumerator"); _currentIndex = -1; Current = default(T); } #endregion } My concern, however, is that if the Enumerator is not Disposed, the lock will never be released. In most use cases, this is not a problem, as foreach should properly call Dispose. It could be a problem, however, if a consumer retrieves an explicit Enumerator instance. Is my only option to document the class with a caveat implementer reminding the consumer to call Dispose if using the Enumerator explicitly or is there a way to safely release the lock during finalization? I'm thinking not, since the finalizer doesn't even run on the same thread, but I was curious if there other ways to improve this. EDIT After thinking about this a bit and reading the responses (particular thanks to Hans), I've decided this is definitely a bad idea. The biggest issue actually isn't forgetting to Dispose, but rather a leisurely consumer creating deadlock while enumerating. I now only read-lock long enough to get a copy and return the enumerator for the copy.

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• realtime diagnostics

  - by Ion Todirel

  I have an application which has a loop, part of a "Scheduler", which runs at all time and is the heart of the application. Pretty much like a game loop, just that my application is a WPF application and it's not a game. Naturally the application does logging at many points, but the Scheduler does some sensitive monitoring, and sometimes it's impossible just from the logs to tell what may have gotten wrong (and by wrong I don't mean exceptions) or the current status. Because Scheduler's inner loop runs at short intervals, you can't do file I/O-based logging (or using the Event Viewer) in there. First, you need to watch it in real-time, and secondly the log file would grow in size very fast. So I was thinking of ways to show this data to the user in the realtime, some things I considered: Display the data in realtime in the UI Use AllocConsole/WriteConsole to display this information in a console Use a different console application which would display this information, communicate between the Scheduler and the console app using pipes or other IPC techniques Use Windows' Performance Monitor and somehow feed it with this information ETW Displaying in the UI would have its issues. First it doesn't integrate with the UI I had in mind for my application, and I don't want to complicate the UI just for this. This diagnostics would only happen rarely. Secondly, there is going to be some non-trivial data protection, as the Scheduler has it's own thread. A separate console window would work probably, but I'm still worried if it's not too much threshold. Allocating my own console, as this is a windows app, would probably be better than a different console application (3), as I don't need to worry about IPC communication, and non-blocking communication. However a user could close the console I allocated, and it would be problematic in that case. With a separate process you don't have to worry about it. Assuming there is an API for Performance Monitor, it wouldn't be integrated too well with my app or apparent to the users. Using ETW also doesn't solve anything, just a random idea, I still need to display this information somehow. What others think, would there be other ways I missed?

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