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  • How could I make this display for listbox?

    - by baron
    Hello everyone, I have a databound listbox which is actually displaying two columns of data. It is displayed as follows: <UserControl.Resources> <DataTemplate x:Key="AlignedPairs"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="10" /> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> <TextBlock Text="{Binding Fruits}" Grid.Column="0" /> <TextBlock Text="->" TextAlignment="Center" Grid.Column="1" /> <TextBlock Text="{Binding Colors}" Grid.Column="3" /> </Grid> </DataTemplate> </UserControl.Resources> <ListBox Name="lbStuff" Grid.ColumnSpan="2" Grid.Row="1" ItemTemplate="{StaticResource AlignedPairs}"> <ListBox.ItemContainerStyle> <Style TargetType="ListBoxItem"> <Setter Property="HorizontalContentAlignment" Value="Stretch" /> </Style> </ListBox.ItemContainerStyle> </ListBox> Then Itemsource set in codebehind. Based on some logic however, I would like to set either a line or a item in one of the columns, e.g. a fruit to red, or the line to bold. I have code to work out which Fruit or Color I would like to differentiate (by color/bold) in the code behind, but I can't figure out, especially given the custom listbox display, how I could go about setting a particular item to a different color/bold. Does anyone have any ideas? Let me know if any further code is required. Cheers.

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  • Memory leak with NSData

    - by Kamchatka
    I'm having a leak with this code without being able to find where it's coming from. This function get called within an autorelease pool. I release the IplImage* image argument. When I run the ObjAlloc tool, it tells me that "NSData* data" is leaking. If I try to manually release the UIImage returned by this function, I get an EXC_BAD_ACCESS error, probably because this UIImage is autoreleased. I'm a bit confused, any hint would be appreciated. Thanks! UIImage *UIImageFromIplImage(IplImage *image) { NSLog(@"IplImage (%d, %d) %d bits by %d channels, %d bytes/row %s", image->width, image->height, image->depth, image->nChannels, image->widthStep, image->channelSeq); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); NSData *data = [NSData dataWithBytes:image->imageData length:image->imageSize]; CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data); CGImageRef imageRef = CGImageCreate(image->width, image->height, image->depth, image->depth * image->nChannels, image->widthStep, colorSpace, kCGImageAlphaNone|kCGBitmapByteOrderDefault, provider, NULL, false, kCGRenderingIntentDefault); UIImage *ret = [UIImage imageWithCGImage:imageRef]; CGImageRelease(imageRef); CGDataProviderRelease(provider); CGColorSpaceRelease(colorSpace); return ret; }

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  • Working around MySQL error "Deadlock found when trying to get lock; try restarting transaction"

    - by Anon Guy
    Hi all: I have a MySQL table with about 5,000,000 rows that are being constantly updated in small ways by parallel Perl processes connecting via DBI. The table has about 10 columns and several indexes. One fairly common operation gives rise to the following error sometimes: DBD::mysql::st execute failed: Deadlock found when trying to get lock; try restarting transaction at Db.pm line 276. The SQL statement that triggers the error is something like this: UPDATE file_table SET a_lock = 'process-1234' WHERE param1 = 'X' AND param2 = 'Y' AND param3 = 'Z' LIMIT 47 The error is triggered only sometimes. I'd estimate in 1% of calls or less. However, it never happened with a small table and has become more common as the database has grown. Note that I am using the a_lock field in file_table to ensure that the four near-identical processes I am running do not try and work on the same row. The limit is designed to break their work into small chunks. I haven't done much tuning on MySQL or DBD::mysql. MySQL is a standard Solaris deployment, and the database connection is set up as follows: my $dsn = "DBI:mysql:database=" . $DbConfig::database . ";host=${DbConfig::hostname};port=${DbConfig::port}"; my $dbh = DBI->connect($dsn, $DbConfig::username, $DbConfig::password, { RaiseError => 1, AutoCommit => 1 }) or die $DBI::errstr; I have seen online that several other people have reported similar errors and that this may be a genuine deadlock situation. I have two questions: What exactly about my situation is causing the error above? Is there a simple way to work around it or lessen its frequency? For example, how exactly do I go about "restarting transaction at Db.pm line 276"? Thanks in advance.

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  • Limit the number of rows returned on the server side (forced limit)

    - by evolve
    So we have a piece of software which has a poorly written SQL statement which is causing every row from a table to be returned. There are several million rows in the table so this is causing serious memory issues and crashes on our clients machine. The vendor is in the process of creating a patch for the issue, however it is still a few weeks out. In the mean time we were attempting to figure out a method of limiting the number of results returned on the server side just as a temporary fix. I have no real hope of there being a solution, I've looked around and don't really see any ways of doing this, however I'm hoping someone might have an idea. Thank you in advance. EDIT I forgot an important piece of information, we have no access to the source code so we can not change this on the client side where the SQL statement is formed. There is no real server side component, the client just accesses the database directly. Any solution would basically require a procedure, trigger, or some sort of SQL-Server 2008 setting/command.

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  • RESTful WCF Data Service Authentication

    - by Adrian Grigore
    Hi, I'd like to implement a REST api to an existing ASP.NET MVC website. I've managed to set up WCF Data services so that I can browse my data, but now the question is how to handle authentication. Right now the data service is secured via the site's built in forms authentication, and that's ok when accessing the service from AJAX forms. However, It's not ideal for a RESTful api. What I would like as an alternative to forms authentication is for the users to simply embed the user name and password into the url to the web service or as request parameters. For example, if my web service is usually accessible as http://localhost:1234/api.svc I'd like to be able to access it using the url http://localhost:1234/api.svc/{login}/{password} So, my questions are as follows: Is this a sane approach? If yes, how can I implement this? It seems trivial redirecting GET requests so that the login and password are attached as GET parameters. I also know how to inspect the http context and use those parameters to filter the results. But I am not sure if / how the same approach could be applied to POST, PUT and DELETE requests. Thanks, Adrian

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  • ACL architechture for a Software As a service in Spring 3.0

    - by geoaxis
    I am making a software as a service using Spring 3.0 (Spring MVC, Spring Security, Spring Roo, Hibernate) I have to come up with a flexible access control list mechanism.I have three different kinds of users System (who can do any thing to the system, includes admin and internal daemons) Operations (who can add and delete users, organizations, and do maintenance work on behalf of users and organizations) End Users (they belong to one or more organization, for each organization, the user can have one or more roles, like being organization admin, or organization read-only member) (role like orgadmin can also add users for that organization) Now my question is, how should i model the entity of User? If I just take the End User, it can belong to one or more organizations, so each user can contain a set of references to its organizations. But how do we model the users role for each organization, So for example User UX belongs to organizations og1, og2 and og3, and for og1 he is both orgadmin, and org-read-only-user, where as for og2 he is only orgadmin and for og3 he is only org-read-only-user I have the possibility of making each user belong to one organization alone, but that's making the system bounded and I don't like that idea (although i would still satisfy the requirement) If you have a better extensible ACL architecture, please suggest it. Since its a software as a service, one would expect that alot of different organizations would be part if the same system. I had one concern that it is not a good idea to keep og1 and og2 data on the same DB (if og1 decides to spawn a 100 reports on the system, og2 should not suffer) But that is some thing advanced for now and is not directly related to ACL but to the physical distribution of data and setup of services based on those ACLs This is a community Wiki question, please correct any thing which you wish to do so. Thanks

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  • jQuery ajax link, returned data includes a from that wont submit

    - by calumogg
    Hi everyone, I have a problem with the returned data from a ajax request. Basically when I click on a link it runs a ajax request to load some html into a div, that part is working fine the problem comes when the data has been loaded. Part of the html loaded is a form, this form works fine if I load the page directly but when it is loaded through ajax into the div it wont submit but the rest of the links in the html work fine. Here is the code that requests the remote html data: // Ajax to load image editing page $('a.editpicture').click(function(e) { e.preventDefault(); var picture = $(this).attr("id") $.ajax({ url: 'http://localhost/digital-xposure/index.php/members/viewpicture/' + picture, success: function(data) { $('#update-picture').html(data); } }); }); This is the form it loads: <form method="post" id="updatepicture" name="updatepicture" action="http://localhost/digital-xposure/index.php/members/editpicture"/> <p>Title<input type="text" name="title" id="title" style="input" value="<?php echo $title; ?>"></P> <p>Album<?php echo $albums;?></p> <p>Description<textarea name="description" id="description" cols="50" rows="5"><?php echo $description; ?></textarea></P> <input type="hidden" name="filename" id="filename" value="<?php echo $filename; ?>" /> <input type="button" name="update-submit" id="update-submit" value="Update details" class="button"> Or <input type="button" onClick="location.href='<?php echo base_url(); ?>index.php/members/deletepicture/<?php echo $filename; ?>'" value="Delete picture" class="button"> </form> Any ideas why the form wont submit after being loaded into the div? Any help is greatly appreciated, thanks. Calum

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  • Strange VS2005 compile errors: unable to locate resource file (because the compiler keeps deleting i

    - by Velika
    I AM GETTING THE FOLLOWING ERROR IN A VERY SIMPLE CLASS LIBRARY: Error 1 Unable to copy file "obj\Debug\SMIT.SysAdmin.BusinessLayer.Resources.resources" to "obj\Debug\SMIT.SysAdmin.BusinessLayer.SMIT.SysAdmin.BusinessLayer.Resources.resources". Could not find file 'obj\Debug\SMIT.SysAdmin.BusinessLayer.Resources.resources'. SMIT.SysAdmin.BusinessLayer Going to the Project Properties-Resource tab, I see that I defined do resources. Still, I tried to delete the resource file and recreate by going to the resource tab. When I recompile, I still get the same error. Why is it even looking for a resource file? I define no resources on teh project properties tab and added no new resource file items. Any suggestions of things to try? Update: I found the missing file in an old backup. I copied it to the location where the compiler expected it, and then successfully recompiled the project that previously had compile time errors. However, when I rebuild the entire solution, it deletes the file that I previously restored and I'm back to where I started. My solution contains several projects (maybe 10 or so). Could VS 2005 be having a problem determining dependencies and the proper order to compile these projects?

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  • How can I use Qt to get html code of the redirected page??

    - by Claire Huang
    I'm trying to use Qt to download the html code from the following url: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=nucleotide&cmd=search&term=AB100362 this url will re-direct to www.ncbi.nlm.nih.gov/nuccore/27884304 I try to do it by following way, but I cannot get anything. it works for some webpage such as www.google.com, but not for this NCBI page. is there any way to get this page?? QNetworkReply::NetworkError downloadURL(const QUrl &url, QByteArray &data) { QNetworkAccessManager manager; QNetworkRequest request(url); QNetworkReply *reply = manager.get(request); QEventLoop loop; QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit())); loop.exec(); if (reply->error() != QNetworkReply::NoError) { return reply->error(); } data = reply->readAll(); delete reply; return QNetworkReply::NoError; } void GetGi() { int pos; QString sGetFromURL = "http://www.ncbi.nlm.nih.gov/entrez/query.fcgi"; QUrl url(sGetFromURL); url.addQueryItem("db", "nucleotide"); url.addQueryItem("cmd", "search"); url.addQueryItem("term", "AB100362"); QByteArray InfoNCBI; int errorCode = downloadURL(url, InfoNCBI); if (errorCode != 0 ) { QMessageBox::about(0,tr("Internet Error "), tr("Internet Error %1: Failed to connect to NCBI.\t\nPlease check your internect connection.").arg(errorCode)); return "ERROR"; } }

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  • Time complexity for Search and Insert operation in sorted and unsorted arrays that includes duplicat

    - by iecut
    1-)For sorted array I have used Binary Search. We know that the worst case complexity for SEARCH operation in sorted array is O(lg N), if we use Binary Search, where N are the number of items in an array. What is the worst case complexity for the search operation in the array that includes duplicate values, using binary search?? Will it be the be the same O(lg N)?? Please correct me if I am wrong!! Also what is the worst case for INSERT operation in sorted array using binary search?? My guess is O(N).... is that right?? 2-) For unsorted array I have used Linear search. Now we have an unsorted array that also accepts duplicate element/values. What are the best worst case complexity for both SEARCH and INSERT operation. I think that we can use linear search that will give us O(N) worst case time for both search and delete operations. Can we do better than this for unsorted array and does the complexity changes if we accepts duplicates in the array.

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  • «HTTP::Message content must be bytes» error when trying to post

    - by ZyX
    I have the following code: ... sub setImage { my $self=shift; my $filename=shift; unless(-r $filename) { warn "File $filename not found"; return; } my $imgn=shift; my $operation=&URI::Escape::uri_escape_utf8( (shift) ? "???????! (Delete)" : "?????????! (Store)"); my $FH=&::File::open($filename, 0, 0); my $image; # &utf8::downgrade($image); sysread($FH, $image, 102400, 0); close $FH; my $imginfo=eval{&Image::Info::image_info(\$image)}; if($@ or $imginfo->{"error"}) { warn "Invalid image: ".($@ || $imginfo->{"error"}); return undef; } my $fields=[ DIR => $self->url("fl"), OPERATION => $operation, FILE_NAME => ".photo$imgn", # FILE => [$filename], FILE => [undef, "image.".$imginfo->{"file_ext"}, # Content_Type => $imginfo->{"file_media_type"}, # Content_Type => 'application/octet-stream', Content => $image, ], ]; my $response=&ZLR::UA::post( &ZLR::UA::absURL("/cgi-bin/file_manager")."", $fields, Content_Type => "form-data", ); print $response->decoded_content; } ... When I try to use function setImage it fails with error HTTP::Message content must be bytes at /usr/lib64/perl5/vendor_perl/5.8.8/HTTP/Request/Common.pm line 91. Worse that I can't reproduce this error without using all of my code and upgrading libwww-perl does nothing. What can cause it?

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  • Problem reintegrating a branch into the trunk in Subversion 1.5

    - by pako
    I'm trying to reintegrate a development branch into the trunk in my Subversion 1.5 repository. I merged all the changes from the trunk to the development branch prior to this operation. Now when I try to reintegrate the changes from the branch I get the following error message: Command: Reintegrate merge https://dev/svn/branches/devel into C:\trunk Error: Reintegrate can only be used if revisions 280 through 325 were previously Error: merged from https://dev/svn/trunk to the reintegrate Error: source, but this is not the case: Error: branches/devel/images/test Error: Missing ranges: /trunk/images/test:280-324 ... The message then goes on complaining about some folders in my project. But when I try to merge the changes from the trunk to the development branch again, TortoiseSVN tells me that there's nothing to merge (as I already merged all the changes before): Command: Merging revisions 1-HEAD of https://dev/svn/trunk into C:\devel, respecting ancestry Completed: C:\devel I'm trying to follow the instructions from here: http://svnbook.red-bean.com/en/1.5/svn.branchmerge.basicmerging.html, but there's nothing about solving such a problem. Any ideas? Perhaps I should just delete the trunk and then make a copy of my branch? But I'm not really sure if it's safe.

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  • div insert in div

    - by lolalola
    Hi, what's wrong with this code? Now disappear background and div after this code show incorrect. But why when i delete "float: left", everything looks good. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <style type="text/css"> #first{ width: 200px; background-color: #345752; } #left_b{ background:transparent url('img/left.png'); background-position: left top; background-repeat: repeat-y; min-height: 30px; } #right_b{ background:transparent url('img/right.png'); background-position: right top; background-repeat: repeat-y; } #text{ float: left; width: 50px; height: 30px; } #text2{ float: left; width: 70px; height: 30px; } </style> </head> <body> <div id = "first"> <div id = "left_b"> <div id = "right_b"> <div id = "text"> text 1 </div> <div id = "text2"> text 2 </div> </div> </div> </div> </body> </html>

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  • Is there something like a "long running offline transaction" for NHibernate or any other ORM?

    - by Vilx-
    In essence this is a followup of this question. I'm beginning to feel that I should give up the whole idea, but I'll give it one more shot. What I want is pretty much like a DB transaction. It should track my changes to the DB and then in the end allow me to either commit or rollback them. If I insert an object, I should get it back in my next (appropriate) SELECT query. If I delete it, future SELECT queries should not return it. Etc. But there is one catch - this transaction would be very long running. It would start when the user opened a form (I'm talking about Windows Forms here), and the commit/rollback would be when the user closed it(with OK/Cancel). So it could take anywhere between seconds and days. This requirement rules out a standard DB transaction because that would lock the tables/rows it touched, and other users wouldn't be able to use the system. Also the transaction should not commit ANY changes to the DB until it was really committed. So if one user makes some changes, others don't see them until OK button is hit. This prevents errors in case the computer crashes or is disconnected from the network. I'm quite OK if the solution puts constraints on my model (I'm using MSSQL 2008, btw). I can design the DB/code any way I like. I'm also fine with the idea that a commit could fail because someone already modified one of the objects my transaction touched. Is there anything like this? I looked at NHibernate.Burrow, but I'm not sure that that's the thing I want. Added: It's the very beginning of the project so I'm not tied to NHibernate. I started out with it but I can still change easily.

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  • Java RMI InitialContext: Equivalent of LocateRegistry.createRegistry(int) ?

    - by bguiz
    I am trying to some pretty basic RMI: // Context namingContext = new InitialContext(); Registry reg = LocateRegistry.createRegistry(9999); for ( int i = 0; i < objs.length; i++ ) { int id = objs[i].getID(); // namingContext.bind( "rmi:CustomObj" + id , objs[i] ); reg.bind( "CustomObj" + id , objs[i] ); } That works without a hitch, but for future purposes, I need to use InitialContext. Context namingContext = new InitialContext(); for ( int i = 0; i < objs.length; i++ ) { int id = objs[i].getID(); namingContext.bind( "rmi:CustomObj" + id , objs[i] ); } But I cannot get this to work. I have started rmiregistry from the command line. Is there an equivalent of LocateRegistry.createRegistry(int)? Or some other way to start the RMI registry / registry used by InitialContext from inside my class? (Instead of the command line) Stack trace: javax.naming.CommunicationException [Root exception is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: bguiz.scratch.network.eg.Student] at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:126) at com.sun.jndi.toolkit.url.GenericURLContext.bind(GenericURLContext.java:208) at javax.naming.InitialContext.bind(InitialContext.java:400) at bguiz.scratch.RMITest.main(RMITest.java:29) Caused by: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: bguiz.scratch.CustomObj at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250) ....(truncated) EDIT: I will delete my own question in a couple of days, as there seems to be no answer to this (I haven't been able to figure it out myself). Last call for any biters!

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  • Declare a Nullable int (int?) using XAML

    - by Nate Zaugg
    I am trying to bind a combo box to a property on my ViewModel. The target type is short? and I would like to have null be an option. Basically I would like the value of the first item in the combo box be {x:Null}. <ComboBox Grid.Row="9" Grid.Column="1" SelectedValue="{Binding Priority}"> <clr:Int16></clr:Int16> <clr:Int16>1</clr:Int16> <clr:Int16>2</clr:Int16> <clr:Int16>3</clr:Int16> <clr:Int16>4</clr:Int16> <clr:Int16>5</clr:Int16> <clr:Int16>6</clr:Int16> <clr:Int16>7</clr:Int16> <clr:Int16>8</clr:Int16> <clr:Int16>9</clr:Int16> <clr:Int16>10</clr:Int16> </ComboBox> Any Suggestions?

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  • How to let m2eclipse use nexus repositories instead of maven one

    - by lisak
    I have this situation: An artifact in maven local repo that I don't want to use anymore. Instead, I want it to be downloaded by maven from proxied nexus remote repository. It's a typical situation cause a lot of artifacts are called just name-SNAPSHOT and the artifact is changing but the name is still the same. Eclipse with m2eclipse is running. I delete the entire directory of the artifact in local maven repo m2eclipse "Reindex local maven repository" - which creates a new nexus index for local maven repo I guess Project - maven Update Dependencies - now m2eclipse should run maven, which doesn't see the artifact in local maven repo, so it uses nexus repositories to download it (expected behavior) Instead, the directory structure in maven local repo is recreated and there is this file: "m2e-lastUpdated.properties" with following inside: local|http\://nexus\:8082/nexus-webapp-1.6.0/content/groups/public|javadoc=1274399332215 local|http\://nexus\:8082/nexus-webapp-1.6.0/content/groups/public|sources=1274399332161 and m2eclipse says Missing artifact net.sourceforge.htmlunit:htmlunit:jar:2.8-SNAPSHOT:compile even though the artifact physically exists here: nexus:8082/nexus-webapp-1.6.0/content/repositories/htmlunit-snapshot/net/sourceforge/htmlunit/htmlunit/2.8-SNAPSHOT/htmlunit-2.8-SNAPSHOT.jar Maven just doesn't use this location at all. Trust me I tried everything, this m2eclipse behavior is terrible.

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  • multiple Perl ` print $cgi->header, <<HTML; .... HTML ` statement gives problem

    - by dexter
    i have something like: #!/usr/bin/perl use strict; use warnings; use CGI::Simple; use DBI; my $cgi = CGI::Simple->new; if ($cgi->param('selid')) { print $cgi->header, <<HTML; <br/>this is SELECT HTML } elsif ($cgi->param('delid')) { print $cgi->header, <<HTML; <b>this is DELETE</b> HTML } elsif ($cgi->param('upid')) { print $cgi->header, <<HTML; <b>this is UPDATE</b> HTML } when i run this i get an error like: Error message: Can't find string terminator " HTML" anywhere before EOF at C:/xampp/htdocs/perl/action.pl line 14. , and when give space between << and HTML; like :print $cgi->header, << HTML; error changes to: Error message: Can't find string terminator " " anywhere before EOF at C:/xampp/htdocs/perl/action.pl line 14. , what would be the reason for this? note: parameters are passed from another page('selid' or 'delid' or 'upid')

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  • gridview whith dropdown extender

    - by Wafaa
    hello, I have gridview with TextBox Template field and DropDownExtender so when user click on the textbox another gridview will appear tha contain List of items and button to add the item to the first gridview. my qusetion is: how can i in the event of button click(which is in the extender gridview) to get the row index of the first gridview(which contain the textbox)? thanks <cc1:DropDownExtender ID="uxItemExtender" runat="server" DropDownControlID="uxItemContainer" TargetControlID="uxItems"></cc1:DropDownExtender> <asp:Panel BackColor="AliceBlue" ID="uxItemContainer" runat="server" ScrollBars="Both" Height="400" Width="200"> <asp:GridView ID="uxItemsView" runat="server" Font-Size="Small" AutoGenerateColumns="false" OnRowDataBound="uxItemsView_RowDataBound"> <Columns> <asp:TemplateField HeaderText="Item Details"> <ItemTemplate> <asp:Label ID="uxItemNameLbl" Text="Name :" runat="server"></asp:Label> <asp:Label ID="uxItemName" runat="server"></asp:Label><br /> <asp:Label ID="uxItemDescriptionLbl" Text="Description :" runat="server"></asp:Label> <asp:Label ID="uxItemDescription" runat="server"></asp:Label><br /> <asp:Label ID="uxItemPriceLbl" Text="Price :" runat="server"></asp:Label> <asp:Label ID="uxItemPrice" runat="server"></asp:Label><br /> <asp:Button ID="uxSelectItem" runat="server" Text="Add Item" OnClick="uxSelectItem_Click" /><br /> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Picture"> <ItemTemplate> <asp:Image ID="uxItemImage" runat="server" Width="45" Height="50" /> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> </asp:Panel> </asp:TemplateField>

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  • Improve speed of own debug visualizer for Delphi 2010

    - by netcodecz
    I wrote Delphi debug visualizer for TDataSet to display values of current row, source + screenshot: http://delphi.netcode.cz/text/tdataset-debug-visualizer.aspx . Working good, but very slow. I did some optimalization (how to get fieldnames) but still for only 20 fields takes 10 seconds to show - very bad. Main problem seems to be slow IOTAThread90.Evaluate used by main code shown below, this procedure cost most of time, line with ** about 80% time. FExpression is name of TDataset in code. procedure TDataSetViewerFrame.mFillData; var iCount: Integer; I: Integer; // sw: TStopwatch; s: string; begin // sw := TStopwatch.StartNew; iCount := StrToIntDef(Evaluate(FExpression+'.Fields.Count'), 0); for I := 0 to iCount - 1 do begin s:= s + Format('%s.Fields[%d].FieldName+'',''+', [FExpression, I]); // FFields.Add(Evaluate(Format('%s.Fields[%d].FieldName', [FExpression, I]))); FValues.Add(Evaluate(Format('%s.Fields[%d].Value', [FExpression, I]))); //** end; if s<> '' then Delete(s, length(s)-4, 5); s := Evaluate(s); s:= Copy(s, 2, Length(s) -2); FFields.CommaText := s; { sw.Stop; s := sw.Elapsed; Application.MessageBox(Pchar(s), '');} end; Now I have no idea how to improve performance.

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  • Android - need UI help/advice

    - by Donal Rafferty
    I have been working on Android for the past couple of months getting to know how various components work. One area I am completely lacking in knowledge is any sort of User Interface or graphical interface creation. As an excercise I have been asked to break down the HTC call screen into what components it contains and rebuild as close as possible. Here is a picture of the HTC call screen: From my understanding the above UI has a custom title bar where "Meteor" and the call time appears. Then the main image in the middle block along with a text view showing the called party, in this case "Voice Mail" and the number. The bottom is then a custom view maybe with three custom buttons used within it. Would I be correct in my above assumptions? So the parts I should look into start programming are a custom title bar and a custom view with three custom buttons to place at the bottom? What layout would be reccomended? I hope this question is seen as relative to Stack Overflow, if it is not then I will delete it. Thanks in advance

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  • NHibernate.Search - async mode

    - by Atul
    Hi, I am using NHibernate Lucene search in my project. Lucene.Net.dll - v - 2.3.1.3 NHibernate.dll - v - 2.1.0.4000 At this point I am trying to use async option for indexing and used following options config.SetProperty(NHibernate.Search.Environment.WorkerExecution, "async"); config.SetProperty(NHibernate.Search.Environment.WorkerThreadPoolSize, "1"); config.SetProperty(NHibernate.Search.Environment.WorkerWorkQueueSize, "5000"); Questions 1) My initial index was not build with this option, when used these settings first time, I had error saying NHibernate.Search.dll not found. When I deleted existing index and then started working, it went fine. Do we need to rebuild indexes whenever we change config settings like above ? 2) How size of index should be interpreted; i.e. initially my index was about 400MB (build over the last few months), which I deleted. Later when I reindexed, the size of index went down to 5MB ! Search appear to be alright after limited testing, but such a change appeared bit scary. Should we delete/rebuild indexes once in a while & is it normal to change this drastically ? 3) Is my above setting is OK ? When I had WorkerThreadPoolSize=5, I once got Dr Watson kind of error. Please advise on best practices of using async configuration for search. Regards, Atul

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  • Python - CSV: Large file with rows of different lengths

    - by dassouki
    In short, I have a 20,000,000 line csv file that has different row lengths. This is due to archaic data loggers and proprietary formats. We get the end result as a csv file in the following format. MY goal is to insert this file into a postgres database. How Can I do the following: Keep the first 8 columns and my last 2 columns, to have a consistent CSV file Add a Column to the file. 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0, img_id.jpg, -50 1, 2, 3, 4, 5, 0,0,0,0,0,0,0,0,0,0,0 img_id.jpg, -50

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  • Help with debugging COM errors? (.mdi to .pdf file conversions using Microsoft Office Document Imagi

    - by RyanW
    I thought I had a working solution for converting .mdi files to PDF using the Microsoft Office Document Imaging object model. The solution is in a Windows Service, but now I'm running into some errors that I'm having trouble tracking down info on. The exception I get is: The server threw an exception. (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT)) System.Runtime.InteropServices.COMException (0x80010105): The server threw an exception. (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT)) at MODI.DocumentClass.Create(String FileOpen) at DocumentStore.Mdi2PDF(String path, String newPath) Then, in the Event Viewer there is the following Application error: Faulting application MyWindowsServiceName.exe, version 1.0.0.0, time stamp 0x4b97f185, faulting module mso.dll, version 12.0.6425.1000, time stamp 0x49d65443, exception code 0xc0000005, fault offset 0x0000bd8e, process id 0xa5c, application start time 0x01cac08cf032914b. Here's the method that is doing the conversion: private int? Mdi2PDF(String path, String newPath) { int? pageCount = null; string tmpTif = Path.GetTempFileName(); MODI.Document mdiDoc = new MODI.Document(); mdiDoc.Create(path); mdiDoc.SaveAs(tmpTif, MODI.MiFILE_FORMAT.miFILE_FORMAT_TIFF_LOSSLESS, MODI.MiCOMP_LEVEL.miCOMP_LEVEL_HIGH); mdiDoc.Close(false); pageCount = Tiff2PDF(tmpTif, newPath); if (File.Exists(tmpTif)) File.Delete(tmpTif); return pageCount; } I removed all threading from the service invoking this, so that only the primary thread was initializing the MODI object, but still got the error, so it doesn't appear to be threading related. I also built a a console apps converting hundreds of documents and DID NOT get the exception. So, it seems to be caused by creating too many instances of the MODI object, but only instantiated within a Service? Doesn't quite make sense. Anybody have any clues about these errors and how to debug them further?

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  • Troubleshooting a COM+ application deadlock

    - by Chris Karcher
    I'm trying to troubleshoot a COM+ application that deadlocks intermittently. The last time it locked up, I was able to take a usermode dump of the dllhost process and analyze it using WinDbg. After inspecting all the threads and locks, it all boils down to a critical section owned by this thread: ChildEBP RetAddr Args to Child 0deefd00 7c822114 77e6bb08 000004d4 00000000 ntdll!KiFastSystemCallRet 0deefd04 77e6bb08 000004d4 00000000 0deefd48 ntdll!ZwWaitForSingleObject+0xc 0deefd74 77e6ba72 000004d4 00002710 00000000 kernel32!WaitForSingleObjectEx+0xac 0deefd88 75bb22b9 000004d4 00002710 00000000 kernel32!WaitForSingleObject+0x12 0deeffb8 77e660b9 000a5cc0 00000000 00000000 comsvcs!PingThread+0xf6 0deeffec 00000000 75bb21f1 000a5cc0 00000000 kernel32!BaseThreadStart+0x34 The object it's waiting on is an event: 0:016> !handle 4d4 f Handle 000004d4 Type Event Attributes 0 GrantedAccess 0x1f0003: Delete,ReadControl,WriteDac,WriteOwner,Synch QueryState,ModifyState HandleCount 2 PointerCount 4 Name <none> No object specific information available As far as I can tell, the event never gets signaled, causing the thread to hang and hold up several other threads in the process. Does anyone have any suggestions for next steps in figuring out what's going on? Now, seeing as the method is called PingThread, is it possible that it's trying to ping another thread in the process that's already deadlocked? UPDATE This actually turned out to be a bug in the Oracle 10.2.0.1 client. Although, I'm still interested in ideas on how I could have figured this out without finding the bug in Oracle's bug database.

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