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  • How to import data in SQL Compact Edition?

    - by Peter
    I don't seem to find a tool for it, nor an odbc driver. Thanks UPDATE : I'm aware of the sql scripting possibilities. But than again : how to script a sql 2k table? (not just ddl, but data also?) Of course you can write this all by yourself, but importing data into CE cannot be such a hassle, or can it ? UPDATE2 : I don't seem to be able to choose the right dialect for inserting

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  • SQL Express Edition, SQL Compact Editin and SQLCMD for learning purpose

    - by Mil
    Hi, I want to learn programming in SQL from some SQL tutorial sites of which I heard of here but I need some environment for executing query's. I think I have both SQL CE and SQL EE installed on my computer but I have some doubts about these DBMS and I don't know exactly how to use SQLCMD utility so I hope someone here will have time and will to explain me the following: Since running sqlcmd -S.\sqlexpress at command prompt command gives "1" prompt I assume I have SQL express installed but anyway how can I be sure what I have installed on my machine since I cannot find in installed programs SQL Express Edition name? Can I ship and use database with my C# (VC# Express) application which was created with SQL EE (embedded?)? How can use sqlcmd for learning SQL, that is by issuing commands like create, use, select..., again emphasize is on learning SQL I do not want to run scripts but use interactive command prompt like with MySQL (since I want to use SQL I would pretty much like to avoid graphical tools for DBMS)? Please tell me if you have some other advice regarding as to what should I better use in learning how to program in SQL or should I stick with the above for now. Thanks in advance.

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  • LINQ-to-SQL and SQL Compact - database file sharing problem

    - by Eye of Hell
    Hello. I'm learing LINQ-to-SQL right now and i have wrote a simple application that define SQL data: [Table( Name = "items" )] public class Item { [ Column( IsPrimaryKey = true, IsDbGenerated = true ) ] public int Id; [ Column ] public string Name; } I have launched 2 copy of application connected to the same .sdf file and tested if all database modifications in one application affects another application. But strange thing arise. If i use InsertOnSubmit() and DeleteOnSubmit() in one application, added/removed items are instantly visible in other application via 'select' LINQ queue. But if i try to modify 'Name' field in one application, it is NOT visible in other applicaton until it reconnects the database :(. The test code i use: var Items = from c in db.Items where Id == c.Id select c; foreach( var Item in Items ) { Item.Name = "new name"; break; } db.SubmitChanges(); Can anyone suggest what i'm doing wrong and why InsertOnSubmit()/DeleteOnSubmit works and SubmitChanges() don't?

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  • Issue connecting to SQL Compact Edition on Windows Mobile 6 Emulator

    - by Chad
    I am developing an application for Windows Mobile 6 using an emulator. When I try to open the database connection to the SDF file it is throwing an exception that it is not able to connect or find the file. My questions are: Where on the mobile device is the SDF file supposed to be deployed? Does the SDF file get automatically deployed to the emulator when I build the project (like in then windows forms app) or do I have to do that manually? Any help would be appreciated.

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  • Looking for a fast, compact, streamable, multi-language, strongly typed serialization format

    - by sanity
    I'm currently using JSON (compressed via gzip) in my Java project, in which I need to store a large number of objects (hundreds of millions) on disk. I have one JSON object per line, and disallow linebreaks within the JSON object. This way I can stream the data off disk line-by-line without having to read the entire file at once. It turns out that parsing the JSON code (using http://www.json.org/java/) is a bigger overhead than either pulling the raw data off disk, or decompressing it (which I do on the fly). Ideally what I'd like is a strongly-typed serialization format, where I can specify "this object field is a list of strings" (for example), and because the system knows what to expect, it can deserialize it quickly. I can also specify the format just by giving someone else its "type". It would also need to be cross-platform. I use Java, but work with people using PHP, Python, and other languages. So, to recap, it should be: Strongly typed Streamable (ie. read a file bit by bit without having to load it all into RAM at once) Cross platform (including Java and PHP) Fast Free (as in speech) Any pointers?

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  • Text Fade Effect in .NET Compact Framework

    - by Biju
    Hi all, I am creating a windows mobile application where i would like to do a fade In / Fade out of text which is getting displayed on a form. I am using C# for this purpose. Anyone can provide idea on this part? Thanks in Advance Regards Biju

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  • Is this valid JFS partition?

    - by Coolmax
    This is my first question on StackExchange. My teacher gave my his laptop (with Fedora 16 on it) and compact flash card with data. He want to have access to files on card, but he couldn't get access to it. The problem is Linux don't know what type of partion is. I suppose there is JFS: root@debian:~# dmesg |grep sdc [ 9066.908223] sd 3:0:0:1: [sdc] 3940272 512-byte logical blocks: (2.01 GB/1.87 GiB) [ 9066.962307] sd 3:0:0:1: [sdc] Write Protect is off [ 9066.962310] sd 3:0:0:1: [sdc] Mode Sense: 03 00 00 00 [ 9066.962312] sd 3:0:0:1: [sdc] Assuming drive cache: write through [ 9067.028420] sd 3:0:0:1: [sdc] Assuming drive cache: write through [ 9067.028637] sdc: unknown partition table [ 9067.097065] sd 3:0:0:1: [sdc] Assuming drive cache: write through [ 9067.097281] sd 3:0:0:1: [sdc] Attached SCSI removable disk and some of data: root@debian:~# hexdump -Cn 65536 /dev/sdc 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00008000 4a 46 53 31 01 00 00 00 48 63 0e 00 00 00 00 00 |JFS1....Hc......| 00008010 00 10 00 00 0c 00 03 00 00 02 00 00 09 00 00 00 |................| 00008020 00 20 00 00 00 09 20 10 02 00 00 00 00 00 00 00 |. .... .........| 00008030 04 00 00 00 26 00 00 00 02 00 00 00 24 00 00 00 |....&.......$...| 00008040 41 03 00 00 16 00 00 00 00 02 00 00 a0 cc 01 00 |A...............| 00008050 37 00 00 00 69 cc 01 00 b6 d8 ac 4b 00 00 00 00 |7...i......K....| 00008060 32 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 |2...............| 00008070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00008080 00 00 00 00 00 00 00 00 90 15 e5 5f e3 c4 45 fa |..........._..E.| 00008090 9d 6a 5c b5 4f da 62 1a 00 00 00 00 00 00 00 00 |.j\.O.b.........| 000080a0 00 00 00 00 00 00 00 00 c3 c9 01 00 ed 81 00 00 |................| 000080b0 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000080c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * [cut] * 0000f000 4a 46 53 31 01 00 00 00 48 63 0e 00 00 00 00 00 |JFS1....Hc......| 0000f010 00 10 00 00 0c 00 03 00 00 02 00 00 09 00 00 00 |................| 0000f020 00 20 00 00 00 09 20 10 00 00 00 00 00 00 00 00 |. .... .........| 0000f030 04 00 00 00 26 00 00 00 02 00 00 00 24 00 00 00 |....&.......$...| 0000f040 41 03 00 00 16 00 00 00 00 02 00 00 a0 cc 01 00 |A...............| 0000f050 37 00 00 00 69 cc 01 00 b6 d8 ac 4b 00 00 00 00 |7...i......K....| 0000f060 32 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 |2...............| 0000f070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 0000f080 00 00 00 00 00 00 00 00 90 15 e5 5f e3 c4 45 fa |..........._..E.| 0000f090 9d 6a 5c b5 4f da 62 1a 00 00 00 00 00 00 00 00 |.j\.O.b.........| 0000f0a0 00 00 00 00 00 00 00 00 c3 c9 01 00 ed 81 00 00 |................| 0000f0b0 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 0000f0c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00010000 I'm total newbie to filesystems. I googled and found that JFS superblock may starts on 0x8000 offset. But what next? How to mount this card? If there would be normal partition table I would expect 55 AA on 510th and 511th byte, but first 8000 bytes are clear. Any help would be greatly appreciated. And sorry for my bad english :) Kind regards.

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  • .net compact framework backward compatibility 3.5 and 2.0

    - by mack369
    Do I need to install .net 2.0 on the device, where .net 3.5 is installed? So far my application works on .net 2.0 (which potentially should be faster) but the long term plan is to port it to .net 3.5. I need to order devices and the OEM needs to know which version of .net should be add to Windows CE image (version 5.0). Shall I ask him to add both .net 2.0 and .net 3.5 ?

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  • Compact data structure for storing a large set of integral values

    - by Odrade
    I'm working on an application that needs to pass around large sets of Int32 values. The sets are expected to contain ~1,000,000-50,000,000 items, where each item is a database key in the range 0-50,000,000. I expect distribution of ids in any given set to be effectively random over this range. The operations I need on the set are dirt simple: Add a new value Iterate over all of the values. There is a serious concern about the memory usage of these sets, so I'm looking for a data structure that can store the ids more efficiently than a simple List<int>or HashSet<int>. I've looked at BitArray, but that can be wasteful depending on how sparse the ids are. I've also considered a bitwise trie, but I'm unsure how to calculate the space efficiency of that solution for the expected data. A Bloom Filter would be great, if only I could tolerate the false negatives. I would appreciate any suggestions of data structures suitable for this purpose. I'm interested in both out-of-the-box and custom solutions. EDIT: To answer your questions: No, the items don't need to be sorted By "pass around" I mean both pass between methods and serialize and send over the wire. I clearly should have mentioned this. There could be a decent number of these sets in memory at once (~100).

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  • DirectShowNet for Compact framework licensing?

    - by GameTrainersWTF
    http://directshownetcf.com/ I can't seem to find anything on google to suggest whether or not i can use this in a commercial application. It does reference you can buy the source code for money, but nothing (that i can see) about using the already compiled dll. Has anyone got any information on this?

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  • More compact layout

    - by Jesse Aldridge
    In the following code, I'd like to get rid of the margin around the buttons. I'd like to have the buttons stretch all the way to the edge of the frame. How can I do that? import sys from PyQt4.QtGui import * from PyQt4.QtCore import * app = QApplication(sys.argv) window = QWidget() layout = QVBoxLayout() layout.setSpacing(0) window.setLayout(layout) for i in range(2): layout.addWidget(QPushButton()) window.show() app.exec_()

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  • SQL Server Compact Edition 3.5 performance

    - by Wili
    I am using SQL Server CE 3.5 SP1 in one of my client applications. When a user loads the program and starts using it, performance is fine. If the user lets the program sit idle for a while, it takes a considerable amount of time (10 or more seconds) for the program to respond. Every time the user asks for a new screen, a call is made to the SQL CE database to get the data for that screen. It seems like the hard drive may be going to sleep and then when the database is accessed, the hard drive has to wake back up. Is it possible to load the entire database into memory and work from that? Are there any other suggestions on how to increase performance?

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  • More compact way to do this?

    - by Macha
    I have a couple of functions that loop around the surrounding cells of a cell. The grid is contained inside an array. In my code, I have checks to make sure it's not one of the edge cells, as checking an undefined cell causes an error. As such, I have code like this: if(x > 0) { var firstX = x - 1; } else { var firstX = x; } if(x < 199) { var lastX = x + 1; } else { var lastX = x; } if(y > 0) { var firstY = y - 1; } else { var firstY = y; } if(y < 199) { var lastY = y + 1; } else { var lastY = y; } A lot of lines of code to do very little. Is there a more elegant way to do this?

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  • Help catching AV with WinDbg and ADPlus 7.0

    - by Stoune
    I want to catch Memory Access Violation in SQL Server Compact Edition like this described at http://debuggingblog.com/wp/2009/02/18/memory-access-violation-in-sql-server-compact-editionce/ The suggested config is: CRASH Quiet MyApp.exe NoDumpOnFirstChance clr;av FullDump gn I download latest Debugging Tools and observe what Microsoft rewrite adplus tool into managed code and change syntax of config File. I rewrite config file like this: <ADPlus Version="2"> <Settings> <RunMode>Crash</RunMode> <Option>Quiet</Option> <Option>NoDumpOnFirst</Option> <Sympath>c:\symbols\</Sympath> <OutputDir>c:\work\output\</OutputDir> <ProcessName>c:\work\app\output\MyApp.exe</ProcessName> </Settings> <Exceptions><!--to get the full dump on clr access violation--> <Exception Code="clr;av"> <Actions1>FullDump</Actions1> <ReturnAction1>gn</ReturnAction1> </Exception> </Exceptions> </ADPlus> And I get error "Couldn't find exception with code: clr;av". If I understand right It didn't load sos extension, but I can't find the right section and syntax that I should use to load it. adplus_old.vbs - for some reasons didn't launch process on Windows 7. WinDBG 6.12.0002.633 X86 ADPlus Engine Version: 7.01.002 02/27/2009 Maybe someone has a working example of config of debugging .NET app with latest adplus.exe?

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  • C# Windows Mobile 6.5 and TCP connections

    - by Phillip
    Hello, I am developing an application which makes a TCP connection out to our company server to pull down data and provide real-time data updates when the information changes. I am using the .NET Compact Framework for the development and the .NET Framework 3.5 (soon to update to 4.0) for the server-side TCP connection. I want to leave the connection open after the initial data is sent to the device from the server in order to keep the server in contact with the device should data updates need to be sent to the device. We already considered doing a WCF or connect/disconnect type of connection but we believe the overhead on the server for creating the session, transmitting and session cleanup would be unacceptable. (each device would be connecting every 60-90 seconds.) So, leaving the connection open is the best option. What I need to know is, when I leave the TCP connection open, do I need to manually transmit a heartbeat (and if so how do I do that with the .NET Compact Framework) or will the framework/stack do that for me? We have code that allows up to reconnect if the device gets disconnected (from network switching or a voice call) so that is handled. Thanks,

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  • SQL CE: Limiting rows returned in the query

    - by Diakonia7
    In SQL Compact Edition 3.5 , note that it is the Compact Edition I am talking about- Is there a way to limit the amount of rows to only 2? Something like using LIMIT or TOP. I really don't want to use anything with a SqlCEDataReader, or SqlCEResultSet. I want to do all the limiting in the query. Is this possible now? I have looked around and it doesn't seem so. EDIT- In response to Dave Swersky's request for data and using Min()/Max() on some columns as a means to get the top 2 lines, here is some sample (sterilized) data: Line Site Function Status 1010 Las Vegas new 4 1020 DC send 1 1030 Portland copy 1 1040 SF copy 1 1050 Portland copy 1 1060 DC send 1 *There are more columns than this but these are the significant ones. Sorry for the lack of intuitive data (but the actual data is even less intuitive!), but for security i need to change the data. So- i need to determine: what site the record was at in the preceding line to determine where it needs to be picked up. The site on any given line (except the first line with function = 'new') corresponds to where the item is going next. So simply grabbing that site off the same line wont tell me where it came from. The status will always be 1 or 4. The 4 corresponds to a where it has been delivered already and so i dont want to include those records in the result. But it might be useful in getting the pickup site. For this table of data i want the query to return the site corresponding to the line just above the first line with status 1. So- for this it would be Las Vegas.

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  • How to flush DNS cache in Windows Mobile programmatically?

    - by Bounded
    Hello, My windows mobile application (written in C# with the compact framework) needs to know if a particular machine is active or not. To achieve this goal, I thought to use a ping mechanism. I tried to use the Ping class implemented in the opennetcf framework (the System.Net.NetworkInformation.Ping class for the .NET Framework is not part of the compact framework). Because I give to the Ping.Send function a host name, it first tries to resolve this host name and to retrieve an IP address. But i observe the following problem : If the first dns resolution fails (because the network is down at this moment), and if the application tries immediately again to send the ping, it fails too, even if the network is note down anymore. I check with a famous network protocol analyzer and i saw that only the requests concerning the first dns resolution are sent. The requests concerning the dns resolution of the second ping are not sent. Why is the second dns request not sent ? Is there any dns cache mechanism on such Windows Mobile devices ? If yes, can this mechanism beeing flushed programmatically ? EDIT : I gave up finding a solution to this DNS flush. I chose to ping an IP adress instead of a name machine. The problem of pinging an hard coded adress IP is that we have to be 100% sure that this IP will not change. The gateway IP can be used because it's always reachable (if it does not, it means the network is down).

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