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• C# where does the dbml file come from?

  - by 5YrsLaterDBA

  Learning C# and learing Linq now. have lots of qestions about it. Basically I need a step by step tutorial. I suppose the dbml file is the configuration file of the database. I double click it and VS will open it with kind of design diagram. I can create/delete/modify table here? I can use add new item to add the Linq to SQL Classes to get a dbml file? what's next? generate tables in database? generate sql script? generate cs files? when? how?

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• How to convert an object into a double?

  - by george t.

  I am working on VS C# on the following code, which converts an user input math expression and computes it. MSScriptControl.ScriptControl sc = new MSScriptControl.ScriptControl(); sc.Language = "VBScript"; sc.ExecuteStatement( "function pi\n" + "pi = 3.14159265\n" + "end function"); sc.ExecuteStatement( "function e\n" + "e = exp(1)\n" + "end function"); expression = textBox1.Text.ToString(); expression = expression.Replace("x", i.ToString()); object y = sc.Eval(expression); string k = y.ToString(); double result = double.Parse(k); While this outputs onto the console with the correct result, I want to use the values to make a graph of the function user inputs and it's not doing it correctly. Thank you for your help.

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• ASP.NET MVC Get a list of users with particular profile properties

  - by Sam Huggill

  Hi, I'm using ASP.NET MVC 1 and I have added a custom Profile class using the WebProfile Builder VS add-in (found here: http://code.msdn.microsoft.com/WebProfileBuilder/Release/ProjectReleases.aspx?ReleaseId=980). On one of my forms I want a drop-down list of all users who share a specific profile value in common. I can see that I can get a list of all users using: Membership.GetAllUsers() However I cannot see how to get all users who have a specific profile value, which in my case is CellId. Am I approaching this in the right way? I have used membership roles to define which users are administrators etc, but profiles seems like the right place to group users. Any pointers both in specifics of how to access the user list but also comments on whether am I pursuing the right avenue here would be greatly appreciated. Many thanks, Sam

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• django + ExtJs - list of example implementations with source code

  - by Tom Tom

  Hi, I want to learn ExtJs http://www.extjs.com/ in combination with Django (I know Django already .. a bit ;-) and I'm on the search of examples I can learn from. I found already this post. Would be great if you post your links to examples here. Maybe we get a nice list of examplary implementations that help users to start with django + ExtJs. Ext js Poll Tutorial Ext js vs. Jquery "Show how you can use extjs to display a table and how to use jqgrid 3.2 to get the same as in extjs. Incluses extjs and jqgird libraries. I have had to patch jqgrid adding" RESTful Web apps with Django, Piston and Ext JS Convert your forms.Form and forms.ModelForm to extjs and handles the form submission like any django form.

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• How to unit test C# Web Service with Visual Studio 2008

  - by Steven Behnke

  How are you supposed to unit test a web service in C# with Visual Studio 2008? When I generate a unit test it adds an actual reference to the web service class instead of a web reference. It sets the attributes specified in: http://msdn.microsoft.com/en-us/library/ms243399(VS.80).aspx#TestingWebServiceLocally Yet, it will complete without executing the test. I attempted to add the call to WebServiceHelper.TryUrlRedirection(...) but the call does not like the target since it inherits from WebService not WebClientProtocol. Thanks, Steven

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• Ruby on Rails: having two xmlbuilder templates per action , one for errors one for regular output

  - by randombits

  What's the best way to handle having two templates (or should it be one, DRY?) for xml builder templates? I'm building a web api with Rails and wanted to see an example of how to have a view that does regular output vs one that does error output. I've been using @obj.to_xml for a while, but my requirements have changed and require me building my own error templates. do you typically have both views in one with a condition above for errors such as app/views/myresource/create.xml.builder unless @myobj.errors.empty? // xml for errors here? end // regular xml view

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• Any software transforming broken lines into curves?

  - by brilliant

  Hello, do you know of any software that would help me transform a broken line into a curved line? For example, I have an octagon or a heptagon and I want it to be transformed into something resembling a circle. if you know such software, please, let me know. Thank You! Update A: Here is an image from the tutorial given to me by Jamie Keeling (right now it's the first answer below). At least the picture there represents what I want. In that tutorial this process is called "flattening paths". I will try to put that image right here, but if it doesn't get displayed, you can find it here: http://msdn.microsoft.com/en-us/library/ms536364%28v=VS.85%29.aspx The red line in the picture is what I would want to submit, and the blue line is what I would want to get in the end:

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• Interface implementation Diferences

  - by carlos

  What is the diference of using interfaces like ... I have an interface Public Interface IProDataSource Function read() As Integer End Interface Then a class Public Class DataSource : Implements IProDataSource Function read() As Integer Implements IProDataSource.read some code... End Function End Class Then I use this the next way ... but what is the difference? ... boths approaches are working ... Dim obj As IProDataSource = New DataSource obj.read() vs Dim datas as new Datasource datas.read() The only difference I have notice is that if the method is declare private it will be visible using the first approach only. Thanks for any comments !!!

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• WPF slow to start on x64 in .NET Framework 4.0

  - by Robert Fraser

  I've noticed that if I build my WPF application for Any CPU/x64, it takes MUCH longer to start (on the order of about 20 seconds) or to load new controls than it does if started on x86 (in release & debug modes, inside or outside of VS). This occurs with even the simplest WPF apps. The problem is discussed in this MSDN thread, but no answer was provided there. This happens only with .NET 4.0 -- in 3.5 SP1, x64 was just as fast as x86. Interestingly, Microsoft seems to know about this problem since the default for a new WPF project in VS2010 is x86. Is this a real bug or am I just doing it wrong? EDIT: Possibly related to this: http://stackoverflow.com/questions/2788215/slow-databinding-setup-time-in-c-net-4-0. I'm using data binding heavily.

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• Why would HTTP transfer via wget be faster than lftp/pget?

  - by jondahl

  I'm building software that needs to do massive amounts of file transfer via both HTTP and FTP. Often times, I get faster HTTP download with a multi-connection download accelerator like axel or lftp with pget. In some cases, I've seen 2x-3x faster file transfer using something like: axel http://example.com/somefile or lftp -e 'pget -n 5 http://example.com/somefile;quit' vs. just using wget: wget http://example.com/somefile But other times, wget is significantly faster than lftp. Strangly, this is even true even when I do lftp with get, like so: lftp -e 'pget -n 1 http://example.com/somefile;quit' I understand that downloading a file via multiple connections won't always result in a speedup, depending on how bandwidth is constrained. But: why would it be slower? Especially when calling lftp/pget with -n 1?

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• Caspol, VMs, Mapped Drives, VS2010

  - by Simon Woods

  Hi I have a VM (Win7 32 bit) with VS2010 installed. I have a drive mapped into it from the host machine (VM 64 bit), when I have some of my VS2010 projects and to where I am building them. One of my projects is looking to load an assembly. If I copy that assembly to a local drive, the program ruins fine. If I leave it on the mapped drive, then I get an error Exception is: FileLoadException - Could not load file or assembly 'file:///Z:\BusinessTier\bin\Debug\BusinessTier.dll I am unsure whether or not I need to run Caspol. There is another post on SO which pointed me to a post which indicated that VS2008 SP1+ removed the need for caspol wrt network drives, but I wondered if I still needed to because I am in a VM. I have tried running the following on the host machine in an attempt to give permissions to VS inside the VM, but to no avail C:\Windows\Microsoft.NET\Framework\v4.0.30128>caspol -m -ag 1.2 -url file://g:\* FullTrust where g:* is the drive being mapped into the VM (as drive z:) What am I missing (apart from understanding!) Thx Simon

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• ClickOnce and mageUI adding custom file folder problems

  - by Leszek Wachowicz

  What I do: Publishing .Net 3.5 application via VS, or msbuild (whatever), and now I need to insert to the published application separate directory (Modules - not added as a reference to the project - our project architecture does not allow this). So I'm copying the folder to published location then runs mageUI.exe select the application manifest and then the problems starts. As I press the populate button it's adding also hidden directory? So I remove the directory, after I want to save the manifest file I get the "Warning MSB3110: Assembly 'NAME.Shell.application.deploy' has mismatched identity 'NAME.Shell.application', expected file name: 'NAME.Shell.application.application'". Did you have the same problems, according to http://smartclient.codeplex.com/Project/Download/FileDownload.aspx?DownloadId=5060 it should be easy as 1-2-3 but it's not.

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• PerformanceCounters on .NET 4.0 & Windows 7

  - by scott

  I have a program that works fine on VS2008 and Vista, but I'm trying it on Windows 7 and VS2010 / .NET Framework 4.0 and it's not working. Ultimately the problem is that System.Diagnostics.PerformanceCounterCategory.GetCategories() (and other PerformanceCounterCategory methods) is not working. I'm getting a System.InvalidOperationException with the message "Cannot load Counter Name data because an invalid index '' was read from the registry." I can reproduce this with the very simple program shown below: class Program { static void Main(string[] args) { foreach (var pc in System.Diagnostics.PerformanceCounterCategory.GetCategories()) { Console.WriteLine(pc.CategoryName); } } } I did make sure I'm running the program as an admin. It doesn't matter if I run it with VS/Debugger attached or not. I don't have another machine with Windows 7 or VS2010 to test it on, so I'm not sure which is complicating things here (or both?). It is Windows 7 x64 and I've tried forcing the app to run in both x32 and x64 but get the same results.

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• SQL Server CE, Visual Studio 2008/2010 RC, and Linq-to-Sql

  - by blu

  I added an .sdf to my project, added a table, added a Linq-to-Sql dmbl, and tried to add the table to the dbml. The result was an error: "The selected object(s) are an unsupported data provider" This happens in both VS 2008 Professional SP1 and 2010 RC Ultimate. I found someone talking about using SQL Metal to generate the file, but I didn't enjoy that 2 years ago, and after a little playing around I recall why. Does anyone know if this is going to be supported in the release version? Should I abandon SQL Server CE and just use SQLite (with DbLinq)? Thanks for any insight.

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• How to refactor large projects in visual studio

  - by Aaron

  I always run into a problem where my projects in Visual Studio (2008) become huge monstrosities and everything is generally thrown into a Web Application project. I know from checking out some open source stuff that they tend to have multiple projects within a solution, each with their own responsibilities. Does anyone have any advice for how to refactor this out? What should be in a separate project vs. part of the web project? Can you point me to any reference materials on the subject, or is it just something you become accustomed to with time?

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• VS2010 add-in custom menu item in files of Solution Explorer

  - by NewProgrammer

  Hey guys, I need to create a custom menu item for Visual Studio 2010 Add-in in C#, but I have had no luck in coming with a solution anytime soon. I am aware that there was a similar post: http://stackoverflow.com/questions/2486818/visual-studio-add-in-adding-a-context-menu-item-to-solution-explorer But it did not help, as the blog follows the process through the integration package, and the video is done through VB. I had attempted to convert the VB syntax to the C# syntax, but about half way through the video, the Add-in methods has significantly changed from 2005 to 2010, as some of the methods have removed or changed. Is there any good tutorials on making a custom menu item on the Solution Explorer in the lastest Visual Studio in C#, and is there a good website that could be used as a reference for looking over the VS add-in API? I've used Microsoft's main website, however it is confusing and wordy, which is difficult to understand and find the methods, properties, or commands that I am looking for. Any help would be appreicated, Thanks in advance.

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• Using a Dependency Injection Container in an enterprise solution with multiple different configurati

  - by KevinT

  Can anyone point me towards some good documentation / code examples on how best to manage the configuration of a DI container in a scenario where you need different configuations sets? We have a layered, distributed application that has multiple entry points (ie; a website, winforms app, office plugin etc). Depending on how you are using the solution (through a UI vs. an automated workflow for example), it needs to be configured slightly differently. We are using Windsor, and it's fluent configuration capabilities.

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• Switch to tab by typing a substring of its name in Visual Studio 2005

  - by Vineus

  Is there a way to navigate between tabs in VS similar to the emacs iswtichb-mode or Firefox ubiquity switch tab mode (https://wiki.mozilla.org/Labs/Ubiquity/Ubiquity_0.1_Author_Tutorial#Switching_Tabs) ? In these apps, you just type a substring of the title of the tab (or buffer for emacs) to switch to this tab. For instance, to switch to a tab named "App_Code/Data/MyProgram.cs", you just invoke the tab switching command and then type "Progr" for instance to list all the tab whose name matches this string, including "MyProgram.cs". It's much easier to switch between tabs this way when you have a lot of documents open and when you now where to go (which is the case in most situation) Thank you !

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• How to provide a fileDownloadName only if the user requests to save the file in ASP.NET MVC?

  - by davekaro

  I've got a controller action that returns a FileResult like this return this.File("file.pdf", "application/pdf"); for the URL "/Download/322" - where 322 is the id of the file. This works great, so that if a user clicks on a link to the PDF - it will open in their web browser as long as they have a PDF plugin installed. But, what if they right-click the link and choose "Save as..."? The browser pops up with the filename as "322." I'd like to have a better filename at this point, by doing something like this: return this.File("file.pdf", "application/pdf", "file.pdf"); But if I change the controller to return like that, then it will always pop up the download box, since MVC is setting the Content-Disposition header to attachment (so I can't embed the file). In summary, can I somehow detect that the user is trying to download the file vs. the file is just being embedded in something on the page?

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• SQL Profiler: Read/Write units

  - by Ian Boyd

  i've picked a query out of SQL Server Profiler that says it took 1,497 reads: EventClass: SQL:BatchCompleted TextData: SELECT Transactions.... CPU: 406 Reads: 1497 Writes: 0 Duration: 406 So i've taken this query into Query Analyzer, so i may try to reduce the number of reads. But when i turn on SET STATISTICS IO ON to see the IO activity for the query, i get nowhere close to one thousand reads: Table Scan Count Logical Reads =================== ========== ============= FintracTransactions 4 20 LCDs 2 4 LCTs 2 4 FintracTransacti... 0 0 Users 1 2 MALs 0 0 Patrons 0 0 Shifts 1 2 Cages 1 1 Windows 1 3 Logins 1 3 Sessions 1 6 Transactions 1 7 Which if i do my math right, there is a total of 51 reads; not 1,497. So i assume Reads in SQL Profiler is an arbitrary metric. Does anyone know the conversion of SQL Server Profiler Reads to IO Reads? See also SQL Profiler CPU / duration unit Query Analyzer VS. Query Profiler Reads, Writes, and Duration Discrepencies

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• Visual Studio 2010 - Export Template menu option grayed out

  - by Jakobud

  In Visual Studio, I want to make a simple C++ project and export it out as a template, so I can use the template to start new projects to save me time. But the Export Template menu option is always grayed out. I've not once been able to click it. Anyone know why? Anyone know how to accomplish what I need (besides the obvious "make a copy of an existing project in explorer")? It seems like project templates should be a no-brainer feature for VS. This seems to be the case for Visual Studio 2005, 2010 (I probably 2008 as well I haven't checked).

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• Visual Studio 2010 Full and ASP.NET MVC 2.0 Template

  - by Daniel

  Hello, I've installed full version (not RC nor Beta) of Visual Studio 2010, a then setup within Web Platform Installer 2.0 announce me that I need to install MVC 2.0, so i did it. When I want to create project "MvcWebApplicationProjectTemplate" in VS I have following message: error: this template attempted to load component assembly 'Microsoft.VisualStudio.Web.Mvc.2.0, Version=10.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. For more information on this problem and how to enable this template, please see documentation on Customizing Project Templates. Any idea how to fix it? Do you think that Web Platform Installer 2.0 might have corrupted this template? Thanks, Daniel

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• I keep getting a "System InvalidOperationException occurred in System Windows Forms dll" error in VB

  - by Heartrent

  I've just started learning VB.NET with VS 9.0; a small application I'm working on keeps returning an "A first chance exception of type System InvalidOperationException occurred in System Windows Forms dll" error from the Immediate Window. The application has almost zero functionality so far, it consists of a menu strip with: File About |Open |Save |Save As |Quit The only code I have written opens an Open File dialog, a Save As dialog, an About window with background sound and an OK button, and the Quit button which exits. Since there is almost no code for me to search through, I can't understand why there would be an error. The program runs just fine when I'm debugging it too.

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• C# Pragma to suppress break on thrown error

  - by Courtney de Lautour

  First off I run my applications with exceptions thrown on any error (handled or not). Second I am using a TypeConverter to convert from a user input string to the actual object. Third TypeConverter offers no TryConvert method so I'm stuck using exceptions for validation, using this rather ugly bit of code here: try { this._newValue = null; #pragma Magic_SuppressBreakErrorThrown System.Exception this._newValue = this.Converter.ConvertFromString(this._textBox.Text); #pragma Magic_ResumeBreakErrorThrown System.Exception this.HideInvalidNotification(); } catch (Exception exception) { if (exception.InnerException is FormatException) { this.ShowInvalidNotification(this._textBox.Text); } else { throw; } } I'm finding it rather distracting to have VS break execution every-time I type the - of -1, or some other invalid character. I could use something similar to this but not all the types I'm converting to have a TryParse method either. I'm hoping there may be some way to disable breaking for the section of code within the try without changing my exception settings.

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• Calling Entity Framework function import from code

  - by Mikey Cee

  So I have a stored procedure called Spr_EventLogCreate defined in my database. I have created a function import in my data model called LogEvent with no return type, and I can see this function in the Model Browser tree at MyModel.edmx MyModel EntityContainer Function Imports LogEvent. I thought I should then be able to call the function in my code as follows: var context = new MyModelEntities(); context.LogEvent(...); But the LogEvent() method is not present. I must be being really stupid here, but how do I call my imported function? Using VS 2008 and EF 3.5.

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