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• C# SqlBulkCopy and Data Entities

  - by KP

  Guys, My current project consists of 3 standard layers: data, business, and presentation. I would like to use data entities for all my data access needs. Part of the functionality of the app will that it will need to copy all data within a flat file into a database. The file is not so big so I can use SqlBulkCopy. I have found several articles regarding the usage of SqlBulkCopy class in .NET. However, all the articles are using DataTables to move data back and forth. Is there a way to use data entities along with SqlBulkCopy or will I have to use DataTables?

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• Suggestions for Single-Page Web Application Design?

  - by DaveDev

  My view is that unless you need to change the basic structure of the user interface, you should not have to reload the page at all for any user interactions. I'd like to approach my next ASP.NET MVC project with this in mind. Can anyone suggest any principles, patterns or practices* I should consider? Excellent book, btw. Still trying to wrap my head around some of the concepts though. I thought a question like this would help link the theory to a practical design. Thanks

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• Minimum permissions to COM Object to Instantiate running as LocalService

  - by Paul Farry

  I'm writing a .NET Service that creates a COM object. If I run the Service as the Logged on user (everything is fine). If I run the Service as LocalSystem, everything is fine. If I run the Service as LocalService, then I get an AccessDeniedException when trying to instantiate the COM Object. I've come up with the following block to grant the necessary permissions and it appears to work correctly, but I wanted to make sure I wasn't missing something regarding the COM rules. Private Sub SetAccessToRockeyRegistry() Using reg As RegistryKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey("CLSID\{EE0680D3-AAC3-446B-AFD7-F9DE2D3E28FB}", True) Dim sec As RegistrySecurity sec = reg.GetAccessControl Dim ar As RegistryAccessRule Dim sid As SecurityIdentifier sid = New SecurityIdentifier(WellKnownSidType.LocalServiceSid, Nothing) ar = New RegistryAccessRule(sid, RegistryRights.ReadKey Or RegistryRights.EnumerateSubKeys Or RegistryRights.QueryValues, AccessControlType.Allow) sec.AddAccessRule(ar) ar = New RegistryAccessRule(sid, RegistryRights.ReadKey Or RegistryRights.EnumerateSubKeys Or RegistryRights.QueryValues, _ InheritanceFlags.ObjectInherit Or InheritanceFlags.ContainerInherit, PropagationFlags.InheritOnly Or PropagationFlags.NoPropagateInherit, AccessControlType.Allow) sec.AddAccessRule(ar) reg.SetAccessControl(sec) End Using End Sub

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• Most wanted feature for C# 4.0 ?

  - by Romain Verdier

  Some blogs on the Internet give us several clues of what C# 4.0 would be made of. I would like to know what do you really want to see in C# 4.0. Here are some related articles: C# 4 tag on Jon Skeet's blog 4 features for C# 4 What do you want in C# 4 Future Focus - I: Dynamic Lookup .NET 4, C# 4 and the DLR Channel 9 also hosts a very interesting video where Anders Hejlsberg and the C# 4.0 design team talk about the upcoming version of the language. I'm particularly excited about dynamic lookup and AST. I hope we would be able to leverage - at some level - the underlying DLR mechanisms from C#-the-static-language. What about you ?

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• 3rd Party Document Management Service

  - by Element

  I am developing an asp.net application that requires users to upload/view various documents. Rather then reinvent the wheel I was thinking about using a 3rd party service like Scribd to handle these documents and integrate it into my app via their API; I really like their ipaper viewer too. My concern is some of these documents will be sensitive data. Even though Scribd's FAQ says they are equipped to handle sensitive information, I am a little hesitant to trust an unpaid service that lacks an SLA. Has anyone used Scribd successfully for a similar task? Or can anyone recommend a better document management service?

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• Web Application Project Deployment VS2010 - Precompile Views

  - by Malcolm Frexner

  Using Visual Studio 2010 Ultimate I created a ASP.NET MVC 2.0 Web Application. I read http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&l=EN-US&k=k%28WEBAPPLICATIONPROJECTS.PACKAGEPUBLISHOVERVIEW%29;k%28TargetFrameworkMoniker-%22.NETFRAMEWORK%2cVERSION%3dV4.0%22%29&rd=true. Its about the new features for Web Application Deployment. I dont see an option to precompile Views. Also I dont see other options that where available in previous version of Web Deployment Project: ie if the web is compiled into a single assembly or into one assembly per page. I had the impression that Application Project Deployment is the scuccessor of Web Deployment Project.. maybe I am wrong about it. How should I precompile views now?

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• A good file path builder library for C#?

  - by Igor Brejc

  System.IO.Path in .NET is notoriously clumsy to work with. In my various projects I keep encountering the same usage scenarios which require repetitive, verbose and thus error-prone code snippets that use Path.Combine, Path.GetFileName, Path.GetDirectoryName, String.Format, etc. Scenarios like: changing the extension for a given file name changing the directory path for a given file name building a file path using string formatting (like "Package{0}.zip") building a path without resorting to using hard-coded directory delimiters like \ (since they don't work on Linux on Mono) etc etc Before starting to write my own PathBuilder class or something similar: is there a good (and proven) open-source implementation of such a thing in C#?

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• How do I stop IIS7 from putting out its own 404 before my MVC app gets a chance to handle it?

  - by Gary McGill

  I have an ASP.NET MVC 2 application, which has an Application_Error event handler in global.asax. In this, I'm detecting the case where the Exception type is HttpException and the HTTP code is 404, and redirecting to my own 404-handling page. This works fine on my Cassini development server, but now I'm trying to move it over to my production server which has IIS7. When I request a non-existent URL, IIS7 is showing its own 404 page, and so far as I can tell, my Application_Error method is never called. How do I fix that?

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• How do i write a sql query with user input and wildcards

  - by acidzombie24

  Usually i write my where statements as WHERE key=@0 then add a param. Now i would like the user to specific a few letters such as 'oat' and would like to stick wildcards around it %oat% which matches 'coating'. So how do i write the query so wildcards are around the user input (the 'seachword'). Now lets take it a step further. I would not like the user to write % so he cannot do blah%ing. Perhaps % is part of the sentence (or it could be flat out illegal but i prefer it be part of the sentence). How do i put my wildcards around a word or sentence and disallow the user from putting the wildcard between his words? (and preferably make % part of the sentence) C# ado.net sql/sqlite

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• Raise event from http listener (Async listener handler)

  - by Sean

  Hello, I have created an simple web server, leveraging .NET HttpListener class. I am using ThreadPool.QueueUserWorkItem() to spawn a thread to listen to incoming requests. Threaded method uses HttpListener.BeginGetContext(callback, listener), and in callback method I resume with HttpListener.EndGetContext() as well as raise an even to notify UI that listener received data. This is the question - how to raise that event? Initially I used ThreadPool: ThreadPool.QueueUserWorkItem(state => ReceivedRequest(httpListenerContext, receivedRequestArgs)); But then started to doubt, maybe it should be a dedicated thread (as appose to waiting for a thread from pool): new Thread(() => ReceivedRequest(httpListenerContext, receivedRequestArgs)).Start(); Thoughts? 10X

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• How to Export Images from an Image List in VS2005?

  - by cbuck12000

  Using Visual Studio 2005, is there a way to export the images in an Image List to individual files on my PC? Using the IDE, I select the Image List and view its properties. In the "Images" property, I launch the Images Collection Editor dialog. I can only add and remove images, but I cannot find a way to export an image that is already in the list. Why? The developer who made the original list has left our company and I need the images for an ASP.NET application (will convert to .jpeg). Thank you for the help!

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• Give style attributes to sub-elements inside a <style> tag?

  - by Giffyguy

  My <style> for thumbnails currently looks like this: <style type="text/css"> img.TN { width: 100%; margin-bottom: 5.294%; cursor: pointer; } </style> This is annoying, because I have to apply this style to every single thumbnail image individually, when there could be any number of them on the screen at any given time. All of the thumbnails are inside a single <div> that groups them together, and I'd like to apply a single style to the <div> that will push the attributes I need down to all of the the <img> elements nested inside, regardless how many thumbnails there are. I'm using ASP.NET 2.0, and CSS 2.0 Does anyone know how to do this? Thanks!

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• Associating Worksheets with their Names using OpenXML SDK 1.0

  - by John Price

  I'm using version 1.0 of Microsoft's OpenXML SDK to do some basic parsing of .xlsx files. I can get and parse the worksheets, and I can get a list of worksheet names, but I cannot for the life of me figure out how to link up what name goes with what worksheet. I understand that an element like <sheet name="My Sheet" sheetId="1" r:id="rId1"/> in the workbook is linked up to a specific worksheet via the relationships defined in xl/_rels.xml, but I can't see where any of the relationship info is exposed in the API. I'm using C#, but any VB.NET examples would be just as helpful. I feel like this should be dead simple, but I can't figure it out. It also looks like it may be more straightforward in v2.0 of the SDK, but upgrading isn't an option at the moment.

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• using second level cache vs pushing objects into the session

  - by AhmetC

  I have some big entities which are frequently accessed in same session. For example, in my application there is a reporting page which consist of dynamically generated chart images. For each chart image on page, client makes requests to corresponding controller and the controller generates images using some entities. I can either use asp.net's session dictionary for "caching" those entities or rely on nhibernate's second level cache support with using cached queries for example. What is your opinion? By the way I will use shared hosting, is second level cache hosting friendly? Thanks.

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• Resolving the metadata token of a generic type parameter

  - by 280Z28

  Is there any way the .NET 4.0 (or earlier) reflection API to resolve a generic type parameter? See the two lines after my ArgumentException comment for my current attempt. [TestMethod] public void TestGenericParameterTokenResolution() { Type genericParameter = typeof(List<>).GetGenericArguments()[0]; Assert.IsTrue(genericParameter.IsGenericParameter); int metadataToken = genericParameter.MetadataToken; // make sure the metadata token is a GenericParam Assert.AreEqual(metadataToken & 0xFF000000, 0x2A000000); Module module = typeof(List<>).Module; // the following both throw an ArgumentException. Type resolvedParameter = module.ResolveType(metadataToken); resolvedParameter = (Type)module.ResolveMember(metadataToken); Assert.AreSame(genericParameter, resolvedParameter); }

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• Converting Microsoft Word Smart Quotes to Straight Quotes

  - by curiousR

  We have a program where the user needs to do a Copy-Paste some content from Microsoft Word into a HTML editor (Visual Studio 2008). That content in the HTML is then used in our confirmation emails. Some of the characters like curly quotes turn into ? on the browser & in our confirmation email. For the browser... I was able to find how to resolve this issue by using jQuery. But for the confirmation email I cannot use JavaScript. I tried this ASP.net / C# code but it hasn't worked for me. if (s.IndexOf('\u201b') -1) s = s.Replace('\u201b', '\''); if (s.IndexOf('\u201c') -1) s = s.Replace('\u201c', '\"'); if (s.IndexOf('\u201d') -1) s = s.Replace('\u201d', '\"'); if (s.IndexOf('\u201e') -1) s = s.Replace('\u201e', '\"'); I would appreciate any help in resolution. Thanks.

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• OutOfMemoryException - out of ideas

  - by Captain Comic

  Hi I have a net Windows service that is constantly throwing OutOfMemoryException. The service has two builds for x86 and x64 Windows. However on x64 it consumes a lot more memory. I have tried profiling it with various memory profilers. But I cannot get a clue what the problem is. The diagnosis - service consumes lot of VMSize. Also I tried to look at performance counters (perfmon.exe). What I can see is that heap size is growing and %GC time is 19%. My application has threads and locking objects, DB connections and WCF interface. See first app in list The link to picture with performance counters view http://s006.radikal.ru/i215/1003/0b/ddb3d6c80809.jpg

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• Custom Application Page does not recognize tagPrefix defined in custom web.config

  - by Hasan Khan

  I have a custom application page integrated in Centeral Administration. My application pages are placed in a subfolder in Template\Admin folder. I placed my own web.config in my subfolder and added tagPrefixes in the control section. However when I open my application page ASP.NET throws the exception that the tag SharePoint:InputFormTextBox was not recognized. What am I doing wrong? Or it doesn't work this way? What can i do to achieve this?

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• Convert/Cast base type to Derived type

  - by user102533

  I am extending the existing .NET framework class by deriving it. How do I convert an object of base type to derived type? public class Results { //Framework methods } public class MyResults : Results { //Nothing here } //I call the framework method public static MyResults GetResults() { Results results = new Results(); //Results results = new MyResults(); //tried this as well. results = CallFrameworkMethod(); return (MyResults)results; //Throws runtime exception } I understand that this happens as I am trying to cast a base type to a derived type and if derived type has additional properties, then the memory is not allocated. When I do add the additional properties, I don't care if they are initialized to null. How do I do this without doing a manual copy?

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• BLOB Reading via IHttpAsyncHandler

  - by shaniirfan

  Hi, I am storing images in SQL Server 2000 database (BLOB type). There is a web page in my ASP.NET application which need to show a lot images to the end user and i want to handle browser's requests for images through a IHttpAsyncHandler. I found a similer post on codeproject "Asynchronous HTTP Handler for Asynchronous BLOB DataReader." But for some reasons, page get freeze upon completion of "BeginProcessRequest" method and "EndProcessRequest" method never get call. Can anyone look at this post and let me know whats wrong in that post? OR what i need to do to complete this task (BLOB Reading via IHttpAsyncHandler)?

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• Reference app relative virtual paths in .css file

  - by bravo9

  Assume I have an "images" folder directory under the root of my application. How can I, from within a .css file, reference an image in this directory using an ASP.NET app relative path. Example: When in development, the path of ~/Images/Test.gif might resolve to /MyApp/Images/Test.gif while, in production, it might resolve to /Images/Test.gif (depending on the virtual directory for the application). I, obviously, want to avoid having to modify the .css file between environments. I know you can use Page.ResolveClientUrl to inject a url into a control's Style collection dynamically at render time. I would like to avoid doing this.

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• How can maintain a SqlConnection open always

  - by Salvador

  How can maintain a SqlConnection (or using another component) open (connected) always during the execution of my .Net app? I need this because my app needs to detect using this commnad exec sp_who2 how many instances of my app are connected to mydatabase, to restrict the access (license control). example A) my app executed from location1 check the number of my apps connected to the sql server using exec sp_who2 if the number of my applications < MaxLicencesConnected then start my app and open a sqlconnection B) my app executed from location2 check the number of my apps connected to the sql server using exec sp_who2 if the number of my applications = MaxLicencesConnected then close my application sorry for my english. thanks in advance.

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• C# - Layout problem on Windows XP professional

  - by Rakib Hasan

  I am developing a C# application with .NET Framework 2.0. The problem is, that on my client's PC, the controls get expanded, layout changes (positions of the controls gets changed), sometimes buttons get missed entirely. It happens even on Forms with 2-3 TextBoxes, 2-3 Buttons and some Labels. I tried a lot of investigations. I tried to show a message in the form's resize event. But it doesn't get called. After digging a bit more, it seemed that in Designer.cs file even though ResumeLayout (false) is being called for the form, but this causes the the expansion/disposition of the controls. My Client is using Windows XP professional on his Dell laptop. He is able to reproduce the issue on other laptops with Windows XP professional. But not in other OSes (like Windows XP Home or Windows Vista). In my desktop with Windows XP professional, it is not reproducible. How can this issue be resolved?

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• MembershipProvider user id

  - by niao

  Greetings, I wrote a custom MembershipProvider for my asp.net mvc application. I get the user as follows: public override MembershipUser GetUser(string username, bool userIsOnline) { using (CPersistanceManager pm = new CPersistanceManager()) { pm.EnsureConnectionOpen(); MembershipUser membershipUser = null; COperator oper = pm.OperatorRepository.Get(username); membershipUser = new MembershipUser(ApplicationName, oper.Username, oper.ROWGUID, oper.Email, string.Empty, string.Empty, oper.IsActive, false, DateTime.Today, DateTime.Today, DateTime.Today, DateTime.Today, DateTime.Today ); return membershipUser; } } how can I then retrieve logged user id (rowguid) in any controller?

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• Registering javascript handler function to handle CollapsiblePanelExtender event

  - by Sergej Andrejev

  I checked my html page generated by asp.net and I can see this line Sys.Application.initialize(); Sys.Application.add_init(function() { $create(AjaxControlToolkit.CollapsiblePanelBehavior, { "ClientStateFieldID":"rptActiveQuotes_ctl01_qcQuote_cpeDetails_ClientState", "CollapseControlID":"rptActiveQuotes_ctl01_qcQuote_imgShowHide", "Collapsed":true, "CollapsedImage":"Images/expandablePlus.gif", "ExpandControlID":"rptActiveQuotes_ctl01_qcQuote_imgShowHide", "ExpandedImage":"Images/expandableMinus.gif", "ImageControlID":"rptActiveQuotes_ctl01_qcQuote_imgShowHide", "id":"rptActiveQuotes_ctl01_qcQuote_cpeDetails" }, null, null, $get("rptActiveQuotes_ctl01_qcQuote_pDetails")); }); I think it's generated from CollapsiblePanelExtender with name cpeDetails. And I see you can pass number of events to it, wich is now null (third argument). What should I do to set add_ended event there?

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