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• Invalid view state exception in asp.net. do you know any solution?

  - by mmtemporary

  this problem make me crazy! i have asp.net website it raise periodically this error (in IE8): System.Web.HttpException: Invalid viewstate. at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType) at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler .ProcessRequest(HttpContext context) ,... or (in IE6) System.FormatException: Invalid length for a Base-64 char array. at System.Convert.FromBase64String(String s) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) or (in IE7) System.FormatException: Invalid character in a Base-64 string. at System.Convert.FromBase64String(String s) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) i set enableViewStateMac in web.config to false and defined machinekey in my web.config and defined UTF-8 encoding for every page but i received this errors. do you have any solution? best regards

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• Visual Studio 2008 built-in web server needs integrated pipeline mode - How?

  - by jdk

  Using Visual Studio 2008 and built-in web server. In a Web Handler .ashx file public void ProcessRequest(HttpContext context) { context.Response.ContentType = MimeType_text_xvcard; context.Response.Headers.Add(HttpHeader_ContentLength, "2138"); when I try to add an HTTP header I get the exception: This operation requires IIS integrated pipeline mode. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.PlatformNotSupportedException: This operation requires IIS integrated pipeline mode. I can find information about this error on the Internet but need specific info about how to presumably enable Integrated Pipeline mode (through web.config?) to allow HTTP headers to be manipulated. How do do I put the built-in web server into integrated pipeline mode? Note: Not using full-fledged IIS

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• How can I stop IIS7 from using HttpHandlers?

  - by mcintyre321

  I'm having a bit of a play around with IIS7, just trying to catch events manually in global.asax and skip the ASP pipeline entirely. To this end, I've set <httpHandlers> <clear/> </httpHandlers> <httpModules> <clear/> </httpModules> but when I call the server I get a YSOD [HttpException]: No http handler was found for request type 'GET' at System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) at System.Web.HttpApplication.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) What do I need to do to completely prevent IIS from handling things? What I want is just to do Response.Writes in event handlers and async methods set up in HttpApplication.Init

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• Render a user control ascx

  - by Jeremy

  I want to use an ascx as a template, and render it programatically, using the resulting html as the return value of an ajax method. Page pageHolder = new Page(); MyUserControl ctlRender = (MyUserControl)pageHolder.LoadControl(typeof(MyUserControl),null); pageHolder.Controls.Add(ctlRender); System.IO.StringWriter swOutput = new System.IO.StringWriter(); HttpContext.Current.Server.Execute(pageHolder, swOutput, false); return swOutput.ToString(); This all executes, and the Page Load event of the user control fires, but the StringWriter is always empty. I've seen similar code to this in other examples, what am I missing?

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• C# .NET MVC Call an action from another controller

  - by Brian

  I have two different objects: contracts, and task orders. My requirements specify that in order to view the Details for either object, the Url should be "http://.../Contract/Details" or "http://.../TaskOrder/Details" depending on which type. They are both very similar and the details pages are almost identical, so I made a class that can either be a contract or a task order, and has a variable "objectTypeID" that says which type it is. I wrote the action "Details" in the task order controller, but now I want to call that from the contract controller instead of recopying the code. So is there any way to have the url still say ".../Contract/Details" but call the action in the TaskOrder controller instead? I tried using TaskOrderController TOController = new TaskOrderController(); TOController.Details(id); This would have worked except that I can't use the HttpContext.Session anymore, which I used several times in the action.

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• Visual Studio 2008 built-in web server raises integrated pipeline error on Http Header manipulation

  - by jdk

  Using Visual Studio 2008, built-in web server. In a Web Handler .ashx file public void ProcessRequest(HttpContext context) { context.Response.ContentType = MimeType_text_xvcard; context.Response.Headers.Add(HttpHeader_ContentLength, "2138"); when I try to added a header I get the exception This operation requires IIS integrated pipeline mode. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.PlatformNotSupportedException: This operation requires IIS integrated pipeline mode. I can find information about this on the Internet but need specific info about how to work with Integrated Pipeline mode (presumably through web.config?) to allow HTTP headers to be manipulated. Note: I am using the Visual Studio built-in web server instead of full-fledged IIS

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• Server.Transfer("error_404.aspx") in Application_Error returns a blank page

  - by qntmfred

  I look for HttpExceptions in the Application_Error sub of my global.asx Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs) Dim ex As Exception = HttpContext.Current.Server.GetLastError() If ex IsNot Nothing Then If TypeOf (ex) Is HttpUnhandledException Then If ex.InnerException Is Nothing Then Server.Transfer("error.aspx", False) End If ex = ex.InnerException End If If TypeOf (ex) Is HttpException Then Dim httpCode As Integer = CType(ex, HttpException).GetHttpCode() If httpCode = 404 Then Server.ClearError() Server.Transfer("error_404.aspx", False) End If End If End If End Sub I can step through this code and confirm it does hit the Server.Transfer("error_404.aspx"), as well as the Page_Load of error_404.aspx, but all it shows is a blank page.

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• Calling WebService From Same Project

  - by Yehia A.Salam

  Hi, I'm trying to call an asp.net webservice from the same project it's in: [MethodImpl(MethodImplOptions.Synchronized)] public static void OnFileCreated(object source, FileSystemEventArgs e) { trackdata_analyse rWebAnalyse = new trackdata_analyse(); rWebAnalyse.Analyse(@"pending\" + e.Name, "YOUNIVATE"); } However i always get the following "HttpContext is not available. This class can only be used in the context of an ASP.NET request." when calling Server.MapPath from the webservice: [WebMethod] public int Analyse(string fileName, string PARSING_MODULE){ int nRecords; TrackSession rTrackSession = new TrackSession() ; string filePath = Server.MapPath(@"..\data\") + fileName; do i have to add the WebReference instead, though the webservice is in the same project? Thanks In Advance

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• Setting a session variable in Global.asax causes AJAX errors

  - by Fly_Trap

  I'm getting a very peculiar problem with my asp.net application, it took me an age to track down but I still don't know what is causing this behaviour. If I set a session variable in the Application_PreRequestHandlerExecute event, then my external JavaScript files are ignored, and therfore causing a raft of errors. I have simplified the problem below. E.g. I have file called JScript.js containing the code: function myAlert() { alert("Hi World"); } And in my Default.aspx file I reference the js with the code: <script src="JScript.js" type="text/javascript"></script> And in the body onload event I call the myAlert() function: <body onload="myAlert()"> And finally in the Global.asax file: Private Sub Application_PreRequestHandlerExecute(ByVal sender As Object, ByVal e As EventArgs) HttpContext.Current.Session("myVar") = "MyValue" End Sub If you run the Default.aspx file you will see the js function isnt called, however, if you comment out the line of code Global.asax then the external js is called and the function executed when the page loads. Why is this?

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• Accessing a master page from httphandler

  - by vondip

  Hi All, I am developing a small application in asp.net (writing in c#). In my application I am using jquery to perform asynchronous call to the server. I have an http handler that listens in to the requests and does what it needs to do. Problems start when in the handler I need to access information stored in the page , from where the asynchronous call started. When I try this: Page page = HttpContext.Current.Handler as Page; I don't get a page. How else can I access the page itself? Thank you

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• .Net 3.5 Chart Controls Exception

  - by ChrisHDog

  I am using the new free .net chart controls and they appear to work fine when I run the project up in visual studio, but when hitting the same via IIS I get and exception: [HttpException (0x80004005): No http handler was found for request type 'GET'] System.Web.HttpApplication.MapIntegratedHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig, Boolean convertNativeStaticFileModule) +529 System.Web.HttpServerUtility.Execute(String path, TextWriter writer, Boolean preserveForm) +947 [HttpException (0x80004005): Error executing child request for ChartImg.axd.] System.Web.HttpServerUtility.Execute(String path, TextWriter writer, Boolean preserveForm) +4120098 System.Web.UI.DataVisualization.Charting.ChartHttpHandler.EnsureInitialized(Boolean hardCheck) +266 System.Web.UI.DataVisualization.Charting.Chart.GetImageStorageMode() +25 System.Web.UI.DataVisualization.Charting.Chart.Render(HtmlTextWriter writer) +133 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +253 System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +87 System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +53 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Page.Render(HtmlTextWriter writer) +38 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4240 Any idea what I'm doing wrong? Thanks!

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• Impersonation and Delegation

  - by Samuel Kim

  I am using impersonation is used to access file on UNC share as below. var ctx = ((WindowsIdentity)HttpContext.Current.User.Identity).Impersonate(); string level = WindowsIdentity.GetCurrent().ImpersonationLevel); On two Windows 2003 servers using IIS6, I am getting different impersonation levels: Delegation on one server and Impersonation on the other server. This causes issues where I am unable to access the UNC share on the server with 'Impersonation' level. What could be causing this difference? I searched through machine.config and IIS settings for the app pool, site and virtual directories - but aren't able to find the cause of this problem.

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• Deploying web service

  - by baron

  I am trying to build a webservice that manipulates http requests POST and GET. Here is a sample: public class CodebookHttpHandler: IHttpHandler { public void ProcessRequest(HttpContext context) { if (context.Request.HttpMethod == "POST") { //DoHttpPostLogic(); } else if (context.Request.HttpMethod == "GET") { //DoHttpGetLogic(); } } ... public void DoHttpPostLogic() { ... } public void DoHttpGetLogic() { ... } I need to deploy this but I am struggling how to start. Most online references show making a website, but really, all I want to do is respond when an HttpPost is sent. I don't know what to put in the website, just want that code to run. Some links i've tried so far: http://my.execpc.com/~gopalan/dotnet/webservices/webservice_server.html http://www.beansoftware.com/asp.net-tutorials/deploy-asp.net.aspx http://msdn.microsoft.com/en-us/library/6x71sze4%28VS.80%29.aspx http://www.c-sharpcorner.com/UploadFile/rajaduraip/SimplestwaytoCreateNDeployWebServices12232005054219AM/SimplestwaytoCreateNDeployWebServices.aspx

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• asp.net MVC - how to get complete local and global resources

  - by Buthrakaur

  I'm localizing application and need to provide JSON representation of local and global resources for JS part of application for all views. My current idea is I'd implement HtmlHelper extension methods like GetLocalResourcesJSON/GetGlobalResourcesJSON which should encode all resource keys+values and return them JSON encoded as string (I'd implement caching as well). At the moment I'm able to retrieve single specific key from global or local resource belonging to current view (using httpContext.GetGlobalResourceObject/GetLocalResourceObject), but I'm not able to find out how to retrieve whole resource object and iterate all its keys+values. Is there any method how to achieve this? it looks like ResourceProviderFactory could be the the key to this problem, but it's not accessible publicly anywhere. I could instantiate ResourceExpressionBuilder and use reflection to retrieve the provider using GetLocal/GlobalResourceProvider() methods, but I don't like using reflection here at all...

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• Logging extra fields with Elmah Error Table?

  - by VJ

  I want to add my own session variable to elmah error log table and display it. I already have modified the source code and added the new fields to Error.cs and other fields but I don't know but when I assign an HttpContext.Current.Session["MyVar"].tostring() value to my field in the constructor it stops logging exceptions and does not log any exception. I just need to get the value of the session variable is there other way for this. I read a post which he added fields for the email but it does not say where exactly should I get the session value.

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• asp.net root paths

  - by dejavu

  I am getting the exception when trying to save a file: System.Web.HttpException: The SaveAs method is configured to require a rooted path, and the path '~/Thumbs/TestDoc2//small/ImageExtractStream.bmp' is not rooted. at System.Web.HttpPostedFile.SaveAs(String filename) at System.Web.HttpPostedFileWrapper.SaveAs(String filename) at PitchPortal.Core.Extensions.ThumbExtensions.SaveSmallThumb(Thumb image) in C:\Users\Bich Vu\Documents\Visual Studio 2008\Projects\PitchPortal\PitchPortal.Core\Extensions\ThumbExenstions.cs:line 23 the code is below: public static void SaveSmallThumb(this Thumb image) { var logger = Microsoft.Practices.ServiceLocation.ServiceLocator.Current.GetInstance<ILoggingService>(); string savedFileName = HttpContext.Current.Server.MapPath(Path.Combine( image.SmallThumbFolderPath, Path.GetFileName(image.PostedFile.FileName))); try { image.PostedFile.SaveAs(savedFileName); } catch (Exception ex) { logger.Log(ex.ToString()); } } I cant see what is wrong here, any tips?

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• Custom fine-grained claims based authorization system in ASP.NET MVC - wheres and hows

  - by BuzzBubba

  So, I'd like to implement my own custom authorization system in MVC2. If I'd have to create a global class, where do I instantiate it? Can HttpContext be extended with my own additions and where do I do that? Should I use Authorization filters for rights validation or ActionFilters or do it within an action? Can ActionFilter pass any data to the action itself? Previously (in WebForms) I was using a Session object where I would put a serialized object containing essential user data (account id and a list of roles and rights) and I'd extend my own Page class.

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• Separation of concerns and authentication

  - by Tom Gilder

  I'm trying to be a Good Developer and separate my concerns out. I've got an ASP.NET MVC project with all my web code, and a DAL project with all the model code. Sometimes code in the DAL needs to check if the current user is authorized to perform some actions, by checking something like CurrentUser.IsAdmin. For the web site, the current is derived from the Windows username (from HttpContext.Current.User.Identity), but this is clearly a web concern and shouldn't be coupled to the DAL. What's the best pattern to loosely couple the authentication? Should the DAL be asking the MVC code for a username, or the MVC be telling the DAL? Are there advantages or disadvantages to one or the other? Thank you!

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• SQL ConnectionString in global.asax overridden by web.config

  - by rlb.usa

  This is going to sound very odd, but I have a web.config like this: <connectionStrings> <remove name="LocalSqlServer"/> <add name="LocalSqlServer" connectionString="Data Source=BACKUPDB;..." providerName="System.Data.SqlClient"/> </connectionStrings> And a global.asax like this: void Session_Start(object sender, EventArgs e) { // Code that runs when a new session is started if (Application["con"] == null || Application["con"] == "") { Application["con"] = "Data Source=PRODUCTIONDB;..."; } } And EVERYWHERE in my code, I reference my ConnectionStrings like this: SqlConnection con = new SqlConnection(Convert.ToString(HttpContext.Current.Application["con"])); However, I see that everything I do inside this application goes to BACKUP db instead of PRODUCTIONDB. What is going on, how could this happen, and why? It doesn't make any sense to me, and it got me into a lot of trouble. We use LocalSqlServer string for FormsAuthentication.

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• How to receive userinfo with google adwords api libraries

  - by PatrickvKleef

  I'm using the Google Adwords API libraries and I would like to receive the userinfo of the logged in user. I added the userinfo scope as followed: googleAdwordsUser = new AdWordsUser(); string oauth_callback_url = HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Path); googleAdwordsUser.OAuthProvider = new AdsOAuthNetProvider("https://adwords-sandbox.google.com/api/adwords/ https://www.googleapis.com/auth/userinfo.email", oauth_callback_url, Session.SessionID); When the callback url is called, I'm trying to get the users emailaddress, but it isn't working, the error 'The remote server returned an error: (401) Unauthorized.' is thrown. string url = @"https://www.googleapis.com/oauth2/v2/userinfo?access_token=" + token; HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url); objRequest.Method = "GET"; HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse(); string result = string.Empty; using (StreamReader sr = new StreamReader(objResponse.GetResponseStream())) { result = sr.ReadToEnd(); } Does somebody knows how to fix this? Thanks.

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• Clear Session in ASP.Net

  - by Jignesh

  I want to clear the session on Page unload. Here is a condition : If user goes from Page A to Page B of the same site session must not get cleared. If user close the browser window or Tab(close the site),session must gets cleared. I have tried using AJAX PageMethod to call server-side procedure to remove session from client side script.But the procedure is not getting hit,I have checked it using Breakpoint. server side procedure is in master.cs file I will appreciate your help. Here is code in site.master <body onunload="HandleClose();"> <script type="text/javascript"> function HandleClose() { PageMethods.AbandonSessions(); } and here is a code in master.cs : [System.Web.Services.WebMethod] public static void AbandonSessions() { HttpContext.Current.Session.Abandon(); }

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• Getting a scriptmanager into a dynamically rendered page

  - by AndreasKnudsen

  Hi, We are rendering usercontrols dynamically like this: public string RenderControl(string pathcontrol) { string html; var page = new Page(); var control = page.LoadControl(path); page.Controls.Add(control); // do stuff to the control (give it some data to work on) using (var writer = new StringWriter()) { HttpContext.Current.Server.Execute(page, writer, false); html = writer.ToString(); } return html; } This lets us the same user controls when rendering pages normally as we do when rendering responses to ajax calls. However, when adding controls which themselves contain a scriptmanagerProxy we run into the problem that the newed up Page object doesn't contain either a ScriptManager or the HtmlForm in which the ScriptManager needs to run. Is there any way around this? Yours Andreas

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• issue with a xmlns

  - by Josemalive

  Hello, I have an xml file and an xslt file. The xml file has a xmlns="exa:com.test" attribute. If i remove this attribute in the xml the xpath sentences in my xslt works. But if i leave it, doesnt work. Im using the following code to mix xml and xslt: XslCompiledTransform transformer = new XslCompiledTransform(); transformer.Load(HttpContext.Current.Server.MapPath("xslt\\searchresults.xslt")); transformer.Transform(xmlreader, null, utf8stringwriter); What im doing wrong? How could i mix xml and xslt if the xml has the xmlns attribute on top? Thanks in advance. Best Regards. Jose

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• SQL ConnectionString in web.config and global.asax implications

  - by rlb.usa

  This is going to sound very odd, but I have a web.config like this: <connectionStrings> <remove name="LocalSqlServer"/> <add name="LocalSqlServer" connectionString="Data Source=BACKUPDB;..." providerName="System.Data.SqlClient"/> </connectionStrings> And a global.asax like this: void Session_Start(object sender, EventArgs e) { // Code that runs when a new session is started if (Application["con"] == null || Application["con"] == "") { Application["con"] = "Data Source=PRODUCTIONDB;..."; } } And EVERYWHERE in my code, I reference my ConnectionStrings like this: SqlConnection con = new SqlConnection(Convert.ToString(HttpContext.Current.Application["con"])); However, I see that everything I do inside this application goes to BACKUP db instead of PRODUCTIONDB. What is going on, how could this happen, and why? It doesn't make any sense to me, and it got me into a lot of trouble. We use LocalSqlServer string for FormsAuthentication.

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• How to determine the pat of the current web site

  - by Velika2

  I wanted to create a function which would return the path of the current web site. This is what I thought was working while running in the IDE: Public Shared Function WebsiteAbsoluteBaseUrl() As String Dim RequestObject As System.Web.HttpRequest = HttpContext.Current.Request Return "http://" & RequestObject.Url.Host & ":" & _ RequestObject.Url.Port & "/" & _ RequestObject.Url.Segments(1) End Function Does this seem like it should work? Is there a more straight forward way?

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