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• Call for Abstracts Now Open for Microsoft ASP.NET Connections (Closing April 26)

  - by plitwin

  We are putting out a call for abstracts to present at the Fall 2010 Microsoft ASP.NET Connections conference in Las Vegas, Nov 9-13 2009. The due date for submissions is April 26, 2010. For submitting sessions, please use this URL: http://www.deeptraining.com/devconnections/abstracts Please keep the abstracts under 200 words each and in one paragraph. No bulleted items and line breaks, and please use a spell-checker. Do not email abstracts, you need to use the web-based tool to submit them. Please submit at least 3 abstracts, but it would help your chances of being selected if you submitted 5 or more abstracts. Also, you are encouraged to suggest all-day pre or post conference workshops as well. We need to finalize the conference content and the tracks layout in just a few short weeks, so we need your abstracts by April 26th. No exceptions will be granted on late submissions! Topics of interest include (but are not limited to):* ASP.NET Webforms* ASP.NET AJAX* ASP.NET MVC* Dynamic Data* Anything else related to ASP.NET For Fall 2010, we are having a seperate Silverlight conference where you can submit abstracts for Silverlight and Windows 7 Phone Development. In fact, you can use the same URL to submit sessions to Microsoft ASP.NET Connections, Silverlight Connections, Visual Studio Connections, or SQL Server Connections. The URL again is:http://www.deeptraining.com/devconnections/abstracts Please realize that while we want a lot of the new and the cool, it's also okay to propose sessions on the more mundane "real world" stuff as it pertains to ASP.NET. What you will get if selected:* $500 per regular conference talk.* Compensation for full-day workshops ranges from $500 for 1-20 attendees to $2500 for 200+ attendees.* Coach airfare and hotel stay paid by the conference.* Free admission to all of the co-located conferences* Speaker party* The adoration of attendees* etc. Your continued suport of Microsoft ASP.NET Connections and the other DevConnections conferences is appreciated. Good luck and thank you,Paul LitwinMicrosoft ASP.NET Conference Chair

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• ASP.NET/.NET: Method to determine whether string is or contains HTML entity

  - by ChrisIsTheBomb

  Is there a method anywhere in the .NET framework or System.Web that will tell me whether a string contains an HTML or is one? Should I just Server.HtmlEncode(myString) and see if its length is longer than myString's length before encoding?

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• ASP.NET WebForms vs MVC [after VS2010/.NET 4.0 announcement]

  - by fjxx

  Two of the biggest advantages of MVC over webforms were non-existent viewstate and URL routing. VS2010 and .NET 4.0 incorporates built-in URL routing for Webforms as well as better control for viewstate. I advocate use of MVC for extranet sites due to the MVC design pattern and its general lightweight nature but in light of this new announcement has Webforms closed the gap? Why would you still pick MVC over Webforms? Thanks

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• tigra calendar and asp.net help, or using javascript in asp.net

  - by MyHeadHurts

  <input type="text" name="testinput" /> <script language="JavaScript"> new tcal ({ // form name 'formname': 'testform', // input name 'controlname': 'testinput' }); </script> <form id="form2" runat="server"> <div style="height: 897px"> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <br /> <asp:Button ID="Button1" runat="server" Text="Update" Width="122px" /> <br /> <br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> TESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTESTTEST<br /> aaaaaaaaaaaaaaaaaaaaaaaa<br /> <br /> <br /> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:GridView ID="GridView2" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" Height="147px" Width="694px"> <RowStyle BackColor="#E3EAEB" /> <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" /> <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" /> <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" /> <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" /> <EditRowStyle BackColor="#7C6F57" /> <AlternatingRowStyle BackColor="White" /> </asp:GridView> <br /> <br /> <asp:TextBox ID="TextBox1" runat="server" Height="33px" Width="179px">fsafasfa</asp:TextBox> </ContentTemplate> </asp:UpdatePanel> </div> </form> I am using tigra calender in an asp.net page, but the datepicker will not show up. The img folder path is the same and i even placed it in my apdata. I took the code straight from the sample page, and I have even used tigra calender before, but not with asp.net any ideas. Is there another calender tool i should be using?

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• Returning date from Stored procedure in ASP.Net/VB.Net

  - by Mo

  Hi, I want to execute a method on VB.Net to return a date which is in the stored procedure. I tried using ExecuteScalar but it doesnt work it retruns error 'Implicit conversion from data type datetime to int is not allowed. Use the CONVERT function to run this query' Any help would be much appreciated please? thank you below is the code Public Function GetHolidaydate(ByVal struserID as String) As DateTime Dim objArgs1 As New clsSQLStoredProcedureParams objArgs1.Add("@userID", Me.Tag) objArgs1.Add("@Date", 0, 0, ParameterDirection.Output) Return (CDate(ExecuteScalar(clsLibrary.MyStoredProcedure.GetHolidayDate, objArgs1))) End Function

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• Looking for RESTful Suggestions In Porting ASP.NET to MVC.NET

  - by DaveDev

  I've been tasked with porting/refactoring a Web Application Platform that we have from ASP.NET to MVC.NET. Ideally I could use all the existing platform's configurations to determine the properties of the site that is presented. Is it RESTful to keep a SiteConfiguration object which contains all of our various page configuration data in the System.Web.Caching.Cache? There are a lot of settings that need to be loaded when the user acceses our site so it's inefficient for each user to have to load the same settings every time they access. Some data the SiteConfiguration object contains is as follows and it determines what Master Page / site configuration / style / UserControls are available to the client, public string SiteTheme { get; set; } public string Region { private get; set; } public string DateFormat { get; set; } public string NumberFormat { get; set; } public int WrapperType { private get; set; } public string LabelFileName { get; set; } public LabelFile LabelFile { get; set; } // the following two are the heavy ones // PageConfiguration contains lots of configuration data for each panel on the page public IList<PageConfiguration> Pages { get; set; } // This contains all the configurations for the factsheets we produce public List<ConfiguredFactsheet> ConfiguredFactsheets { get; set; } I was thinking of having a URL structure like this: www.MySite1.com/PageTemplate/UserControl/ the domain determines the SiteConfiguration object that is created, where MySite1.com is SiteId = 1, MySite2.com is SiteId = 2. (and in turn, style, configurations for various pages, etc.) PageTemplate is the View that will be rendered and simply defines a layout for where I'm going to inject the UserControls Can somebody please tell me if I'm completely missing the RESTful point here? I'd like to refactor the platform into MVC because it's better to work in but I want to do it right but with a minimum of reinventing-the-wheel because otherwise it won't get approval. Any suggestions otherwise? Thanks

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• ASP.NET MVC tries to load older version of Owin assembly

  - by d_mcg

  As a bit of context, I'm developing an ASP.NET MVC 5 application that uses OAuth-based authentication via Microsoft's OWIN implementation, for Facebook and Google only at this stage. Currently (as of v3.0.0, git-commit 4932c2f), the FacebookAuthenticationOptions and GoogleOAuth2AuthenticationOptions don't provide any property to force Facebook nor Google respectively to reauthenticate users (via appending the appropriate query string parameters) when signing in. Initially, I set out to override the following classes: FacebookAuthenticationOptions GoogleOAuth2AuthenticationOptions FacebookAuthenticationHandler (specifically AuthenticateCoreAsync()) GoogleOAuth2AuthenticationHandler (specifically AuthenticateCoreAsync()) yet discovered that the ~AuthenticationHandler classes are marked as internal. So I pulled a copy of the source for the Katana project (http://katanaproject.codeplex.com/) and modified the source accordingly. After compiling, I found that there are several dependencies that needed updating in order to use these updated assemblies (Microsoft.Owin.Security.Facebook and Microsoft.Owin.Security.Google) in the MVC project: Microsoft.Owin Microsoft.Owin.Security Microsoft.Owin.Security.Cookies Microsoft.Owin.Security.OAuth Microsoft.Owin.Host.SystemWeb This was done by replacing the existing project references to the 3.0.0 versions and updating those in web.config. Good news: the project compiles successfully. In debugging, I received an exception on startup: An exception of type 'System.IO.FileLoadException' occurred in [MVC web assembly].dll but was not handled in user code Additional information: Could not load file or assembly 'Microsoft.Owin.Security, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) The underlying exception indicated that Microsoft.AspNet.Identity.Owin was trying to load v2.1.0 of Microsoft.Owin.Security when calling app.UseExternalSignInCookie() from Startup.ConfigureAuth(IAppBuilder app) in Startup.Auth.cs. Unfortunately that assembly (and its other dependency, Microsoft.AspNet.Identity.Owin) aren't part of the Project Katana solution, and I can't find any accessible repository for these assemblies online. Are the Microsoft.AspNet.Identity assemblies open source, like the Katana project? Is there a way to fool those assemblies to use the referenced v3.0.0 assemblies instead of v2.1.0? The /bin folder contains the 3.0.0 versions of the Owin assemblies. I've upgraded the NuGet packages for Microsoft.AspNet.Identity.Owin, and this is still an issue. Any ideas on how to resolve this issue?

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• Html.DropDownListFor<> and complex object in ASP.NET MVC2

  - by dagda1

  Hi, I am looking at ASP.NET MVC2 and trying to post a complex object using the new EditorFor syntax. I have a FraudDto object that has a FraudCategory child object and I want to set this object from the values that are posted from the form. Posting a simple object is not a problem but I am struggling with how to handle complex objects with child objects. I have the following parent FraudDto object whcih I am binding to on the form: public class FraudDto { public FraudCategoryDto FraudCategory { get; set; } public List<FraudCategoryDto> FraudCategories { get; private set; } public IEnumerable<SelectListItem> FraudCategoryList { get { return FraudCategories.Select(t => new SelectListItem { Text = t.Name, Value = t.Id.ToString() }); } The child FraudCategoryDto object looks like this: public class FraudCategoryDto { public int Id { get; set; } public string Name { get; set; } } On the form, I have the following code where I want to bind the FraudCategoryDto to the dropdown. The view is of type ViewPage: <td class="tac"> <strong>Category:</strong> </td> <td> <%= Html.DropDownListFor(x => x.FraudCategory, Model.FraudTypeList)%> </td> I then have the following controller code: [HttpPost] public virtual ViewResult SaveOrUpdate(FraudDto fraudDto) { return View(fraudDto); } When the form is posted to the server, the FraudCategory property of the Fraud object is null. Are there any additional steps I need to hook up this complex object? Cheers Paul

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• JavaScript keeps returning ambigious error (in ASP.NET MVC 2.0)

  - by Erx_VB.NExT.Coder

  this is my function (with other lines ive tried/abandoned)... function DoClicked(eNumber) { //obj.style = 'bgcolor: maroon'; var eid = 'cat' + eNumber; //$get(obj).style.backgroundColor = 'maroon'; //var nObj = $get(obj); var nObj = document.getElementById(eid) //alert(nObj.getAttribute("style")); nObj.style.backgroundColor = 'Maroon'; alert(nObj.style.backgroundColor); //nObj.setAttribute("style", "backgroundcolor: Maroon"); }; This error keeps getting returned even after the last line in the function runs: Microsoft JScript runtime error: Sys.ArgumentUndefinedException: Value cannot be undefined. Parameter name: method this function is called with an "OnSuccess" set in my Ajax.ActionLink call (ASP.NET MVC)... anyone any ideas on this? i have these referenced... even when i remove the 'debug' versions for normal versions, i still get an error but the error just has much less information and says 'b' is undefined (probably a ms js library internal variable)... <script src="../../Scripts/MicrosoftAjax.debug.js" type="text/javascript"></script> <script src="../../Scripts/MicrosoftMvcValidation.debug.js" type="text/javascript"></script> <script src="../../Scripts/MicrosoftMvcAjax.debug.js" type="text/javascript"></script> <script src="../../Scripts/jquery-1.4.1.js" type="text/javascript"></script> also, this is how i am calling the actionlink method: Ajax.ActionLink(item.CategoryName, "SubCategoryList", "Home", New With {.CategoryID = item.CategoryID}, New AjaxOptions With {.UpdateTargetId = "SubCat", .HttpMethod = "Post", .OnSuccess = "DoClicked(" & item.CategoryID.ToString & ")"}, New With {.id = "cat" & item.CategoryID.ToString})

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• Serializing Complex ViewModel with Json.Net Destabilization Error on Latest Version

  - by dreadlocks1221

  I just added the latest Version of JSON.Net and I get the System.Security.VerificationException: Operation could destabilize the runtime error when trying to use a controller (while running the application). I read in other posts that this issue should have been fixed in release 6 but I still have the problem. I even added *Newtonsoft.* to the ignore modules in the intellitrace options, which seems to have suppressed the error, but the post will just run forever and not return anything. Any help I can get would be greatly appreciated. [HttpPost] public string GetComments(int ShowID, int Page) { int PageSize = 10; UserRepository UserRepo = new UserRepository(); ShowCommentViewModel viewModel = new ShowCommentViewModel(); IQueryable<Comment> CommentQuery = showRepository.GetShowComments(ShowID); var paginatedComments = new PaginatedList<Comment>(CommentQuery, Page, PageSize); viewModel.Comments = new List<CommentViewModel>(); foreach (Comment comment in CommentQuery.Take(10).ToList()) { CommentViewModel CommentModel = new CommentViewModel { Comment = comment, PostedBy = UserRepo.GetUserProfile(comment.UserID) }; IQueryable<Comment> ReplyQuery = showRepository.GetShowCommentReplies(comment.CommentID); int ReplyPage = 0; var paginatedReplies = new PaginatedList<Comment>(ReplyQuery, ReplyPage, 3); CommentModel.Replies = new List<ReplyModel>(); foreach (Comment reply in ReplyQuery.Take(3).ToList()) { ReplyModel rModel = new ReplyModel { Reply = reply, PostedBy = UserRepo.GetUserProfile(reply.UserID) }; CommentModel.Replies.Add(rModel); } CommentModel.RepliesNextPage = paginatedReplies.HasNextPage; CommentModel.RepliesPeviousPage = paginatedReplies.HasPreviousPage; CommentModel.RepliesTotalPages = paginatedReplies.TotalPages; CommentModel.RepliesPageIndex = paginatedReplies.PageIndex; CommentModel.RepliesTotalCount = paginatedReplies.TotalCount; viewModel.Comments.Add(CommentModel); } viewModel.CommentsNextPage = paginatedComments.HasNextPage; viewModel.CommentsPeviousPage = paginatedComments.HasPreviousPage; viewModel.CommentsTotalPages = paginatedComments.TotalPages; viewModel.CommentsPageIndex = paginatedComments.PageIndex; viewModel.CommentsTotalCount = paginatedComments.TotalCount; return JsonConvert.SerializeObject(viewModel, Formatting.Indented); }

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• [Asp.Net MVC] Encoding a character

  - by Trimack

  Hi, I am experiencing some weird encoding behaviour in my ASP.NET MVC project. In my Site.Master there is <div class="logo"> <a href="<%=Url.Action("Index", "Win7")%>"><%= Html.Encode("Windows 7 Tutoriál") %></a></div> which translates to the resulting page as <div class="logo"> <a href="/">Windows 7 TutoriA?l</a></div> However, in the Index.aspx there is <h1> Windows 7 Tutoriál</h1> which translates correctly on the same resulting page. I do have <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> as my first line in <head>. Locally, both files are saved in UTF-8 encoding. Any ideas why is this happening and how to fix it? Thanks in advance.

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• asp.net mvc outputting json with backslashes ( escape) despite many attemps to filter

  - by minus4

  i have an asp.net controller that output Json as the results a section of it is here returnString += string.Format(@"{{""filename"":""{0}"",""line"":[", file.Filename); what i get returned is this: "{\"DPI\":\"66.8213457076566\",\"width\":\"563.341067\",\"editable\":\"True\",\"pricecat\":\"6\",\"numpages\":\"2\",\"height\":\"400\",\"page\":[{\"filename\":\"999_9_1.jpg\",\"line\":[]},{\"filename\":\"999_9_2.jpg\",\"line\":[]}]]" i have tried to return with the following methods: return Json(returnString); return Json(returnString.Replace("\\",""); return Json will serialize my string to a jSon string, this i know but it likes to escape for some reason, how can i get rid of it ???? for info this is how i call it with jQuery: $.ajax({ url:"/Products/LoadArtworkToJSon", type:"POST", dataType: "json", async: false, data:{prodid: prodid }, success: function(data){ sessvars.myData = data; measurements = sessvars.myData; $("#loading").remove(); //empty the canvas and create a new one with correct data, always start on page 0; $("#movements").remove(); $("#canvas").append("<div id=\"movements\" style=\"width:" + measurements.width + "px; height:" + Math.round(measurements.height) + "px; display:block; border:1px solid black; background:url(/Content/products/" + measurements.page[0].filename + ") no-repeat;\"></div>"); your help is much appreciated thanks

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• Implementing a normal website inside ASP.NET MVC 2

  - by cc0

  I have a website consisting of an index.html, a number of style sheet files as well as some javascript files. Then I needed a way for this site to communicate efficiently with a Microsoft SQL Server, so I was recommended to use the MVC framework to facilitate that kind of communication. I created the C#.net controller code needed to output the necessary information from the database using URL parameters, so now I am trying to put the whole web-site together inside the MVC framework. I started an empty project-template in MVC 2 framework. I'm sure there must be a good way to implement the current code into this framework, but I am very uncertain as to what the best approach to this would be. Could anyone point me in the right direction here? I'm not sure whether I need to change any of the current HTML, or exactly what to add to it. I'd love to see some kind of guide or tutorial, or just any advice I can get as I try to learn this. Any help is very much appreciated!

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• ASP.NET MVC, Url Routing: Maximum Path (URL) Length

  - by Martin Aatmaa

  The Scenario I have an application where we took the good old query string URL structure: ?x=1&y=2&z=3&a=4&b=5&c=6 and changed it into a path structure: /x/1/y/2/z/3/a/4/b/5/c/6 We're using ASP.NET MVC and (naturally) ASP.NET routing. The Problem The problem is that our parameters are dynamic, and there is (theoretically) no limit to the amount of parameters that we need to accommodate for. This is all fine until we got hit by the following train: HTTP Error 400.0 - Bad Request ASP.NET detected invalid characters in the URL. IIS would throw this error when our URL got past a certain length. The Nitty Gritty Here's what we found out: This is not an IIS problem IIS does have a max path length limit, but the above error is not this. Learn dot iis dot net How to Use Request Filtering Section "Filter Based on Request Limits" If the path was too long for IIS, it would throw a 404.14, not a 400.0. Besides, the IIS max path (and query) length are configurable: <requestLimits maxAllowedContentLength="30000000" maxUrl="260" maxQueryString="25" /> This is an ASP.NET Problem After some poking around: IIS Forums Thread: ASP.NET 2.0 maximum URL length? http://forums.iis.net/t/1105360.aspx it turns out that this is an ASP.NET (well, .NET really) problem. The shit of the matter is that, as far as I can tell, ASP.NET cannot handle paths longer than 260 characters. The nail in the coffin in that this is confirmed by Phil the Haack himself: Stack Overflow ASP.NET url MAX_PATH limit Question ID 265251 The Question So what's the question? The question is, how big of a limitation is this? For my app, it's a deal killer. For most apps, it's probably a non-issue. What about disclosure? No where where ASP.NET Routing is mentioned have I ever heard a peep about this limitation. The fact that ASP.NET MVC uses ASP.NET routing makes the impact of this even bigger. What do you think?

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• Asp.net MVC VirtualPathProvider views parse error

  - by madcapnmckay

  Hi, I am working on a plugin system for Asp.net MVC 2. I have a dll containing controllers and views as embedded resources. I scan the plugin dlls for controller using StructureMap and I then can pull them out and instantiate them when requested. This works fine. I then have a VirtualPathProvider which I adapted from this post public class AssemblyResourceProvider : VirtualPathProvider { protected virtual string WidgetDirectory { get { return "~/bin"; } } private bool IsAppResourcePath(string virtualPath) { var checkPath = VirtualPathUtility.ToAppRelative(virtualPath); return checkPath.StartsWith(WidgetDirectory, StringComparison.InvariantCultureIgnoreCase); } public override bool FileExists(string virtualPath) { return (IsAppResourcePath(virtualPath) || base.FileExists(virtualPath)); } public override VirtualFile GetFile(string virtualPath) { return IsAppResourcePath(virtualPath) ? new AssemblyResourceVirtualFile(virtualPath) : base.GetFile(virtualPath); } public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart) { return IsAppResourcePath(virtualPath) ? null : base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart); } } internal class AssemblyResourceVirtualFile : VirtualFile { private readonly string path; public AssemblyResourceVirtualFile(string virtualPath) : base(virtualPath) { path = VirtualPathUtility.ToAppRelative(virtualPath); } public override Stream Open() { var parts = path.Split('/'); var resourceName = Path.GetFileName(path); var apath = HttpContext.Current.Server.MapPath(Path.GetDirectoryName(path)); var assembly = Assembly.LoadFile(apath); return assembly != null ? assembly.GetManifestResourceStream(assembly.GetManifestResourceNames().SingleOrDefault(s => string.Compare(s, resourceName, true) == 0)) : null; } } The VPP seems to be working fine also. The view is found and is pulled out into a stream. I then receive a parse error Could not load type 'System.Web.Mvc.ViewUserControl<dynamic>'. which I can't find mentioned in any previous example of pluggable views. Why would my view not compile at this stage? Thanks for any help, Ian EDIT: Getting closer to an answer but not quite clear why things aren't compiling. Based on the comments I checked the versions and everything is in V2, I believe dynamic was brought in at V2 so this is fine. I don't even have V3 installed so it can't be that. I have however got the view to render, if I remove the <dynamic> altogether. So a VPP works but only if the view is not strongly typed or dynamic This makes sense for the strongly typed scenario as the type is in the dynamically loaded dll so the viewengine will not be aware of it, even though the dll is in the bin. Is there a way to load types at app start? Considering having a go with MEF instead of my bespoke Structuremap solution. What do you think?

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• Add new row to asp .net grid view using button

  - by SARAVAN

  Hi, I am working in ASP .net 2.0. I am a learner. I have a grid view which has a button in it. Please find the asp mark up below <form id="form1" runat="server"> <div> <asp:GridView ID="myGridView" runat="server"> <Columns> <asp:TemplateField> <ItemTemplate> <asp:Button CommandName="AddARowBelow" Text="Add A Row Below" runat="server" /> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> </div> </form> Please find the code behind below. using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Data; using System.Web.UI.WebControls; namespace GridViewDemo { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { DataTable dt = new DataTable("myTable"); dt.Columns.Add("col1"); dt.Columns.Add("col2"); dt.Columns.Add("col3"); dt.Rows.Add(1, 2, 3); dt.Rows.Add(1, 2, 3); dt.Rows.Add(1, 2, 3); dt.Rows.Add(1, 2, 3); dt.Rows.Add(1, 2, 3); myGridView.DataSource = dt; myGridView.DataBind(); } protected void myGridView_RowCommand(object sender, GridViewCommandEventArgs e) { } } } I was thinking that when I click the command button, it would fire the mygridview_rowcommand() but instead it threw an error as follows: Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" % in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. Can any one let me know on where I am going wrong?

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• ASP.NET MVC 2 "value" in IsValid override in DataAnnotation attribute passed is null, when incorrect

  - by goldenelf2

  Hello to all! This is my first question here on stack overflow. i need help on a problem i encountered during an ASP.NET MVC2 project i am currently working on. I should note that I'm relatively new to MVC design, so pls bear my ignorance. Here goes : I have a regular form on which various details about a person are shown. One of them is "Date of Birth". My view is like this <div class="form-items"> <%: Html.Label("DateOfBirth", "Date of Birth:") %> <%: Html.EditorFor(m => m.DateOfBirth) %> <%: Html.ValidationMessageFor(m => m.DateOfBirth) %> </div> I'm using an editor template i found, to show only the date correctly : <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<System.DateTime?>"%> <%= Html.TextBox("", (Model.HasValue ? Model.Value.ToShortDateString() : string.Empty))%> I used LinqToSql designer to create my model from an sql database. In order to do some validation i made a partial class Person to extend the one created by the designer (under the same namespace) : [MetadataType(typeof(IPerson))] public partial class Person : IPerson { //To create buddy class } public interface IPerson { [Required(ErrorMessage="Please enter a name")] string Name { get; set; } [Required(ErrorMessage="Please enter a surname")] string Surname { get; set; } [Birthday] DateTime? DateOfBirth { get; set; } [Email(ErrorMessage="Please enter a valid email")] string Email { get; set; } } I want to make sure that a correct date is entered. So i created a custom DataAnnotation attribute in order to validate the date : public class BirthdayAttribute : ValidationAttribute { private const string _errorMessage = "Please enter a valid date"; public BirthdayAttribute() : base(_errorMessage) { } public override bool IsValid(object value) { if (value == null) { return true; } DateTime temp; bool result = DateTime.TryParse(value.ToString(), out temp); return result; } } Well, my problem is this. Once i enter an incorrect date in the DateOfBirth field then no custom message is displayed even if use the attribute like [Birthday(ErrorMessage=".....")]. The message displayed is the one returned from the db ie "The value '32/4/1967' is not valid for DateOfBirth.". I tried to enter some break points around the code, and found out that the "value" in attribute is always null when the date is incorrect, but always gets a value if the date is in correct format. The same ( value == null) is passed also in the code generated by the designer. This thing is driving me nuts. Please can anyone help me deal with this? Also if someone can tell me where exactly is the point of entry from the view to the database. Is it related to the model binder? because i wanted to check exactly what value is passed once i press the "submit" button. Thank you.

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• Cannot create instance of abstract class

  - by SmartestVEGA

  I am trying to compile the following code and i am getting the error: Cannot create instance of abstract class . Please help m_objExcel = new Excel.Application(); m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks; m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt)); m_objSheets = (Excel.Sheets)m_objBook.Worksheets; m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1)); // Create an array for the headers and add it to cells A1:C1. object[] objHeaders = {"Order ID", "Amount", "Tax"}; m_objRange = m_objSheet.get_Range("A1", "C1"); m_objRange.Value = objHeaders; m_objFont = m_objRange.Font; m_objFont.Bold=true; // Create an array with 3 columns and 100 rows and add it to // the worksheet starting at cell A2. object[,] objData = new Object[100,3]; Random rdm = new Random((int)DateTime.Now.Ticks); double nOrderAmt, nTax; for(int r=0;r<100;r++) { objData[r,0] = "ORD" + r.ToString("0000"); nOrderAmt = rdm.Next(1000); objData[r,1] = nOrderAmt.ToString("c"); nTax = nOrderAmt*0.07; objData[r,2] = nTax.ToString("c"); } m_objRange = m_objSheet.get_Range("A2", m_objOpt); m_objRange = m_objRange.get_Resize(100,3); m_objRange.Value = objData; // Save the Workbook and quit Excel. m_objBook.SaveAs(m_strSampleFolder + "Book2.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt); m_objBook.Close(false, m_objOpt, m_objOpt); m_objExcel.Quit();

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• How do I change the logged in user to another?

  - by TruMan1

  I would like to change the logged in user to another user temporarily to do some process. For example, say I am logged in as "Joe". In my method, I want to make the logged in user from "Joe" to "SuperUser", do some process, then change the logged in user back to "Joe". Can someone help with this?

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• When the property get and set method has been called?

  - by SmartestVEGA

  i have the following property declaration Public Property IsAreaSelected() As Integer Get Return If(ViewState("IsAreaSelected") Is Nothing, 0, Cint(ViewState("IsAreaSelected"))) End Get Set(ByVal value As Integer) ViewState("IsAreaSelected") = value End Set End Property i want to know when this set and get method will be called ? will it be called when i execute IsAreaSelected() =0 or is there anything like IsAreaSelected().get() or IsAreaSelected().set() ??

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• showing errors from actions in table-based views

  - by enashnash

  I have a view where I want to perform different actions on the items in each row in a table, similar to this (in, say, ~/Views/Thing/Manage.aspx): <table> <% foreach (thing in Model) { %> <tr> <td><%: thing.x %></td> <td> <% using (Html.BeginForm("SetEnabled", "Thing")) { %> <%: Html.Hidden("x", thing.x) %> <%: Html.Hidden("enable", !thing.Enabled) %> <input type="submit" value="<%: thing.Enabled ? "Disable" : "Enable" %>" /> <% } %> </td> <!-- more tds with similar action forms here, a few per table row --> </tr> <% } %> In my ThingController, I have functions similar to the following: public ActionResult Manage() { return View(ThingService.GetThings()); } [HttpPost] public ActionResult SetEnabled(string x, bool enable) { try { ThingService.SetEnabled(x, enable); } catch (Exception ex) { ModelState.AddModelError("", ex.Message); // I know this is wrong... } return RedirectToAction("Manage"); } In the most part, this is working fine. The problem is that if ThingService.SetEnabled throws an error, I want to be able to display the error at the top of the table. I've tried a few things with Html.ValidationSummary() in the page but I can't get it to work. Note that I don't want to send the user to a separate page to do this, and I'm trying to do it without using any javascript. Am I going about displaying my table in the best way? How do I get the errors displayed in the way I want them to? I will end up with perhaps 40 small forms on the page. This approach comes largely from this article, but it doesn't handle the errors in the way I need to. Any takers?

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• CruiseControl .Net Plugin Vb.net Error

  - by Brian

  I am trying to make my own Labeller plugin for Cruise Control .Net 1.4.3. I have made a class based on another plug in example but I keep getting an error Class 'AssemblyVersionLabeller' must implement 'Function Generate(integrationResult As IIntegrationResult) As String' for interface 'ThoughtWorks.CruiseControl.Core.ILabeller' Here is my code : Imports Exortech.NetReflector Imports ThoughtWorks.CruiseControl.Core Imports ThoughtWorks.CruiseControl.Core.Util Namespace NetAssembly.CCNet.Label _ Public Class AssemblyVersionLabeller Implements ILabeller Public Sub Run(ByVal result As IIntegrationResult) result.Label = Generate(result) End Sub Public Function Generate(ByVal integrationResult As IIntegrationResult) As String Dim label As String = integrationResult.LastIntegration.Label Return label End Function <ReflectorProperty("prefix", Required:=False)> _ Public Prefix As String = String.Empty End Class End Namespace What am I doing wrong? What have I missed? Background Info: I am using VS2005. I cant use CrusieControl 1.4.4 RC2 (which has an Assembly Labeller) because my source control's plugin (SCM Anywhere) doesnt work with it.

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• Question about migrating from ASP .NET User Controls to .NET 3.5 Master Page technology

  - by Jim McFetridge

  When migrating from an ASP .NET user control -based page with a header, footer, and menu to a Master Page using the same HTML mark-up, is it normal for CSS or javascript behaviors to change slightly? In particular, the submenu bar text now appears run together (which looks like a CSS symptom) and the graphics on the line above it appear to have an incorrect z-order. (The menu operation is javascript-based.) (I tried to paste images here but couldn't.) Also, the site is very large and we've not been given permission to redo the menu for the entire site. This is a forward-only migration. (Because I know that someone will ask.) Assuming that there are no changes in scope, what are the things that I should check? Thanks! Jim

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• VB.NET ASP.NET Web Application woes (VS 2008)

  - by typoknig

  Hi all, I am making my first web application with ASP.NET and I am having a rough time. I have previously created the application I am working on as a Windows Form application and it works great, but I am having problems with the HTML side of things in the web application. My issues are pretty minor, but very annoying. I have worked with websites before and CSS, but as far as I can tell I do not have direct access to a CSS when creating a web application in VS 2008. My biggest issue is the positioning of components that I have dragged onto the "Default.aspx" form. For instance, how am I supposed to float a panel next to another one if I don't have a CSS, or how am I to correctly position a label?

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• .NET TDD with a Database and ADO.NET Entity Framework - Integration Tests

  - by Brian

  Hello, I'm using ADO.NET entity framework, and am using an AdventureWorks database attached to my local database server. For unit testing, what approaches have people taken to work with a database? Obviously, the database has to be in a pre-defined state of change so that the tests can have some isolation from each other... so I need to be able to run through the inserts and updates, then rollback either between tests or after the batch of tests are done. Any advice? Thanks.

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