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  • .NET: Can I use DataContractJsonSerializer to serialize to a JSON associative array?

    - by Cheeso
    When using DataContractJsonSerializer to serialize a dictionary, like so: [CollectionDataContract] public class Clazz : Dictionary<String,String> {} .... var c1 = new Clazz(); c1["Red"] = "Rosso"; c1["Blue"] = "Blu"; c1["Green"] = "Verde"; Serializing c1 with this code: var dcjs = new DataContractJsonSerializer(c1.GetType()); var json = new Func<String>(() => { using (var ms = new System.IO.MemoryStream()) { dcjs.WriteObject(ms, c1); return Encoding.ASCII.GetString(ms.ToArray()); } })(); ...produces this JSON: [{"Key":"Red","Value":"Rosso"}, {"Key":"Blue","Value":"Blu"}, {"Key":"Green","Value":"Verde"}] But, this isn't a Javascript associative array. If I do the corresponding thing in javascript: produce a dictionary and then serialize it, like so: var a = {}; a["Red"] = "Rosso"; a["Blue"] = "Blu"; a["Green"] = "Verde"; // use utility class from http://www.JSON.org/json2.js var json = JSON.stringify(a); The result is: {"Red":"Rosso","Blue":"Blu","Green":"Verde"} How can I get DCJS to produce or consume a serialized string for a dictionary, that is compatible with JSON2.js ? I know about JavaScriptSerializer from ASP.NET. Not sure if it's very WCF friendly. Does it respect DataMember, DataContract attributes?

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  • ASP.NET AJAX Modal Popup on Mouse Over

    Todays customer question concerns client side predicates for showing a Modal Popup control. Im happy to be getting these kind of questions because it shows how ASP.NET developers are continuing to evolve their web development perspective and separate server logic execution and client logic execution. Though the Modal Popup Extender is a Server Side control extender it HAS client side events and methods. This exposes the Modal Popup to any JavaScript coding that we want. Example mouseover !...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • ASP.NET - Extend gridview to allow filtering, sorting, paging, etc...

    - by Zach
    I have seen threads on many sites regarding extending the gridview control so obviously this will be a duplicate. But I haven't found any that truly extend the control to the extent that you could have custom sorting (with header images), filtering by putting drop downs or textboxes in header columns (on a column by column basis) and custom paging (one that doesn't return all records but just returns the ones requested for the given page). Are there any good tutorials that show the inner-workings of the gridview and how to override the proper functions? I've seen several snippets here and there but none seem to really work and explain things well. Any links would be appreciated. Thanks!

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  • Disable cache in Silverlight HttpWebRequest

    - by synergetic
    My Silverlight4 app is hosted in ASP.NET MVC 2 web application. I do web request through HttpWebRequest class but it gives back a result previously cached. How to disable this caching behavior? There are some links which talks about HttpWebRequest in .NET but Silverlight HttpWebrequest is different. Someone suggested to add unique dummy query string on every web request, but I'd prefer more elegant solution. I also tried the following, but it didn't work: _myHttpWebRequest.BeginGetRequestStream(new AsyncCallback(BeginRequest), new Guid()); In fact, by setting browser history settings it is possible to disable caching. See the following link: http://stackoverflow.com/questions/3027145/asp-net-mvc-with-sql-server-backend-returns-old-data-when-query-is-executed But asking a user to change browser settings is not an option for me.

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  • Why is the UpdatePanel Response size changing on alternate requests?

    - by Decker
    We are using UpdatePanel in a small portion of a large page and have noticed a performance problem where IE7 becomes CPU bound and the control within the UpdatePanel takes a long time (upwards of 30 seconds) to render. We also noticed that Firefox does not seem to suffer from these delays. We ran both Fiddler (for IE) and Firebug (for Firefox) and noticed that the real problem lied with the amount of data being returned in update panel responses. Within the UpdatePanel control there is a table that contains a number of ListBox controls. The real problem is that EVERY OTHER TIME the response (from making ListBox selections) alternates from 30K to 430K. Firefox handles the 400+K response in a reasonable amount of time. For whatever reason, IE7 goes CPU bound while it is presumably processing this data. So irrespective of whether or not we should be using an UpdatePanel or not, we'd like to figure out why every other async postback response is larger by a factor of more than 10 than the previous one. When the response is in the 30K range, IE updates the display within a second. On the alternate times, the response time is well over 10 times longer. Any idea why this alternating behavior should be happening with an UpdatePanel?

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  • ASPXAUTH cookie is not being saved.

    - by kripto_ash
    Hi, Im working on a web project in ASP .NET MVC 2. In this project we store some info inside an ecripted cookie (the ASPXAUTH cookie) to avoid the need to query the db for every request. The thing is the code for this part has suddenly stopped working. I reviewed the changes made to the code on the source control server for anything that could be causing it, I found nothing. I even reverted to a known working copy (working on some other persons PC, same code, etc) but after debugging, it seems the .ASPXAUTH cookie is not getting saved anymore. Instead the ASP.NET_SessionId cookie is being set... (wich before wasn't) I changed the web.config file to turn off the sessionState. This eliminated the ASP.NET_SessionId cookie from being set, but it is still not saving the auth cookie. Ive recently installed some Microsoft Windows XP Updates, but the other person (whos PC runs the application just fine) also did. After googling, some info i found pointed out to a problem with the expiration date of the cookie. Ether cus the pc didnt have the right time/date (this was not the case) and others cus of the cookie expiration date being wrongly set. (I checked and it is being set correctly)... The problem persists with other browsers besides the one im using (Chrome) i tried it with IE6. Any ideas on why this is happening? Ill continue to post any helpful information i can find. Thanks in advance.

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  • JavaScript call to page method: error 500. JSON

    - by Ryan Ternier
    I'm using the auto complete control here:http://www.ramirezcobos.com/labs/autocomplete-for-jquery-js/comment-page-2/ And i've modified it as: var json_options; json_options = { script:'ReportSearch.aspx/GetUserList?json=true&limit=6&', varname:'input', json:true, shownoresults:true, maxresults:16, callback: function (obj) { $('#json_info').html('you have selected: '+obj.id + ' ' + obj.value + ' (' + obj.info + ')'); } }; $('#ctl00_contentModule_txtJQuerySearch').autoComplete(json_options); I have the following method in C# Code behind (aspx.cs) [System.Web.Services.WebMethod] [System.Web.Script.Services.ScriptMethod] public static string[] GetUserList(string input) { List<string> lUsers = new List<string>(); Server.DAL.SQLServer2005.User user = new Server.DAL.SQLServer2005.User(); Server.Info.AuthUser aUser = (Server.Info.AuthUser)HttpContext.Current.Session["AuthUser"]; List<Server.Info.User.UserDetails> users = user.GetUserList(aUser, input, 16, true); users.ForEach(delegate(ReportBeam.Server.Info.User.UserDetails u) { lUsers.Add("(" + u.UserName + ")" + u.LastName + ", " + u.FirstName); }); return lUsers.ToArray(); } The error I get back is: Server Error in '/WebPortal4' Application. Unknown web method GetUserList. Parameter name: methodName If I change any of the paraemeter names I get an error telling me the paremeter names are not in match. now that everything is as it should, it's bombing. Any help would rock.

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  • ASP.Net: Writing chunks of file..HTTP File upload with resume..

    - by Manish
    Please refer to question: http://stackoverflow.com/questions/2062852/resume-in-upload-file-control Now to find a solution for the above question, I want to work on it and develop a user control which can resume a HTTP File Upload process. For this, I'm going to create a temporary file on server until the upload is complete. Once the uploading is done completely then will just save it to the desired location. The procedure I have thought of is: Create a temporary file with a unique name (may be GUID) on the server. Read a chunk of file and append it to this temp file on the server. Continue step 1 to 3 until EOF is reached. Now if the connection is lost or user clicks on pause button, the writing of file is stopped and the temporary file is not deleted. Clicking on resume again or uploading the same file again will check on the server if the file exists and user whether to resume or to overwrite. (Not sure how to check if it's the same file. Also, how to step sending the chunks from client to server.) Clicking on resume will start from where it is required to be uploaded and will append that to the file on the server. (Again not sure how to do this.) Questions: Are these steps correct to achieve the goal? Or need some modifications? I'm not sure how to implement all these steps. :-( Need ideas, links... Any help appreciated...

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  • How to make ASP.NET authentication persist the Url Fragment when redirecting to the login page?

    - by estourodepilha.com
    After I inserted the configuration below in my Web.Config <authentication mode="Forms"> <forms name="appNameAuth" path="/" loginUrl="login.aspx" protection="All" timeout="30"> <credentials passwordFormat="Clear"> <user name="user" password="password" /> </credentials> </forms> </authentication> <authorization> <deny users="?" /> </authorization> All requests to Menu.aspx#fragment are redirected to login.aspx?ReturnUrl=/Menu.aspx and I expected it to be redirected to login.aspx?ReturnUrl=/Menu.aspx#fragment How to achieve the desired behavior?

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  • when add dynamic control in update panel then getting failed to load viewsate error ?

    - by Tushar Maru
    when add dynamic control in update panel then getting failed to load viewsate error ? see following example :- UpdatePanel panel = new UpdatePanel(); panel.ContentTemplateContainer.Controls.Clear(); if (strPopupType == "O") { Control ctrl = Page.LoadControl(@"~/Modules/MLM/UnilevelViewer/DesktopModules/OrderDetails.ascx"); OrderDetails orderdetails = (OrderDetails)ctrl; orderdetails.ID = "Orders" + elementID; orderdetails.OrderID = Convert.ToInt32(elementID); //orderdetails.ModuleSkinStyleName = CurrentModuleSkin; panel.ContentTemplateContainer.Controls.Add(ctrl); } else if (strPopupType == "U") { Control ctrl = Page.LoadControl(@"~/Modules/MLM/UnilevelViewer/DesktopModules/UserDetails.ascx"); UserDetails userdetails = (UserDetails)ctrl; userdetails.ID = "Users" + elementID; // userdetails.UserModuleSkinStyleName = CurrentModuleSkin; userdetails.UserID = new Guid(elementID); panel.ContentTemplateContainer.Controls.Add(ctrl); }

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  • AutoCompleteExtender not working for WebService hosted on IIS 7

    - by Manish
    I have a web service file in my project having a web method which is used for AutoCompleteExtender and which works fine when I debug it from VS. But when I publish and host it on IIS, it's not working properly. However, I tested the webservice method directly by typing the URL and it gave the desired output. Is their a special setting needs to be done in IIS to make it working or any property of AutoCompleteExtender need to be set?

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  • Debugging and Tracing in ASP.NET AJAX

    Debugging ASP.NET AJAX applications is a challenge because they contain both server-side and client-side code. Use this ASP.NET tutorial to get some helpful tips for using debugging and tracing in ASP.NET AJAX applications.

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  • Debugging and Tracing in ASP.NET AJAX

    Debugging ASP.NET AJAX applications is a challenge because they contain both server-side and client-side code. Use this ASP.NET tutorial to get some helpful tips for using debugging and tracing in ASP.NET AJAX applications.

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  • Html.LabelFor and Html.TextBoxFor generate empy html code

    - by Ceridan
    I'm writing my first ASP.NET MVC application and there is one big problem for me. I want to make a control which will represent a form, but when I try to generate labels and textboxes it returns to me empty page. So, this is my model file (MyModel.cs): namespace MyNamespace.Models { public class MyModel { [Required(ErrorMessage = "You have to fill this field")] [DisplayName("Input name")] public string Name{ get; set; } } } This is MyFormControlView.ascx file with my control: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<MyNamespace.Models.MyModel>"%> <div> <% using (Html.BeginForm()) { Html.LabelFor(m => m.Name); Html.TextBoxFor(m => m.Name); Html.ValidationMessageFor(m => m.Name); } %> </div> And this is my Index.aspx file where I render the control: <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Main.Master" Inherits="System.Web.Mvc.ViewPage<System.Collections.IEnumerable>" %> <asp:Content runat="server" ID="MainContent" ContentPlaceHolderID="MainContent"> This is my control test! <%Html.RenderPartial("MyFormControlView", new MyNamespace.Models.MyModel { Name = "MyTestName"}); %> </asp:Content> So, when I run my application the result is lonely caption: "This is my control test!" and there are no label or textbox on the generated page. If I inspect the source code of the generated page I can see my block, but it's inner text is empty. Please, could you help me?

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  • How to handle relative paths in ASP.NET MVC?

    - by AngryHacker
    I have a master page which references a style in the following manner: <link rel="stylesheet" type="text/css" href="../../Content/Style.css" /> All my pages inherit from this master page. And this works well when the URL is http://www.domain.com/home/details/5, however the URL is http://www.domain.com/home/create, then, of course, Style.css cannot be found because `../../Content/Style.css' resolves to a directory one higher where there is nothing there. How is this typically handled?

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  • resize ModalPopupExtender

    - by Joo Park
    after showing the ModalPopupExtender, there are two radio buttons that are displayed as part of the popup. When you select the second radio button, I display more information in a gridview control. When the ModalPopupExtender first displays, I have it set at 40% for width and height for the panel associated with the popup. After clicking the second radio button, I would like to resize the popup to 80% for width and height. My question is how do you resize ModalPopupExtender after it's initial popup?

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  • How do I get the User Entered Value in AjaxControlToolkit ComboBox when the enter key is pressed?

    - by Jason
    The Problem: The user entered value is missing in the .Text attribute of the AjaxControlToolkit ComboBox when the enter key pressed. Also the “on change” events events are not called but I am not using postbacks anyway so I do not care. Example: private void BuildFileListDetails(NHibernateDataProvider _providerM) { int resultsPage = Convert.ToInt32(ddlNavPageNumber.Text); const int RESULTS_PAGE_SIZE = 100; // The cbFileName.Text equals "" Not what user entered string searchFileName= cbFileName.Text; var xrfFiles = _providerM.GetXrfFiles(searchFileName, resultsPage, RESULTS_PAGE_SIZE); gvXrfFileList.DataSource = xrfFiles; gvXrfFileList.DataBind(); } My Solution: I needed to access the AjaxToolkit "ComboBox" imbedded TextBox control's .Text to access the value entered by user. private void BuildFileListDetails(NHibernateDataProvider _providerM) { int resultsPage = Convert.ToInt32(ddlNavPageNumber.Text); const int RESULTS_PAGE_SIZE = 100; string searchFileName; //The Solution: Access the AjaxToolkit "ComboBox" imbedded TextBox control's .Text to access the value entered by user. TextBox textBox = cbFileName.FindControl("TextBox") as TextBox; if (textBox != null) { searchFileName = textBox.Text; //textBox.Text = "User Entered Value" } else { searchFileName = cbFileName.Text; } var xrfFiles = _providerM.GetXrfFiles(searchFileName, resultsPage, RESULTS_PAGE_SIZE); gvXrfFileList.DataSource = xrfFiles; gvXrfFileList.DataBind(); }

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  • ASP .NET Login Session How to destroy session object when logging out from Home Page??

    - by Vinodh Kumar
    I have created a website. I login with username and password and after authenticating i redirect the user to Home Page. When the user clicks Logout, they are redirected to the Login Page. But after this when i click the BACK button on the browser, it again goes back to the Home Page with that user's login credentials. I have used Session["username"]=null in the Page_Load function of Home Page. How to avoid going back to the Home Page when the BACK button is clicked by the User??

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  • How to perform two-way data binding of controls in a user control inside a FormView

    - by Sandor Drieënhuizen
    I'm trying to perform two-way data binding on the controls in my user control, which is hosted inside a FormView template. FormView: <asp:ObjectDataSource runat="server" ID="ObjectDataSource" TypeName="WebApplication1.Data" SelectMethod="GetItem" UpdateMethod="UpdateItem"> </asp:ObjectDataSource> <asp:FormView runat="server" ID="FormView" DataSourceID="ObjectDataSource"> <ItemTemplate> <uc:WebUserControl1 runat="server"></uc:WebUserControl1> </ItemTemplate> <EditItemTemplate> <uc:WebUserControl1 runat="server"></uc:WebUserControl1> </EditItemTemplate> </asp:FormView> User control: <%@ Control Language="C#" ... %> <asp:TextBox runat="server" ID="TitleTextBox" Text='<%# Bind("Title") %>'> </asp:TextBox> The binding works fine when the FormView is in View mode but when I switch to Edit mode, upon calling UpdateItem on the FormView, the bindings are lost. I know this because the FormView tries to call an update method on the ObjectDataSource that does not have an argument called 'Title'. I tried to solve this by implementing IBindableTemplate to load the controls that are inside my user control, directly into the templates (just like I had entered them declaratively like in the code above). However, when calling UpdateItem in edit mode, the container that gets passed into the ExtractValues method of the template, does not contain the TextBox anymore. It did in view mode! I have found some questions on SO that relate to this problem but they are rather dated and they don't provide any answers that helped me solve this problem. How do you think I could solve this problem? It seems to be such a simple requirement but apparently it's more like opening a can of worms...

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  • Asp.net HttpWebResponse - how can I not depend on WebException for flow control?

    - by Campos
    I need to check whether the request will return a 500 Server Internal Error or not (so getting the error is expected). I'm doing this: HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; request.Method = "GET"; HttpWebResponse response = request.GetResponse() as HttpWebResponse; if (response.StatusCode == HttpStatusCode.OK) return true; else return false; But when I get the 500 Internal Server Error, a WebException is thrown, and I don't want to depend on it to control the application flow - how can this be done?

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  • how can I future-proof migration of a ADO.net local data layer to a future web based interface (web-

    - by Greg
    Hi, BACKGROUND: I am working on a .NET WinForms application now (C#) with an ADO.net database for the data layer. QUESTION: How an I develop this now such that it would be easy to migrate to a model where the data layer is abstracted via a HTTP web-service or REST interface? For example would just use of a standard C# interface with a Factory to obtain a concrete implementation of the interface where this uses ADO.net be the best? thanks

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