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  • Returning JSON object from an ASP.NET page

    - by Emin
    Hi, In my particular situation, I have couple of solutions to my problem. I want to find out which one is more feasible. In this case, I can also achieve my goal by returning a JSON object from my server side code, however, I do not know how it is done and what is the best way of doing it. First off, I don't need a full aspx page as I only need a response returned from code. So, do I use web services? handler? or is there any other specific way you people do this? Is this solution feasible? do I build the JSON string using the StringBuilder class and inject that string into the target aspx page? are there any precautions? or things that I should be aware of? I appreciate your ideas. Regards, Kemal ------------UPDATE !------------ Suppose I have a JSON object in my userlist.aspx page. which then I use it with jQuery... {"menu": { "id": "color1", "value": "color", "popup": { "menuitem": [ {"value": "Red"}, {"value": "Green"}, {"value": "Yellow"} ] } }} // example taken from the json.org/example page now when I want to add a new menuitem from my aspx page, what do I do... I think this way my question is more specific... Lets assume I create a new string in my aspx code, as such "{"value": "Blue"}. Now how do I inject this into the already existing itemlist in the target page? or is this not the correct approach to this kind of situation? if not how else can it be achieved? Also if I wanted to fire a jquery event when a new item is added to this list, how is this achieved?

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  • c# with asp.net

    - by indu
    i need to place a panel in the screen with border color blue, border type solid and the panel should have a rounded corner in all four edge of the panel

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  • ASP.Net mysterious behaviour

    - by kalan
    Does anyone have any idea why this works (expression in the if-clause) if (!(childNode.Roles != null && !Helper.HasEqualElements((string[])childNode.Roles, System.Web.Security.Roles.GetRolesForUser()))) AddNode(childNode, parentNode); And this doesn't if (childNode.Roles == null || Helper.HasEqualElements((string[])childNode.Roles, System.Web.Security.Roles.GetRolesForUser())) AddNode(childNode, parentNode); The problem is that the second if-clause sometimes doesn't work. Though it always works in debug mode, but it sometimes fails while running. And the strange thing is that these two pieces of code seems absolutely equal for me.

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  • IIS hosting, asp.net mvc

    - by tomasz
    Hi I have a site that uses flex and calls controller actions which returns json to the flex. This works fine in a dev server , the folder that has the flex app lives inside the web project and in the dev ennvironment, makes calls hostname, ie www.someurl.com in the actual live scenario, this will be an intranet so not hostname to call, the flex app seems to have trouble calling http://localhost/Virtual directory name it seems to totally miss the virtual directory name. I am obviously missing something basic, any help?

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  • auto refresh of div in mvc3 ASP.Net not working

    - by user1493249
    ViewData.cshtml(Partial View) Date Bill Amount PayNow </tr> </thead> <tbody> @{ for (int i = @Model.bill.Count - 1; i >= 0; i--) { <tr> <td width="30%" align="center">@Model.billdate[i]</td> <td width="30%" align="center">@Model.bill[i]</td> <td width="30%" align="center"> <a class="isDone" href="#" data-tododb-itemid="@Model.bill[i]">Paynow</a> </td> </tr> } } </tbody> Index.cshtml(View) $(document).ready(function () { window.setInterval(function () { var url = '@Url.Action("SomeScreen", "Home")'; $('#dynamictabs').load(url) }, 9000); $.ajaxSetup({ cache: false }); }); @Html.Partial("ViewData") HomeController.cs(Controller) public ActionResult Index() { fieldProcessor fp= new fieldProcessor(); return View(fp); } public ActionResult ShowScreen() { return View("ViewData",fp); } Still the same is not working..

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  • Integrate variable data with div tag in asp.net

    - by Srikanth Mattihalli
    Hi all, I have this code: I need to replace 800px and 300px from database value; I tried both of the below. But still i am not getting the answer. Method 1: <div id="container" style="width:'<% Response.Write(width);%>'px; height:'<% Response.Write(height);%>'px; margin: 0 auto;overflow:hidden;"></div> Method 2: <div id="container" style="width:'<%# Eval("width");%>'px; height: <%# Eval("height");%>'px; margin: 0 auto;overflow:hidden;"></div> The value of height and width variables are defined in page_load() function int height=300; int width= 800; This is not affecting the resulting web page. Can anyone help me on this.

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  • Entity update from ASP.NET MVC page with post to Edit action

    - by mare
    I have a form that posts back to /Edit/ and my action in controller looks like this: // // POST: /Client/Edit [AcceptVerbs(HttpVerbs.Post)] public ActionResult Edit(Client client) My form includes a subset of Client entity properties and I also include a hidden field that holds an ID of the client. The client entity itself is provided via the GET Edit action. Now I want to do entity update but so far I've only been trying without first loading the entity from the DB. Because the client object that comes in POST Edit has everything it needs. I want to update just those properties on the entity in datastore. So far I've tried with Context.Refresh() and AttachTo() but with no success - I'm getting all sorts of exceptions. I inspected the entity object as it comes from the web form and it looks fine (it does have an ID and entered data) mapped just fine. If I do it with Context.SaveChanges() then it just inserts new row..

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  • Equivalent of System.Windows.Forms.Cursor in Web Application(Asp.Net)

    - by Vishwa
    Hi I have a code in windows application now i am trying to implement in web Application but it is showimg that it ths no cursor class (System.Windows.Forms.Cursor )so..wat is the equivalent in web application. Here is my code private void btnGo_Click(System.Object sender, System.EventArgs e) { this.Cursor = Cursors.WaitCursor; Application.DoEvents(); // Load the images. Bitmap bm1 = (Bitmap) (Image.FromFile(txtFile1.Text)); Bitmap bm2 = (Bitmap) (Image.FromFile(txtFile2.Text)); // Make a difference image. int wid = Math.Min(bm1.Width, bm2.Width); int hgt = Math.Min(bm1.Height, bm2.Height); Bitmap bm3 = new Bitmap(wid, hgt); // Create the difference image. bool are_identical = true; int r1; int g1; int b1; int r2; int g2; int b2; int r3; int g3; int b3; Color eq_color = Color.White; Color ne_color = Color.Transparent; for (int x = 0; x <= wid - 1; x++) { for (int y = 0; y <= hgt - 1; y++) { if (bm1.GetPixel(x, y).Equals(bm2.GetPixel(x, y))) { bm3.SetPixel(x, y, eq_color); } else { bm1.SetPixel(x, y, ne_color); are_identical = false; } } } // Display the result. picResult.Image = bm1; Bitmap Logo = new Bitmap(picResult.Image); Logo.MakeTransparent(Logo.GetPixel(1, 1)); picResult.Image = (Image)Logo; this.Cursor = Cursors.Default; if ((bm1.Width != bm2.Width) || (bm1.Height != bm2.Height)) { are_identical = false; } if (are_identical) { MessageBox.Show("The images are identical"); } else { MessageBox.Show("The images are different"); } //bm1.Dispose() // bm2.Dispose() }

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  • Link Button on asp.net user control not firing

    - by andyriome
    Hi I have a user control, which is added to another user control. The nested user control is built up of a gridview, an image button and a link button. The nested user control is added to the outer control as a collection object based upon the results bound to the gridview. The problem that I have is that my link button doesn't work. I click on it and the event doesn't fire. Even adding a break point was not reached. As the nested user control is added a number of times, I have set image button to have unique ids and also the link button. Whilst image button works correctly with its java script. The link button needs to fire an event in the code behind, but despite all my efforts, I can't make it work. I am adding the link button to the control dynamically. Below is the relevant code that I am using: public partial class ucCustomerDetails : System.Web.UI.UserControl { protected override void CreateChildControls( ) { base.CreateChildControls( ); string strUniqueID = lnkShowAllCust.UniqueID; strUniqueID = strUniqueID.Replace('$','_'); this.lnkShowAllCust.ID = strUniqueID; this.lnkShowAllCust.Click += new EventHandler(this.lnkShowAllCust_Click); this.Controls.Add(lnkShowAllCust); } protected override void OnInit (EventArgs e) { CreateChildControls( ); base.OnInit(e); } protected override void OnLoad(EventArgs e) { base.EnsureChildControls( ); } protected void Page_Load(object sender, EventArgs e) { if (IsPostBack) { CreateChildControls( ); } } protected void lnkShowAllCust_Click(object sender, EventArgs e) { this.OnCustShowAllClicked(new EventArgs ( )); } protected virtual void OnCustShowAllClicked(EventArgs args) { if (this.ViewAllClicked != null) { this.ViewAllClicked(this, args); } } public event EventHandler ViewAllClicked; } I have been stuggling with this problem for the last 3 days and have had no success with it, and I really do need some help. Can anyone please help me?

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  • ASP.NET MVC 2: HtmlHelpers, foreach?

    - by dcolumbus
    This one is new to me... I'm bringing in a Model that represents a list of items. Some items should be rendered as a number of checkboxes and radios. Others will be rendered in a list. Now I know how to foreach the items and spit them out manually... but I'd like to be able to check them against the Model that I have, making sure that at least one optios is selected/chosen. And obviously display the associated validation errors. This is how I am displaying the checkbox items manually: <ul> <% foreach (Corporate.Entities.DesignLayout.Tag tag in Model.DesignOptions.Items) { %> <li><input type="checkbox" /><%: tag.TagName %></li> <% } %> </ul> Two questions arise: 1) How do I check that list of checkboxes against my model? 2) How would I render the tag items with an HtmlHelper SelectList? Example: <%: Html.ListBoxFor(m=>m.DesignOptions, [don't know what I should put here]) %>

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  • Creating a process in ASP.NET MVC controller

    - by GRKamath
    I have a requirement to run an application through my MVC controller. To get the installation path I used following link (I used answer provided by Fredrik Mörk). It worked and I could able to run the exe through a process. The problem occurred when I deployed this solution on IIS where it did not create the process as it was creating in local dev environment. Can anybody tell me how to create a windows process through a solution which is hosted on IIS ? private string GetPathForExe(string fileName) { private const string keyBase = @"SOFTWARE\Wow6432Node\MyApplication"; RegistryKey localMachine = Registry.LocalMachine; RegistryKey fileKey = localMachine.OpenSubKey(string.Format(@"{0}\{1}", keyBase, fileName)); object result = null; if (fileKey != null) { result = fileKey.GetValue("InstallPath"); } fileKey.Close(); return (string)result; } public void StartMyApplication() { Process[] pname = Process.GetProcessesByName("MyApplication"); if (pname.Length == 0) { string appDirectory = GetPathForExe("MyApplication"); Directory.SetCurrentDirectory(appDirectory); ProcessStartInfo procStartInfo = new ProcessStartInfo("MyApplication.exe"); procStartInfo.WindowStyle = ProcessWindowStyle.Hidden; Process proc = new Process(); proc.StartInfo = procStartInfo; proc.Start(); } }

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  • Images with razor asp.net mvc inside JS

    - by sarsnake
    I need to dynamically insert an image in my JS code. In my Razor template I have: @section Includes { <script type="text/javascript"> var imgPath = "@Url.Content("~/Content/img/")"; alert(imgPath); </script> } Then in my JS I have: insertImg = ""; if (response[i].someFlag == 'Y') { insertImg = "<img src=\"" + imgPath + "/imgToInsert.gif\" width=\"6px\" height=\"10px\" />"; } But it doesn't work - it will not find the image. The image is stored in /Content/img folder... What am I doing wrong?

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  • Removing web.config from subversion (ASP.NET Project)

    - by adinas
    I have a project which is source controlled using Subversion and VisualSVN. Since the version of web.config is different on the server and the developers' computers I want the file to remain on the computers but to be ignored by Subversion. I added it to the svn:ignore but it still remains (and still has a red exclamation mark too since we are not committing it). How can I remove it from Subversion safely without it being deleted from the files system Thanks, Adin

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  • HtmlHelperExtensions are not visible in view mvc3 asp.net

    - by user1299372
    I've added a class for the HTML Custom Extensions: using System; using System.Linq.Expressions; using System.Text; using System.Web.Mvc; using System.Web.Mvc.Html; namespace App.MvcHtmlHelpers { public static class HtmlHelperExtensions { public static MvcHtmlString ComboBox(HtmlHelper html, string name, SelectList items, string selectedValue) { var sb = new StringBuilder(); sb.Append(html.DropDownList(name + "_hidden", items, new { @style = "width: 200px;", @onchange = "$('input#" + name + "').val($(this).val());" })); sb.Append(html.TextBox(name, selectedValue, new { @style = "margin-left: -199px; width: 179px; height: 1.2em; border: 0;" })); return MvcHtmlString.Create(sb.ToString()); } public static MvcHtmlString ComboBoxFor<TModel, TProperty>(HtmlHelper<TModel> html, Expression<Func<TModel, TProperty>> expression, SelectList items) { var me = (MemberExpression)expression.Body; var name = me.Member.Name; var sb = new StringBuilder(); sb.Append(html.DropDownList(name + "_hidden", items, new { @style = "width: 200px;", @onchange = "$('input#" + name + "').val($(this).val());" })); sb.Append(html.TextBoxFor(expression, new { @style = "margin-left: -199px; width: 179px; height: 1.2em; border: 0;" })); return MvcHtmlString.Create(sb.ToString()); } I've also registered it in my site web config: <namespaces> <add namespace="System.Web.Helpers" /> <add namespace="System.Web.Mvc" /> <add namespace="System.Web.Mvc.Ajax" /> <add namespace="System.Web.Mvc.Html" /> <add namespace="System.Web.Routing" /> <add namespace="System.Web.WebPages" /> <add namespace="App.MvcHtmlHelpers"/> </namespaces> In my view, I import the namespace: <%@ Import Namespace="RSPWebApp.MvcHtmlHelpers" %> But when I go to call it in the view, it doesn't recognize the custom extension. Can someone help me by telling me what I might have missed? Thanks so much in advance! <%:Html.ComboBoxFor(a => a.Street2, streetAddressListItems) %

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  • Code reviews for larger ASP.NET MVC team using TFS

    - by Parrots
    I'm trying to find a good code review workflow for my team. Most questions similar to this on SO revolve around using shelved changes for the review, however I'm curious about how this works for people with larger teams. We usually have 2-3 people working a story (UI person, Domain/Repository person, sometimes DB person). I've recommended the shelf idea but we're all concerned about how to manage that with multiple people working the same feature. How could you share a shelf between multiple programmers at that point? We worry it would be clunky and we might easily have unintended consequences moving to this workflow. Of course moving to shelfs for each feature avoids having 10 or so checkins per feature (as developers need to share code) making seeing the diffs at code review time painful. Has anyone else been able to successfully deal with this? Are there any tools out there people have found useful aside from shelfs in TFS (preferably open-source)?

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  • Best way to implement nested loops in a view in asp.net mvc 2

    - by Junior Ewing
    Hi, Trying to implement some nested loops that are spitting out good old nested html table data. So the question is; What is the best way to loop through lists and nested lists in order to produce easily maintainable code. It can get quite narly quite fast when working with multiple nested tables or lists. Should I make use of a HTML helper, or make something with the ViewModel to simplify this? A requirement is if there are no children at a node there should be an empty row on that spot with some links for creation and into other parts of the system.

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  • ASP.net Associate session with client/request based on ip

    - by ase69s
    In one web page we use a flash upload control but becouse a flash bug in the upload event the session is lost as its posted back with a new session. We have tought of using a table with ip and old session id or a query string with the old session id in order to reassing it in the uploaded event... Knowing the old session id how can i reassign it to the client? (In C#)

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  • ASP.NET: Resource strings

    - by JamesBrownIsDead
    I have an .ascx file. This file has an associated .ascx.resx in multiple languages. I want to get a resource string for a specific CultureInfo. Ordinarily I'd use this.GetLocalResourceObject in the codebehind, but I don't want a local resource string, I want one for a specific language.

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  • ASP NET forms Authorization: how to reduce duration?

    - by eddo
    I've got a web page which is implementing cookie based ASPNET Forms Authentication. Once the user has logged in the page, he can edit some information using a form which is created using a partialview and returned to him as a dialog for editing. The action linked to the partial view is decorated as follows: [HttpGet] [OutputCache(Duration = 0, VaryByParam = "None")] [Authorize(Roles = "test")] public ActionResult changeTripInfo(int tripID, bool ovride=false) { ... } The problem i am experiencing is the latency between the request and the time when the dialog is shown to the user: time ranges between 800 and 1100 ms which is not justified by the complexity of the form. Investigating with Glimpse turns out that the time to process the AuthorizeAttribute (see snip) sums up to at least 650 ms which is troubling me. Looking at the Sql server log, the call which checks the user roles takes, as expected, virtually nothing (duration 0). How can I reduce this time? Am I missing some optimization?

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