static void

ASP Webforms Resources

See also Asp Ajax

Embedded Resources

Instead of loading a resource such as an image or xml file from disc, you can embed it in the assembly, for easier deployment and caching. Add the resource to the project, then Properties- Build Action= Embedded Resource.

To access the file:

Stream stream = GetType().Assembly.GetManifestResourceStream("DemoWidgets.Globe.png");

Then put the stream into a constructor for System.Windows.Media.BitmapImage or whatever.
Asp 2:

Adding resources dynamically

An static image with subfolders- use ResolveUrl with ~ (squiggle)

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <uc1:MyUserControl ID="MyUserControl1" runat="server" />
        <asp:UpdateProgress ID="UpdateProgress1" AssociatedUpdatePanelID="UpdatePanel1"
            runat="server" DisplayAfter="500">
                <div style="position: absolute">
                    <img src='<%=ResolveUrl("~/images/progress.gif") %>' alt="Updating" /></div>

Also useful like ResolveUrl is VirtualPathUtility which is like Path for virtual directories (GetFileName, GetDirectory, Combine). MakeRelative is neat.

string offset = VirtualPathUtility.MakeRelative(Request.AppRelativeCurrentExecutionFilePath, "~/");


Add javascript. Also see RegisterClientScriptInclude, RegisterStartupScript and RegisterClientScriptResource (the typeof()/GetType() is a bit of a pain when you have shared scripts - you need to use a common type)

Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "FixDefaultButton",
                "function fireAlert(s) {alert(s);}", true);

RegisterStartupScript just puts the block at the bottom of the page, but the asp Ajax $addHandler allows you hook into the real Dom onload.

string onLoad = "pageInit('" + textBox1.ClientID + "');";
onLoad = "$addHandler(window, 'load', function() { " + onLoad + " } );";
ClientScript.RegisterStartupScript(GetType(), "PageLoad", onLoad, true);


You can also add script references to the script manager.

<asp:ScriptManager ID="ScriptManager1" runat="server">
        <asp:ScriptReference Path="~/Scripts/jquery.validate.js" />
            Name="WebApplication1.Scripts.EmbeddedScript.js" />

For scripts which are embedded resources, add the WebResource attribute to AssemblyInfo.cs

[assembly: System.Web.UI.WebResource("WebApplication1.Scripts.EmbeddedScript.js", "text/javascript")]

Highlight on error

See the validomatic page.


See jQuery syntax notes.

jQuery UI's dialog is by default outside the form, so do this:

var dlg = $('#<%= MyDialogPanel.ClientID %>').dialog({ autoOpen: false, title: '<%= Resources.WebResources.MyDialogTitle %>' });


Add a stylesheet

private void AddStyleSheet()
    HtmlLink hlink = new HtmlLink();
    hlink.Href = ResolveUrl("StyleSheet.css");
    hlink.Attributes["rel"] = "stylesheet";
    hlink.Attributes["text"] = "text/css";

Potential problem: If you're rebasing your urls in the head (i.e. your masterPage has <script type="text/javascript" src='<%= ResolveClientUrl("~/js/jquery.min.js") %>'></script>) you get an error ("The Controls collection cannot be modified because the control contains code blocks").