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    Custom Http Handler

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    Telerik ASP.NET Async Upload control relies on an Http handler to upload files and performs the uploads by dividing the files in chunks and saving them in a temporary folder.

    This demo shows how you can inherit and extend the default Http handler to create a custom one which allows you to save files directly to a database instead of a temporary folder.

    For our demo purposes we have set two handlers: one saving your file to the database and returning the database record identifier, and another retrieving the uploaded image from the database in order for it to be visualized.

    • DefaultCS.aspx
    • DefaultCS.aspx.cs
      • DefaultCS.aspx.cs
      • Handler.ashx.cs
      • SampleAsyncUploadConfiguration.cs
      • SampleAsyncUploadResult.cs
      • StreamImage.ashx.cs
    • scripts.js
    • styles.css
    <%@ Page Language="C#" AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="Upload_ImageUploader_DefaultCS" %>
     
    <!DOCTYPE html>
    <html xmlns='http://www.w3.org/1999/xhtml'>
    <head runat="server">
        <title>Telerik ASP.NET Example</title>
        <link rel="stylesheet" type="text/css" href="styles.css" />
        <script src="scripts.js" type="text/javascript"></script>
    </head>
     
    <body>
        <form id="form1" runat="server">
        <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
        <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
     
        <div class="demo-container size-narrow">
            <p class="info"></p>
            <telerik:RadAsyncUpload RenderMode="Lightweight" runat="server" ID="RadAsyncUpload1" HttpHandlerUrl="~/AsyncUpload/Examples/ImageUploader/Handler.ashx"
                OnClientFileUploaded="fileUploaded" OnClientFileUploadRemoving="fileUploadRemoving" 
                MultipleFileSelection="Disabled" AllowedFileExtensions="jpeg,jpg,gif,png,bmp" Width="500px" />
            <div class="imageContainer"></div>
        </div>
     
        <script type="text/javascript">
            Sys.Application.add_load(function () {
                demo.initialize();
            });
        </script>
     
        </form>
    </body>
    </html>

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