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Displaying single upload control in the FileBrowser Upload manager

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Article relates to

 RadEditor for ASP.NET AJAX
 Telerik.Web.UI

Created by

 Rumen Zhekov

HOW-TO
Display single upload control in the FileBrowser Upload manager

DESCRIPTION
By default the Upload manager in the RadEditor's FileBrowser dialogs contains three RadUpload controls in it. If you want to customize the Upload dialog and show a single Upload control then follow the instructions below.

SOLUTION
1) Register the external dialog files of RadEditor:
   - Copy the EditorDialogs installation folder to the root of the web project
   - Set the ExternalDialogsPath= "~/EditorDialogs/";  property, e.g.
 
<telerik:radeditor runat="server" ExternalDialogsPath="~/EditorDialogs" ID="RadEditor1"> 
    <ImageManager ViewPaths="~/" UploadPaths="~/" /> 
</telerik:radeditor> 

2) Create a UserControl in the root of your web application for example named UserControl.ascx and put the following code in it:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="UserControl.ascx.cs" Inherits="UserControl" %> 
<script runat="server" type="text/C#">  
  
    protected void Page_Load(object sender, System.EventArgs args)  
    {  
        Telerik.Web.UI.RadFileExplorer rfe = (Telerik.Web.UI.RadFileExplorer)this.FindRadControl(this.Page);  
        if (rfe != null)  
        { 
            rfe.Upload.MaxFileInputsCount = 1; 
        }  
    }  
  
    
  
    private Control FindRadControl(Control parent)  
    {  
        foreach (Control c in parent.Controls)  
        { 
             
            if (c is Telerik.Web.UI.RadFileExplorer) return c;  
            if (c.Controls.Count > 0)  
            {  
                Control sub = FindRadControl(c);  
                if (sub != null) return sub;  
            }  
        }  
        return null;  
    }  
  
</script>  

3) Register the custom control in the \EditorDialogs\FileBrowser.ascx external dialog control:
<%@ Register TagPrefix="custom" TagName="customControl" Src="~/UserControl.ascx"  %>   
<custom:customControl ID="customControl1" runat="server" />  

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