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Common Issues

This topic describes some of the possible issues with RadFileExplorer and how to deal with them

Upload or Delete commands are disabled

Make sure that UploadPaths or DeletePaths properties are set correctly

Setting a path to the InitialPath property does not select folder or file

Make sure that the path set to the property has the same format as the path shown in the RadFileExplorer's address bar. This is required in order to provide unambiguous paths for any content provider.

The provided path must point to a concrete file that is present in the currently shown file list (i.e., in the current folder). If you point the control to a folder that is not yet opened, it cannot navigate to the desired file, because the file list is obtained via a separate request only after the folder is shown to the client, so the control does not know whether the desired file exists yet.

An error like "... because the application did not have enough permissions..." occurs only in a production environment. How to debug the issue?

  • Remove the RadFileExplorer (or all Telerik controls) from the page

  • In the code behind of the same page where the RadFileExplorer was declared add this code:

protected void Page_Load(object sender, EventArgs e)
    string[] paths = new string[] { "~/RootDirectory1/" };// Path to test

    //RadFileExplorer1.Configuration.ViewPaths = paths;
    //RadFileExplorer1.Configuration.DeletePaths = paths;
    //RadFileExplorer1.Configuration.UploadPaths = paths;

    FullPermissionsTest(Server.MapPath(paths[0]));// Pass physical path

/// <summary>
/// Full permission test
/// </summary>
/// <param name="testPhysicalPath">Physical path</param>
private void FullPermissionsTest(string testPhysicalPath)
        string physicalPathToTestFolder = System.IO.Path.Combine(testPhysicalPath, "TestDirectory");
        System.IO.DirectoryInfo testDir = System.IO.Directory.CreateDirectory(physicalPathToTestFolder);// Create folder
        testDir.GetDirectories();// List folders
        string testFilePath = System.IO.Path.Combine(testDir.FullName, "TestFile1.txt");// test file paths
        System.IO.File.Create(testFilePath).Close();// Create a file
        testDir.GetFiles("*.*");// List files
        System.IO.File.OpenRead(testFilePath).Close();// Open a file
        System.IO.File.Delete(testFilePath);// delete the test file
        System.IO.Directory.Delete(physicalPathToTestFolder);// delete the test folder
    catch (Exception ex)
    {// Show the probelm

        string message = ex.Message;
        string script = string.Format("alert('{0}');", message.Replace("'", @""""));
        ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "KEY", script, true);
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    Dim paths As String() = New String() {"~/RootDirectory1/"} ' Path to test

    'RadFileExplorer1.Configuration.ViewPaths = paths;
    'RadFileExplorer1.Configuration.DeletePaths = paths;
    'RadFileExplorer1.Configuration.UploadPaths = paths;

    FullPermissionsTest(Server.MapPath(paths(0))) ' Pass physical path
End Sub

''' <summary>
''' Full permission test
''' </summary>
''' <param name="testPhysicalPath">Physical path</param>
''' <remarks></remarks>
Private Sub FullPermissionsTest(ByVal testPhysicalPath As String)
        Dim physicalPathToTestFolder As String = System.IO.Path.Combine(testPhysicalPath, "TestDirectory")
        Dim testDir As System.IO.DirectoryInfo = System.IO.Directory.CreateDirectory(physicalPathToTestFolder) 'Create folder
        testDir.GetDirectories() ' List folders
        Dim testFilePath As String = System.IO.Path.Combine(testDir.FullName, "TestFile1.txt") ' test file paths
        System.IO.File.Create(testFilePath).Close() ' Create a file
        testDir.GetFiles("*.*") ' List files
        System.IO.File.OpenRead(testFilePath).Close() ' Open a file
        System.IO.File.Delete(testFilePath) ' delete the test file
        System.IO.Directory.Delete(physicalPathToTestFolder) ' delete the test folder
    Catch ex As Exception
        ' Show the probelm
        Dim message As String = ex.Message
        Dim script As String = String.Format("alert('{0}');", message.Replace("'", """"))
        ScriptManager.RegisterStartupScript(Me.Page, Me.Page.[GetType](), "KEY", script, True)
    End Try
End Sub
  • If an exception is thrown during the test, the text of the error (the value of the ex.Message property) will be shown as a JavaScript popup