Last Updated: 24 Mar 2023 15:19 by ADMIN
Release R1 2023 SP1

TreeView context menu remains visible when a permission alert is shown. I should be hidden like the Grid contect menu is.


Steps to reproduce:

1. Copy a file from the Grid in RadFileExplorer

2. Right click over the same directory in the TreeView and select Paste



Last Updated: 15 Sep 2022 14:26 by ADMIN
Created by: Van
Comments: 8
Category: FileExplorer
Type: Bug Report
The folder pane scrolling position is not persisted when the first child folder is selected.
Steps to reproduce:
1. Open
2. Add several folders to the last node
3. Scroll down to the bottom and select the first child folder of the last node
Result: The tree is scrolled to top.
Last Updated: 21 Jun 2022 14:56 by ADMIN
have found similar issue :
which look like has been fixed, but unfortunately for following case it doesn't:
We still have performance issue, in following situations:
   - when content root folder contains few (1-5) subfolders
   - one of subfolder contains lot of (200-500) sub-subfolders 

then first time RadFileExplorer  loading to long (aproximatelly 3-5min). after some researching has been found that problem in the method:  

     private bool HasSubFolders(string virtualPath);

which instead of simply check that folder isn't empty (exist any one file or directory)  always construct complete version of the subtree (in the example above - subtree contains 200-500 subfolders, each of them checking for content, permission etc - that is why it takes time). Probable to check that node  HasSubFolders, RadFileExplorer  could execute new virtual method of the FileSystemContentProvider bool HasSubFolders. In that case: FileSystemContentProvider (or inherited classes) will decide that Folder contains SubFolders.
Last Updated: 12 Apr 2022 11:41 by ADMIN
If the FileExplorer is located inside a container with position "absolute" or "fixed" the Scrolling mechanism breaks.
Last Updated: 22 Mar 2022 13:04 by Swapnil
Created by: Swapnil
Comments: 0
Category: FileExplorer
Type: Bug Report

It is not possible to select a Toolbar item in RadFileExplorer on Enter press if the control is used in Lightweight render mode.

Steps to reproduce:

1. Open

2. Press "Ctrl+f2" to focus RadFileExplorer

3. Press "Shift+1" to focus its toolbar

4. Use the Arrow keys to navigate between to Toolbar items

5. Press Enter over a button (e.g. Upload)

Result: The command is not triggered


Workaround: The issue is not reproducible in Classic render mode.

Last Updated: 17 Mar 2022 16:19 by Swapnil

It is not possible to navigate between ContextMenu items with the arrow keys when the Keyboard support is enabled.

The ThreeView remains the focused element even after the ContextMenu is shown and using the arrow keys navigates through the tree nodes instead of the ContextMenu items.

Steps to reproduce.

  1. Click somewhere on the page and press "F" for focus FileExplorer
  2. Press "T" to focus TreeView
  3. Press "C" to show tree context menu
  4. Pres Up/down arrow to navigate through the context menu items

Result: The navigation occurs in the three instead of the Context menu

            <telerik:RadFileExplorer ID="RadFileExplorer1" Height="380px" Width="750px"
                AllowPaging="false" EnableCopy="true" runat="server">
                <Configuration EnableAsyncUpload="true" SearchPatterns="*.*" UploadPaths="~/Images/" DeletePaths="~/Images/" ViewPaths="~/Images/"></Configuration>

Last Updated: 07 Feb 2022 13:41 by Swapnil

FileExplorer does not scroll its tree properly to the programatically selected folders.

Steps to reproduce:

1. Set a nested folder with a long path programatically:


2. Select another nested folder programatically:


Result: The second folder is selected, but the TreeView does not properly scroll into view containing it.

Last Updated: 14 Sep 2021 12:20 by ADMIN
A JavaScriptError is thrown when FileExplorer with enabled AsyncUplaod is used for multiple files uploading in IE. The message of the error is:
JavaScript runtime error: Object doesn't support property or method 'get_allowMultiRowSelection'

Steps to reproduce:
1. Open in IE10
2. Open the FileExplorer's Upload dialog
3. Select 2 or more files for upload
4. Click the Upload button

Result: A JavaScript error is thrown.
Last Updated: 13 Aug 2021 10:00 by ADMIN
Release R1 2016
When users quickly select different folders in the TreeView and content is still loading, the caching mechanism of FileExplorer fails and loads incorrect data to the last selected folder. 
Last Updated: 01 Jun 2021 13:16 by ADMIN
Release Q3 2012
Last Updated: 20 May 2021 19:57 by grill
Release R2 2021 SP1

There is a scroll and the Upload button is partially hidden when the Bootstrap skin is used in Classic render mode:

Last Updated: 03 Nov 2020 11:22 by ADMIN
FileExplorer does not persist the scrolling position of its tree pane when a folder from the tree is selected in LW (and both horizontal and vertical sroll-bars are shown).

video -
Last Updated: 11 Jun 2020 14:27 by ADMIN
Release R2 2020 SP1

Reproduction code:

protected void Page_Load(object sender, EventArgs e)
    RadToolBarDropDown dropDown = new RadToolBarDropDown("PageSize");
    dropDown.CssClass = "perPageDropDown";
    dropDown.EnableImageSprite = false;
    // dropDown.Text = GetGlobalResourceObject("Insight", "Per pagina")
    // dropDown.ToolTip = GetGlobalResourceObject("Insight", "Per pagina")

<telerik:RadFileExplorer RenderMode="Lightweight" runat="server" ID="FileExplorer1" Width="595px" Height="350px"
    AllowPaging="true" PageSize="10">
    <Configuration EnableAsyncUpload="true" ViewPaths="~/"
        UploadPaths="~/" DeletePaths="~/"></Configuration>

Last Updated: 08 May 2020 15:51 by ADMIN
Release R2 2017
Changing the paths of FileExplorer dynamically leads to popping an alert message for "non-existing folder" even in no InitialPath has been set. After closing the alert RadFileExplorer gets bound successfully.


The bug is introduced in version 2015.2.729.

Steps to reproduce:
1. Run the following code:
<telerik:RadFileExplorer ID="RadFileExplorer1" runat="server">
     <Configuration ViewPaths="~/" />
<telerik:RadButton ID="Btn1" runat="server" Text="Change ViewPath" OnClick="Btn1_Click"></telerik:RadButton>

protected void Btn1_Click(object sender, EventArgs e) {
    RadFileExplorer1.InitialPath = "/Bin";
    RadFileExplorer1.Configuration.ViewPaths = new string[] { "~/Bin" };

2. Click the "Change ViewPath" button

Result: FileExplorer shows an alert with message "You are navigating to a non-existing folder or do not have proper permissions..."
Last Updated: 30 Jan 2020 17:07 by ADMIN
Unable to drag and drop in ThumbnailMode when browser zoom level is 90% in Chrome. the problem can be reproduced here:
2. Witch to Thumbnails mode
3. Zoom out the browser to 90%
4. Drag a thumb from the ListView to the TreeView (right to left)
Last Updated: 04 Mar 2019 16:11 by ADMIN
A workaround is to disable the embedded jQuery and use an older version (for example, 1.11.1 which is the previous version the suite used):
Last Updated: 03 Aug 2018 16:39 by Kevin Neumann
A workaround is to disable the embedded jQuery and use an older version (for example, 1.11.1 which is the previous version the suite used):

Repro steps:

1. put a file explorer on the page
2. right click a file in it and select Rename
3. enter a new name, click OK

Expected: file is renamed

Actual: Firefox throws TypeError: access to strict mode caller function is censored

Sample markup

        <telerik:RadFileExplorer RenderMode="Lightweight" runat="server" ID="FileExplorer1" Width="520px" Height="310px">
            <Configuration ViewPaths="~/images" UploadPaths="~/images"
Last Updated: 29 Mar 2018 13:11 by ADMIN
Only half of the Select button (the top part) in Upload dialog is clickable in Material, due to the unsufficient height of the .ruFileInput element.

  html .rfeUploadContainer .RadUpload .ruInputs input.ruFileInput {
    height: 50px;

Steps to reproduce:
1. Open
2. Open the Upload dialog
3. Try to select a file to upload by clicking the bottom half of the button

Result: The file selection window is not opened
Last Updated: 20 Jun 2017 14:49 by Imported User
If the AsyncUpload control is enabled in the FileExplorer when  and the user uploads more that 1 file, the FileExplorer throws a JavaScript error with the following message:

TypeError: this.control.get_allowMultiRowSelection is not a function
Last Updated: 01 Jun 2017 14:17 by ADMIN
The icon of the confirm dialogs in RadFileExplorer should be center aligned to the text.
1 2 3