Events
This article lists the events specific to all of the RadFileDialog controls.
-
PreviewClosed: This event occurs when the dialog is closing. The event arguments are of type WindowPreviewClosedEventArgs. You can use the arguments to cancel the event.
Example 1: Cancel dialog closing
private void FileDialog_PreviewClosed(object sender, WindowPreviewClosedEventArgs e) { e.Cancel = true; } Closed: This event occurs when the dialog is closed. The event arguments are of type WindowClosedEventArgs.
-
ExceptionRaised: This event occurs when an exception is raised. This event could be raised in different occasions, for example - if the selected folder cannot be accessed or if the file path is too long, or when there is an error while searching, etc.
Example 2: Showing an alert when an error appears
private void openDialog_ExceptionRaised(object sender, FileBrowserExceptionRaisedEventArgs e) { MessageBox.Show(e.Exception.Message); } -
DirectoryRequesting: This event can be used to filter the navigation RadTreeView and RadBreadcrumb or any Custom Places that are added. The following example demonstrates how you can filter out the "D:\" and "K:\" directories:
Example 3: Filtering the D and K directories
private void OpenFileDialog_DirectoryRequesting(object sender, Telerik.Windows.Controls.FileDialogs.DirectoryRequestingEventArgs e) { if (e.Directory.FullName.StartsWith("D:\\") || e.Directory.FullName.StartsWith("K:\\")) { e.Cancel = true; } }If the InitialDirectory of the RadFileDialog is filtered out as in Example 3, the current directory on load will be the default one.
Figure 1: Unfiltered Directories
Figure 2: Filtered Directories Based on Example 3
-
DirectoryNavigating: This event occurs when the current folder is about to change. You can use it to execute an additional action or to cancel the navigation.
Example 4: Disable navigation to the Program Files folder
private void OpenFileDialog_DirectoryNavigating(object sender, Telerik.Windows.Controls.FileDialogs.DirectoryNavigatingEventArgs e) { if (e.DirectoryPath == "C:\\Program Files") { e.Cancel = true; } } -
ShellContextMenuOpening: This event occurs when the context menu is about to open. You can use it to cancel the menu opening or to add/remove options from the short menu (the one opened when the cursor is on an empty space in the explorer).
Example 5: Canceling context menu opening and adding only New Folder and Paste options in the short menu
private void OpenFileDialog_ShellContextMenuOpening(object sender, Telerik.Windows.Controls.FileDialogs.ContextMenuOpeningEventArgs e) { if (e.SelectedFiles.Count > 0 && e.SelectedFiles[0].Path == "C:\\Program Files") { e.Cancel = true; } else { e.ShortContextMenuOptions = ShortContextMenuOptions.Paste | ShortContextMenuOptions.NewFolder; } }Additional feature of the ContextMenuOpeningEventArgs provided with the ShellContextMenuOpening event handler is the IsOpeningOnEmptySpace property. You can use this to determine whether the mouse clicked on a file/folder or on empty space in the files list.
Example 6: Checking if the click was on an empty space
private void OpenFileDialog_ShellContextMenuOpening(object sender, Telerik.Windows.Controls.FileDialogs.ContextMenuOpeningEventArgs e) { if (e.IsOpeningOnEmptySpace) { // do something } }