ASPxFileManager.CustomCallback Event

Fires when a round trip to the server has been initiated by a call to the client ASPxClientFileManager.PerformCallback method.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v23.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public event CallbackEventHandlerBase CustomCallback

VB.NET

Public Event CustomCallback As CallbackEventHandlerBase

Event Data

The CustomCallback event's data class is CallbackEventArgsBase. The following properties provide information specific to this event:

Property	Description
Parameter	Gets a string that contains specific information (if any) passed from the client side.

Remarks

The CustomCallback event allows you to perform server-side processing in response to a call to the client ASPxClientFileManager.PerformCallback method.

Use the CallbackEventArgsBase.Parameter property to pass specific information from the client side.

Use the ASPxClientFileManager.BeginCallback and ASPxClientFileManager.EndCallback client events to perform actions on the client side before and after a callback.

Example

Note

For a full example, see the ASPxFileManager - Custom filter API demo.

ASPX

<dx:ASPxFileManager ID="FileManager" runat="server"  OnCustomCallback="FileManager_CustomCallback" >
    ...
</dx:ASPxFileManager>

C#

protected void FileManager_CustomCallback(object sender, CallbackEventArgsBase e) {
    FileManager.FilterBoxText = string.Empty;
    if(string.IsNullOrEmpty(e.Parameter)) {
        FileManager.FileListCustomFilter = string.Empty;
        FileManager.FileListCustomFilterBreadcrumbsText = string.Empty;
    } else {
        string[] filterArgs = e.Parameter.Split('|');
        FileManager.FileListCustomFilter = filterArgs[0];
        FileManager.FileListCustomFilterBreadcrumbsText = filterArgs[1];
    }
}