FileManagerFile.Extension Property

Gets the string that specifies the extension of the file.

Assembly : DevExpress.Web.v25.2.dll

Declaration

C#
VB.NET

csharp

public string Extension { get; }

Public ReadOnly Property Extension As String

Property Value

Type	Description
String

A String specifying a file extension, including the leading dot.

Example

In the example below, the CustomThumbnail event is handled to analyze file extensions and represent each file type using the corresponding custom thumbnail image.

C#
ASPX

csharp

public void ASPxFileManager1_CustomThumbnail(object source, DevExpress.Web.FileManagerThumbnailCreateEventArgs e) {
        switch(((FileManagerFile)e.Item).Extension) {
            case ".avi":
                e.ThumbnailImage.Url = "Images/movie.png";
                break;
            case ".zip":
                e.ThumbnailImage.Url = "Images/archive.png";
                break;
            case ".txt":
                e.ThumbnailImage.Url = "Images/txt.png";
                break;
            case ".rtf":
                e.ThumbnailImage.Url = "Images/richtxt.png";
                break;
            case ".mp3":
                e.ThumbnailImage.Url = "Images/music.png";
                break;
            case ".xml":
                e.ThumbnailImage.Url = "Images/code.png";
                break;
        }
}

aspx

<dx:ASPxFileManager ID="ASPxFileManager1" runat="server" OnCustomThumbnail="ASPxFileManager1_CustomThumbnail">
        <Settings RootFolder="~/Content/FileManager/Files" ThumbnailFolder="~/Content/FileManager/Thumbnails"
            AllowedFileExtensions=".jpg,.rtf,.txt,.avi,.png,.mp3,.xml" InitialFolder="Documents" />
        <SettingsUpload Enabled="false"></SettingsUpload>
</dx:ASPxFileManager>