FileManagerFile.Extension Property

Gets the string that specifies the extension of the file.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v23.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public string Extension { get; }

VB.NET

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#

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>