FileManagerThumbnailCreateEventArgs.ThumbnailImage Property

Gets the settings of a thumbnail image.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v24.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public FileManagerThumbnailProperties ThumbnailImage { get; }

VB.NET

Public ReadOnly Property ThumbnailImage As FileManagerThumbnailProperties

Property Value

Type	Description
FileManagerThumbnailProperties	A FileManagerThumbnailProperties object that contains image settings.

Remarks

The ASPxFileManager allows you to provide custom thumbnails by handling the ASPxFileManager.CustomThumbnail server event. Within the event’s handler, a custom thumbnail can be defined for the currently processed file via the ThumbnailImage property.

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>