FileSystemItem.Key Property

Specifies a file system item's key.

Namespace: DevExtreme.AspNet.Mvc.FileManagement

Assembly: DevExtreme.AspNet.Core.dll


public string Key { get; set; }

Property Value

Type Description

The key.


The following example illustrates how to use the Key property to set a unique key for each file system item inside the GetItems(FileSystemLoadItemOptions) method. Refer to the FileManager - Binding to Entity Framework ORM online demo to see the whole code.

File system provider:

public IEnumerable<FileSystemItem> GetItems(FileSystemLoadItemOptions options) {
    int parentId = ParseKey(options.Directory.Key);
    var fileItems = GetDirectoryContents(parentId);

    var clientItemList = new List<FileSystemItem>();
    foreach(var item in fileItems) {
        var clientItem = new FileSystemItem {
            Key = item.Id.ToString(),
            Name = item.Name,
    return clientItemList;


Online Demos

See Also