XmlDataFileEditor Class
Assembly: System.Design (in system.design.dll)
An XmlDataFileEditor object is used at design time to select and edit a URL for an XML data file (.xml), and then assign the URL to a control property. For example, the XmlDataSource control uses the XmlDataFileEditor class at design time to set the value of the DataFile property.
Use the EditorAttribute attribute to associate the XmlDataFileEditor with a property. When the associated property is edited on the design surface, the designer host calls the EditValue method. The EditValue method uses the BuildUrl method, which in turn displays a user interface for selecting the URL, and then returns the URL that is selected by the user. The GetEditStyle method indicates the display style of the user interface.
Derive a class from the XmlDataFileEditor to define a custom editor for an XML data property. For example, a derived class can override the EditValue method, and then call the BuildUrl method with a custom Filter or Caption value.
The following code example demonstrates how to associate an instance of the XmlDataFileEditor class with a property that is contained within a custom control. When the control property is edited on the design surface, the XmlDataFileEditor class provides the user interface to select and edit an XML file name for the property value.
- SecurityPermission for calling unmanaged code. Demand value: Demand; Associated enumeration: UnmanagedCode.
System.Drawing.Design.UITypeEditor
System.Web.UI.Design.UrlEditor
System.Web.UI.Design.XmlDataFileEditor