操作Editor

using DevExpress.ExpressApp.Web.Editors;
using DevExpress.Web.ASPxEditors;
using DevExpress.ExpressApp.Utils;
// ...
private void WebNullTextEditorController_Activated(object sender, EventArgs e) {
    WebPropertyEditor propertyEditor = 
        ((DetailView)View).FindItem("Anniversary") as WebPropertyEditor;
    if(propertyEditor != null) {
        if(propertyEditor.Control != null) {
            InitNullText(propertyEditor);
        }
        else {
            propertyEditor.ControlCreated += 
                new EventHandler<EventArgs>(propertyEditor_ControlCreated);
        }
    }
}
private void propertyEditor_ControlCreated(object sender, EventArgs e) {
    InitNullText((WebPropertyEditor)sender);
}
private void InitNullText(WebPropertyEditor propertyEditor) {
    if(propertyEditor.ViewEditMode == DevExpress.ExpressApp.Editors.ViewEditMode.Edit) {
        ((ASPxDateEdit)propertyEditor.Editor).NullText = CaptionHelper.NullValueText;
    }
}

• In the code above, the editor associated with the Anniversary property displays "N/A" text when the property value is not set.