TreeListNodeValidationEventArgs Class

Provides data for the ASPxTreeList.NodeValidating event.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v19.2.dll

Declaration

public class TreeListNodeValidationEventArgs :
    EventArgs
Public Class TreeListNodeValidationEventArgs
    Inherits EventArgs

Examples

This example demonstrates how to check the validity of data entered by end-users into a node. Validation is implemented within the ASPxTreeList.NodeValidating event handler. In this sample, validation fails in the cases listed below:

  • the department isn't specified;
  • the budget is negative.

The image below shows the result:

NodeValidation

protected void ASPxTreeList1_NodeValidating(object sender, TreeListNodeValidationEventArgs e) {
    if ((int)e.NewValues["Budget"] < 0)
        e.Errors["Budget"] = "Negative values aren't allowed";
    if (e.NewValues["Department"] == null)
        e.Errors["Department"] = "Required field";
    if (e.Errors.Count != 0)
        e.NodeError = "Node update failed. Please check node values.";
}

Inheritance

Object
EventArgs
TreeListNodeValidationEventArgs
See Also