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Frameworks and Libraries
TreeListNodeValidationEventArgs Class
Provides data for the ASPxTreeList.NodeValidating event.
Namespace: DevExpress.Web.ASPxTreeList
Assembly: DevExpress.Web.ASPxTreeList.v19.2.dll
Declaration
public class TreeListNodeValidationEventArgs :
EventArgsPublic Class TreeListNodeValidationEventArgs
Inherits EventArgsExamples
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:
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.";
}
See Also
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