ValidationEventArgs.SetError(Object) Method

Marks the processed input value as invalid and displays an error within the editor.

Namespace: DevExpress.Xpf.Editors

Assembly: DevExpress.Xpf.Core.v21.2.dll


public void SetError(
    object errorContent


Name Type Description
errorContent Object

An object that specifies the error content.


The SetError method automatically sets the ValidationEventArgs.IsValid property to false. If the errorContent parameter is set to an empty string or null, the ValidationEventArgs.IsValid property is set to true and the error isn’t displayed.

private void textEdit_Validate(object sender, ValidationEventArgs e) {
    if(Convert.ToDouble(e.Value) < 0)
        e.SetError("Negative values are not allowed.");

The image below shows the result:


See Also