![]() When you change the focus by using the mouse or by calling the Focus method, focus events occur in the following order: When you change the focus by using the keyboard (TAB, SHIFT+TAB, and so on), by calling the Select or SelectNextControl methods, or by setting the ContainerControl.ActiveControl property to the current form, focus events occur in the following order: ' If all conditions have been met, clear the error provider of errors. Private Sub textBox1_Validated(ByVal sender As Object, _īyVal e As System.EventArgs) Handles textBox1.Validated Me.errorProvider1.SetError(textBox1, errorMsg) ' Set the ErrorProvider error with the text to display. ' Cancel the event and select the text to be corrected by the user. If Not ValidEmailAddress(textBox1.Text, errorMsg) Then Private Sub textBox1_Validating(ByVal sender As Object, _īyVal e As ) Handles textBox1.Validating ' Confirm that there is an and a "." in the email address, and in the correct order.ĮrrorMessage = "Email address must be valid email address format." + ControlChars.Cr + _ Private Function ValidEmailAddress(ByVal emailAddress As String, ByRef errorMessage As String) As BooleanĮrrorMessage = "Email address is required." Confirm that there is an and a "." in the email address, and in the correct > -1)ĮrrorMessage = "email address must be valid email address format.\n" + Confirm that the email address string is not empty.ĮrrorMessage = "email address is required." Public bool ValidEmailAddress(string emailAddress, out string errorMessage) Private void textBox1_Validated(object sender, System.EventArgs e) If(!ValidEmailAddress(textBox1.Text, out errorMsg)) Private void textBox1_Validating(object sender, ![]() *errorMessage = "email address must be valid email address format.\n" + If ( emailAddress->IndexOf( ".", emailAddress->IndexOf( ) ) > emailAddress->IndexOf( ) ) Confirm that there is an and a "." in the email address, and in the correct order. *errorMessage = "email address is required." ![]() Confirm that the email address String* is not empty. If all conditions have been met, clear the ErrorProvider of errors.ĮrrorProvider1->SetError( textBox1, "" ) īool ValidEmailAddress( String^ emailAddress, interior_ptr errorMessage ) Void textBox1_Validated( Object^ sender, System::EventArgs^ e ) This->errorProvider1->SetError( textBox1, errorMsg ) Set the ErrorProvider error with the text to display. TextBox1->Select( 0, textBox1->Text->Length ) Cancel the event and select the text to be corrected by the user. If ( !ValidEmailAddress( textBox1->Text, &errorMsg ) ) Void textBox1_Validating( Object^ sender, System::ComponentModel::CancelEventArgs^ e ) This example requires that a TextBox and ErrorProvider control have been created on a form. If the email address is not in the standard format (containing and "."), the validation fails, an ErrorProvider icon is displayed, and the event is canceled. The following code example uses the derived class TextBox and validates an email address that the user enters. public:Įvent EventHandler ^ Validated public event EventHandler Validated public event EventHandler? Validated member this.Validated : EventHandler Public Custom Event Validated As EventHandler Event Type EventHandler Examples Occurs when the control is finished validating.
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