![]() My goal is to validate controls without any code! With Validator, you drop it to a form and enter the validation rules for a TextBox or a ComboBox just like using the ToolTip component. It's really a dull assignment, and if there is a lot of controls in your form, it makes maintenance difficult. Validate causes the control's Validating event to be fired, // if CausesValidation is True if (!Validate()) If the Cancel property of the CancelEventArgs is set to true in the Validating event delegate, all events that would usually occur after the Validating event are suppressed.Private void btnOK_Click( object sender, System.EventArgs e)įoreach (Control control in this.Controls) If the CausesValidation property is set to false, the Validating and Validated events are suppressed. 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,
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