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This->label4->Text = "ErrorBlinkStyle::AlwaysBlink" This->label4->Location = System::Drawing::Point( 264, 32 ) This->label3->Location = System::Drawing::Point( 24, 96 ) This->label2->Location = System::Drawing::Point( 40, 64 ) This->label1->Location = System::Drawing::Point( 56, 32 ) This->label6 = gcnew System::Windows::Forms::Label This->label5 = gcnew System::Windows::Forms::Label This->label4 = gcnew System::Windows::Forms::Label This->label3 = gcnew System::Windows::Forms::Label

This->favoriteColorComboBox = gcnew System::Windows::Forms::ComboBox This->ageUpDownPicker = gcnew System::Windows::Forms::NumericUpDown This->label2 = gcnew System::Windows::Forms::Label This->label1 = gcnew System::Windows::Forms::Label This->nameTextBox1 = gcnew System::Windows::Forms::TextBox System::Windows::Forms::ErrorProvider^ favoriteColorErrorProvider System::Windows::Forms::ErrorProvider^ nameErrorProvider System::Windows::Forms::ErrorProvider^ ageErrorProvider System::Windows::Forms::ComboBox^ favoriteColorComboBox System::Windows::Forms::NumericUpDown^ ageUpDownPicker System::Windows::Forms::TextBox^ nameTextBox1 Public ref class Form1: public System::Windows::Forms::Form Se SetError llama al método con o sin texto de error adecuado durante el evento de Validated un control, en función del contenido del control. En el ejemplo se establecen las opciones de icono de error mediante las BlinkRate propiedades y BlinkStyle y los SetIconAlignment métodos y SetIconPadding. En el ejemplo se crea un Form objeto que contiene un TextBox control, un NumericUpDown control y un ComboBox control, cada uno validando su contenido y un ErrorProvider para cada control. IExtenderProvider ISupportInitialize EjemplosĮn el ejemplo de código siguiente se muestra cómo usar la ErrorProvider clase para notificar al usuario un error de entrada de datos. Implements IExtenderProvider, ISupportInitialize Herencia Implements IExtenderProvider Public Class ErrorProvider Interface ISupportInitialize Public Class ErrorProvider Public class ErrorProvider :, , type ErrorProvider = class public ref class ErrorProvider : System::ComponentModel::Component, System::ComponentModel::IExtenderProvider public ref class ErrorProvider : System::ComponentModel::Component, System::ComponentModel::IExtenderProvider, System::ComponentModel::ISupportInitialize public class ErrorProvider :, Proporciona una interfaz de usuario para indicar que un control de un formulario tiene un error asociado al mismo. protected override ValidationResult IsValid( object value, ValidationContext validationContext).class CustomAttribute : ValidationAttribute.

I look like the way I'm not invoking the validation correctly. Please note the second I try to modify Property B the error provider disappears. When blanking property A, the error provider goes away from txtBoxA and stays around txtBoxB even though I triggered the validation of property B after property A is set. When Property A has a value and property gets updated, the error provider appears around the two boxes, which is perfectly fine. The problem is that error provider is not updating. To solve this issue I called the Validator.ValidateProperty in the property setter to validate property A when B is set and vise versa. Upon Blanking property B, property A should become valid and vise versa. In other words: If Property A is set to something and property B already has a value, then property A and B becomes invalid. The requirements is to have at least one property null. I have a CSLA object with two managed properties and a custom Attribute.