![]() This->label5->Location = System::Drawing::Point( 264, 64 ) ErrorBlinkStyle::BlinkIfDifferentError Label 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 Die SetError Methode wird abhängig vom Inhalt des Steuerelements abhängig vom Inhalt des Steuerelements Validated mit oder ohne entsprechenden Fehlertext aufgerufen. Im Beispiel werden Fehlersymboloptionen mithilfe der BlinkRate Eigenschaften und BlinkStyle der SetIconAlignment Methoden SetIconPadding festgelegt. Im Beispiel wird ein Form Steuerelement erstellt, das ein TextBox Steuerelement, ein NumericUpDown Steuerelement und ein ComboBox Steuerelement enthält, das jeweils den Inhalt überprüft, und ein ErrorProvider Steuerelement für jedes Steuerelement. Im folgenden Codebeispiel wird die Verwendung der ErrorProvider Klasse veranschaulicht, um den Benutzer über einen Dateneingabefehler zu benachrichtigen. IExtenderProvider ISupportInitialize Beispiele Implements IExtenderProvider, ISupportInitialize Vererbung Implements IExtenderProvider Public Class ErrorProvider Interface ISupportInitialize Public Class ErrorProvider ![]() Public class ErrorProvider :, , type ErrorProvider = class In diesem Artikel 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 :, = ErrorBlinkStyle.Bietet eine Benutzeroberfläche, über die angezeigt werden kann, dass für ein Steuerelement auf einem Formular ein zugeordneter Fehler vorliegt. You can also change the blink style to NeverBlink if you don't want to scare the user. = Icon.FromHandle(((Bitmap)imageList.Images).GetHicon()) If you want to change icon errorprovider c#, you can add an imagelist control to your winform, then set icon to the error provider control as the following c# code. Using c# errorprovider check if error through the Validating event handler. To clear error provider c# you can call the SetError method, then set value to null. If (string.IsNullOrEmpty(txtUsername.Text))ĮrrorProvider.SetError(txtUsername, "Please enter your user name !") ĮrrorProvider.SetError(txtUsername, null) private void txtUsername_Validating(object sender, CancelEventArgs e) MessageBox.Show(txtUsername.Text, "Message", MessageBoxButtons.OK, MessageBoxIcon.Information) Īdd the validating event handler to the TextBox allows you to check validate the TextBox control. If (ValidateChildren(ValidationConstraints.Enabled)) private void btnLogin_Click(object sender, EventArgs e) Next, add the click event handler to the Login button as the following c# code. If an error description string is specified for the control, an icon appears next to the control. ErrorProvider presents a simple mechanism for indicating to the end user that a control on a form has an error associated with it. You need to add an ErrorProvider control to your windows form application. To play the demo, you should create a new windows forms application project, next enter your project name is "ValidateDemo " and then click OK button.ĭrag the TextBox, Label and Button from your visual studio toolbox to your winform, then design a simple UI login form as shown below. Error Provider control that helps you validation data in c# winform.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |