Control.CausesValidation Control.CausesValidation Control.CausesValidation Control.CausesValidation Property

정의

컨트롤이 포커스를 받을 때 유효성 검사가 필요한 모든 컨트롤에 대해 유효성 검사가 수행되도록 하는지를 나타내는 값을 가져오거나 설정합니다.Gets or sets a value indicating whether the control causes validation to be performed on any controls that require validation when it receives focus.

public:
 property bool CausesValidation { bool get(); void set(bool value); };
public bool CausesValidation { get; set; }
member this.CausesValidation : bool with get, set
Public Property CausesValidation As Boolean

속성 값

컨트롤이 포커스를 받을 때 유효성 검사가 필요한 모든 컨트롤에 대해 유효성 검사가 수행되도록 하면 true이고, 그렇지 않으면 false입니다.true if the control causes validation to be performed on any controls requiring validation when it receives focus; otherwise, false. 기본값은 true입니다.The default is true.

예제

다음 코드 예제에서는 파생된 클래스인 TextBox 전자 메일 주소는 사용자가 입력의 유효성을 검사 합니다.The following code example uses the derived class TextBox and validates an email address that the user enters. 전자 메일 주소 형식이 없는 경우 (포함 된 "@" and "."), 유효성 검사에 실패를 ErrorProvider 아이콘이 표시 되며, 이벤트가 취소 되 고 합니다.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. 폼의 단추 중 하나에 해당 CausesValidation 속성이 설정 false합니다.One of the buttons on the form has its CausesValidation property set to false. 클릭이 단추에 포커스를 설정 하거나 유효성 검사를 트리거하지 않습니다.Clicking or setting focus to this button does not trigger validation. 이 예제에서는 TextBox, ErrorProvider 컨트롤 및 Button 폼에 만들었습니다.This example requires that a TextBox, an ErrorProvider control, and a Button have been created on a form.

public:
   Form1()
   {
      InitializeComponent();    
      //Set button2 to be non-validating.
      this->button2->CausesValidation = false;
   }

private:
   void textBox1_Validating( Object^ sender, System::ComponentModel::CancelEventArgs^ e )
   {
      String^ errorMsg;
      if ( !ValidEmailAddress( textBox1->Text, &errorMsg ) )
      {
         // Cancel the event and select the text to be corrected by the user.
         e->Cancel = true;
         textBox1->Select( 0, textBox1->Text->Length );
         
         // Set the ErrorProvider error with the text to display.
         this->errorProvider1->SetError( textBox1, errorMsg );
      }
   }

   void textBox1_Validated( Object^ sender, System::EventArgs^ e )
   {
      // If all conditions have been met, clear the ErrorProvider of errors.
      errorProvider1->SetError( textBox1, "" );
   }

public:
   bool ValidEmailAddress( String^ emailAddress, [Out]interior_ptr<String^> errorMessage )
   {
      // Confirm that the email address String* is not empty.
      if ( emailAddress->Length == 0 )
      {
         *errorMessage = "email address is required.";
         return false;
      }

      // Confirm that there is an "@" and a "." in the email address, and in the correct order.
      if ( emailAddress->IndexOf( "@" ) > -1 )
      {
         if ( emailAddress->IndexOf( ".", emailAddress->IndexOf( "@" ) ) > emailAddress->IndexOf( "@" ) )
         {
            *errorMessage = "";
            return true;
         }
      }

      *errorMessage = "email address must be valid email address format.\n" +
         "For example 'someone@example.com' ";
      return false;
   }
public Form1()
{
    InitializeComponent();
    //Set button2 to be non-validating.
    this.button2.CausesValidation = false;
}


private void textBox1_Validating(object sender, 
 				System.ComponentModel.CancelEventArgs e)
{
   string errorMsg;
   if(!ValidEmailAddress(textBox1.Text, out errorMsg))
   {
      // Cancel the event and select the text to be corrected by the user.
      e.Cancel = true;
      textBox1.Select(0, textBox1.Text.Length);

      // Set the ErrorProvider error with the text to display. 
      this.errorProvider1.SetError(textBox1, errorMsg);
   }
}

private void textBox1_Validated(object sender, System.EventArgs e)
{
   // If all conditions have been met, clear the ErrorProvider of errors.
   errorProvider1.SetError(textBox1, "");
}
public bool ValidEmailAddress(string emailAddress, out string errorMessage)
{
   // Confirm that the email address string is not empty.
   if(emailAddress.Length == 0)
   {
      errorMessage = "email address is required.";
         return false;
   }

   // Confirm that there is an "@" and a "." in the email address, and in the correct order.
   if(emailAddress.IndexOf("@") > -1)
   {
      if(emailAddress.IndexOf(".", emailAddress.IndexOf("@") ) > emailAddress.IndexOf("@") )
      {
         errorMessage = "";
         return true;
      }
   }
   
   errorMessage = "email address must be valid email address format.\n" +
      "For example 'someone@example.com' ";
      return false;
}
    Public Sub New()
        MyBase.New()

        InitializeComponent()
        'Set button2 to be non-validating.
        Me.button2.CausesValidation = False
    End Sub

   Private Function ValidEmailAddress(ByVal emailAddress As String, ByRef errorMessage As String) As Boolean
      ' Confirm there is text in the control.
      If textBox1.Text.Length = 0 Then
         errorMessage = "Email address is required."
         Return False

      End If

      ' Confirm that there is an "@" and a "." in the email address, and in the correct order.
      If emailAddress.IndexOf("@") > -1 Then
         If (emailAddress.IndexOf(".", emailAddress.IndexOf("@")) > emailAddress.IndexOf("@")) Then
            errorMessage = ""
            Return True
         End If
      End If

      errorMessage = "Email address must be valid email address format." + ControlChars.Cr + _
        "For example 'someone@example.com' "
      Return False
End Function

   Private Sub textBox1_Validating(ByVal sender As Object, _
   ByVal e As System.ComponentModel.CancelEventArgs) Handles textBox1.Validating

      Dim errorMsg As String
      If Not ValidEmailAddress(textBox1.Text, errorMsg) Then
         ' Cancel the event and select the text to be corrected by the user.
         e.Cancel = True
         textBox1.Select(0, textBox1.Text.Length)

         ' Set the ErrorProvider error with the text to display. 
         Me.errorProvider1.SetError(textBox1, errorMsg)
      End If
   End Sub


   Private Sub textBox1_Validated(ByVal sender As Object, _
   ByVal e As System.EventArgs) Handles textBox1.Validated
      ' If all conditions have been met, clear the error provider of errors.
      errorProvider1.SetError(textBox1, "")
   End Sub

설명

경우는 CausesValidation 속성이 falseValidatingValidated 이벤트는 표시 되지 않습니다.If the CausesValidation property is set to false, the Validating and Validated events are suppressed.

합니다 CausesValidation 속성 값은 대개로 설정 됩니다 false 도움말 단추와 같은 컨트롤에 대 한 합니다.The CausesValidation property value is typically set to false for controls such as a Help button.

적용 대상

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