ValidationErrorCollection.HasErrors Properti

Definisi

Ruang nama:

System.Workflow.ComponentModel.Compiler

Rakitan:

System.Workflow.ComponentModel.dll

Menunjukkan apakah koleksi berisi ValidationError objek yang menunjukkan kesalahan kompilasi.

public:
 property bool HasErrors { bool get(); };

public bool HasErrors { get; }

member this.HasErrors : bool

Public ReadOnly Property HasErrors As Boolean

Nilai Properti

Boolean

true jika aktivitas telah menghasilkan kesalahan validasi; jika tidak, false.

Contoh

Contoh berikut menunjukkan cara membuat dan memanipulasi kumpulan kesalahan validasi sebagai bagian dari rutinitas validasi kustom.

Contoh kode ini adalah bagian dari sampel Kirim Email SDK dan berasal dari file SendMailActivity.cs. Untuk informasi selengkapnya, lihat Aktivitas Kirim Email.

public class SendEmailValidator : System.Workflow.ComponentModel.Compiler.ActivityValidator
{
    // Define private constants for the Validation Errors
    private const int InvalidToAddress = 1;
    private const int InvalidFromAddress = 2;
    private const int InvalidSMTPPort = 3;

    //customizing the default activity validation
    public override ValidationErrorCollection ValidateProperties(ValidationManager manager, object obj)
    {

        // Create a new collection for storing the validation errors
        ValidationErrorCollection validationErrors = base.ValidateProperties(manager, obj);

        SendEmailActivity activity = obj as SendEmailActivity;
        if (activity != null)
        {
            // Validate the Email and SMTP Properties
            this.ValidateEmailProperties(validationErrors, activity);
            this.ValidateSMTPProperties(validationErrors, activity);
        }
        return validationErrors;
    }

Public Class SendEmailValidator
    Inherits System.Workflow.ComponentModel.Compiler.ActivityValidator

    ' Define private constants for the Validation Errors 
    Private Const InvalidToAddress As Integer = 1
    Private Const InvalidFromAddress As Integer = 2
    Private Const InvalidSMTPPort As Integer = 3

    ' customizing the default activity validation
    Public Overrides Function ValidateProperties(ByVal manager As ValidationManager, ByVal obj As Object) As ValidationErrorCollection

        ' Create a new collection for storing the validation errors
        Dim validationErrors As New ValidationErrorCollection()

        Dim activity As SendEmailActivity = TryCast(obj, SendEmailActivity)

        If activity IsNot Nothing Then

            ' Validate the Email and SMTP Properties
            Me.ValidateEmailProperties(validationErrors, activity)
            Me.ValidateSMTPProperties(validationErrors, activity)

            ' Raise an exception if we have ValidationErrors
            If validationErrors.HasErrors Then

                Dim validationErrorsMessage As String = String.Empty

                For Each validationError As ValidationError In validationErrors
                    validationErrorsMessage += _
                        String.Format("Validation Error:  Number 0} - '1}' \n", _
                        validationError.ErrorNumber, validationError.ErrorText)
                Next

                ' Throw a new exception with the validation errors.
                Throw New InvalidOperationException(validationErrorsMessage)
            End If
        End If
        Return validationErrors
    End Function

Keterangan

Activity Jika telah menghasilkan peringatan, peringatan dianggap sebagai kesalahan dalam konteks properti ini.