ValidationErrorCollection.HasErrors 屬性

定義

命名空間:

System.Workflow.ComponentModel.Compiler

組件:

System.Workflow.ComponentModel.dll

指出集合是否包含指出編譯錯誤的 ValidationError 物件。

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

public bool HasErrors { get; }

member this.HasErrors : bool

Public ReadOnly Property HasErrors As Boolean

屬性值

Boolean

如果活動已產生驗證錯誤，則為 true，否則為 false。

範例

下列範例將示範如何在自訂驗證常式中建立及管理驗證錯誤集合。

此程式碼範例是 Send Email SDK 範例的一部分，來自 SendMailActivity.cs 檔案。 如需詳細資訊，請參閱 傳送郵件活動。

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

備註

如果 Activity 已產生警告，則將警告視為此屬性內容中的錯誤。