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ActivityValidator 類別

  • 參考

定義

命名空間:
System.Workflow.ComponentModel.Compiler
組件:
System.Workflow.ComponentModel.dll

警告

The System.Workflow.* types are deprecated. Instead, please use the new types from System.Activities.*

DependencyObjectValidator 的衍生，為所有活動驗證程式元件的基底類別。

public ref class ActivityValidator : System::Workflow::ComponentModel::Compiler::DependencyObjectValidator
public class ActivityValidator : System.Workflow.ComponentModel.Compiler.DependencyObjectValidator
[System.Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
public class ActivityValidator : System.Workflow.ComponentModel.Compiler.DependencyObjectValidator
type ActivityValidator = class
    inherit DependencyObjectValidator
[<System.Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")>]
type ActivityValidator = class
    inherit DependencyObjectValidator
Public Class ActivityValidator
Inherits DependencyObjectValidator
繼承
Object
Validator
DependencyObjectValidator
ActivityValidator
衍生
屬性
ObsoleteAttribute

範例

下列範例顯示用於自訂活動的完整 ActivityValidator。 自訂活動是 ConsoleWriteLineActivity 活動，並具備名為 Msg 且型別為 String 的單一相依屬性。 驗證程式可確保有設定 Msg 屬性。 若未設定，編譯器會在 Validate 上呼叫 ActivityValidator 方法時顯示錯誤，編譯也將失敗。

class ConsoleWriteLineActivityValidator : ActivityValidator
{
    public override ValidationErrorCollection Validate(ValidationManager manager, object obj)
    {
        // Invoke the base class method implementation to
        // perform default validation.
        ValidationErrorCollection errors = base.Validate(manager, obj);

        // Make sure there is an activity instance.
        ConsoleWriteLineActivity crw = obj as ConsoleWriteLineActivity;
        if (crw == null)
        {
            throw new InvalidOperationException();
        }

        // If the activity has no parent then this validation
        // is occurring during the compilation of the activity
        // and not during the hosting or creation of an
        // activity instance.
        if (crw.Parent == null)
        {
            // Can skip the rest of the validation because
            // it deals with the hosting and the creation
            // of the activity.
            return errors;
        }

        // Msg is required. Add a validation error if there is no
        // Msg specified or Msg is not bound to another property.
        if (string.IsNullOrEmpty(crw.Msg) &&
            crw.GetBinding(ConsoleWriteLineActivity.MsgProperty) == null)
        {
            errors.Add(new ValidationError("Msg is required", 100, false, "Msg"));
        }

        return errors;
    }
}

Class ConsoleWriteLineActivityValidator
    Inherits ActivityValidator

    Public Overrides Function Validate( _
        ByVal manager As System.Workflow.ComponentModel.Compiler.ValidationManager, _
        ByVal obj As Object) As System.Workflow.ComponentModel.Compiler.ValidationErrorCollection

        'Invoke the base class method implementation to
        'perform default validation.
        Dim errors As ValidationErrorCollection = MyBase.Validate(manager, obj)

        'Make sure there is an activity instance.
        Dim crw As ConsoleWriteLineActivity = CType(obj, ConsoleWriteLineActivity)
        If crw Is Nothing Then
            Throw New InvalidOperationException()
        End If

        'If the activity has no parent then this validation
        'is occurring during the compilation of the activity
        'and not during the hosting or creation of an
        'activity instance.
        If crw.Parent Is Nothing Then
            'Can skip the rest of the validation because
            'it deals with the hosting and the creation
            'of the activity.
            Return errors
        End If

        'Msg is required. Add a validation error if there is no
        'Msg specified or Msg is not bound to another property.
        If String.IsNullOrEmpty(crw.Msg) And _
            crw.GetBinding(ConsoleWriteLineActivity.MsgProperty) Is Nothing Then

            errors.Add(New ValidationError("Msg is required", 100, False, "Msg"))

        End If

        Return errors
    End Function
End Class

備註

注意

此資料討論已被汰換的類型及命名空間。 如需詳細資訊，請參閱 Windows Workflow Foundation 4.5 中即將淘汰的類型。

建構函式

ActivityValidator()

初始化 ActivityValidator 類別的新執行個體。

方法

Equals(Object)

判斷指定的物件是否等於目前的物件。

(繼承來源 Object)
GetFullPropertyName(ValidationManager)

Helper 方法，可擷取完整的屬性名稱。

(繼承來源 Validator)
GetHashCode()

做為預設雜湊函式。

(繼承來源 Object)
GetType()

取得目前執行個體的 Type。

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。

(繼承來源 Object)
ToString()

傳回代表目前物件的字串。

(繼承來源 Object)
Validate(ValidationManager, Object)

驗證指定的活動是否有效。
ValidateActivityChange(Activity, ActivityChangeAction)

在衍生類別中覆寫時，會根據所指定要加入或移除的 Activity 驗證變更。 在動態更新期間，對工作流程進行應用程式變更時，會呼叫這個函式。

(繼承來源 Validator)
ValidateProperties(ValidationManager, Object)

Helper 方法，可自動驗證特定物件屬性。

(繼承來源 Validator)
ValidateProperty(PropertyInfo, Object, Object, ValidationManager)

執行屬性驗證，並傳回包含驗證結果的 ValidationErrorCollection。

(繼承來源 Validator)

適用於