IIdentifierCreationService.ValidateIdentifier(Activity, String) 方法

定义

命名空间:

System.Workflow.ComponentModel.Design

程序集:

System.Workflow.ComponentModel.dll

提供一个用于测试标识符在 Activity 中是否唯一的机制。

public:
 void ValidateIdentifier(System::Workflow::ComponentModel::Activity ^ activity, System::String ^ identifier);

public void ValidateIdentifier (System.Workflow.ComponentModel.Activity activity, string identifier);

abstract member ValidateIdentifier : System.Workflow.ComponentModel.Activity * string -> unit

Public Sub ValidateIdentifier (activity As Activity, identifier As String)

参数

activity

Activity

在测试标识符时所针对的 Activity。

identifier

String

要测试其有效性的标识符。

示例

下面的示例演示 IIdentifierCreationService 的实现。 此服务确保当前工作流中使用的每个标识符都是唯一的。

void IIdentifierCreationService.ValidateIdentifier(Activity activity, string identifier)
{
    if (identifier == null)
        throw new ArgumentNullException("identifier");
    if (activity == null)
        throw new ArgumentNullException("activity");

    if (activity.Name.ToLower().Equals(identifier.ToLower()))
        return;

    ArrayList identifiers = new ArrayList();
    Activity rootActivity = GetRootActivity(activity);
    identifiers.AddRange(GetIdentifiersInCompositeActivity(rootActivity as CompositeActivity));
    identifiers.Sort();
    if (identifiers.BinarySearch(identifier.ToLower(), StringComparer.OrdinalIgnoreCase) >= 0)
        throw new ArgumentException(string.Format("Duplicate Component Identifier {0}", identifier));
}

Sub ValidateIdentifier(ByVal activity As Activity, ByVal identifier As String) Implements IIdentifierCreationService.ValidateIdentifier
    If identifier Is Nothing Then
        Throw New ArgumentNullException("identifier")
    End If
    If activity Is Nothing Then
        Throw New ArgumentNullException("activity")
    End If
    If activity.Name.ToLower().Equals(identifier.ToLower()) Then
        Return
    End If
    Dim identifiers As New ArrayList()
    Dim rootActivity As Activity = GetRootActivity(activity)
    identifiers.AddRange(GetIdentifiersInCompositeActivity(CType(rootActivity, CompositeActivity)))
    identifiers.Sort()
    If identifiers.BinarySearch(identifier.ToLower(), StringComparer.OrdinalIgnoreCase) >= 0 Then
        Throw New ArgumentException(String.Format("Duplicate Component Identifier 0}", identifier))
    End If
End Sub

注解

使用 ValidateIdentifier 可确保要在指定的 Activity 中使用的标识符是唯一的且格式正确。