StrongNameIdentityPermission.Intersect(IPermission) 方法

定義

命名空間:

System.Security.Permissions

組件:

System.Security.Permissions.dll

套件:

System.Security.Permissions v9.0.0-rc.2.24473.5

來源:

StrongNameIdentityPermission.cs

建立並傳回目前權限與指定權限交集的權限。

public:
 override System::Security::IPermission ^ Intersect(System::Security::IPermission ^ target);

public override System.Security.IPermission Intersect (System.Security.IPermission target);

override this.Intersect : System.Security.IPermission -> System.Security.IPermission

Public Overrides Function Intersect (target As IPermission) As IPermission

參數

target

IPermission

要與目前權限產生交集的權限。 必須與目前權限屬於相同的類型。

傳回

IPermission

代表目前權限與指定權限交集的新權限；如果交集是空的，則為 null。

例外狀況

ArgumentException

target 參數不是 null，而且與目前權限屬於不同的類型。

範例

下列程式代碼範例顯示使用 Intersect 方法的結果，而不是如何使用 方法。 這個範例是提供給 類別之較大範例的 StrongNameIdentityPermission 一部分。 此範例的最佳用法是建置和執行整個範例，並檢視其輸出。

注意

程式代碼範例旨在顯示 方法的行為，而不是示範其用法。 一般而言，安全性基礎結構會使用許可權類別的方法;它們通常不會用於應用程式。

// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
bool IntersectDemo()
{
    bool returnValue = true;
    StrongNameIdentityPermission^ snIdPerm1;
    StrongNameIdentityPermission^ snIdPerm2;
    StrongNameIdentityPermission^ snIdPerm3;
    snIdPerm1 = gcnew StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", gcnew Version("1.0.0.0"));
    snIdPerm2 = gcnew StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.MyFile", gcnew Version("1.0.0.0"));

    try
    {

        snIdPerm3 = dynamic_cast<StrongNameIdentityPermission^>(snIdPerm1->Intersect(snIdPerm2));

        Console::WriteLine("The intersection of MyCompany.MyDepartment.*" +
            "and MyCompany.MyDepartment.MyFile is " +
            (dynamic_cast<StrongNameIdentityPermission^>(snIdPerm3))->Name);
    }
    catch (Exception^ e)
    {
        Console::WriteLine("An exception was thrown: " + e);
        returnValue = false;
    }

    return returnValue;

}

// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
private bool IntersectDemo()
{

    bool returnValue = true;

    StrongNameIdentityPermission snIdPerm1, snIdPerm2, snIdPerm3;

    snIdPerm1 = new StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", new Version("1.0.0.0"));
    snIdPerm2 = new StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.MyFile", new Version("1.0.0.0"));

    try
    {

        snIdPerm3 = (StrongNameIdentityPermission)snIdPerm1.Intersect(snIdPerm2);

        Console.WriteLine("The intersection of MyCompany.MyDepartment.*"
        + "MyCompany.MyDepartment.MyFile is "
        + ((StrongNameIdentityPermission)snIdPerm3).Name.ToString());
    }
    catch (Exception e)
    {
        Console.WriteLine("An exception was thrown: " + e);
        returnValue = false;
    }

    return returnValue;
}

' Intersect creates and returns a new permission that is the intersection of the current
' permission and the permission specified.
Private Function IntersectDemo() As Boolean 
    
    Dim returnValue As Boolean = True
    
    Dim snIdPerm1, snIdPerm2, snIdPerm3 As StrongNameIdentityPermission
    
    snIdPerm1 = New StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", New Version("1.0.0.0"))
    snIdPerm2 = New StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.MyFile", New Version("1.0.0.0"))
    
    Try
        
        snIdPerm3 = CType(snIdPerm1.Intersect(snIdPerm2), StrongNameIdentityPermission)
        
        Console.WriteLine("The intersection of MyCompany.MyDepartment.*" + "MyCompany.MyDepartment.MyFile is " + CType(snIdPerm3, StrongNameIdentityPermission).Name.ToString())
    
    Catch e As Exception
        Console.WriteLine("An exception was thrown: " + e.ToString())
        returnValue = False
    End Try
    
    Return returnValue

End Function 'IntersectDemo

備註

兩個許可權的交集是描述兩者共同描述之作業集的許可權。 只有傳遞兩個原始許可權的要求才會通過交集。

兩個相同強名稱識別許可權的交集是相同的許可權。 兩個不同 (非通配符) 表達式的交集是空許可權。 通配符表達式和相符強名稱的交集是強名稱。 符合的兩個通配符表達式交集是兩個表達式的較長時間，更具體。