[英]Calling VB6 method from C# from dynamic object with ByRef and optional Parameters
我通常動態地調用類方法而沒有問題,但是只有此方法不起作用,總是返回錯誤:
Dynamic conn = Activator.CreateInstance(Type.GetTypeFromProgID("MyTeam.MyClass"));
bool test = false;
conn.MyFunction(100,"test",DateTime.Now, test, test, "another","another","another");
VB外部類的原始方法:
Public Function MyFunction(ByVal Id As Integer, ByVal Var1 As String, ByVal Fecha As Date,
Optional ByRef Opcion1 As Boolean = False,
Optional ByRef Opcion2 As Boolean = False,
Optional ByVal Var1 As String = "",
Optional ByVal Var2 As String = "",
Optional ByVal Var3 As String = "" ) As String
問題1:是否可以省略可選參數?
問題2:是否可以通過其他方式調用ByRef參數?
更新1:是的,C#支持ref / out參數,但是...“動態”類型調用方法的變量是否支持這種類型的輸入?
為了在c#中傳遞byref,您在調用函數時也需要在參數前加上ref
。
conn.MyFunction(100,"test",DateTime.Now, ref test, ref test, "another","another","another");
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