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POInterface result delphi to c# - class define dll use in c#
 

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  1. POInterface result delphi to c# - class define dll use in c#
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    <p>I have a class define in dll. I export this class by interface. I use this dll and class in other Delphi project very good but I want use this class in c# but send error for me.</p> <p>Source DLL:</p> <pre><code>type IMyDate = interface ['{D032F796-167D-4B0D-851D-2AEEA226646A}'] Procedure Analyze_Date(var y:Integer; m,d:Integer); stdcall; end; TMyDate = Class(TInterfacedObject, IMyDate) Public Procedure Analyze_Date(var y:integer; m,d:Integer); stdcall; End; procedure TMyDate.Analyze_Date(var y:Integer; m, d: Integer); begin y:= m+d; end; Function MyDate:IMyDate; stdcall; begin result:= TMyDate.Create; end; exports MyDate; </code></pre> <p>Unit use in Delphi example:</p> <pre><code>Function MyDate:IMyDate; stdcall; external 'Project11'; implementation procedure TForm3.Button1Click(Sender: TObject); var md:IMyDate; var y,m,d:Integer; begin md:= MyDate; y:=10; m:=20; d:=30; md.Analyze_Date(y,m,d); showMessage(intTostr(y)); end; </code></pre> <p>Use in c# but get error:</p> <pre><code>//[Guid("D032F796-167D-4B0D-851D-2AEEA226646A")] public interface IMyDate { void Analyze_Date(ref int y, int m, int d); } [DllImport( "Project11.dll" , EntryPoint = "MyDate" , SetLastError = true , CallingConvention = CallingConvention.StdCall , CharSet = CharSet.Unicode)] public static extern IMyDate MyDate(); private void button9_Click(object sender, EventArgs e) { int y, m, d; IMyDate da; da = MyDate(); // get error this line y = 10; m = 20; d = 30; da.Analyze_Date(ref y, m, d); } </code></pre> <p><strong>Update</strong></p> <p>thank you for answer</p> <p>i add new function to Interface and class but my function only return false</p> <p>also my function and procedure in delphi is stdcall and interface in C# is normaly !!!</p> <pre><code>IMyDate = interface ['{D032F796-167D-4B0D-851D-2AEEA226646A}'] Function testing():Boolean; stdcall; end; TMyDate = Class(TInterfacedObject, IMyDate) Public Function testing():Boolean; stdcall; End; function TMyDate.testing(): Boolean; begin result:= true; end; </code></pre> <p>c#:</p> <pre><code>[ComImport, Guid("D032F796-167D-4B0D-851D-2AEEA226646A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IMyDate { bool testing(); } [DllImport( "Project11.dll" , EntryPoint = "CreateMyDate"//"MyDate" , SetLastError = true , CallingConvention = CallingConvention.StdCall , CharSet = CharSet.Unicode)] public static extern void CreateMyDate(out IMyDate Date); Boolean b; b = da.testing(); //this line only return false if (b) { MessageBox.Show("ffff"); } </code></pre>
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    1. USDavid Heffernan
    1. USkhoshghadam
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      1. POInterface result delphi to c# - class define dll use in c#
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    2. VO
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      1. POInterface result delphi to c# - class define dll use in c#
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      1. VTDownMod
    1. COCan you tell us the error?
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      1. POInterface result delphi to c# - class define dll use in c#
      1. USDavid Heffernan
    2. COMight be nice to tell us the error... just sayin'... if you want help.
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      1. POInterface result delphi to c# - class define dll use in c#
      1. USHogan
 

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