Typecasting string to char * in C#

[Vikas K]

Hi, Sorry if this is too basic, Can you please let me know how to typecast string to char* in C#? I need this as Im calling a managed DLL function. Thanks Vikas

[Lost User]

Do you mean char[] ? string s = "abc"; char[] c = s.ToCharArray();

[J a a n s]

Vikas K. wrote:

Im calling a managed DLL function

I don't think that you will be using pointers much in managed environment.

Vikas K. wrote:

string to char*

If you want to call some native C++ functions you can use Marshal.StringToHGlobalAnsi[^] method.

*jaans

[Vikas K]

I mean to char*

[Lost User]

"Managed" ??? Do you want to use pointer in managed environment ???

[Vikas K]

Actually from C# I'm calling an unmanaged MFC DLL. MFC DLL has an API for example: int fnSetMonitorNo(char* m_MonitorNo) int fnGetMonitorNo(char* m_MonitorNo) If I pass char* to the DLL, it will see the MonitorNo. I tried to do in C# as follows [DllImport("OfficeCTE.dll")] public static extern unsafe int fnSetMonitorNo([MarshalAs(UnmanagedType.LPStr)]string arg1); [DllImport("OfficeCTE.dll")] public static extern unsafe int fnGetMonitorNo([MarshalAs(UnmanagedType.LPStr)]string arg1); But it didn't work. How can this be done?