Search
Module:
Directory

   Desktop Functions:

   Smart Device Functions:


Show Recent Changes
Subscribe (RSS)
Misc. Pages
Comments
FAQ
Helpful Tools
Playground
Suggested Reading
Website TODO List
Download Visual Studio Add-In

WSAEnumNameSpaceProviders (ws2_32)
 
.
Summary
The WSAEnumNameSpaceProviders function retrieves information on available namespace providers.

C# Signature:

    [DllImport("ws2_32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    [DllImport("ws2_32.dll", CharSet = CharSet.Auto)]
    static extern int WSAEnumNameSpaceProviders(ref int bufferLength, IntPtr nspBuffer);

VB Signature:

Not yet.

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    [StructLayout(LayoutKind.Sequential)]
    public struct WSANAMESPACE_INFOW
    {
        Guid NSProviderId;
        uint dwNameSpace;
        bool fActive;
        uint dwVersion;
        [MarshalAs(UnmanagedType.LPWStr)]
        string lpszIdentifier;
    }

    const int SOCKET_ERROR = -1;

    static IEnumerable<WSANAMESPACE_INFOW> WSAEnumNameSpaceProviders()
    {
        int bytes = 4000;
        IntPtr buffer = Marshal.AllocCoTaskMem(bytes);
        try
        {
            int count = WSAEnumNameSpaceProviders(ref bytes, buffer);
            if (count == SOCKET_ERROR)
            {
                throw new Win32Exception(Marshal.GetLastWin32Error());
                throw new Win32Exception(WSAGetLastError());
            }
            for (int x = 0; x < count; x++)
            {
                yield return (WSANAMESPACE_INFOW)Marshal.PtrToStructure(
                    IntPtr.Add(buffer, x * Marshal.SizeOf(typeof(WSANAMESPACE_INFOW))),
                    typeof(WSANAMESPACE_INFOW)
                    );

            }
        }
        finally
        {
            Marshal.FreeCoTaskMem(buffer);
        }
    }

Documentation

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

 
Access PInvoke.net directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version
Revisions