/// <summary>
/// Set the content for the specified format.
/// You will need to "lock" (OpenClipboard) the clipboard before calling this.
/// </summary>
/// <param name="format">the format to set the content for</param>
/// <param name="stream">MemoryStream with the content</param>
public static void SetAsStream(string format, MemoryStream stream)
{
uint formatId;
if (!Format2Id.TryGetValue(format, out formatId))
{
formatId = RegisterFormat(format);
}
var length = stream.Length;
var hGlobal = Kernel32Api.GlobalAlloc(GlobalMemorySettings.ZeroInit | GlobalMemorySettings.Movable, new UIntPtr((ulong)length));
if (hGlobal == IntPtr.Zero)
{
throw new Win32Exception();
}
var memoryPtr = Kernel32Api.GlobalLock(hGlobal);
try
{
if (memoryPtr == IntPtr.Zero)
{
throw new Win32Exception();
}
// Fill the global memory
Marshal.Copy(stream.GetBuffer(), 0, memoryPtr, (int)length);
}
finally
{
Kernel32Api.GlobalUnlock(hGlobal);
}
// Place the content on the clipboard
NativeMethods.SetClipboardData(formatId, hGlobal);
}
/// <summary>
/// Retrieve the content for the specified format.
/// You will need to "lock" (OpenClipboard) the clipboard before calling this.
/// </summary>
/// <param name="format">the format to retrieve the content for</param>
/// <returns>MemoryStream</returns>
public static MemoryStream GetAsStream(string format)
{
uint formatId;
if (!Format2Id.TryGetValue(format, out formatId))
{
formatId = RegisterFormat(format);
}
var hGlobal = NativeMethods.GetClipboardData(formatId);
var memoryPtr = Kernel32Api.GlobalLock(hGlobal);
try
{
if (memoryPtr == IntPtr.Zero)
{
throw new Win32Exception();
}
var size = Kernel32Api.GlobalSize(hGlobal);
var stream = new MemoryStream(size);
stream.SetLength(size);
// Fill the memory stream
Marshal.Copy(memoryPtr, stream.GetBuffer(), 0, size);
return(stream);
}
finally
{
Kernel32Api.GlobalUnlock(hGlobal);
}
}
/// <summary>
/// Cleanup this native info by unlocking the global handle
/// </summary>
public void Dispose()
{
Kernel32Api.GlobalUnlock(GlobalHandle);
if (NeedsWrite)
{
// Place the content on the clipboard
NativeMethods.SetClipboardData(FormatId, GlobalHandle);
}
}
