public string this[int columnIndex]
{
get
{
if (!this.owner.IsHandleCreated)
{
return("");
}
NativeMethods.HDTEXTFILTER hdtextfilter = default(NativeMethods.HDTEXTFILTER);
hdtextfilter.pszText = new string(new char[256 * Marshal.SystemDefaultCharSize]);
hdtextfilter.cchTextMax = 256;
IntPtr intPtr = Marshal.AllocHGlobal(Marshal.SizeOf(hdtextfilter));
string pszText;
try
{
Marshal.StructureToPtr(hdtextfilter, intPtr, false);
InternalNativeMethods.HDITEM hditem = default(InternalNativeMethods.HDITEM);
hditem.mask = 256U;
hditem.pvFilter = intPtr;
InternalUnsafeNativeMethods.SendMessage(this.owner.HeaderHandle, NativeMethods.HDM_GETITEM, (IntPtr)columnIndex, ref hditem);
pszText = ((NativeMethods.HDTEXTFILTER)Marshal.PtrToStructure(intPtr, typeof(NativeMethods.HDTEXTFILTER))).pszText;
}
finally
{
Marshal.FreeHGlobal(intPtr);
}
return(pszText);
}
set
{
NativeMethods.HDTEXTFILTER hdtextfilter = default(NativeMethods.HDTEXTFILTER);
hdtextfilter.pszText = value;
hdtextfilter.cchTextMax = value.Length + 1;
IntPtr intPtr = Marshal.AllocHGlobal(Marshal.SizeOf(hdtextfilter));
try
{
Marshal.StructureToPtr(hdtextfilter, intPtr, false);
InternalNativeMethods.HDITEM hditem = default(InternalNativeMethods.HDITEM);
hditem.mask = 256U;
hditem.type = 0U;
hditem.pvFilter = intPtr;
InternalUnsafeNativeMethods.SendMessage(this.owner.HeaderHandle, NativeMethods.HDM_SETITEM, (IntPtr)columnIndex, ref hditem);
}
finally
{
Marshal.FreeHGlobal(intPtr);
}
}
}
public static extern IntPtr SendMessage(HandleRef hWnd, int msg, IntPtr wParam, [In][Out] ref InternalNativeMethods.HDITEM lparam);
