public bool?ShowDialog(Window owner)
{
NativeMethods.OpenFileName ofn = ToOfn(owner);
if (NativeMethods.GetOpenFileName(ofn))
{
FromOfn(ofn);
return(true);
}
else
{
FreeOfn(ofn);
return(false);
}
}
protected void FromOfn(NativeMethods.OpenFileName ofn)
{
ReadOnlyChecked = (ofn.flags & (int)NativeMethods.OpenFileFlags.OFN_READONLY) != 0;
FilterIndex = ofn.filterIndex;
if (ofn.fileOffset > 0 && bufferMem[ofn.fileOffset - 1] == '\0')
{
List <string> result = new List <string>();
int l = 0;
for (; l < bufferMem.Length && bufferMem[l] != '\0'; ++l)
{
}
string path = new string(bufferMem, 0, l);
while (true)
{
++l;
int s = l;
for (; l < bufferMem.Length && bufferMem[l] != '\0'; ++l)
{
}
if (l < s + 2)
{
break;
}
string name = new string(bufferMem, s, l - s);
result.Add(System.IO.Path.Combine(path, name));
}
FileNames = result.ToArray();
FileName = FileNames[0];
}
else
{
int l = 0;
for (; l < bufferMem.Length && bufferMem[l] != '\0'; ++l)
{
}
FileName = new string(bufferMem, 0, l);
FileNames = new string[] { FileName };
}
FreeOfn(ofn);
}
protected NativeMethods.OpenFileName ToOfn(Window owner)
{
NativeMethods.OpenFileName ofn = new NativeMethods.OpenFileName();
ofn.structSize = Marshal.SizeOf(ofn);
ofn.dlgOwner = ((HwndSource)HwndSource.FromVisual(owner)).Handle;
if (!string.IsNullOrEmpty(Filter))
{
StringBuilder sb = new StringBuilder();
string[] parts = Filter.Split('|');
for (int i = 1; i < parts.Length; i += 2)
{
sb.Append(parts[i - 1]);
sb.Append('\0');
sb.Append(parts[i]);
sb.Append('\0');
}
sb.Append('\0');
sb.Append('\0');
ofn.filter = sb.ToString();
}
ofn.filterIndex = FilterIndex;
bufferMem = new char[64001];
memHandle = GCHandle.Alloc(bufferMem, GCHandleType.Pinned);
ofn.file = memHandle.AddrOfPinnedObject();
ofn.maxFile = 64000;
ofn.title = Title;
ofn.flags =
(int)NativeMethods.OpenFileFlags.OFN_EXPLORER |
(CheckFileExists ? (int)NativeMethods.OpenFileFlags.OFN_FILEMUSTEXIST : 0) |
(CheckPathExists ? (int)NativeMethods.OpenFileFlags.OFN_PATHMUSTEXIST : 0) |
(DereferenceLinks ? 0 : (int)NativeMethods.OpenFileFlags.OFN_NODEREFERENCELINKS) |
(MultiSelect ? (int)NativeMethods.OpenFileFlags.OFN_ALLOWMULTISELECT : 0) |
(ReadOnlyChecked ? (int)NativeMethods.OpenFileFlags.OFN_READONLY : 0) |
(RestoreDirectory ? (int)NativeMethods.OpenFileFlags.OFN_NOCHANGEDIR : 0) |
(ShowReadOnly ? 0 : (int)NativeMethods.OpenFileFlags.OFN_HIDEREADONLY) |
(ValidateNames ? 0 : (int)NativeMethods.OpenFileFlags.OFN_NOVALIDATE);
ofn.defExt = DefaultExt;
return(ofn);
}
protected void FreeOfn(NativeMethods.OpenFileName ofn)
{
memHandle.Free();
bufferMem = null;
}
