SHMultiFileProperties的第一个参数是一个自定义的IDataObject。我个人不是很懂怎么去构造这个IDataObject,虽然参数说明里的那些数据我都有,但就是不知道怎么用。求一个SHMultiFileProperties的调用例子,特别是有IDataObject的使用。
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[DllImport("shell32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr SHMultiFileProperties(IDataObject pdtobj, int dwFlags);
[DllImport("shell32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr ILCreateFromPath(string path);
[DllImport("shell32.dll", CharSet = CharSet.None)]
public static extern void ILFree(IntPtr pidl);
[DllImport("shell32.dll", CharSet = CharSet.None)]
public static extern int ILGetSize(IntPtr pidl); private void button2_Click(object sender, EventArgs e)
{ var data = new DataObject();
var files = new StringCollection() { @"c:\temp\2010_12_21 9_11_21.jpg", @"c:\temp\2010_12_21 9_09_31.jpg" };
data.SetFileDropList(files);
data.SetData("Preferred DropEffect", true, new MemoryStream(new byte[] { 5, 0, 0, 0 }));
data.SetData("Shell IDList Array", true, CreateShellIDList(files));
Clipboard.SetDataObject(data, true); SHMultiFileProperties(data, 0);
} private static MemoryStream CreateShellIDList(StringCollection filenames)
{
// first convert all files into pidls list
int pos = 0;
byte[][] pidls = new byte[filenames.Count][];
foreach (var filename in filenames)
{
// Get pidl based on name
IntPtr pidl = ILCreateFromPath(filename);
int pidlSize = ILGetSize(pidl);
// Copy over to our managed array
pidls[pos] = new byte[pidlSize];
Marshal.Copy(pidl, pidls[pos++], 0, pidlSize);
ILFree(pidl);
} // Determine where in CIDL we will start pumping PIDLs
int pidlOffset = 4 * (filenames.Count + 2);
// Start the CIDL stream
var memStream = new MemoryStream();
var sw = new BinaryWriter(memStream);
// Initialize CIDL witha count of files
sw.Write(filenames.Count);
// Calcualte and write relative offsets of every pidl starting with root
sw.Write(pidlOffset);
pidlOffset += 4; // root is 4 bytes
foreach (var pidl in pidls)
{
sw.Write(pidlOffset);
pidlOffset += pidl.Length;
} // Write the root pidl (0) followed by all pidls
sw.Write(0);
foreach (var pidl in pidls) sw.Write(pidl);
// stream now contains the CIDL
return memStream;
}此代码在Win7下通过测试,但据原作者说在XP下无法正常工作,我没有环境没办法测试,这里有一篇文章可能会有帮助,楼主自己去发现吧。
http://www.zaoxue.com/article/tech-31614.htm