Microsoft.Win32.OpenFileDialog ofd = new Microsoft.Win32.OpenFileDialog(); ofd.DefaultExt = ".xml"; ofd.Filter = "xml file|*.xml"; if (ofd.ShowDialog() == true) { //此处做你想做的事 ...=ofd.FileName; 

} 

System.Windows.Forms.OpenFileDialog openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); openFileDialog1.InitialDirectory = "c:\\"; openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"; openFileDialog1.FilterIndex = 2; openFileDialog1.RestoreDirectory = true; if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) { //此处做你想做的事 ...=openFileDialog1.FileName; 

}类似的有文件夹浏览对话框:

System.Windows.Forms.FolderBrowserDialog folderBrowserDialog = new System.Windows.Forms.FolderBrowserDialog(); System.Windows.Forms.DialogResult result = folderBrowserDialog.ShowDialog(); if (result == System.Windows.Forms.DialogResult.OK) { tb_FolderPath.Text = folderBrowserDialog.SelectedPath; } 

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class OpenFileName { public int structSize = 0; public IntPtr hwnd = IntPtr.Zero; public IntPtr hinst = IntPtr.Zero; public string filter = null; public string custFilter = null; public int custFilterMax = 0; public int filterIndex = 0; public string file = null; public int maxFile = 0; public string fileTitle = null; public int maxFileTitle = 0; public string initialDir = null; public string title = null; public int flags = 0; public short fileOffset = 0; public short fileExtMax = 0; public string defExt = null; public int custData = 0; public IntPtr pHook = IntPtr.Zero; public string template = null; } public class LibWrap { // Declare a managed prototype for the unmanaged function.
[DllImport("Comdlg32.dll",SetLastError=true,ThrowOnUnmappableChar=true, CharSet = CharSet.Auto)] public static extern bool GetOpenFileName([In, Out] OpenFileName ofn); }之后的工作就是实例化、初始化和方法调用了:123456789101112131415OpenFileName ofn = new OpenFileName(); ofn.structSize = Marshal.SizeOf(ofn); ofn.filter = "Project files\0*.xml"; ofn.file = new string(new char[256]); ofn.maxFile = ofn.file.Length; ofn.fileTitle = new string(new char[64]); ofn.maxFileTitle = ofn.fileTitle.Length; ofn.initialDir = "C:\\"; ofn.title = "Open Project"; ofn.defExt = "xml"; ofn.structSize = Marshal.SizeOf(ofn); if (LibWrap.GetOpenFileName(ofn)) { //此处做你想做的事 ...=ofn.file; 

}