C#打开指定路径文件对话框

1. private string OpenFileDlog(string DeafultDir)
2. {
3. OpenFileDialog Ofd = new OpenFileDialog();
4. Ofd.AddExtension = true;
5. Ofd.Filter = "文本文档(*.txt)|*.txt|所有文件(*.*)|*.*";
6. Ofd.InitialDirectory = DeafultDir.Trim() == "" ? Environment.GetFolderPath(Environment.SpecialFolder.Desktop) : DeafultDir;
7. try
8. {
9. Ofd.ShowDialog();
10. }
11. catch { }
12. if (Ofd.FileName == null || Ofd.FileName.Trim() == "")
13. return DeafultDir;
14. else
15. return Ofd.FileName;
16. }