C#使用OpenFileDialog获取文件路径

public void ButtonOpen_Click(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();

            fileDialog.InitialDirectory="C:\\";    //打开对话框后的初始目录
            fileDialog.Filter = "文本文件|*.txt|所有文件|*.*";
            fileDialog.RestoreDirectory = false;    //若为false，则打开对话框后为上次的目录。若为true，则为初始目录
            if (fileDialog.ShowDialog() == DialogResult.OK)
                FilePath.Text = System.IO.Path.GetFullPath(fileDialog.FileName);//将选中的文件的路径传递给TextBox “FilePath”
        }