using System.Windows.Forms;

 OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Title = "选择文件";
            openFileDialog.Filter = "zip文件|*.zip|rar文件|*.rar|所有文件|*.*";
            openFileDialog.FileName = string.Empty;
            openFileDialog.FilterIndex = 1;
            openFileDialog.RestoreDirectory = true;
            openFileDialog.DefaultExt = "zip";
            DialogResult result = openFileDialog.ShowDialog();
            if (result == System.Windows.Forms.DialogResult.Cancel)
            {
                return;
            }
            string fileName = openFileDialog.FileName;
            this.textBox1.Text = fileName;

 FolderBrowserDialog m_Dialog = new FolderBrowserDialog();
            DialogResult result = m_Dialog.ShowDialog();

            if (result == System.Windows.Forms.DialogResult.Cancel)
            {
                return;
            }
            string m_Dir = m_Dialog.SelectedPath.Trim();
            this.textBox1.Text = m_Dir;