Winform控件SaveFileDialog用于保存文件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace SaveFileDialogDemo
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }

    /// <summary>
    /// 保存文件按钮
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btn_SaveFile_Click(object sender, EventArgs e)
    {
      //
      SaveFileDialog sfd = new SaveFileDialog();
      //设置保存文件对话框的标题
      sfd.Title = "请选择要保存的文件路径";
      //初始化保存目录，默认exe文件目录
      sfd.InitialDirectory = Application.StartupPath;
      //设置保存文件的类型
      sfd.Filter = "文本文件|*.txt|音频文件|*.wav|图片文件|*.jpg|所有文件|*.*";
      if (sfd.ShowDialog() == DialogResult.OK)
      { 
        //获得保存文件的路径
        string filePath = sfd.FileName;
        //保存
        using (FileStream fsWrite = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write))
        {
          byte[] buffer = Encoding.Default.GetBytes(txt_FileInfo.Text.ToString().Trim());
          fsWrite.Write(buffer, 0, buffer.Length);
        }
      }
    }
  }
}