WINFORM-SaveFileDialog 解析

 public TestOne()
        {
            InitializeComponent();
            SaveFileDialog();//调用打开SaveFileDialog 保存对话框
        }

        #region 保存对话框
        private void SaveFileDialog()
        {
            //string localFilePath, fileNameExt, newFileName, FilePath;
            System.IO.SaveFileDialog saveFileDialog1 = new System.IO.SaveFileDialog();

            //设置文件类型
            saveFileDialog1.Filter = " txt files(*.txt)|*.txt|All files(*.*)|*.*";

            //设置默认文件类型显示顺序
            saveFileDialog1.FilterIndex = 2;

            //保存对话框是否记忆上次打开的目录
            saveFileDialog1.RestoreDirectory = true;

            //点了保存按钮进入
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                //获得文件路径
                //localFilePath = saveFileDialog1.FileName.ToString();

                //获取文件名，不带路径
                //fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);

                //获取文件路径，不带文件名
                //FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf("\\"));

                //给文件名前加上时间
                //newFileName = DateTime.Now.ToString("yyyyMMdd") + fileNameExt;

                //在文件名里加字符
                //saveFileDialog1.FileName.Insert(1,"dameng");
                System.IO.FileStream fs = (System.IO.FileStream)saveFileDialog1.OpenFile();//输出文件

                                      //fs输出带文字或图片的文件，就看需求了
            }
        }

        #endregion