3月19日 流

it2022-05-05  124

1、写入流

              string filename = saveFileDialog1.FileName;                     //写入流,可以在硬盘上创建文件,并为文件写入信息                     StreamWriter sw = new StreamWriter(filename);                     sw.Write(this.textBox1.Text);                      //this:代表的它所在的那个类当前对象                     sw.Close();  (1)、点击写入                                          (2)、找到文件,打开

                

 

2、读入流:

     openFileDialog1.Filter="文本文档|*.txt|所有文件|*.*";             //设置读取格式             openFileDialog1.ShowDialog();                  //打开对话框

        string filename = openFileDialog1.FileName;                //通过读入流进行文件读取                StreamReader sr = new StreamReader(filename);                textBox1.Text = sr.ReadToEnd();    //ReadToEnd从头读到尾                           sr.Close();               //关闭流

(1).点击打开                                                   (2)、选中显示

                

3、FileStream:(用控件pictureBox)

专门用于程序与硬盘之间文件读写的操作,

              //文件流                 FileStream fs = new FileStream(openFileDialog1.FileName,FileMode.Open,FileAccess.Read);                 Image img = System.Drawing.Bitmap.FromStream(fs);                 pictureBox1.Image = img;

4、图片类:

二进制数据的话:bianaryReader

FileStream fs = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);                BinaryReader br = new BinaryReader(fs);                byte[] buffer = br.ReadBytes(int.Parse(fs.Length.ToString())); 5、MemoryStream:用于程序和内存之间进行操作数据,一般用于程序和数据库中间的中转

转载于:https://www.cnblogs.com/tzq9308/p/4350694.html


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