一个文件流操作简单的demo
这里写图片描述 //写入文件
private void button1_Click(object sender, EventArgs e)
{
//(创建文件)创建文件流
FileStream fs = new FileStream("F:\myfile\myfile.txt", FileMode.Create);
//创建写入流
StreamWriter sw = new StreamWriter(fs);
//以流的方式写入数据
sw.Write(this.textBox1.Text.Trim());
//关闭写入流
sw.Close();
//关闭文件流
fs.Close();
}
//读取文件
private void button2_Click(object sender, EventArgs e)
{
//(读取文件)创建文件流
FileStream fs = new FileStream("F:\myfile\myfile.txt",FileMode.Open);
//创建读取流
StreamReader sr = new StreamReader(fs);
//以流的方式读取数据
this.textBox1.Text = sr.ReadToEnd();
//关闭读取器
sr.Close();
//关闭文件流
fs.Close();
}
//追加文件内容
private void button3_Click(object sender, EventArgs e)
{
FileStream fs = new FileStream("F:\myfile\myfile.txt", FileMode.Append);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine(DateTime.Now.ToString() "[文件操作正常！]");
sw.Close();
fs.Close();
}
//删除文件
private void button4_Click(object sender, EventArgs e)
{
File.Delete("F:\myfile\myfile.txt");
}
//复制文件
private void button5_Click(object sender, EventArgs e)
{
if (File.Exists(this.textBox3.Text.Trim()))
{
File.Delete(this.textBox3.Text.Trim());
}
File.Copy(this.textBox2.Text.Trim(), this.textBox3.Text.Trim());
}
//移动文件
private void button6_Click(object sender, EventArgs e)
{
if (File.Exists(this.textBox3.Text.Trim()))
{
File.Delete(this.textBox3.Text.Trim());
}
if (File.Exists(this.textBox2.Text.Trim()))
{
File.Move(this.textBox2.Text.Trim(), this.textBox3.Text.Trim());
}
else
{
MessageBox.Show("文件不存在！");
}
}
