文件读写操作
//先判断是否存在文件
string path = "d:\\localName.txt";
FileStream fs = new FileStream(path,FileMode.OpenOrCreate); //没有的话则创建,有则打开
StreamReader sread = new StreamReader(fs);
string input = sread.ReadLine();
if (input != null)
{
txtname.Text = input;
lbtishi.Visible = false;
}
sread.Close();
fs.Close();
private void txtname_Leave(object sender, EventArgs e)
{
string path = "d:\\localName.txt";
//创建一个文件流
FileStream fss = new FileStream(path,FileMode.Open); //存在文件则对文件进行修改
if (txtname.Text == null || txtname.Text == "")
{
MessageBox.Show("请您输入用户名!");
}
else
{
//创建写入器
StreamWriter sw = new StreamWriter(fss);
sw.WriteLine(txtname.Text);
sw.Close();
fss.Close();
lbtishi.Visible = false;
}
}