using System.IO;StreamWriter myTxtWriter=new StreamWriter(
DateTime.Now.Date.ToString()+".txt",false);
myTxtWriter.Write(textBox1.Text);
myTxtWriter.Flush();
myTxtWriter.Close();
DateTime.Now.Date.ToString()+".txt",false);
myTxtWriter.Write(textBox1.Text);
myTxtWriter.Flush();
myTxtWriter.Close();
DateTime.Now.Date.ToString("yyyyMMdd")+".txt",false);
帮你顶一个!
写得很乱但能用: private void button1_Click(object sender, System.EventArgs e)
{ string st1=""; DateTime dt=DateTime.Now;
string st=dt.Date.ToShortDateString();
string path="c:\\"+st+".txt"; if(File.Exists(path))
{
FileStream fs=File.Open(path,FileMode.Open); StreamReader sr=new StreamReader(fs);
st1=sr.ReadToEnd();
fs.Close();
sr.Close();
File.Delete(path);
} FileStream fs1=File.Open(path,FileMode.Create); StreamWriter sw = new StreamWriter(fs1);
sw.WriteLine (textBox1.Text);
sw.WriteLine ("-----------------------------------");
sw.WriteLine(st1);
sw.Close();
} :)