using System.IO;

            string file = @"C:\Documents and Settings\桌面\123.html";

            if (File.Exists(file))
            {
                FileStream fs = File.OpenRead(file);
                StreamReader sr = new StreamReader(fs, System.Text.Encoding.GetEncoding("gb2312"));
                strS = sr.ReadToEnd();
                sr.Close();
                fs.Close();

            }