// 将文本写入文件
using (StreamWriter write = new StreamWriter(Request.PhysicalApplicationPath + "\\TestFile.txt"))
{
write.Write(TextBox1.Text);
}
// 将文件中的文本读出来
using (StreamReader sr = new StreamReader(Request.PhysicalApplicationPath + "TestFile.txt"))
{
string line;
StringBuilder str = new StringBuilder();