asp. Net read TXT file

One . read

string txt = System.IO.File.ReadAllText("*** Absolute path ***/onNumber.txt");

Two . Write

System.IO.File.WriteAllText("*** Absolute path ***/onNumber.txt", (Convert.ToInt32(txt) + 1) + "");
// Here is simply converting the data to numeric type and then adding 1, The front is the absolute path to read the content , Next is the data to be written 

3、 ... and . follow-up

To create files manually , Or you can make a judgment , When the file does not exist , Create the file