How ASP.net (C #) reads the data from the. txt file in the upload process and writes it to the database

private void ReadFile (string path)
{
if (System.IO.File.Exists (path))//Determine if the file exists for the specified path
{
StreamReader reader=new StreamReader (path,system.text.encoding.getencoding ("GB2312"));
Instantiate a StreamReader, and specify the encoding method, otherwise read Chinese will appear garbled
Reader. ReadLine ()//read one line first (if there is no title or something above the file, do not have this line of code)
String oneline;
while (Oneline =reader. ReadLine ())!= null)
{
Oneline=oneline. Trim ();
if (oneline!= "")
{
string [] ss=oneline. Split (",". ToCharArray ());//The data in each row is separated and stored in an array.
if (!existedname (ss[0). ToString ())) Ss[0] is the first element of the array to determine whether the data in the database exists
{
StringBuilder sb=new StringBuilder (); instantiation StringBuilder
Sb. Append ("INSERT into tab_adminuser values (");
for (int i=0;i<ss. length;i++)
{
Sb. Append ("'" "+ss[i]+" "" + ",");

}
Sb. Append ("' 3, '"); the above sentence is the INSERT statement that constructs SQL
Sb. Remove (sb.) ToString (). LastIndexOf (","), 1);

Sb. Append (")");
Response.Write (sb.) ToString ());
Response.End ();
Dc.exesql (sb.) ToString ());//Execution SQL,DC is one of my classes, the function is to complete the database insert
}


}
}
Reader. Close ()//Remember to turn off the input output stream

}
Else
{
Response.Write (' <script language= ' JavaScript ' >alert (' The specified file does not exist. '); History.go ( -1);</script> ");
Response.End ();
}
}