c 学生管理系统11(13)

}

File.Delete(@".\学生管理系统文件.txt");

string temp = "";

for (int i = 0; i < lines.Length; i++)

{

string str = lines[i];

arr = str.Split('\t');

if (i == n)

{

for (int j = 0; j < 11; j++)

{

if (j == m)

{

arr[j] = xg;//修改

}

temp += arr[j] + "\t";

}

lines[i] = temp;

}

lines[i] += "\r\n";//换行

}

string stre = "";

for (int i = 0; i < lines.Length; i++)

{

stre += lines[i];

}

File.WriteAllText(@".\学生管理系统文件.txt", stre, Encoding.Default);

}

}

}