dividing the string into sub strings

Question

HI all Here i am retrieving mobile numbers from database like 919849098490(means 12 digit).And i am getting hundreds of numbers to a variable. so i need to divide those numbers into 100 numbers into a string with commas. means if i have 245 mobile numbers then i need to divide those numbers to three strings like first 100 numbers to str1next hundred numbers to str2 and remaining 45 numbers to str3. above situation is an example. if i have mobile numbers like 850 then i have 9 string variables. I want in a line(12 digit numbers string) also appended a comma for every 12 digit number except before first number and after last number. Means 919849098490919849098490919849098490 here three 12 digit numbers are there and separated with two commas only. i want like str1 =919849098490919849098490919849098490 thank you.

James Tomar · Answer

hope this should help.. //labelInput has the mobile number string labelLength.Text = labelInput.Text.Length.ToString(); //suppose length of the required string is 120 instead of 100 characters int dividers=labelInput.Text.Length/120; //if the end of string is less than 120 characters if (labelInput.Text.Length % 120 > 0) dividers += 1; //create an array to split and hold the actual string string [] str= new string [dividers]; for ( int i = 0; i { //if last array element has less than 120 characters if ((i==(dividers-1)) && (labelInput.Text.Length % 120 > 0)) str[i] = labelInput.Text.Substring(i * 120 labelInput.Text.Length % 120); else str[i] = labelInput.Text.Substring(i * 120 120); //insert  for ( int j = 1; j str[i] = str[i].Insert(j*12+j-1  ); richTextBox1.Text += str[i] + 
 ; }