amount calculation

some error accured...Reason worng way of input getting drop downlist please help me guys..... using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void ddcroes_SelectedIndexChanged(object sender, EventArgs e) { int inpno = Convert.ToInt32(ddcroes.SelectedIndex); int n = inpno * 10000000; int no=Total(n); } protected void ddlaks_SelectedIndexChanged(object sender, EventArgs e) { int inpno = Convert.ToInt32(ddcroes.SelectedIndex); int n1 = inpno * 100000; int no1=Total(n1); } protected void ddths_SelectedIndexChanged(object sender, EventArgs e) { int inpno = Convert.ToInt32(ddcroes.SelectedIndex); int n2 = inpno * 1000; int no2=Total(n2); } public static int Total(int no,int no1, int no2) { int inputNumber=no+no1+no2; string outwords = NumbersToWords(inputNumber); //lblWords.Text = outwords; } public static string NumbersToWords(int inputNumber) { int inputNo = inputNumber; if (inputNo == 0) return "Zero"; int[] numbers = new int[4]; int first = 0; int u, h, t; System.Text.StringBuilder sb = new System.Text.StringBuilder(); if (inputNo < 0) { sb.Append("Minus "); inputNo = -inputNo; } string[] words0 = {"" ,"One ", "Two ", "Three ", "Four ", "Five " ,"Six ", "Seven ", "Eight ", "Nine "}; string[] words1 = {"Ten ", "Eleven ", "Twelve ", "Thirteen ", "Fourteen ", "Fifteen ","Sixteen ","Seventeen ","Eighteen ", "Nineteen "}; string[] words2 = {"Twenty ", "Thirty ", "Forty ", "Fifty ", "Sixty ", "Seventy ","Eighty ", "Ninety "}; string[] words3 = { "Thousand ", "Lakh ", "Crore " }; numbers[0] = inputNo % 1000; // units numbers[1] = inputNo / 1000; numbers[2] = inputNo / 100000; numbers[1] = numbers[1] - 100 * numbers[2]; // thousands numbers[3] = inputNo / 10000000; // crores numbers[2] = numbers[2] - 100 * numbers[3]; // lakhs for (int i = 3; i > 0; i--) { if (numbers[i] != 0) { first = i; break; } } for (int i = first; i >= 0; i--) { if (numbers[i] == 0) continue; u = numbers[i] % 10; // ones t = numbers[i] / 10; h = numbers[i] / 100; // hundreds t = t - 10 * h; // tens if (h > 0) sb.Append(words0[h] + "Hundred "); if (u > 0 || t > 0) { if (h > 0 || i == 0) sb.Append("and "); if (t == 0) sb.Append(words0[u]); else if (t == 1) sb.Append(words1[u]); else sb.Append(words2[t - 2] + words0[u]); } if (i != 0) sb.Append(words3[i - 1]); } return sb.ToString().TrimEnd(); } private int Total(int n) { throw new NotImplementedException(); } }