統一編號驗證程式

/// 


/// 檢查統一編號是否正確

/// 回傳值：0:正確 1:字串長度不符 2:輸入的字串不能轉成數字 3:驗證錯誤

/// 

/// "BusiNo">要檢查的統一編號號碼

public int CheckBusiNo(string BusiNo)

{

   int vResult = 0, vStrLength = 0, vTempNum = 0, vTotalNum = 0;

   int[] vBaseNum = new int[8] { 1, 2, 1, 2, 1, 2, 4, 1 };

   vStrLength = BusiNo.Length;

   if (vStrLength != 8)

   {

       vResult = 1; //輸入的字串長度不是8碼

   }

   else

   {

       if (CheckIsNumber(BusiNo))

       {

           for (int i = 0; i < 8; i++)

           {

                vTempNum = Convert.ToInt32(BusiNo.Substring(i, 1)) * vBaseNum[i];

               vTotalNum += ((vTempNum / 10) + (vTempNum % 10));

           }

           if (vTotalNum % 10 == 0 || (vTotalNum % 10 == 9 && Convert.ToInt32(BusiNo.Substring(6, 1)) == 7))

           {

               vResult = 0;

           }

           else

           {

                vResult = 3;

           }

       }

       else

       {

           vResult = 2; //統一編號必須是全數字，不可以有文字

       }

   }

   return vResult;

} //End CheckBusiNo