我們怎樣才能從數組文本篩選

Question

我有大小像3,6,9,12,15-返回數據的數組。（3乘法）

DataTable dt = new DataTable(); 
string GridData = ViewState["ShowItem"].ToString(); 
string[] FilterData = GridData.Split('^'); 

以上陣列返回的數據像..

FilterData [0] = "Pizza";  (Item) 
FilterData [1] = "2$";  (Price) 
FilterData [2] = "2";   (Quantity) 
FilterData [3] = "Burger"; 
FilterData [4] = "5$"; 
FilterData [5] = "1"; 
FilterData [6] = "Cesa"; 
FilterData [7] = "7$"; 
FilterData [8] = "3"; 

now I want to enter above data as column wise in database like: 
Item  Price Quantity Total(Price*Quantity) 

現在我想運行一個循環，增加特定領域的數據，如：

for (int nIndex = 0; nIndex < FilterData.Length; nIndex++) 
{ 
DataRow drow = dt.NewRow(); 
drow["ProductItem"] = FilterData[nIndex].ToString(); (Add all Item) 
drow["Cost"] = FilterData[nIndex].ToString();   (Add all Cost) 
drow["Quantity"] = FilterData[nIndex].ToString();  (Add all Quantity) 
double Total= Convert.ToDouble(FilterData[nIndex].ToString()) * Convert.ToInt32(FilterData[nIndex].ToString());  (Add all cost*Quantity) 
       drow["Total"] = Total; 
dt.Rows.Add(drow); 

}

所以任何人可以幫助我，我怎麼能運行循環，因此數據添加到特定的列，如： 項目價格數量合計（價格*數量）

Pizza 2  2    4 
Burger 5  1    5 
Cesa  7  3    21 

Answer 1

您需要增加nIndex 3每次通過它從nIndex偏移訪問的每個成員：

for (int nIndex = 0; nIndex < FilterData.Length; nIndex += 3) 
{ 
    DataRow drow = dt.NewRow(); 
    drow["ProductItem"] = FilterData[nIndex];    // Item 
    var cost = FilterData[nIndex + 1];      // Cost 
    var qty = FilterData[nIndex + 2];      // Quantity 
    drow["Cost"] = cost; 
    drow["Quantity"] = qty; 
    double Total = 
     Convert.ToDouble(cost.Remove(cost.Length - 1)) * // remove $ 
     Convert.ToInt32(qty);        // Total 
    drow["Total"] = Total; 
    dt.Rows.Add(drow); 
}