Question

我有一個SQL數據庫表，我從中查詢我的c＃項目。該表包含一個列，它將int作爲數據類型（僱主年齡）。我正在查詢這一列，並希望將從該列查詢的每條記錄加起來並顯示記錄的總數;

代碼：

int AddAge; 
string getAge; 

    Query = "SELECT * FROM TblEmp WHERE Id = '" + id + "' AND Position = '"+Manager+"'"; 
         theReader = conn.ExecuteStatement(Query); 
         while(theReader.Read()) 
         getAge = theReader["Age"].ToString(); 
         AddAge = int.Parse(getAge); 


        AddAge + getAge; // this is where i am stuck, How can I add up the ages and display the the total? 

Answer 1

我想你只需要添加括號內

while(theReader.Read()) 
{ 
         getAge = theReader["Age"].ToString(); 
         AddAge = int.Parse(getAge); 


        AddAge + getAge; 
} 

如果你只需要時代的總和，你可以改變你的SQL語句代碼

Query = "SELECT SUM(Age) FROM TblEmp WHERE Id = '" + id + "' AND Position = '"+Manager+"'"; 

then execute reader.executescalar