使用asp.net C＃计算总和并在标签中显示

Question

表名：样本

ID| Name  | Amount
--|-------|-----
1 | sam   |  12
----------|-----
2 | samp1 |  25

标记

 <asp:Label runat="server" ID="lblsupcount"></asp:Label>

如何在c＃中编写代码

Answer 1

SqlConnection conn=new SqlConnection("your DB connection string"); //connect to the database here
conn.Open();
SqlDataAdapter sda=new SqlDataAdapter("SELECT SUM(Amount) FROM sample",conn);
conn.Close();
DataTable dt= new DataTable();
sda.Fill(dt);
lblsupcount.Text=dt.Rows[0][0].toString();