如何从Asp.Net/C# Codebehind中的单个SQL Select语句返回多个字符串变量？

Question

For example, using following code.

SELECT COUNT(1) as 'ClientActive', 

(SELECT COUNT(1) FROM t1 AS t2 WHERE t2.fieldname = 'A') AS TotalA,

(SELECT COUNT(1) FROM t1 AS t2 WHERE t2.fieldname = 'B') AS TotalB,
(SELECT COUNT(1) FROM t1 AS t2 WHERE t2.fieldname = 'C') AS TotalC,
(SELECT COUNT(1) FROM t1 AS t2 WHERE t2.fieldname = 'D') AS TotalD
 FROM t1 WHERE clientstatus='active'

I want something return like this:

    lblString1.Text = TotalA;
    lblString2.Text = TotalB;
    etc..

Can someone produce a C# code to do this? Thank you.

Answer 1

使用DataSet然后遍历它，或者仅获取第一行并将每行值分配给标签（假设您知道如何填充数据集）：

lblString1.Text = row["ClientActive"].toString(); lblString2.Text = row["TotalB"].toString(); etc.