我需要许多（16）个不同的查询来同时获取行数。我正在运行16个不同的连接，但我认为我可以合并到只有1个存储过程。
我遇到了麻烦，因为它为此行的datareader（系统超出范围检测）提供了错误：
Count2 = Convert.ToInt32(objDRL("Row_Count2").ToString).
这是我的代码：
Dim strConn As String = "Data Source=myDataSource"
Dim Conn As New SqlConnection(strConn)
Dim Cmd As New SqlCommand("adminStats", Conn)
Cmd.CommandType = CommandType.StoredProcedure
Dim objDRL As SqlDataReader
Cmd.Parameters.Add(New SqlParameter("@campDate", "June 2014"))
Conn.Open()
objDRL = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection)
If objDRL.HasRows Then
While objDRL.Read()
Count1 = Convert.ToInt32(objDRL("Row_Count1"))
Count2 = Convert.ToInt32(objDRL("Row_Count2"))
Count3 = Convert.ToInt32(objDRL("Row_Count3"))
Count4 = Convert.ToInt32(objDRL("Row_Count4"))
Count5 = Convert.ToInt32(objDRL("Row_Count5"))
Count6 = Convert.ToInt32(objDRL("Row_Count6"))
Count7 = Convert.ToInt32(objDRL("Row_Count7"))
Count8 = Convert.ToInt32(objDRL("Row_Count8"))
Count9 = Convert.ToInt32(objDRL("Row_Count9"))
Count10 = Convert.ToInt32(objDRL("Row_Count10"))
Count11 = Convert.ToInt32(objDRL("Row_Count11"))
Count12 = Convert.ToInt32(objDRL("Row_Count12"))
Count13 = Convert.ToInt32(objDRL("Row_Count13"))
Count14 = Convert.ToInt32(objDRL("Row_Count14"))
Count15 = Convert.ToInt32(objDRL("Row_Count15"))
End While
Else
End If
link1.Text = Count1.ToString
link2.Text = Count2.ToString
link3.Text = Count3.ToString
link4.Text = Count4.ToString
Link5.Text = Count5.ToString
Link6.Text = Count6.ToString
Link7.Text = Count7.ToString
Link8.Text = Count8.ToString
Link9.Text = Count9.ToString
Link10.Text = Count10.ToString
Link11.Text = Count11.ToString
Link12.Text = Count12.ToString
Link13.Text = Count13.ToString
Link14.Text = Count14.ToString
Link15.Text = Count15.ToString
Conn.Close()
存储过程：
CREATE PROCEDURE adminStats
@campDate VARCHAR(20)
AS
BEGIN
SELECT COUNT(*) AS Row_Count1 FROM Customer
SELECT COUNT(*) AS Row_Count2 FROM campRegistration WHERE campDate = @campDate
SELECT COUNT(*) AS Row_Count3 FROM campRegistration WHERE paidFull = 'True'
SELECT COUNT(*) AS Row_Count4 FROM campRegistration WHERE shirtSize = 'S'
SELECT COUNT(*) AS Row_Count5 FROM campRegistration WHERE shirtSize = 'M'
SELECT COUNT(*) AS Row_Count6 FROM campRegistration WHERE shirtSize = 'L'
SELECT COUNT(*) AS Row_Count7 FROM campRegistration WHERE shirtSize = 'XL'
SELECT COUNT(*) AS Row_Count8 FROM campRegistration WHERE shirtSize = 'XXL'
SELECT COUNT(*) AS Row_Count9 FROM campRegistration WHERE Staff = 'True'
SELECT COUNT(*) AS Row_Count10 FROM campRegistration WHERE days = '1'
SELECT COUNT(*) AS Row_Count11 FROM campRegistration WHERE days = '2'
SELECT COUNT(*) AS Row_Count12 FROM campRegistration WHERE days = '3'
SELECT COUNT(*) AS Row_Count13 FROM campRegistration WHERE days = '12'
SELECT COUNT(*) AS Row_Count14 FROM campRegistration WHERE days = '23'
SELECT COUNT(*) AS Row_Count15 FROM campRegistration WHERE days = '123'
END
GO
答案 0 :(得分：9)
尝试更改您的查询 -
CREATE PROCEDURE adminStats
@campDate varChar(20)
AS
BEGIN
SELECT
(SELECT COUNT(1) FROM dbo.Customer) AS Row_Count1
, COUNT(CASE WHEN campDate = @campDate THEN 1 END) AS Row_Count2
, COUNT(CASE WHEN paidFull = 'True' THEN 1 END) AS Row_Count3
, COUNT(CASE WHEN shirtSize = 'S' THEN 1 END) AS Row_Count4
, COUNT(CASE WHEN shirtSize = 'M' THEN 1 END) AS Row_Count5
, COUNT(CASE WHEN shirtSize = 'L' THEN 1 END) AS Row_Count6
, COUNT(CASE WHEN shirtSize = 'XL' THEN 1 END) AS Row_Count7
, COUNT(CASE WHEN shirtSize = 'XXL' THEN 1 END) AS Row_Count8
, COUNT(CASE WHEN Staff = 'True' THEN 1 END) AS Row_Count9
, COUNT(CASE WHEN [days] = '1' THEN 1 END) AS Row_Count10
, COUNT(CASE WHEN [days] = '2' THEN 1 END) AS Row_Count11
, COUNT(CASE WHEN [days] = '3' THEN 1 END) AS Row_Count12
, COUNT(CASE WHEN [days] = '12' THEN 1 END) AS Row_Count13
, COUNT(CASE WHEN [days] = '23' THEN 1 END) AS Row_Count14
, COUNT(CASE WHEN [days] = '123' THEN 1 END) AS Row_Count15
FROM dbo.campRegistration
WHERE [days] IN ('1', '2', '3', '12', '23', '123')
OR shirtSize IN ('S', 'M', 'L', 'XL', 'XXL')
OR Staff = 'True'
OR paidFull = 'True'
OR campDate = @campDate
END
有关重复扫描的其他信息，请阅读此topic。
答案 1 :(得分：1)
---------------------------------- C＃Code ----------- ---------------------------------
FOR INSERT
cmd = new SqlCommand("sp_UserLogin", con);
cmd.CommandType = CommandType.StoredProcedure;
try
{
cmd.Parameters.AddWithValue("@op", "Insert");
cmd.Parameters.AddWithValue("@UserName", userdetail.UserName);
cmd.Parameters.AddWithValue("@Password", userdetail.Password);
cmd.Parameters.AddWithValue("@ConfirPassword", userdetail.ConfirmPassword);
cmd.ExecuteNonQuery();
}
FOR SELECT
cmd = new SqlCommand("sp_UserLogin", con);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataReader dr;
try
{
cmd.Parameters.AddWithValue("@op", "Select");
dr = cmd.ExecuteReader();
}
--------------------------------商店程序------------- ----------------------
Create PROCEDURE [dbo].[sp_UserLogin]
-- Add the parameters for the stored procedure here
@op varchar(50)='g',
@UserName varchar(50)=null,
@Password varchar(100)=null,
@ConfirPassword varchar(100)=null
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
if @op='Insert'
BEGIN
-- Insert statements for procedure here
insert into UserLogin values (@UserName,@Password,@ConfirPassword)
End
if @op='Update'
BEGIN
-- Insert statements for procedure here
Select * from UserLogin
End
END