C# 创建存储过程以将下拉列表的值与数据库中的值相乘

我有一个如下的存储过程：（有一个表，其中有一些列，包括

'Ta'

，

'Em'

，

'Ma'

，

'Sa'

，其中有几个不同的记录）

网页包括一些下拉列表，如下所示：

<form id="form1" runat="server">
        <asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" >
            <asp:ListItem Value="8">Emk</asp:ListItem>
            <asp:ListItem Value="8">Tar</asp:ListItem>
            <asp:ListItem Value="8">San</asp:ListItem>
            <asp:ListItem Value="8">Mas</asp:ListItem>
        </asp:DropDownList>
        <br />
        <asp:DropDownList ID="DropDownList2" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem Value="7">Emk</asp:ListItem>
            <asp:ListItem Value="7">Tar</asp:ListItem>
            <asp:ListItem Value="7">San</asp:ListItem>
            <asp:ListItem Value="7">Mas</asp:ListItem>
        </asp:DropDownList>
        <br />
        <asp:DropDownList ID="DropDownList3" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem Value="6">Emk</asp:ListItem>
            <asp:ListItem Value="6">Tar</asp:ListItem>
            <asp:ListItem Value="6">San</asp:ListItem>
            <asp:ListItem Value="6">Mas</asp:ListItem>
        </asp:DropDownList>
        <br />
        <asp:DropDownList ID="DropDownList4" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem Value="6">Emk</asp:ListItem>
            <asp:ListItem Value="6">Tar</asp:ListItem>
            <asp:ListItem Value="6">San</asp:ListItem>
            <asp:ListItem Value="6">Mas</asp:ListItem>
        </asp:DropDownList>
        <br />
        <br />
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
        <br />
        <br />
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
    </form>

这些代码是有效的，但总是有相同的结果，因为这一部分

添加（“@Tar”，SqlDbType.Int）.Value= DropDownList1.SelectedValue

例如，在DP1中有几个值为

8

的选项，如果用户在存储过程中选择任何值，它将与

'@Tar'

相乘，则其他DP的结果相同，因此即使选择不同，结果也始终相同，但是如果用户在

DP1

中选择

'Emk'

，则值8仅与存储过程中的

'@Emk'

相乘，如果在

dp2

中选择

'Mas'

，则与

'@Mas'

相乘。

---

但我不知道如何在代码中定义它，我们将非常感谢您的帮助

像这样更改存储过程

DECLARE @dp1 varchar (100)
DECLARE @dp2 varchar (100)
DECLARE @dp3 varchar (100)
DECLARE @dp4 varchar (100)

DECLARE @dpp1 int
DECLARE @dpp2 int
DECLARE @dpp3 int
DECLARE @dpp4 int


set @dp1 = 'Emk' >>as example
set @dp2 = 'Mas' >>as example 



if (@dp1= 'Emk')
Begin
set @dpp1= 8 
Select Emk*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'Tar')
Begin
set @dpp1= 8
Select Tar*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'San')
Begin
set @dpp1= 8 
Select San*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'Mas')
Begin
set @dpp1= 8
Select Mas*@dpp1 as val1 FROM Cdetail
End

if (@dp2= 'Emk')
Begin
set @dpp2= 7 
Select Emk*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'Tar')
Begin
set @dpp2= 7 
Select Tar*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'San')
Begin
set @dpp2= 7 
Select San*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'Mas')
Begin
set @dpp2= 7 
Select Mas*@dpp2 as val1 FROM Cdetail
End


SELECT 
Namecar,
(Mas*@dpp1)+(San*@dpp1)+(Tar*@dpp1)+(Emk*@dpp1)+(Mas*@dpp2)+(San*@dpp2)+(Tar*@dpp2)+(Emk*@dpp2)
 as finalresult
FROM Cdetail

---

请注意，这是一个示例，您需要对其进行改进

DECLARE @dp1 varchar (100)
DECLARE @dp2 varchar (100)
DECLARE @dp3 varchar (100)
DECLARE @dp4 varchar (100)

DECLARE @dpp1 int
DECLARE @dpp2 int
DECLARE @dpp3 int
DECLARE @dpp4 int


set @dp1 = 'Emk' >>as example
set @dp2 = 'Mas' >>as example 



if (@dp1= 'Emk')
Begin
set @dpp1= 8 
Select Emk*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'Tar')
Begin
set @dpp1= 8
Select Tar*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'San')
Begin
set @dpp1= 8 
Select San*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'Mas')
Begin
set @dpp1= 8
Select Mas*@dpp1 as val1 FROM Cdetail
End

if (@dp2= 'Emk')
Begin
set @dpp2= 7 
Select Emk*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'Tar')
Begin
set @dpp2= 7 
Select Tar*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'San')
Begin
set @dpp2= 7 
Select San*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'Mas')
Begin
set @dpp2= 7 
Select Mas*@dpp2 as val1 FROM Cdetail
End


SELECT 
Namecar,
(Mas*@dpp1)+(San*@dpp1)+(Tar*@dpp1)+(Emk*@dpp1)+(Mas*@dpp2)+(San*@dpp2)+(Tar*@dpp2)+(Emk*@dpp2)
 as finalresult
FROM Cdetail

请注意，这是一个示例，您需要改进它

DECLARE @dp1 varchar (100)
DECLARE @dp2 varchar (100)
DECLARE @dp3 varchar (100)
DECLARE @dp4 varchar (100)

DECLARE @dpp1 int
DECLARE @dpp2 int
DECLARE @dpp3 int
DECLARE @dpp4 int


set @dp1 = 'Emk' >>as example
set @dp2 = 'Mas' >>as example 



if (@dp1= 'Emk')
Begin
set @dpp1= 8 
Select Emk*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'Tar')
Begin
set @dpp1= 8
Select Tar*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'San')
Begin
set @dpp1= 8 
Select San*@dpp1 as val1 FROM Cdetail
End

if (@dp1= 'Mas')
Begin
set @dpp1= 8
Select Mas*@dpp1 as val1 FROM Cdetail
End

if (@dp2= 'Emk')
Begin
set @dpp2= 7 
Select Emk*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'Tar')
Begin
set @dpp2= 7 
Select Tar*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'San')
Begin
set @dpp2= 7 
Select San*@dpp2 as val2 FROM Cdetail
End

if (@dp2= 'Mas')
Begin
set @dpp2= 7 
Select Mas*@dpp2 as val1 FROM Cdetail
End


SELECT 
Namecar,
(Mas*@dpp1)+(San*@dpp1)+(Tar*@dpp1)+(Emk*@dpp1)+(Mas*@dpp2)+(San*@dpp2)+(Tar*@dpp2)+(Emk*@dpp2)
 as finalresult
FROM Cdetail