如何編寫存儲過程，其輸入參數是從下拉列表中選擇的內容，並將結果傳遞到空白文本框中？

Question

這是我的過程，我已在SQL Management Studio中成功執行了該過程，但無法使其在Visual Studio中運行。 當我在Visual Studio中運行它時，不會讓我選擇輸入參數，因此我想在用戶從應用程序下拉菜單中選擇的輸入參數中運行它。

步驟如下：

Create PROCEDURE [dbo].[GetLastCustomerID_CustomerTypeSelect]
(@CustomerType varchar(20)= Null) 
-- Add the parameters for the stored procedure here
--@CustomerType varchar = 'Norcross' 

 AS
 BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

-- Insert statements for procedure here
Select case @CustomerType
When 'Norcross'
Then (SELECT  MAX(custnum)
from TSarCustomer 
where dbo.ParseAlphaChars(CustNum) between 25000 and 79999 and OpenedDate >      
dateadd(d,-120,GETDATE()))
When 'Gaffey'
Then(SELECT  MAX(custnum)
from TSarCustomer
where (dbo.ParseAlphaChars(CustNum) between 80000 and 150000) and OpenedDate    > dateadd(d,-120,GETDATE()))
When 'CranePro'
then (SELECT  MAX(dbo.ParseAlphaChars(CustNum))
from TSarCustomer
where CustNum like '%K' and OpenedDate > '1/1/2012')
When 'CranePro'
then(SELECT  MAX(dbo.ParseAlphaChars(CustNum))
from TSarCustomer
where CustNum like '%C' and OpenedDate > '1/1/2005')
When 'Internet'
Then (SELECT  MAX(dbo.ParseAlphaChars(CustNum))
from TSarCustomer
where CustNum like '%W' and OpenedDate > '1/1/2012')
When 'M'
Then (SELECT  MAX(dbo.ParseAlphaChars(CustNum))
from TSarCustomer
where CustNum like '%M' and OpenedDate > '1/1/2012')
end

end

這是我的下拉菜單代碼，該下拉菜單的選項是從表中提取的。

       <tr>
        <td class="auto-style3">Customer Type:</td>
        <td colspan="1" class="auto-style4">
            <asp:DropDownList ID="DropDownListCustomerType" AutoPostBack="true" runat="server" DataSourceID="SqlDataSourceCustomerType" DataTextField="CustomerType" DataValueField="CustomerType" Height="22px" Width="113px">
            </asp:DropDownList>
            <asp:SqlDataSource ID="SqlDataSourceCustomerType" runat="server" ConnectionString="<%$ ConnectionStrings:AceWOMConnectionString %>" SelectCommand="SELECT * FROM [CustomeryType]"></asp:SqlDataSource>
        </td>
        <td class="auto-style3" >
            Assign Take-Stock#:</td>
        <td class="auto-style3"> 
            <asp:TextBox ID="TSCustomerNumber" runat="server">

            </asp:TextBox>
        </td>
    </tr>

因此，我需要幫助弄清楚用戶選擇下拉菜單時如何運行存儲過程，從下拉菜單中進行選擇，將其作為輸入參數傳遞給存儲過程，然后將過程的結果發布到標識為“ TSCustomerNumber”的空白文本框

任何和所有幫助將不勝感激！

Answer 1

在下拉列表中使用onselectedindexchanged事件處理程序。

onselectedindexchanged="itemSelected"

然后在您的代碼后面創建一個方法來處理事件並獲取dropdownlist值作為參數，調用SP傳入參數，並在完成后更新文本框：

protected void itemSelected(object sender, EventArgs e)
{
    var val = DropDownListCustomerType.SelectedItem.Value;
    using (SqlConnection con = new SqlConnection(myDataConnection)) {
     using (SqlCommand cmd = new SqlCommand("GetLastCustomerID_CustomerTypeSelect", con)) {
       cmd.CommandType = CommandType.StoredProcedure;
       cmd.Parameters.Add("@CustomerType", SqlDbType.VarChar).Value = val;

     con.Open();
     TSCustomerNumber.Text = (String) cmd.ExecuteScalar();
   }
  }
}

那至少應該讓你接近...

Answer 2

string query = "select Fechacumplimiento from TTareasIngreso where descripcion='" + dprTarea.Text + "' and descripcion='" + lblagencia.Text + "' ";
            SqlCommand cmd = new SqlCommand(query, conn);

            SqlDataReader dr = cmd.ExecuteReader();

            if (dr.Read())
            {

                TxtFechaPago.Text = dr["Fechacumplimiento"].ToString();


            }
        }