Question

当我将项目输入数据库表并在网页上添加这些项目时，我会遇到此问题。调试后我发现它是这行item.Add（item）;.存储过程确实返回数据库中的项目数量和请购单号码上的项目数。这就是enter image description here的样子，这就是我所期望的enter image description here。我只输入了两个输入的项目，因为我输入了四个项目

存储过程

 @Req_No varchar (50)
AS
BEGIN



        SELECT a.ITEMNMBR, a.ITEMDESC, ab.employee_id, ab.department,ab.employee_name,quantity_requested,b.expense_acc, c.ACTDESCR+'/'+c.ACTNUMBR_1+'-'+c.ACTNUMBR_2 [Expense_Acc],
         b.unit_of_measure
    FROM [TWCL].[dbo].IV00101 a inner Join RequisitionItem b on a.ITEMNMBR = b.item_no
    Inner Join Requisition ab
        on ab.Req_No = b.Req_No
    Inner Join [TWCL].dbo.GL00100 c
        on b.expense_acc = c.ACTINDX
    where b.Req_No = @Req_No

模型

    public List<Item> getRequestItemByRquisition(string Req_No)
{
        List<Item> items = new List<Item>();
        SqlConnection TWCLOPConnect = new SqlConnection(connectionString.ToString());

        SqlCommand itemscommand = new SqlCommand();
        SqlDataReader itemRdr;

        itemscommand.CommandText = "requisition_sp_getItemNum ";
        itemscommand.CommandType = CommandType.StoredProcedure;
        itemscommand.Connection = TWCLOPConnect;
        itemscommand.Parameters.Add("@Req_No", SqlDbType.VarChar).Value = Req_No;

        try
        {
            TWCLOPConnect.Open();
            itemRdr = itemscommand.ExecuteReader();

            while (itemRdr.Read())
            {
                Item item = new Item();
                item.itemNumber = itemRdr.GetString(0);
                item.description = itemRdr.GetString(1);
                item.price = Convert.ToDouble(itemRdr[3]);
                item.quantity = Convert.ToDouble(itemRdr[4]);
                item.expense_account.index = itemRdr.GetInt32(5);
                item.expense_account.account_desc = itemRdr.GetString(6);

                item.selecteduomtext = itemRdr.GetString(8);
                items.Add(item);
            }

            itemRdr.Close();
        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {
            TWCLOPConnect.Close();
        }

        return items;
}

Answer 1

您的存储过程返回重复的行：

    SELECT a.ITEMNMBR, a.ITEMDESC, ab.employee_id, ab.department,ab.employee_name,quantity_requested,b.expense_acc, c.ACTDESCR+'/'+c.ACTNUMBR_1+'-'+c.ACTNUMBR_2 [Expense_Acc],
     b.unit_of_measure
FROM [TWCL].[dbo].IV00101 a inner Join RequisitionItem b on a.ITEMNMBR = b.item_no
Inner Join Requisition ab
    on ab.Req_No = b.Req_No
Inner Join [TWCL].dbo.GL00100 c
    on b.expense_acc = c.ACTINDX
where b.Req_No = @Req_No

在sql中运行此存储过程，您将看到它。

有时使用内连接从DB返回的不匹配或额外数据很容易。一次删除一个内部连接并检查。

所有这一行代码都是：

   itemRdr = itemscommand.ExecuteReader();

            while (itemRdr.Read())
            {
                Item item = new Item();
                item.itemNumber = itemRdr.GetString(0);

        item.description = itemRdr.GetString(1);
                item.price = Convert.ToDouble(itemRdr[3]);
                item.quantity = Convert.ToDouble(itemRdr[4]);
                item.expense_account.index = itemRdr.GetInt32(5);
                item.expense_account.account_desc = itemRdr.GetString(6);

                item.selecteduomtext = itemRdr.GetString(8);
                items.Add(item);
            }

读取您返回的行，当它仍在读取时，它将添加行。这意味着您的存储过程返回了重复的行数。

网页Asp.net MVC上的数据重复

1 个答案: