c# - 数据绑定(bind) : does not contain a property with the name 'CategoryId' error

Question

我正在学习一个教程并尝试一些东西，当我在这一行遇到这个错误时，有人能给我建议吗，谢谢:

<ItemTemplate>               

<a class='MostPopularItemText' href='ProductDetails.aspx?productID=<%# Eval("ProductId") %>&&CategoryId=<%# Eval("CategoryId") %>'><%# Eval("ModelName") %></a><br />                 

</ItemTemplate>

'CategoryId' 有一些不对的地方，因为如果我把它去掉它会起作用:

<aclass='MostPopularItemText'href='ProductDetails.aspx?productID=<%# Eval("ProductId") %>&&CategoryId=<%# Eval("CategoryId") %>'><%# Eval("ModelName") %></a><br/>    

到

<aclass='MostPopularItemText'href='ProductDetails.aspx?productID=<%# Eval("ProductId") %>'><%# Eval("ModelName") %></a><br/>  

代码隐藏:

private void WriteAlsoPurchased(int currentProduct)

{

   using (CommerceEntities db = new CommerceEntities())

    {

       try

          {

            var v = db.SelectPurchasedWithProducts(currentProduct);

                   RepeaterItemsList.DataSource = v;

                   RepeaterItemsList.DataBind();

           }

       catch (Exception exp)

           {

            throw new Exception("ERROR: Unable to Write Also Purchased - " + exp.Message.ToString(), exp);  <------location where the exception is thrown

            }

      }

}

'SelectPurchasedWithProducts' 存储过程:

ALTER PROCEDURE

dbo.SelectPurchasedWithProducts

@ProductID int

AS

SELECT TOP 5 

OrderDetails.ProductID,

Products.CategoryID,

Products.ModelName,



SUM(OrderDetails.Quantity) as TotalNum

FROM

    OrderDetails

INNER JOIN Products ON OrderDetails.ProductID = Products.ProductID

WHERE

  OrderID IN 

(

/* This inner query should retrieve all orders that have contained the productID */

SELECT DISTINCT OrderID 

FROM OrderDetails

WHERE ProductID = @ProductID

)

AND

OrderDetails.ProductID != @ProductID 

GROUP BY

OrderDetails.ProductID, Products.CategoryID, Products.ModelName 

ORDER BY

TotalNum DESC

RETURN

Answer 1

您的属性名为 CategoryID 而不是 CategoryId

<%# Eval("CategoryId")  %>

应该阅读

<%# Eval("CategoryID")  %>