在C＃中，如何基于在gridview行中单击的按钮引用特定的产品记录

Question

I have a page that displays a gridview of products. Inside this table is a column with a hyperlink called "Details." I want to make it so that if the user clicks the details cell for that specific product, a new page will open that gives more information on that product. I'm not sure how I would determine which Product record the details link is in and how I would carry that over to the next page.

Answer 1

You use a HyperlinkField which uses the ID of the product in the querystring.

Here's a sample:

<asp:GridView runat="server" ID="gridViewProducts">
  <Columns>
     <asp:HyperLinkField HeaderText="ProductId" DataNavigateUrlFormatString="ProductDetail.aspx?action=edit&id={0}" DataNavigateUrlFields="ProductId" DataTextField="ProductId"  />
     <asp:BoundField HeaderText="Product Name" DataField="ProductName" />
  </Columns>
</asp:GridView>

When you bind, the productID automatically goes into the querystring

Answer 2

As far as "linking" your product records, programmers do this using unique identifiers. In most circumstances, you'll use an integer.

Historically, people have used the query string to pass database IDs from one page to another. In ASP.NET, you can do this as well. Alternatively, you could store the product ID in the Session and then load that ID from the Session in your new page.

Answer 3

You can take the productId by index property of the gridview. Using that productId, you can navigate to the details of a particular product.