GridView 更新和删除语句损坏

Question

我对 asp.net 和 GridView 相对较新，我很难完成以下任务： 我的数据库中有三个表：

    Bookings    
    --------------------------------------------------------
    id  |   start_date  |   end_date   |  user_id  | pet_id
    ----|---------------|--------------|-----------|--------
    1   |   01/04/2011  |  01/04/2011  |     1     |    2
    --------------------------------------------------------

    Pets    
    ---------------------------------------------------------
     id  |  name       | species  |  owner_id  | caretaker_id
    -----|-------------|----------|------------|-------------
      1  |  samplename |   dog    |      1     |     2
    ---------------------------------------------------------

    Users    
    ------------------------------------------------------------------------
      id  |  email               | first_name  |  last_name   | password
    ------|----------------------|-------------|--------------|-------------
       1  |  test@test.gmail.com |   Name      |      Surname | passwordhere
    ------------------------------------------------------------------------

我试图做的是使用数据网格来显示预订表中的信息，使其可编辑，以便用户可以编辑他的宠物的预订。使用自动 sql 语句的初始尝试运行良好，SELECT * from [bookings] 返回了预订表，我能够删除和更新行。 我决定使用新的选择查询，以便用户可以清楚地看到他的宠物的名字和他作为主人的名字，而不是数字。我使用了以下选择查询，效果很好：

    select start_date, end_date, usr.first_name AS 'Owner', pets.name AS 'Pet name' from  
    bookings AS bookings left join users AS usr ON bookings.user_id=usr.id left join
    pets AS pets ON pets.id=bookings.pet_id

    Output    
        ----------------------------------------------------------
           start_date  |  end_date   | Owner       |  Pet name   | 
        ---------------|-------------|-------------|-------------|
           01/04/2011  |  01/04/2011 |   Name      |  samplename | 
        ----------------------------------------------------------

---

现在问题来了：从我将 GridView 中的选择查询更新到提到的那个时，删除和更新语句都不起作用。当然我会提供自定义的，但无论我尝试什么，它总是返回错误incorrect syntax near nvarchar。 我也不确定 pet_id 列是整数还是应该是字符串，因为它在新的连接选择中显示宠物的名称而不是它的 id？

我不知道我在这里做错了什么。我很感激任何帮助。下面是 GridView 的代码：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1">
        <Columns>
            <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
            <asp:BoundField DataField="start_date" HeaderText="start_date" SortExpression="start_date" />
            <asp:BoundField DataField="end_date" HeaderText="end_date" SortExpression="end_date" />
            <asp:BoundField DataField="Owner" HeaderText="Owner" SortExpression="Owner" />
            <asp:BoundField DataField="Pet name" HeaderText="Pet name" SortExpression="Pet name" />
        </Columns>
    </asp:GridView>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:pph_database %>" SelectCommand="select start_date, end_date, usr.first_name AS 'Owner', pets.name AS 'Pet name' from bookings AS bookings left join users AS usr ON bookings.user_id=usr.id left join pets AS pets ON pets.id=bookings.pet_id" UpdateCommand="UPDATE [bookings] SET [start_date] = @start_date, [end_date] = @end_date, [user_id] = @user_id, [pet_id] = @pet_id WHERE [id] = @id" DeleteCommand="DELETE FROM [bookings] WHERE [id] = @id" InsertCommand="INSERT INTO [bookings] ([start_date], [end_date], [user_id], [pet_id]) VALUES (@start_date, @end_date, @user_id, @pet_id)">
        <DeleteParameters>
            <asp:Parameter Name="id" Type="Int32" />
        </DeleteParameters>
        <InsertParameters>
            <asp:Parameter DbType="Date" Name="start_date" />
            <asp:Parameter DbType="Date" Name="end_date" />
            <asp:Parameter Name="user_id" Type="Int32" />
            <asp:Parameter Name="pet_id" Type="Int32" />
        </InsertParameters>
        <UpdateParameters>
            <asp:Parameter DbType="Date" Name="start_date" />
            <asp:Parameter DbType="Date" Name="end_date" />
            <asp:Parameter Name="user_id" Type="Int32" />
            <asp:Parameter Name="pet_id" Type="Int32" />
            <asp:Parameter Name="id" Type="Int32" />
        </UpdateParameters>
    </asp:SqlDataSource>

Answer 1

也许你会这样做：

<asp:GridView ID="GridView1" runat="server" DataMember="Table"
   EnableModelValidation="True" CssClass = "GridViewStyle" 
   OnRowDeleting = "dataViewRowDeleting" AutoGenerateDeleteButton="True"
   OnRowEditing = "dataViewRowEditing" AutoGenerateEditButton="True"
   OnRowUpdating = "dataViewRowUpdating"> 
    <Columns>
    ...
    </Columns>           
</asp:GridView>

您可以将事件 dataViewRowDeleting 与行删除和 dataViewRowEditing 与行编辑相关联。