多个 DataKeyNames 不过滤 sqldatasource

Question

1. 我在一个页面上有两个网格视图，它们都绑定到一个 sqldatasource。第一个 gridview (GVMonthReport) 显示表格中的数据
2. 我的目标是从 GVMonthReport 中选择一行来过滤另一个表 (GridView2) sqldatasource 中的三个项目（Location、Trans_Budget_Code、Transaction Date）。
3. 问题如下：我可以使用其中一个过滤项（Location 或 Trans_Budget_Code）和相应的 GridView2 过滤器，两者都有效。但是，当我将 Location 和 Trans_Budget_Code 一起尝试作为过滤器时，GridView2 上没有显示任何内容。我可以手动将值放入 Trans_Budget_Code 和 Location 的 GridView2s sqldatasource 中，结果是我所期望的。为什么这有效，但当我在 GVMonthReport 中选择一行时无效。
4. 我认为这与 GVMonthReports DataKeyNames（“Trans_Budget_Code,Location”）有关。但到目前为止，我没有运气。 Trans_Budget_Code 和 Location 不是主键是这个问题吗？

<asp:SqlDataSource ID="MonthUsed0" runat="server" , SelectCommand="SELECT DISTINCT dbo.[ID Inventory$].[Item Description], dbo.[ID Transactions This Week$].Location, dbo.[ID Transactions This Week$].[Trns Date], dbo.[ID Transactions This Week$].Budget, dbo.[ID Inventory$].[Item Number] FROM dbo.[ID Transactions This Week$] INNER JOIN dbo.[ID Inventory$] ON dbo.[ID Transactions This Week$].[Item Number] = dbo.[ID Inventory$].[Item Number] WHERE (dbo.[ID Transactions This Week$].Location = @Location) AND (dbo.[ID Transactions This Week$].Budget = @Trans_Budget_Code)"
UpdateCommand="UPDATE zBudgetDetails SET Budget_ID = @Budget_ID, Budget_Account_ID = @Budget_Account_ID, Amount = @Amount, Memo = @Memo WHERE (Budget_Detail_ID = @Budget_Detail_ID)">
  <SelectParameters>
    <asp:ControlParameter ControlID="GVMonthReport" Name="Location" PropertyName="SelectedValue" />
    <asp:ControlParameter ControlID="GVMonthReport" Name="Trans_Budget_Code" PropertyName="SelectedValue" />
  </SelectParameters>
  <UpdateParameters>
    <asp:Parameter Name="Budget_ID" Type="Int32" />
    <asp:Parameter Name="Budget_Account_ID" Type="Int32" />
    <asp:Parameter Name="Amount" Type="Decimal" />
    <asp:Parameter Name="Memo" Type="String" />
    <asp:Parameter Name="Budget_Detail_ID" Type="Int32" />
  </UpdateParameters>
</asp:SqlDataSource>
<br />
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" DataSourceID="MonthUsed0" style="margin-top: 1px">
  <Columns>
    <asp:BoundField DataField="Item Description" HeaderText="Item Description" SortExpression="Item Description" />
    <asp:BoundField DataField="Location" HeaderText="Location" SortExpression="Location" />
    <asp:BoundField DataField="Trns Date" HeaderText="Trns Date" SortExpression="Trns Date" />
    <asp:BoundField DataField="Budget" HeaderText="Budget" SortExpression="Budget" />
    <asp:BoundField DataField="Item Number" HeaderText="Item Number" SortExpression="Item Number" />
  </Columns>
</asp:GridView>
<br />
<br />
<br />
<asp:GridView ID="GVMonthReport" runat="server" AllowPaging="True" AllowSorting="True" DataKeyNames="Trans_Budget_Code,Location" AutoGenerateColumns="False" CellPadding="4" DataSourceID="MonthReport" ForeColor="#333333" GridLines="None" style="margin-right: 0px; margin-top: 0px;">
  <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
  <Columns>
    <asp:BoundField DataField="No#" HeaderText="No#" ReadOnly="True" SortExpression="No#" />
    <asp:BoundField DataField="Transaction Type" HeaderText="Transaction Type" ReadOnly="True" SortExpression="Transaction Type" />
    <asp:BoundField DataField="Trans_Budget_Code" HeaderText="Trans_Budget_Code" ReadOnly="True" SortExpression="Trans_Budget_Code" />
    <asp:BoundField DataField="Location" HeaderText="Location" ReadOnly="True" SortExpression="Location" />
    <asp:BoundField DataField="Supplier/Employee Name" HeaderText="Supplier/Employee Name" ReadOnly="True" SortExpression="Supplier/Employee Name" />
    <asp:BoundField DataField="Project Code" HeaderText="Project Code" ReadOnly="True" SortExpression="Project Code" />
    <asp:BoundField DataField="WOID" HeaderText="WOID" ReadOnly="True" SortExpression="WOID" />
    <asp:BoundField DataField="Transaction Date" HeaderText="Transaction Date" ReadOnly="True" SortExpression="Transaction Date" />
    <asp:BoundField DataField="Craft" HeaderText="Craft" ReadOnly="True" SortExpression="Craft" />
    <asp:BoundField DataField="Transaction Description" HeaderText="Transaction Description" ReadOnly="True" SortExpression="Transaction Description" />
    <asp:BoundField DataField="Purpose Description" HeaderText="Purpose Description" ReadOnly="True" SortExpression="Purpose Description" />
    <asp:BoundField DataField="Quantity" HeaderText="Quantity" ReadOnly="True" SortExpression="Quantity" />
    <asp:BoundField DataField="Unit Cost" HeaderText="Unit Cost" ReadOnly="True" SortExpression="Unit Cost" />
    <asp:BoundField DataField="Total Cost" HeaderText="Total Cost" ReadOnly="True" SortExpression="Total Cost" />
    <asp:BoundField DataField="Purchased by" HeaderText="Purchased by" ReadOnly="True" SortExpression="Purchased by" />
    <asp:CommandField ShowSelectButton="True" />
  </Columns>
  <EditRowStyle BackColor="#999999" />
  <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
  <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
  <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
  <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
  <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
  <SortedAscendingCellStyle BackColor="#E9E7E2" />
  <SortedAscendingHeaderStyle BackColor="#506C8C" />
  <SortedDescendingCellStyle BackColor="#FFFDF8" />
  <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
<br />
<asp:SqlDataSource ID="MonthReport" runat="server" SelectCommand="SELECT No#, [Transaction Type], Trans_Budget_Code, Location, [Supplier/Employee Name], [Project Code], WOID, [Transaction Date], Craft, [Transaction Description], [Purpose Description], Quantity, [Unit Cost], [Total Cost], [Purchased by] FROM dbo.[MD Transactions] WHERE ([WO Budget Code] = @Acount) AND (YEAR([Transaction Date]) = @yeardate) AND (MONTH([Transaction Date]) = @monthdate) AND (Trans_Budget_Code = 'Maintenance') UNION ALL SELECT No#, [Transaction Type], Trans_Budget_Code, Location, [Supplier/Employee Name], [Project Code], WOID, [Transaction Date], Craft, [Transaction Description], [Purpose Description], Quantity, [Unit Cost], [Total Cost], [Purchased by] FROM dbo.[MD Transactions This Week$] WHERE ([WO Budget Code] = @Acount) AND (YEAR([Transaction Date]) = @yeardate) AND (MONTH([Transaction Date]) = @monthdate) AND (Trans_Budget_Code = 'Maintenance')"
UpdateCommand="UPDATE zBudgetDetails SET Budget_ID = @Budget_ID, Budget_Account_ID = @Budget_Account_ID, Amount = @Amount, Memo = @Memo WHERE (Budget_Detail_ID = @Budget_Detail_ID)">
  <SelectParameters>
    <asp:ControlParameter ControlID="DDLMonthAcount" Name="Acount" PropertyName="SelectedValue" />
    <asp:ControlParameter ControlID="DDLYear" Name="yeardate" PropertyName="SelectedValue" />
    <asp:ControlParameter ControlID="DDLMonth" Name="monthdate" PropertyName="SelectedValue" />
  </SelectParameters>
  <UpdateParameters>
    <asp:Parameter Name="Budget_ID" Type="Int32" />
    <asp:Parameter Name="Budget_Account_ID" Type="Int32" />
    <asp:Parameter Name="Amount" Type="Decimal" />
    <asp:Parameter Name="Memo" Type="String" />
    <asp:Parameter Name="Budget_Detail_ID" Type="Int32" />
  </UpdateParameters>
</asp:SqlDataSource>

Answer 1

为 <asp:SqlDataSource ID="MonthUsed0" .../> 定义的设置似乎存在问题

<asp:ControlParameter .../>的PropertyName属性应该如下设置

<SelectParameters>
    <asp:ControlParameter ControlID="GVMonthReport" Name="Location"
         PropertyName="SelectedDataKey.Values[1]" />
    <asp:ControlParameter ControlID="GVMonthReport" 
         Name="Trans_Budget_Code" PropertyName="SelectedDataKey.Values[0]" />
  </SelectParameters>

这里的[0]和[1]代表了GridView的DataKeyNames属性中定义的Keys的位置。

设置PropertyName="SelectedValue" 将只使用DataKeyNames 属性中定义的FIRST Column 的值。

您可以将PropertyName 参数显式设置为列名称：

PropertyName="SelectedDataKey.Values["Location"]"