ASP.NET BoundFields 未设置 UpdateParameters

Question

我有一些绑定字段，但它们似乎没有为我的 SQL 语句设置 UpdateParameters。我确实有一些在 SqlDataSource Update 上运行的代码来为非绑定字段设置 UpdateParameters，所以我不确定这是否导致了问题。

我在下面插入了我的代码。

ASP.NET GRIDVIEW

    <asp:UpdatePanel ID="reconcileUpdatePanel" runat="server">
        <ContentTemplate>
            <asp:GridView ID="reconcileGrid" runat="server" AutoGenerateColumns="False" 
                DataKeyNames="ItemID" DataSourceID="reconcileDataSource" >
                <Columns>
                    <asp:CommandField ShowEditButton="True" />
                    <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" ReadOnly="true" />
                    <asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" ReadOnly="true"/>
                    <asp:BoundField DataField="last_known_location" HeaderText="Last Known Location" SortExpression="last_known_location" ReadOnly="true" />
                    <asp:TemplateField HeaderText="Status">
                        <ItemTemplate>
                            <asp:Label ID="lblStatus" runat="server" Text='<%# evalStatus(Eval("Stat")) %>'></asp:Label></ItemTemplate><EditItemTemplate>
                            <asp:DropDownList ID="ddlReconcileStatus" runat="server" OnSelectedIndexChanged="ddlReconcileStatus_SelectedIndexChanged" AutoPostBack="true" >
                                <asp:ListItem Value="3" Text="Allocated"></asp:ListItem><asp:ListItem Value="4" Text="Transferred"></asp:ListItem></asp:DropDownList></EditItemTemplate></asp:TemplateField>
                                <asp:TemplateField HeaderText="Transfer Location">
                        <EditItemTemplate>
                            <asp:DropDownList ID="ddlTransferLocation" runat="server" 
                                DataSourceID="ddlTransferLocationDataSource" DataTextField="Name" 
                                DataValueField="ID" Enabled="false" ></asp:DropDownList>
                        <asp:SqlDataSource 
                                ID="ddlTransferLocationDataSource" runat="server" 
                                ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
                                SelectCommand="SELECT [ID], [Name] FROM [TransferLocation]">
                        </asp:SqlDataSource>
                        </EditItemTemplate>
                    </asp:TemplateField>
                </Columns>
            </asp:GridView>
        </ContentTemplate>
    </asp:UpdatePanel>

SQL 数据源

<asp:SqlDataSource ID="reconcileDataSource" runat="server" 
    ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
     OnUpdating="reconcileGrid_Updating" 
    SelectCommand="GetReconcileItems" SelectCommandType="StoredProcedure"
    UpdateCommand="UpdateReconcileItems" UpdateCommandType="StoredProcedure">

    <UpdateParameters>
        <asp:Parameter Name="ItemID" />
        <asp:Parameter Name="TransType" Type="String" />
        <asp:Parameter Name="LocationID" Type="String" />
        <asp:Parameter Name="Description" Type="String" />
        <asp:Parameter Name="Stat" Type="String" />
        <asp:Parameter Name="TransferLocation" Type="String" />
    </UpdateParameters>

</asp:SqlDataSource>

C# SqlDataSourceUpdating

protected void reconcileGrid_Updating(object sender, SqlDataSourceCommandEventArgs e)
    {
      DropDownList ddlReconcileStatus = (DropDownList)reconcileGrid.Rows[reconcileGrid.EditIndex].Cells[0].FindControl("ddlReconcileStatus");
      DropDownList ddlTransferLocation = (DropDownList)reconcileGrid.Rows[reconcileGrid.EditIndex].Cells[0].FindControl("ddlTransferLocation");

      // Set the Stat Value
      reconcileDataSource.UpdateParameters["Stat"].DefaultValue = ddlReconcileStatus.SelectedValue.ToString();

      //Test to see if the value needs to be set or not
      if (ddlReconcileStatus.SelectedValue == "4")
          reconcileDataSource.UpdateParameters["TransferLocation"].DefaultValue = ddlTransferLocation.SelectedValue.ToString();

      if (ddlReconcileStatus.SelectedValue == "3")
          reconcileDataSource.UpdateParameters["TransferLocation"].DefaultValue = null;

      string test1 = reconcileDataSource.UpdateParameters["LocationID"].DefaultValue.ToString();
    }