通过gridview单元过滤SqlDataSource

Question

我创建了一个简单的.aspx 页面，其中包含一个主网格视图 (GridView1)，第二个网格视图 (GridView2) 在第一个的模板字段中。

这些网格视图有 2 个SqlDataSources（SqlDataSource1 和 SqlDataSource2）。

是否可以通过SqlDataSource1（或GridView1）中的值过滤SqlDataDource2（或GridView2）中的行？

我的意思是，对于 GridView1 中的每一行，GridView2 中只有字段 GridView2.PlaceID 和 GridView1.PlaceID 相等的行。 现在我们可以看到 GridView2 中的所有行，以及 GridView1 中的每一行。

代码在这里：

<form id="form1" runat="server">
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DB Places %>" SelectCommand="SELECT [PlaceID], [Place] FROM [Places]" ProviderName="System.Data.SqlClient">
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:DB Devices %>" SelectCommand="SELECT [PlaceID], [DeviceID], [Date] FROM [Devices]"  ProviderName="System.Data.SqlClient">
</asp:SqlDataSource>
<asp:GridView id="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataKeyNames="Код_места" DataSourceID="SqlDataSource1">
    <Columns>
        <asp:BoundField DataField="PlaceID" HeaderText="PlaceID" InsertVisible="False" ReadOnly="True" SortExpression="PlaceID">
        </asp:BoundField>
        <asp:BoundField DataField="Place" HeaderText="Place" SortExpression="Place">
        </asp:BoundField>
        <asp:TemplateField ConvertEmptyStringToNull="False" HeaderText="Devices">
            <ItemTemplate>
                <asp:GridView id="GridView2" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataSourceID="SqlDataSource2">
                    <Columns>
                        <asp:BoundField DataField="PlaceID" HeaderText="PlaceID" SortExpression="PlaceID">
                        </asp:BoundField>
                        <asp:BoundField DataField="DeviceID" HeaderText="DeviceID" ReadOnly="True" SortExpression="DeviceID">
                        </asp:BoundField>
                        <asp:BoundField DataField="Date" HeaderText="Date" SortExpression="Date">
                        </asp:BoundField>
                    </Columns>
                </asp:GridView>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
</form>

提前致谢！

Answer 1

更新

您需要将SqlDataSource2 放在asp:TemplateField 中，并从.cs 代码(GridView1_RowDataBound) 中设置defaultValue。像这样的东西。另请阅读MSDN Walkthrough: Creating a Nested GridView Control

<form id="form1" runat="server">
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DB Places %>" SelectCommand="SELECT [PlaceID], [Place] FROM [Places]" ProviderName="System.Data.SqlClient">
</asp:SqlDataSource>
<asp:GridView id="GridView1" OnRowDataBound="GridView1_RowDataBound" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataKeyNames="PlaceID" DataSourceID="SqlDataSource1">
    <Columns>
        <asp:BoundField DataField="PlaceID" HeaderText="PlaceID" InsertVisible="False" ReadOnly="True" SortExpression="PlaceID">
        </asp:BoundField>
        <asp:BoundField DataField="Place" HeaderText="Place" SortExpression="Place">
        </asp:BoundField>
        <asp:TemplateField ConvertEmptyStringToNull="False" HeaderText="Devices">
            <ItemTemplate>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:DB Devices %>" 
SelectCommand="SELECT [PlaceID], [DeviceID], [Date] FROM [Devices] where PlaceID=@placeid"  ProviderName="System.Data.SqlClient">
   <SelectParameters>
     <asp:Parameter name="placeid" Type="Int32" DefaultValue="" />
</asp:SqlDataSource>
                <asp:GridView id="GridView2" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataSourceID="SqlDataSource2">
                    <Columns>
                        <asp:BoundField DataField="PlaceID" HeaderText="PlaceID" SortExpression="PlaceID">
                        </asp:BoundField>
                        <asp:BoundField DataField="DeviceID" HeaderText="DeviceID" ReadOnly="True" SortExpression="DeviceID">
                        </asp:BoundField>
                        <asp:BoundField DataField="Date" HeaderText="Date" SortExpression="Date">
                        </asp:BoundField>
                    </Columns>
                </asp:GridView>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
</form>

//.cs
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
     //Find data source and set value for parameter
        ((SqlDataSource)e.Row.FindControl("SqlDataSource2")).SelectParameters["placeid"].DefaultValue = ((System.Data.DataRowView)e.Row.DataItem)["placeid"].ToString();
    }
}