C# 从gridview中删除行

我有两张桌子，机器组和机器。机器组具有以下列：

MachinegroupID
MachineGroupName
MachineGroupDesc

MachineGroupID (FK)
MachineID
MachineName
Machinedesc

机器有很多列：

MachinegroupID
MachineGroupName
MachineGroupDesc

MachineGroupID (FK)
MachineID
MachineName
Machinedesc

现在我想删除一个机器组，但不想删除其中包含机器的机器组

DELETE FROM MachineGroups
 WHERE MachineGroupID NOT IN (SELECT DISTINCT MachineGroupID FROM Machines)

这将删除gridview中机器数为0的所有行 我想要的是只删除其删除链接被单击的行

<asp:GridView ID="GridView1" runat="server" AllowSorting="True"
    AutoGenerateColumns="False" CellPadding="1" CellSpacing="2"
    DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None"
     Width="100%" ondatabound="GridView1_DataBound1"
    onrowdatabound="GridView1_RowDataBound1">
    <RowStyle BackColor="#D0D8E8" ForeColor="#333333" Height="35px" />
    <Columns>
        <asp:BoundField DataField="MachineGroupID" HeaderText="MachineGroupID" 
            InsertVisible="False" ReadOnly="True" SortExpression="MachineGroupID" 
            Visible="False" />
        <asp:BoundField DataField="MachineGroupName" HeaderText="MachineGroupName" 
            SortExpression="MachineGroupName" />
        <asp:BoundField DataField="MachineGroupDesc" HeaderText="MachineGroupDesc" 
            SortExpression="MachineGroupDesc" />
        <asp:BoundField DataField="TimeAdded" HeaderText="TimeAdded" 
            SortExpression="TimeAdded" />
        <asp:TemplateField HeaderText="CanBeDeleted" SortExpression="CanBeDeleted" 
            Visible="False">
            <EditItemTemplate>
                <asp:CheckBox ID="CheckBox1" runat="server"
                    Checked='<%# Bind("CanBeDeleted") %>' />
            </EditItemTemplate>
            <ItemTemplate>
                <asp:CheckBox ID="CheckBox1" runat="server"
                    Checked='<%# Bind("CanBeDeleted") %>' Enabled="false" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="No. of PCs" HeaderText="No. of PCs" ReadOnly="True"
            SortExpression="No. of PCs" />
        <asp:TemplateField ShowHeader="False">
            <ItemTemplate>
                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False"
                    CommandName="Delete" Text="Delete"></asp:LinkButton>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>


<asp:SqlDataSource ID="SqlDataSource1" runat="server"         ConnectionString="<%$ ConnectionStrings:SumooHAgentDBConnectionString %>" 
    SelectCommand="SELECT MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted, COUNT(Machines.MachineName) AS 'No. of PCs' FROM MachineGroups FULL OUTER JOIN Machines ON Machines.MachineGroupID = MachineGroups.MachineGroupID GROUP BY MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted" 
    DeleteCommand="DELETE FROM MachineGroups
 WHERE MachineGroupID NOT IN (SELECT DISTINCT MachineGroupID FROM Machines)">
    <DeleteParameters>
        <asp:Parameter Name="original_MachineGroupID" />
        <asp:Parameter Name="original_MachineGroupName" />
        <asp:Parameter Name="original_MachineGroupDesc" />
        <asp:Parameter Name="original_CanBeDeleted" />
        <asp:Parameter Name="original_TimeAdded" />
    </DeleteParameters>
</asp:SqlDataSource>

---

未测试，但方向应正确：

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
    ConnectionString="<%$ ConnectionStrings:SumooHAgentDBConnectionString %>" 
    SelectCommand="SELECT MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted, COUNT(Machines.MachineName) AS 'No. of PCs' FROM MachineGroups FULL OUTER JOIN Machines ON Machines.MachineGroupID = MachineGroups.MachineGroupID GROUP BY MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted" 
    DeleteCommand="DELETE FROM MachineGroups WHERE MachineGroupID = @MachineGroupID">
    <DeleteParameters>
        <asp:Parameter Name="MachineGroupID" />
    </DeleteParameters>
</asp:SqlDataSource>

---

未测试，但方向应正确：

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
    ConnectionString="<%$ ConnectionStrings:SumooHAgentDBConnectionString %>" 
    SelectCommand="SELECT MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted, COUNT(Machines.MachineName) AS 'No. of PCs' FROM MachineGroups FULL OUTER JOIN Machines ON Machines.MachineGroupID = MachineGroups.MachineGroupID GROUP BY MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted" 
    DeleteCommand="DELETE FROM MachineGroups WHERE MachineGroupID = @MachineGroupID">
    <DeleteParameters>
        <asp:Parameter Name="MachineGroupID" />
    </DeleteParameters>
</asp:SqlDataSource>

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