Question

我有2个表机组和机器。 MachineGroups有列：

MachinegroupID
MachineGroupName
MachineGroupDesc

And Machines有专栏：

MachineGroupID (FK)
MachineID
MachineName
Machinedesc

现在我要删除一个机器组，但不删除那些有机器的机器组。

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

这将删除gridview中没有的所有行。机器= 0 我想要的是只删除单击删除链接的行...

<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>

Answer 1

未经测试，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>

从gridview中删除行

1 个答案: