存储过程实现无限级分类（3）

存储过程实现无限级分类（3）

最后一步显示分类（只是一条select语句）

CREATE PROCEDURE sp_Column_List 
 AS
SELECT Column_ID, Column_Name, Parent_ID, Column_Path, Column_Depth, 
      Column_Order, Column_Intro
FROM Tb_Column
ORDER BY Column_Order
GO

接下来就是在界面呈现了 ，    显示的时候用的是DataGrid

Html代码如下：

<asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False" Width="520px" DataKeyField="Column_Id">
                                <Columns>
                                    <asp:TemplateColumn HeaderText="分类信息">
                                        <ItemTemplate>
                                            <asp:Label id="lbname" runat="server"></asp:Label>
                                        </ItemTemplate>
                                        <EditItemTemplate>
                                            <asp:TextBox id="tbdgname" runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"Column_Name")%>'>
                                            </asp:TextBox>
                                        </EditItemTemplate>
                                    </asp:TemplateColumn>
                                    <asp:TemplateColumn HeaderText="添加子节点">
                                        <ItemTemplate>
                                            <a href="#" onclick="Open('AddSonCate.aspx?fid=<%#DataBinder.Eval(Container.DataItem,"Column_Id")%>','son',280,80)">添加子分类</a>
                                        </ItemTemplate>
                                    </asp:TemplateColumn>
                                    <asp:TemplateColumn HeaderText="编辑">
                                        <ItemTemplate>
                                            <asp:LinkButton runat="server" Text="编辑" CommandName="Edit" CausesValidation="false"></asp:LinkButton>
                                        </ItemTemplate>
                                        <EditItemTemplate>
                                            <asp:LinkButton runat="server" Text="更新" CommandName="Update" CausesValidation="False"></asp:LinkButton>&nbsp;
                                            <asp:LinkButton runat="server" Text="取消" CommandName="Cancel" CausesValidation="false"></asp:LinkButton>
                                        </EditItemTemplate>
                                    </asp:TemplateColumn>
                                    <asp:TemplateColumn HeaderText="删除">
                                        <ItemTemplate>
                                            <asp:LinkButton runat="server" ID="lbdelete" Text="删除" CommandName="Delete" CausesValidation="false" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"Column_Id")%>'>
                                            </asp:LinkButton>
                                        </ItemTemplate>
                                    </asp:TemplateColumn>
                                </Columns>
                            </asp:DataGrid>

最关键的地方在DataGrid_ItemDataBind事件中

private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
        {
            if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                //得到Column_Name字段的值
                string columnName = (string)DataBinder.Eval(e.Item.DataItem,    "Column_Name");
                string columnTemp = "";
                //得到深度值Column_Depth
                int columnDepth = Int32.Parse(DataBinder.Eval(e.Item.DataItem,"Column_Depth").ToString());
                if(columnDepth>1)
                {
                    for(int i = 1;i<columnDepth;i++)
                    {
                        columnTemp +="&nbsp;&nbsp;&nbsp;&nbsp;";
                    }
                    columnTemp+="┝";
                }
                Label lbname = (Label)e.Item.FindControl("lbname");
                lbname.Text = columnTemp+columnName ;
                LinkButton lbdelete = (LinkButton)e.Item.FindControl("lbdelete");
                lbdelete.Attributes.Add("OnClick","JavaScript:return confirm('确实要删掉此分类吗？');");
            }                
        }

Over!