GridView与CheckBox

         <asp:GridView ID="gridFlow" DataKeyNames="id" runat="server" AutoGenerateColumns="False" CellPadding="4"
             ForeColor="Black" GridLines="Vertical" Width="100%" BackColor="White" BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px" CaptionAlign="Left" ShowFooter="True" AllowPaging="True" OnPageIndexChanging="gridFlow_PageIndexChanging" OnRowDataBound="gridFlow_RowDataBound" PageSize="20" OnDataBinding="gridFlow_DataBinding">
             <FooterStyle BackColor="#CCCC99" />
             <Columns>
                 <asp:TemplateField>
                     <ItemTemplate>
                         <asp:CheckBox ID="CheckBox1" runat="server" />
                     </ItemTemplate>
                     <HeaderTemplate>
                         <input id="CheckAll" type="checkbox" onclick="selectAll(this);" />
                     </HeaderTemplate>
                 </asp:TemplateField>
                 <asp:BoundField DataField="Flow_Main_Date" HeaderText="录入日期" />
                 <asp:BoundField DataField="Flow_Account_Name" HeaderText="帐户" />
                 <asp:BoundField DataField="Flow_Class_Name" HeaderText="类别"/>
                 <asp:BoundField DataField="Flow_Main_Income" HeaderText="增加" />
                 <asp:BoundField DataField="Flow_Main_Expense" HeaderText="减少" />
                 <asp:BoundField DataField="Flow_Family_Name" HeaderText="人员" />
                 <asp:BoundField DataField="Flow_Main_Info" HeaderText="摘要" />
             </Columns>
             <RowStyle BackColor="#F7F7DE" HorizontalAlign="Center" />
             <SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
             <PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />
             <HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />
             <AlternatingRowStyle BackColor="White" />
             <PagerSettings Mode="NumericFirstLast" NextPageText="[下一页]" PreviousPageText="[上一页]" />
         </asp:GridView>

 

 

    /**//// <summary>
    /// 获取或设置选中项的集合
    /// </summary>
    protected ArrayList SelectedItems
    ...{
        get
        ...{
            return (ViewState["mySelectedItems"] != null) ? (ArrayList)ViewState["mySelectedItems"] : null;
        }
        set
        ...{
            ViewState["mySelectedItems"] = value;
        }
    }

 /**//// <summary>
    /// 从当前页收集选中项的情况
    /// </summary>
    protected void CollectSelected()
    ...{
        ArrayList selectedItems = null;
        if (this.SelectedItems == null)
            selectedItems = new ArrayList();
        else
            selectedItems = this.SelectedItems;

        for (int i = 0; i < this.gridFlow.Rows.Count; i++)
        ...{
           // string id = this.gridFlow.Rows[i].Cells[1].Text;
            string id = gridFlow.DataKeys[i].Value.ToString();
            CheckBox cb = this.gridFlow.Rows[i].FindControl("CheckBox1") as CheckBox;
            if (selectedItems.Contains(id) && !cb.Checked)
                selectedItems.Remove(id);
            if (!selectedItems.Contains(id) && cb.Checked)
                selectedItems.Add(id);
        }
        this.SelectedItems = selectedItems;
    }

    protected void gridFlow_DataBinding(object sender, EventArgs e)
    ...{
        //在每一次重新绑定之前，需要调用CollectSelected方法从当前页收集选中项的情况
        CollectSelected();
    }

    protected void gridFlow_RowDataBound(object sender, GridViewRowEventArgs e)
    ...{
        //这里的处理是为了回显之前选中的情况
        if (e.Row.RowIndex > -1 && this.SelectedItems != null)
        ...{
            DataRowView row = e.Row.DataItem as DataRowView;
            CheckBox cb = e.Row.FindControl("CheckBox1") as CheckBox;
            if (this.SelectedItems.Contains(row["id"].ToString()))
                cb.Checked = true;
            else
                cb.Checked = false;
        }
   }

   /**//// <summary>
    /// 删除选中项的记录
    /// </summary>
    protected void btnDel_Click(object sender, EventArgs e)
    ...{
        //最后，需要对选中项进行操作之前，不能忘了还要最后一次收集当前页的选中情况
        CollectSelected();
        string tempSelected = string.Empty;
        foreach (object tmp in this.SelectedItems)
        tempSelected += tmp.ToString() + ",";
        tempSelected = tempSelected.Remove((tempSelected.Length - 1), 1);

        int result;
        string errmsg = string.Empty;
        result = ModuleSql.SqlDelete("Flow_Main", "id in (" + tempSelected + ")", ref errmsg);
        if (result == 0x0)
        ...{
            // 成功
            ShowMessage(UrlCurrentPage, app.MessageDefaultStayTime, "删除成功");
        }
        else
        ...{
            ShowMessage(errmsg, app.MessageDefaultStayTime, errmsg);//错误提示
        } 
    }