GridView的修改，删除，查询

前台代码：

  <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" DataKeyNames="DepartId">
            <Columns>
                <asp:TemplateField>
                    <HeaderTemplate>
                        部门编号
                    </HeaderTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("DepartId") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("DepartId") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <HeaderTemplate>
                        部门名称
                    </HeaderTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("DepartName") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label2" runat="server" Text='<%# Bind("DepartName") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="操作" ShowHeader="False">
                    <EditItemTemplate>
                        <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update" Text="更新"></asp:LinkButton>
                         <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel" Text="取消"></asp:LinkButton>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit" Text="编辑"></asp:LinkButton>
                        <asp:LinkButton ID="LinkButton2" CausesValidation="false" CommandName="Delete" Text="删除" runat="server" />                     
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </div>

后台代码：

public partial class WebForm3 : System.Web.UI.Page
    {
        DepartmentInfoBLL dbll = new DepartmentInfoBLL();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                InitGridView();
            }
        }

        private void InitGridView()
        {
            IList<DepartmentInfo> list = dbll.GetAll();
            this.GridView1.DataSource = list;
            this.GridView1.DataBind();
        }

        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            int departId = int.Parse(e.Keys[0].ToString());
            //执行删除的方法
            dbll.DeleteByDepartId(departId);
            //重新加载数据
            InitGridView();
        }

        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            this.GridView1.EditIndex = e.NewEditIndex;
            InitGridView();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            GridViewRow row = this.GridView1.Rows[e.RowIndex];
            int departId = int.Parse(e.Keys[0].ToString());
            string departName = (row.FindControl("TextBox2") as TextBox).Text;
            //执行修改的方法
            dbll.Update(new DepartmentInfo()
            {
                DepartId = departId,
                DepartName = departName,
                Remark= ""
            });
            //取消编辑状态
            this.GridView1.EditIndex = -1;
            //重新加载一次数据
            InitGridView();
        }

        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            this.GridView1.EditIndex = -1;
            InitGridView();
        }
    }