GridView 编辑、更新、取消

//前台：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        onrowcancelingedit="GridView1_RowCancelingEdit" DataKeyNames="RollMessageID" 
        onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating">
        <Columns>
            <asp:BoundField DataField="RollMessageID" HeaderText="编号" Visible="False" />
            <asp:BoundField DataField="Heading" HeaderText="姓名" />
            <asp:CommandField ShowEditButton="True" />
        </Columns>
    </asp:GridView>

//后台：

         protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindDataInfo();
            }

        }

//绑定数据
        protected void BindDataInfo()
        {
            RollMessageBusiness rm = new RollMessageBusiness();
            GridView1.DataSource = rm.GetAllRollMessage();
            GridView1.DataBind();
        }

//编辑按钮

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

//更新按钮

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            string id = GridView1.DataKeys[e.RowIndex].Value.ToString();
            string strhead = ((TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]).Text;

            RollMessageBusiness rmb = new RollMessageBusiness();
            rmb.UpdateRollMessage(id, strhead);
            GridView1.EditIndex = -1;
            BindDataInfo();
        }

//取消按钮

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