GridView中用CommandField实现简单的编辑(更新,取消),删除

<asp:GridView ID="GridView1"   AutoGenerateColumns="false"  
        runat="server" onrowdeleting="GridView1_RowDeleting" 
        onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating" 
        onrowcancelingedit="GridView1_RowCancelingEdit"   >
        <Columns>
            <asp:BoundField DataField="ID" ReadOnly="true" HeaderText="项目编号" />
            <asp:BoundField DataField="PlanID" HeaderText="计划编号" />
            <asp:BoundField DataField="ProCode" HeaderText="项目状态" />
            <asp:BoundField DataField="ProName" HeaderText="项目名称" />
            <asp:BoundField DataField="Manager" HeaderText="负责人" />
            <asp:BoundField DataField="Phone" HeaderText="联系电话" />
            <asp:CommandField HeaderText="选择" ShowSelectButton="true" />
            <asp:CommandField HeaderText="编辑" ShowEditButton="true"   />
            <asp:CommandField HeaderText="删除" ShowDeleteButton="true" />
        </Columns>
    </asp:GridView>

代码页：

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                bind();
            }
        }
        protected void bind()    //绑定数据源
        {
            string sqlstr1 = "select * from project";
            DataSet ds= SQLHelper.ExecuteDataSet(sqlstr1);//数据访问函数自定义
            this.GridView1.DataSource = ds;
            this.GridView1.DataKeyNames = new string[] { "id" };//定义主要字段以便后来方便使用
            this.GridView1.DataBind();
        }

//删除操作，利用e.RowIndex获取索引

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            string sqlstr1 = "delete from project where id='"+GridView1.DataKeys[e.RowIndex].Value.ToString()+"'";
            if (SQLHelper.ExecuteNonQuery(sqlstr1) > 0)
            {
                functions.Alert("成功！");
                bind();
            }
            else
            {
                functions.Alert("Fail");
            }
        }

//编辑操作，利用e.NewEditIndex获取当前编辑行索引，要再次绑定显示编辑行的原数据

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

//编辑状态下，更新操作，利用e.RowIndex获取索引，更新完后把当前编辑索引赋值为-1，变回正常显示状态

 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            string sqlstr1 = "update project set id='"+GridView1.Rows[e.RowIndex].Cells[0].ToString().Trim()+"',planid='"+GridView1.Rows[e.RowIndex].Cells[1].ToString().Trim()+"',procode='"+GridView1.Rows[e.RowIndex].Cells[2].ToString().Trim()+"',proname='"+GridView1.Rows[e.RowIndex].Cells[3].ToString().Trim()+"',manager='"+GridView1.Rows[e.RowIndex].Cells[4].ToString().Trim()+"',phone='"+GridView1.Rows[e.RowIndex].Cells[5].ToString().Trim()+"' where id='"+GridView1.DataKeys[e.RowIndex].Value.ToString()+"'";
            if (SQLHelper.ExecuteNonQuery(sqlstr1) > 0)
            {
                GridView1.EditIndex = -1;
                functions.Alert("True");
                bind();
            }
            else
            {
                functions.Alert("False");
            }
        }