GridView实现编辑删除

前台界面：

  <asp:GridView ID="GridView1" runat="server" Width="100%" CellPadding="4" ForeColor="#333333"
                            AutoGenerateColumns="False" AllowPaging="True" PageSize="12" OnRowCancelingEdit="GridView1_RowCancelingEdit"
                            OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnRowDeleting="GridView1_RowDeleting"
                            DataKeyNames="id" OnPageIndexChanging="GridView1_PageIndexChanging" 
                            GridLines="None" BorderStyle="Groove">
                            <Columns>
                                <asp:BoundField HeaderText="编号" DataField="id" Visible="false" />
                                <asp:BoundField HeaderText="序号" DataField="num" ReadOnly="True" />
                                <asp:BoundField DataField="name" HeaderText="隧道名称" ReadOnly="True" />
                                <asp:BoundField DataField="tunnelClassName" HeaderText="隧道类别" ReadOnly="True" />
                                <asp:TemplateField HeaderText="起始点">
                                    <ItemTemplate>
                                        <%# Eval("PointStart")%>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:TextBox ID="tbStart" Text='<%# Eval("PointStart") %>' runat="server" Width="90px" />
                                    </EditItemTemplate>
                                    <ItemStyle Width="100px" />
                                </asp:TemplateField>
                                <asp:TemplateField HeaderText="长度">
                                    <ItemTemplate>
                                        <%# Eval("Length")%>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:TextBox ID="tbLength" Text='<%# Eval("Length") %>' runat="server" Width="90px" />
                                    </EditItemTemplate>
                                    <ItemStyle Width="100px" />
                                </asp:TemplateField>
                                <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" HeaderText="操作" />
                            </Columns>
                            <PagerSettings FirstPageText="" LastPageText="" NextPageText="" PreviousPageText="" />
                            <RowStyle Height="20px" BackColor="#FFF3EE" ForeColor="#333333" HorizontalAlign="Center"/>
                            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                            <EditRowStyle BackColor="#999999" />
                            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                            <PagerStyle BackColor="#FE6D38" ForeColor="Black" HorizontalAlign="Center" />
                            <HeaderStyle BackColor="#FE6D38" Font-Bold="True" ForeColor="Black"/>
                            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
         </asp:GridView>

后台代码：

 protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridViewBind();
    }

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

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
        string connStr = ConfigurationManager.ConnectionStrings["NMXT_DBConn"].ConnectionString;
        string SqlStr = "delete from TN_TunnelBlankPoints where id=" + id;

        try
        {
            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlCommand comm = new SqlCommand(SqlStr, conn);
            comm.ExecuteNonQuery();
            comm.Dispose();
            if (conn.State.ToString() == "Open") conn.Close();

            GridView1.EditIndex = -1;
            GridViewBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }

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

    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
        string strStart = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("tbStart")).Text;
        string strLength = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("tbLength")).Text;

        string connStr = ConfigurationManager.ConnectionStrings["NMXT_DBConn"].ConnectionString;
        string SqlStr = " update TN_TunnelBlankPoints set PointStart=" + strStart + ",Length=" + strLength + " where id=" + id;

        try
        {
            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlCommand comm = new SqlCommand(SqlStr, conn);
            comm.ExecuteNonQuery();
            comm.Dispose();
            if (conn.State.ToString() == "Open") conn.Close();

            GridView1.EditIndex = -1;
            GridViewBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }