asp.net中使用DatagridView的增删改方法具体实现

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using GPS_Web.ywpages.DAL;
using System.Data;
namespace GPS_Web
{
    /// <summary>
    /// 参考的网址：http://blog.csdn.net/wanglei_samrtfish/article/details/8070480
    /// </summary>
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                GridViewBind();
            }
        }
        private void GridViewBind()
        {
            string sql = "select Num,TableName,TextName from dbo.GroupType_Demo";
            try
            {     //绑定数据源
                GridView1.DataSource = SqlHelper.ExecuteDataset(SqlHelper.GetConnSting(), CommandType.Text, sql).Tables[0];
                GridView1.DataBind();
            }
            catch (Exception ex){}
        }
        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_RowEditing(object sender, GridViewEditEventArgs e)
        {  //gridview编辑项索引等于单击行的索引
            GridView1.EditIndex = e.NewEditIndex;
            GridViewBind();
        }
        /// <summary>
        /// 修改事件
        /// </summary>
        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {  //取出编号
            int Num = Convert.ToInt32(((Label)GridView1.Rows[e.RowIndex].FindControl("lblNum")).Text.ToString());
            //获取修改的值的内容
            string TableName = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("txtTableName")).Text;
            string TextName = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("txtTextName")).Text;
            //更新记录
            string sql = string.Format("update dbo.GroupType_Demo set TableName='{0}',TextName='{1}' where Num={2}",TableName,TextName,Num);
            try
            {
                int i = SqlHelper.ExecuteNonQuery(SqlHelper.GetConnSting(), CommandType.Text, sql);
                if (i > 0)
                {
                    ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script language='javascript'>alert('修改成功！')</script>");
                }
                else
                {
                    ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script language='javascript'>alert('修改失败！')</script>");
                }
            }
            catch (Exception ex)
            {
                ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script language='javascript'>alert('操作无效！')</script>");
            }
            GridView1.EditIndex = -1;
            GridViewBind();
        }
        /// <summary>
        /// 删除事件
        /// </summary>
        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            //取出编号
            int Num = Convert.ToInt32(((Label)GridView1.Rows[e.RowIndex].FindControl("lblNum")).Text.ToString());
            //更新记录
            string sql = string.Format("delete dbo.GroupType_Demo where num={0}", Num);
            try
            {
                int i = SqlHelper.ExecuteNonQuery(SqlHelper.GetConnSting(), CommandType.Text, sql);
                if (i > 0)
                {
                    ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script language='javascript'>alert('删除成功！')</script>");
                }
                else
                {
                    ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script language='javascript'>alert('删除失败！')</script>");
                }
            }
            catch (Exception ex)
            {
                ClientScript.RegisterStartupScript(ClientScript.GetType(), "myscript", "<script language='javascript'>alert('操作无效！')</script>");
            }  www.jb51.net
            GridView1.EditIndex = -1;
            GridViewBind();
        }
        /// <summary>
        /// 添加按钮
        /// </summary>
        protected void btnAdd_Click(object sender, EventArgs e)
        {
            Response.Redirect("~/Default_Add.aspx");
        }
        protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
        {
            //行号
            int i = e.NewSelectedIndex;
            GridViewRow row = GridView1.Rows[e.NewSelectedIndex];

            btnAdd.Text = "你选中了第" + (i+1) + "行。";
        }       
    }
}