(ASP.NET)修改和删除DataGrid行——数据库访问

  Add.aspx代码：

<% @ Page language = " c# "  Codebehind = " Add.aspx.cs "  AutoEventWireup = " false "  Inherits = " TeachShow.Charpter7.AccessDataBase.Add "   %>

<! DOCTYPE HTML PUBLIC  " -//W3C//DTD HTML 4.0 Transitional//EN "   >

< HTML >

        < HEAD >

               < title > Add </ title >

               < LINK href = " ../../Style.css "  type = " text/css "  rel = " stylesheet " >

               < meta content = " Microsoft Visual Studio .NET 7.1 "  name = " GENERATOR " >

               < meta content = " C# "  name = " CODE_LANGUAGE " >

               < meta content = " JavaScript "  name = " vs_defaultClientScript " >

               < meta content = " http://schemas.microsoft.com/intellisense/ie5 "  name = " vs_targetSchema " >

        </ HEAD >

        < body MS_POSITIONING = " GridLayout " >

               < form id = " Form1 "  method = " post "  runat = " server " >

                      < div align = " center " >

                             < center >

                                    < table  class = " smallBlack "  height = " 318 "  cellSpacing = " 0 "  cellPadding = " 0 "  width = " 429 "  border = " 0 " >

                                           < tr >

                                                  < td  class = " title "  vAlign = " top "  width = " 429 "  colSpan = " 2 "  height = " 31 " > 添加一个新的发行者 </ td >

                                           </ tr >

                                           < tr >

                                                  < td vAlign = " top "  width = " 79 "  height = " 23 " > 发行者ID： </ td >

                                                  < td vAlign = " top "  width = " 350 "  height = " 23 " >< asp:textbox id = " TextBox1 "  runat = " server "  Height = " 18px "  CssClass = " smallRed " ></ asp:textbox >< FONT face = " 宋体 " > (以99打头，共4位数字) </ FONT ></ td >

                                           </ tr >

                                           < tr >

                                                  < td vAlign = " top "  width = " 79 "  height = " 23 " >< FONT face = " 宋体 " > 姓名： </ FONT ></ td >

                                                  < td vAlign = " top "  width = " 350 "  height = " 23 " >< asp:textbox id = " TextBox2 "  runat = " server "  Height = " 18px "  CssClass = " smallRed " ></ asp:textbox ></ td >

                                           </ tr >

                                           < tr >

                                                  < td vAlign = " top "  width = " 79 "  height = " 23 " >< FONT face = " 宋体 " > 城市： </ FONT ></ td >

                                                  < td vAlign = " top "  width = " 350 "  height = " 23 " >< asp:textbox id = " TextBox3 "  runat = " server "  Height = " 18px "  CssClass = " smallRed " ></ asp:textbox ></ td >

                                           </ tr >

                                           < tr >

                                                  < td vAlign = " top "  width = " 79 "  height = " 23 " >< FONT face = " 宋体 " > 省份： </ FONT ></ td >

                                                  < td vAlign = " top "  width = " 350 "  height = " 23 " >< asp:textbox id = " TextBox4 "  runat = " server "  Height = " 18px "  CssClass = " smallRed " ></ asp:textbox >< FONT face = " 宋体 " > (2个字符) </ FONT ></ td >

                                           </ tr >

                                           < tr >

                                                  < td vAlign = " top "  width = " 79 "  height = " 24 " >< FONT face = " 宋体 " > 国家： </ FONT ></ td >

                                                  < td vAlign = " top "  width = " 350 "  height = " 24 " >< asp:textbox id = " TextBox5 "  runat = " server "  Height = " 18px "  CssClass = " smallRed " ></ asp:textbox ></ td >

                                           </ tr >

                                           < tr >

                                                  < td vAlign = " top "  align = " center "  width = " 429 "  colSpan = " 2 "  height = " 24 " >< asp:linkbutton id = " LinkButton1 "  runat = " server " > 提交到数据库 </ asp:linkbutton ></ td >

                                           </ tr >

                                           < tr >

                                                  < td width = " 429 "  height = " 147 "  valign = " top "  colspan = " 2 " >

                                                         < asp:DataGrid id = " DataGrid1 "  runat = " server "  Height = " 120px "  CssClass = " general "  Width = " 428px " >

                                                                < ItemStyle Width = " 50px " ></ ItemStyle >

                                                                < Columns >

                                                                       < asp:EditCommandColumn ButtonType = " LinkButton "  UpdateText = " 更新 "  CancelText = " 取消 "  EditText = " 编辑 " >

                                                                              < HeaderStyle Width = " 60px " ></ HeaderStyle >

                                                                       </ asp:EditCommandColumn >

                                                                       < asp:ButtonColumn Text = " 删除 "  CommandName = " Delete " ></ asp:ButtonColumn >

                                                                </ Columns >

                                                         </ asp:DataGrid ></ td >

                                           </ tr >

                                    </ table >

                             </ center >

                      </ div >

               </ form >

        </ body >

</ HTML >

 

       Add.asp.cs代码：

using  System;

using  System.Collections;

using  System.ComponentModel;

using  System.Data;

using  System.Data.SqlClient;

using  System.Drawing;

using  System.Web;

using  System.Web.SessionState;

using  System.Web.UI;

using  System.Web.UI.WebControls;

using  System.Web.UI.HtmlControls;

 

namespace  TeachShow.Charpter7.AccessDataBase

{

    /**//// <summary>

    /// Add 的摘要说明。

    /// </summary>

    public class Add : System.Web.UI.Page

    {

        protected System.Web.UI.WebControls.TextBox TextBox1;

        protected System.Web.UI.WebControls.TextBox TextBox2;

        protected System.Web.UI.WebControls.TextBox TextBox3;

        protected System.Web.UI.WebControls.TextBox TextBox4;

        protected System.Web.UI.WebControls.LinkButton LinkButton1;

        protected System.Web.UI.WebControls.DataGrid DataGrid1;

        protected System.Web.UI.WebControls.TextBox TextBox5;

    

        private void Page_Load(object sender, System.EventArgs e)

        {

            // 在此处放置用户代码以初始化页面

            if(!this.IsPostBack)

            {

                this.BindGrid();

            }

        }

 

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码

        override protected void OnInit(EventArgs e)

        {

            //

           // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。

            //

            InitializeComponent();

            base.OnInit(e);

        }

        

        /**//// <summary>

        /// 设计器支持所需的方法 - 不要使用代码编辑器修改

        /// 此方法的内容。

        /// </summary>

        private void InitializeComponent()

        {    

            this.LinkButton1.Click += new System.EventHandler(this.LinkButton1_Click);

            this.DataGrid1.Disposed += new System.EventHandler(this.DataGrid1_Disposed);

            this.DataGrid1.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_CancelCommand);

            this.DataGrid1.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_EditCommand);

            this.DataGrid1.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_UpdateCommand);

            this.DataGrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_DeleteCommand);

            this.DataGrid1.SelectedIndexChanged += new System.EventHandler(this.DataGrid1_SelectedIndexChanged);

            this.Load += new System.EventHandler(this.Page_Load);

 

        }

        #endregion

 

        private void LinkButton1_Click(object sender, System.EventArgs e)

        {

            AddPublisher();

        }

 

        /**//// <summary>

        /// 添加

        /// </summary>

        private void AddPublisher()

        {

            string sql="insert into publishers(pub_id,pub_name,city,state,country) values(@pubid,@pubname,@city,@state,@country)";

 

            SqlConnection con=new SqlConnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");

            SqlCommand cmd=new SqlCommand(sql,con);

 

            cmd.Parameters.Add(new SqlParameter("@pubid",SqlDbType.Char,4));

            cmd.Parameters["@pubid"].Value=this.TextBox1.Text;

            cmd.Parameters.Add(new SqlParameter("@pubname",SqlDbType.VarChar ,40));

            cmd.Parameters["@pubname"].Value=this.TextBox2.Text;

            cmd.Parameters.Add(new SqlParameter("@city",SqlDbType.Char,20));

            cmd.Parameters["@city"].Value=this.TextBox3.Text;

            cmd.Parameters.Add(new SqlParameter("@state",SqlDbType.Char,2));

            cmd.Parameters["@state"].Value=this.TextBox4.Text;

            cmd.Parameters.Add(new SqlParameter("@country",SqlDbType.VarChar ,30));

            cmd.Parameters["@country"].Value=this.TextBox5.Text;

 

            cmd.Connection.Open();

            cmd.ExecuteNonQuery();

            cmd.Connection.Close();

 

            this.TextBox1.Text="";

            this.TextBox2.Text="";

            this.TextBox3.Text="";

            this.TextBox4.Text="";

            this.TextBox5.Text="";

 

            this.BindGrid();

        }

 

        private void BindGrid()

        {

            SqlConnection con=new SqlConnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");

            SqlDataAdapter mysqlcom=new SqlDataAdapter("select * from publishers where pub_id like '99%'",con);

            DataSet myds=new DataSet();

            mysqlcom.Fill(myds,"publishers");

            this.DataGrid1.DataSource=myds.Tables["publishers"].DefaultView ;

            this.DataGrid1.DataBind();

        }

 

        /**//// <summary>

        /// 点击编辑时触发事件

        /// </summary>

        /// <param name="source"></param>

        /// <param name="e"></param>

        private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            this.DataGrid1.EditItemIndex=(int)e.Item.ItemIndex;

            this.BindGrid();

        }

 

        /**//// <summary>

        /// 点击取消时触发该事件。

        /// </summary>

        /// <param name="source"></param>

        /// <param name="e"></param>

        private void DataGrid1_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            this.DataGrid1.Columns[0].HeaderText="已取消";

            this.DataGrid1.EditItemIndex=-1;

            this.BindGrid();

        }

 

        private void DataGrid1_SelectedIndexChanged(object sender, System.EventArgs e)

        {

 

        }

 

        /**//// <summary>

        /// 点击更新时触发该事件。

        /// </summary>

        /// <param name="source"></param>

        /// <param name="e"></param>

        private void DataGrid1_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            SqlConnection con=new SqlConnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");

            SqlCommand selectCmd=con.CreateCommand();

            selectCmd.CommandType=CommandType.Text;

            selectCmd.CommandText="select * from publishers where pub_id like '99%'";

 

            SqlDataAdapter sqlAdatper=new SqlDataAdapter();

            sqlAdatper.SelectCommand=selectCmd;

            DataSet ds=new DataSet();

            con.Open();

            sqlAdatper.Fill(ds,"publishers");

            con.Close();

 

            SqlCommand updateCmd=con.CreateCommand();

            updateCmd.CommandText="update publishers set pub_name=@pubname,city=@city,state=@state,country=@country where pub_id=@pub_id";

            SqlParameter PubNamePar=new SqlParameter("@pubname",SqlDbType.VarChar,40,"pub_name");

            updateCmd.Parameters.Add(PubNamePar);

            SqlParameter CityPar=new SqlParameter("@city",SqlDbType.VarChar,20,"city");

            updateCmd.Parameters.Add(CityPar);

            SqlParameter StatePar=new SqlParameter("@state",SqlDbType.Char,2,"state");

            updateCmd.Parameters.Add(StatePar);

            SqlParameter CountryPar=new SqlParameter("@country",SqlDbType.VarChar,30,"country");

            updateCmd.Parameters.Add(CountryPar);

            SqlParameter PubIDPar=new SqlParameter("@pub_id",SqlDbType.Char,4,"pub_id");

            PubIDPar.SourceVersion=DataRowVersion.Original;

            updateCmd.Parameters.Add(PubIDPar);

 

            sqlAdatper.UpdateCommand=updateCmd;

 

            DataTable table=ds.Tables["publishers"];

            table.PrimaryKey=new DataColumn[]

                {

                    table.Columns["pub_id"]

                };

            DataRow row=table.Rows.Find(((TextBox)(e.Item.Cells[2].Controls[0])).Text);

            row["pub_name"]=((TextBox)(e.Item.Cells[3].Controls[0])).Text;

            row["city"]=((TextBox)(e.Item.Cells[4].Controls[0])).Text;

            row["state"]=((TextBox)(e.Item.Cells[5].Controls[0])).Text;

            row["country"]=((TextBox)(e.Item.Cells[6].Controls[0])).Text;

 

            con.Open();

            sqlAdatper.Update(table);

            con.Close();

 

            this.DataGrid1.EditItemIndex=-1;

            this.BindGrid();

        }

 

        /**//// <summary>

        /// 点击删除时触发该事件

        /// </summary>

        /// <param name="source"></param>

        /// <param name="e"></param>

        private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            SqlConnection con=new SqlConnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");

            SqlCommand selectCmd=con.CreateCommand();

            selectCmd.CommandText="select * from publishers where pub_id like '99%'";

 

            SqlCommand deleteCmd=con.CreateCommand();

            deleteCmd.CommandText="delete from publishers where pub_id=@pub_id";

            SqlParameter PubIdPar=new SqlParameter("@pub_id",SqlDbType.Char,4,"pub_id");

            PubIdPar.SourceVersion=DataRowVersion.Original;

            deleteCmd.Parameters.Add(PubIdPar);

 

            SqlDataAdapter sqlAdapter=new SqlDataAdapter();

            sqlAdapter.SelectCommand=selectCmd;

            sqlAdapter.DeleteCommand=deleteCmd;

 

            DataSet ds=new DataSet();

            con.Open();

            sqlAdapter.Fill(ds,"publishers");

            DataTable table=new DataTable();

            table=ds.Tables["publishers"];

            table.PrimaryKey=new DataColumn[]//定义主键，便于查找

                {

                    table.Columns["pub_id"]

                };

            DataRow row=table.Rows.Find(e.Item.Cells[2].Text);

            row.Delete();

            sqlAdapter.Update(table);

            con.Close();

 

            this.DataGrid1.EditItemIndex=-1;

            this.BindGrid();

        }

 

        private void DataGrid1_Disposed(object sender, System.EventArgs e)

        {

        

        }

    }

}