asp.net更新指定记录的方法

  本文实例讲述了asp.net更新指定记录的方法。分享给大家供大家参考。具体方法如下:

  我们先来看html页面:

  

复制代码 代码如下:
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

  <form id="form1" runat="server">

  <div style="text-align: center">

  <table style="width: 302px; height: 246px;">

  <tr>

  <td colspan="2" style="width: 496px">

  <asp:Label ID="Label2" runat="server" Text="更新指定数据" Font-Bold="True" ForeColor="Blue" Width="132px"></asp:Label></td>

  </tr>

  <tr>

  <td colspan="2" style="width: 496px">

  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" Font-Size="Smaller" ForeColor="#333333" GridLines="None">

  <Columns>

  <asp:BoundField DataField="商品编号" HeaderText="商品编号" />

  <asp:BoundField DataField="商品名称" HeaderText="商品名称" />

  <asp:BoundField DataField="商品数量" HeaderText="商品数量" />

  <asp:BoundField DataField="商品单价" HeaderText="商品单价" />

  <asp:HyperLinkField DataNavigateUrlFields="商品编号" DataNavigateUrlFormatString="Default.aspx?商品编号={0}"

  HeaderText="更新" Text="更新" />

  </Columns>

  <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

  <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />

  <EditRowStyle BackColor="#999999" />

  <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />

  <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />

  <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

  <AlternatingRowStyle BackColor="White" ForeColor="#284775" />

  </asp:GridView>

  </td>

  </tr>

  <tr>

  <td colspan="2" style="width: 496px" align="center">

  </td>

  </tr>

  <tr>

  <td colspan="2" style="width: 496px">

  <asp:Label ID="Label3" runat="server" Font-Size="Smaller" Text="商品名称:" Width="65px"></asp:Label><asp:TextBox ID="TxtName" runat="server"></asp:TextBox>

  </td>

  </tr>

  <tr>

  <td colspan="2">

  <asp:Label ID="Label4" runat="server" Font-Size="Smaller" Text="商品数量:"></asp:Label>

  <asp:TextBox ID="TxtNum" runat="server"></asp:TextBox></td>

  </tr>

  <tr>

  <td colspan="2">

  <asp:Label ID="Label5" runat="server" Font-Size="Smaller" Text="商品单价:"></asp:Label>

  <asp:TextBox ID="TxtPrice" runat="server"></asp:TextBox></td>

  </tr>

  <tr>

  <td colspan="2" style="width: 496px">

  <asp:Button ID="BtnUpdate" runat="server" OnClick="BtnUpdate_Click" Text="更新" Width="55px" /></td>

  </tr>

  </table>

  </div>

  </form>

  由上面页面提交过来的数据我们接受然后利用sql执行更新数据库

  

复制代码 代码如下:
View Code

  using System;

  using System.Configuration;

  using System.Data;

  using System.Linq;

  using System.Web;

  using System.Web.Security;

  using System.Web.UI;

  using System.Web.UI.HtmlControls;

  using System.Web.UI.WebControls;

  using System.Web.UI.WebControls.WebParts;

  using System.Xml.Linq;

  using System.Data.SqlClient;

  public partial class _Default : System.Web.UI.Page

  {

  protected void Page_Load(object sender, EventArgs e)

  {

  if (!Page.IsPostBack)//首次执行页面时

  {

  GridViewBind();//绑定自定义方法GridViewBind

  if (Request.QueryString["商品编号"] != null)//判断,如果可以获取到id的值,则执行以下操作

  {

  SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);

  con.Open();

  SqlDataAdapter ada = new SqlDataAdapter("select * from tb_shopping05 where 商品编号=" + Request.QueryString["商品编号"] + "", con);

  DataSet ds = new DataSet();

  ada.Fill(ds, "tb_shopping05");

  DataRowView drv = ds.Tables["tb_shopping05"].DefaultView[0];

  this.TxtName.Text = drv["商品名称"].ToString();

  this.TxtNum.Text = drv["商品数量"].ToString();

  this.TxtPrice.Text = drv["商品单价"].ToString();

  }

  }

  }

  public void GridViewBind()//绑定GridView控件的自定义方法

  {

  SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);

  con.Open();

  SqlDataAdapter ada = new SqlDataAdapter("select * from tb_shopping05", con);

  DataSet ds = new DataSet();

  ada.Fill(ds);

  GridView1.DataSource = ds;

  GridView1.DataBind();

  con.Close();

  }

  protected void BtnUpdate_Click(object sender, EventArgs e)

  {

  try

  {

  SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);

  con.Open();

  SqlCommand com = new SqlCommand("update tb_shopping05 set 商品名称='" + this.TxtName.Text + "',商品数量='" + this.TxtNum.Text + "',商品单价='" + this.TxtPrice.Text + "' where 商品编号=" + Request["商品编号"], con);

  com.ExecuteNonQuery();

  GridViewBind();

  Response.Write("<script language=javascript>alert('恭喜您!信息更新成功!')</script>");

  }

  catch

  {

  Response.Write("<script language=javascript>alert('很遗憾!信息更新失败!')</script>");

  }

  }

  }

  原理是这样的,我们点击经编辑的数据时会传一个ID过来,然后我们再利用sql把接受过来的数据进行update即可了。

  希望本文所述对大家的asp.net程序设计有所帮助。