datagrid多项功能（编辑，修改，删除） - 天草降临

<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="LLTEST.WebForm1" %>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
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<HTML>
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<HEAD>
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<title>WebForm1</title>
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<META http-equiv="Content-Type" content="text/html; charset=gb2312">
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</HEAD>
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<body MS_POSITIONING="GridLayout">
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<form id="Form1" method="post" runat="server">
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<asp:datagrid id="MyDataGrid" style="Z-INDEX: 101; LEFT: 56px; POSITION: absolute; TOP: 48px"
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runat="server" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" BackColor="White"
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DataKeyField="CustomerID" CellPadding="4" Font-Names="Verdana" AutoGenerateColumns="False"
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HorizontalAlign="Center" AlternatingItemStyle-BackColor="#eeeeee" HeaderStyle-BackColor="#aaaadd"
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Font-Size="8pt" Font-Name="Verdana" OnPageIndexChanged="MyDataGrid_Page" PagerStyle-HorizontalAlign="Right"
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PagerStyle-Mode="NumericPages" PageSize="8" AllowPaging="True" OnUpdateCommand="MyDataGrid_UpdateCommand"
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OnCancelCommand="MyDataGrid_CancelCommand" OnEditCommand="MyDataGrid_EditCommand">
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<FooterStyle ForeColor="#003399" BackColor="#99CCCC"></FooterStyle>
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<SelectedItemStyle Font-Bold="True" ForeColor="#CCFF99" BackColor="#009999"></SelectedItemStyle>
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<AlternatingItemStyle BackColor="#EEEEEE"></AlternatingItemStyle>
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<ItemStyle ForeColor="#003399" BackColor="White"></ItemStyle>
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<HeaderStyle Font-Bold="True" HorizontalAlign="Center" ForeColor="#CCCCFF" BackColor="#003399"></HeaderStyle>
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<Columns>
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<asp:BoundColumn DataField="CompanyName" HeaderText="公司名称">
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<HeaderStyle Wrap="False" Width="300px"></HeaderStyle>
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<ItemStyle Wrap="False"></ItemStyle>
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<FooterStyle Wrap="False"></FooterStyle>
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</asp:BoundColumn>
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<asp:BoundColumn DataField="ContactName" HeaderText="联系人">
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<HeaderStyle Wrap="False" Width="200px"></HeaderStyle>
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<ItemStyle Wrap="False"></ItemStyle>
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<FooterStyle Wrap="False"></FooterStyle>
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</asp:BoundColumn>
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<asp:TemplateColumn>
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<ItemTemplate>
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<a href="webform1.aspx?Delete=True&cid=<%# DataBinder.Eval(Container.DataItem,"CustomerID")%>" onClick="javascript:return confirm('确认删除？');">删除</a>
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</ItemTemplate>
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<ItemStyle Width="50" HorizontalAlign="center" ForeColor="#aaaadd" />
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</asp:TemplateColumn>
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<asp:EditCommandColumn ButtonType="LinkButton" UpdateText="更新" CancelText="取消" EditText="编辑"></asp:EditCommandColumn>
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</Columns>
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<PagerStyle Visible="False" HorizontalAlign="Left" ForeColor="#003399" BackColor="#99CCCC" Mode="NumericPages"></PagerStyle>
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</asp:datagrid>
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<p style="FONT-SIZE: 9pt" align="center">       
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</p>
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<DIV style="FONT-SIZE: 12px; Z-INDEX: 102; LEFT: 160px; WIDTH: 392px; FONT-FAMILY: 宋体; POSITION: absolute; TOP: 256px; HEIGHT: 40px"
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ms_positioning="GridLayout"><asp:label id="lblPageCount" style="Z-INDEX: 111; LEFT: 8px; POSITION: absolute; TOP: 16px"
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runat="server"></asp:label><asp:label id="lblCurrentIndex" style="Z-INDEX: 111; LEFT: 80px; POSITION: absolute; TOP: 16px"
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runat="server" Width="104px"></asp:label><asp:linkbutton id="btnFirst" style="Z-INDEX: 111; LEFT: 128px; POSITION: absolute; TOP: 16px" onclick="PagerButtonClick"
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runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="0"></asp:linkbutton><asp:linkbutton id="btnPrev" style="Z-INDEX: 111; LEFT: 168px; POSITION: absolute; TOP: 16px" onclick="PagerButtonClick"
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runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="prev"></asp:linkbutton><asp:linkbutton id="btnNext" style="Z-INDEX: 111; LEFT: 216px; POSITION: absolute; TOP: 16px" onclick="PagerButtonClick"
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runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="next"></asp:linkbutton><asp:linkbutton id="btnLast" style="Z-INDEX: 111; LEFT: 264px; POSITION: absolute; TOP: 16px" onclick="PagerButtonClick"
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runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="last"></asp:linkbutton>
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<%--asp:label id="Label1" style="Z-INDEX: 111; LEFT: 320px; POSITION: absolute; TOP: 16px" runat="server">跳转：</asp:label><asp:textbox id="go" style="Z-INDEX: 111; LEFT: 360px; POSITION: absolute; TOP: 8px" Width="20px"
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BorderColor="ActiveCaption" BorderStyle="Dotted" BorderWidth="1px" BackColor="#E0E0E0" AutoPostBack="True" OnTextChanged="goClick" Runat="server"></asp:textbox--%>
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</DIV>
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<asp:TextBox id="tb_search" style="Z-INDEX: 103; LEFT: 128px; POSITION: absolute; TOP: 312px"
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runat="server" Width="312px" Height="24px"></asp:TextBox>
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<asp:Button id="bt_search" style="Z-INDEX: 104; LEFT: 472px; POSITION: absolute; TOP: 312px"
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runat="server" Width="104px" Text="Search"></asp:Button>
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<asp:Label id="Label2" style="Z-INDEX: 105; LEFT: 128px; POSITION: absolute; TOP: 352px" runat="server"
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Width="248px" Height="16px" Font-Size="14px" ForeColor="#ff6600">此处仅以联系人姓名进行检索</asp:Label></form>
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</body>
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</HTML>
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----cs

using System;
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using System.Collections;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Web;
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using System.Web.SessionState;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.HtmlControls;
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using System.Data.SqlClient;
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using System.Configuration;
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namespace LLTEST
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{
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/// <summary>
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/// WebForm1 的摘要说明。
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/// </summary>
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public class WebForm1 : System.Web.UI.Page
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{
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protected System.Web.UI.WebControls.DataGrid MyDataGrid;
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protected System.Web.UI.WebControls.Label lblPageCount;
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protected System.Web.UI.WebControls.Label lblCurrentIndex;
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protected System.Web.UI.WebControls.LinkButton btnFirst;
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protected System.Web.UI.WebControls.LinkButton btnPrev;
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protected System.Web.UI.WebControls.LinkButton btnNext;
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protected System.Web.UI.WebControls.LinkButton btnLast;
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protected System.Web.UI.WebControls.Label Label1;
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protected System.Web.UI.WebControls.TextBox go;
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protected System.Web.UI.WebControls.Button bt_search;
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protected System.Web.UI.WebControls.TextBox tb_search;
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protected System.Web.UI.WebControls.Label Label2;
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private SqlConnection conn= new SqlConnection();
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private void Page_Load(object sender, System.EventArgs e)
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{
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OpenDatabase();
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if (!Page.IsPostBack)
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{
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// 在此处放置用户代码以初始化页面
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btnFirst.Text = "首页";
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btnPrev.Text = "前一页";
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btnNext.Text = "下一页";
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btnLast.Text = "尾页";
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BindGrid();
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if(base.Request.QueryString["Delete"]!=null)
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{
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string aa=base.Request.QueryString["cid"].ToString();
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//由于此处CustomerID为主键，与其他表有关联，所以无法删除。
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string cmdtext="delete from Customers where CustomerID="+"'aa'";
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SqlCommand cmd= new SqlCommand(cmdtext,conn);
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cmd.ExecuteNonQuery();
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BindGrid();
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//Response.Write("删除成功");
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}
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}
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conn.Close();
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}
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private void OpenDatabase()
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{
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conn.ConnectionString=ConfigurationSettings.AppSettings["ConnString"];
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conn.Open();
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}
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private void ShowStats()
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{
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lblCurrentIndex.Text = "第 " + (MyDataGrid.CurrentPageIndex + 1).ToString() + " 页";
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lblPageCount.Text = "总共 " + MyDataGrid.PageCount.ToString() + " 页";
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}
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public void PagerButtonClick(object sender, EventArgs e)
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{
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string arg = ((LinkButton)sender).CommandArgument.ToString();
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switch(arg)
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{
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case "next":
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if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
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{
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MyDataGrid.CurrentPageIndex += 1;
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}
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break;
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case "prev":
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if (MyDataGrid.CurrentPageIndex > 0)
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{
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MyDataGrid.CurrentPageIndex -= 1;
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}
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break;
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case "last":
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MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
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break;
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default:
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MyDataGrid.CurrentPageIndex = System.Convert.ToInt32(arg);
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break;
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}
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BindGrid();
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ShowStats();
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}
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private bool IsNumberic(string oText)
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{
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try
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{
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int var1=Convert.ToInt32 (oText);
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return true;
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}
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catch
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{
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return false;
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}
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}
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public void goClick(object obj,EventArgs e)
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{
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if(go.Text.Trim()!=""&&this.IsNumberic(go.Text.Trim()))
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{
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int index=Int32.Parse(go.Text.Trim())-1;
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if(index>=0 && index<MyDataGrid.PageCount)
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{
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MyDataGrid.CurrentPageIndex=index;
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}
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BindGrid();
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ShowStats();
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}
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else
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{
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Response.Write("<script>alert(\'跳转不能为空且必须为数字\')</script>");
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}
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}
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public void BindGrid()
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{
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SqlConnection myconn=conn;
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DataSet ds = new DataSet();
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SqlDataAdapter da= new SqlDataAdapter("Select CompanyName,ContactName,CustomerID from Customers order by CustomerID desc",myconn);
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da.Fill(ds, "Document");
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MyDataGrid.DataSource = ds.Tables["Document"].DefaultView;
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MyDataGrid.DataBind();
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ShowStats();
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}
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public void MyDataGrid_Page(object sender, DataGridPageChangedEventArgs e)
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{
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int startIndex ;
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startIndex = MyDataGrid.CurrentPageIndex * MyDataGrid.PageSize;
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MyDataGrid.CurrentPageIndex = e.NewPageIndex;
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BindGrid();
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ShowStats();
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}
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//删除事件
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// public void MyDataGrid_DeleteCommand(object source,System.Web.UI.WebControls.DataGridCommandEventArgs e)
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// {
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//
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// int rowToDelete = e.Item.ItemIndex;
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// SqlConnection myconn=conn;
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// int userid=(int)MyDataGrid.DataKeys[rowToDelete];
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// string cmdtext="delete from order where cutomerid="+MyDataGrid.Items[rowToDelete].Cells[0];
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// SqlCommand cmd= new SqlCommand(cmdtext,myconn);
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// cmd.ExecuteNonQuery();
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// BindGrid();
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//
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// }
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//编辑模式
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public void MyDataGrid_EditCommand(object source,System.Web.UI.WebControls.DataGridCommandEventArgs e)
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{
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MyDataGrid.EditItemIndex = e.Item.ItemIndex;
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BindGrid();
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}
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//修改事件
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public void MyDataGrid_UpdateCommand(object source,System.Web.UI.WebControls.DataGridCommandEventArgs e)
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{
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OpenDatabase();
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string ProductID =MyDataGrid.DataKeys[(int)e.Item.ItemIndex].ToString();
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string cpn=((TextBox)e.Item.Cells[0].Controls[0]).Text;
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string ctn=((TextBox)e.Item.Cells[1].Controls[0]).Text;
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string strUpdate="update Customers set CompanyName='"+cpn+"',ContactName='"+ctn+"' where CustomerID='"+ProductID+"'";
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//Response.Write(strUpdate);
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SqlCommand cmd= new SqlCommand(strUpdate,conn);
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cmd.ExecuteNonQuery();
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conn.Close();
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MyDataGrid.EditItemIndex = -1;
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BindGrid();
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ShowStats();
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}
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//取消事件
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public void MyDataGrid_CancelCommand(object source,System.Web.UI.WebControls.DataGridCommandEventArgs e)
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{
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MyDataGrid.EditItemIndex = -1;
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BindGrid();
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//MyDataGrid.DataBind();
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}
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Web 窗体设计器生成的代码
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private void bt_search_Click(object sender, System.EventArgs e)
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{
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Response.Redirect("Search.aspx?keyword="+tb_search.Text.Trim().ToString());
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}
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}
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}
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发表于 2006-02-22 11:13 天草降临阅读(396) 评论(0) 编辑收藏举报