前台:
<%@ Page language="c#" Codebehind="WebForm30.aspx.cs" AutoEventWireup="false" Inherits="csdn.WebForm30" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm30</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<link href="css.css" rel="stylesheet" type="text/css">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:DataGrid ID="DataGrid1" Runat="server"></asp:DataGrid>
</form>
</body>
</HTML>
背景:
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 csdn
{
/// <summary>
/// WebForm30 的摘要說明。
/// </summary>
public class WebForm30 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此處放置使用者代碼以初始化頁面
if(!IsPostBack)
{
BindGrid();
}
CreateDataGrid();//進行一些DataGrid的設定
}
protected void CreateDataGrid()
{
DataGrid1.AutoGenerateColumns=false;//不啟用自動生成列
DataGrid1.CssClass="border";//邊框樣式
DataGrid1.BorderWidth=0;
DataGrid1.CellSpacing=1;
DataGrid1.CellPadding=5;
DataGrid1.ItemStyle.CssClass="item";//普通列樣式
DataGrid1.HeaderStyle.CssClass="header";//頭樣式
DataGrid1.PagerStyle.CssClass="header";//頁腳樣式
DataGrid1.DataKeyField="stuid";//主鍵字段
DataGrid1.AllowPaging=true;//允許分頁
DataGrid1.PageSize=5;//分頁大小
DataGrid1.PagerStyle.Mode=PagerMode.NumericPages;//數字形式分頁
EditCommandColumn ecc=new EditCommandColumn();//更新按鈕列
ecc.ButtonType=ButtonColumnType.PushButton;//下壓按鈕
ecc.EditText="編輯";
ecc.CancelText="取消";
ecc.UpdateText="更新";//按鈕文字
DataGrid1.Columns.Add(ecc);//增加按鈕列
DataGrid1.EditCommand+=new DataGridCommandEventHandler(DataGrid1_EditCommand);
DataGrid1.UpdateCommand+=new DataGridCommandEventHandler(DataGrid1_UpdateCommand);
DataGrid1.CancelCommand+=new DataGridCommandEventHandler(DataGrid1_CancelCommand);//更新、取消、編輯事件注冊
DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(DataGrid1_PageIndexChanged);//分頁事件注冊,這裡需要注意注冊事件代碼的位置,不能放到BindGrid()中
SetBind(); //綁定資料
protected void BindGrid()
{
TemplateColumn tm=new TemplateColumn();
tm.ItemTemplate=new ColumnTemplate1();//普通列
tm.EditItemTemplate=new ColumnTemplate2();//編輯列
tm.HeaderText="姓名";
DataGrid1.Columns.AddAt(0,tm);//在第一列增加第一個模闆列
TemplateColumn tm2=new TemplateColumn();
tm2.ItemTemplate=new ColumnTemplate3();
tm2.EditItemTemplate=new ColumnTemplate4();
tm2.HeaderText="學院";
DataGrid1.Columns.AddAt(1,tm2);//在第二列增加第一個模闆列
DataGrid1.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(DataGrid1_ItemDataBound);//資料綁定事件注冊,這裡需要注意注冊事件代碼的位置
SetBind();
protected void SetBind()
SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);
SqlDataAdapter da=new SqlDataAdapter("select * from stu,dep where stu.studepid=dep.depid",conn);
DataSet ds=new DataSet();
da.Fill(ds,"table1");
this.DataGrid1.DataSource=ds.Tables["table1"];
this.DataGrid1.DataBind();
private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
SqlDataAdapter da=new SqlDataAdapter("select * from dep",conn);
if(e.Item.ItemType==ListItemType.EditItem)
DropDownList ddl=(DropDownList)e.Item.FindControl("dep");
ddl.DataSource=ds.Tables["table1"];
ddl.DataTextField="depname";
ddl.DataValueField="depid";
ddl.DataBind();
ddl.Items.FindByValue(Convert.ToString(DataBinder.Eval(e.Item.DataItem,"depid"))).Selected=true;
private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
this.DataGrid1.EditItemIndex=e.Item.ItemIndex;
BindGrid();
private void DataGrid1_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
this.DataGrid1.EditItemIndex=-1;
private void DataGrid1_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
string uid=e.Item.UniqueID+":";//注意别遺漏冒号
SqlCommand comm=new SqlCommand("update stu set stuname=@name,studepid=@depid where stuid=@id",conn);
SqlParameter parm1=new SqlParameter("@name",SqlDbType.NVarChar,50);
parm1.Value=Request.Form[uid+"name"].ToString();
SqlParameter parm2=new SqlParameter("@depid",SqlDbType.Int);
parm2.Value=Request.Form[uid+"dep"].ToString();;
SqlParameter parm3=new SqlParameter("@id",SqlDbType.Int);
parm3.Value=this.DataGrid1.DataKeys[e.Item.ItemIndex];
comm.Parameters.Add(parm1);
comm.Parameters.Add(parm2);
comm.Parameters.Add(parm3);
conn.Open();
comm.ExecuteNonQuery();
conn.Close();
BindGrid();
//之是以不能采用以前的((TextBox)e.Item.FindControl("name")).Text來取得資料時因為,DataGrid列是動态添加的,根本取不到
private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
this.DataGrid1.CurrentPageIndex=e.NewPageIndex;
#region Web 窗體設計器生成的代碼
override protected void OnInit(EventArgs e)
//
// CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
InitializeComponent();
base.OnInit(e);
/// <summary>
/// 設計器支援所需的方法 - 不要使用代碼編輯器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
this.Load += new System.EventHandler(this.Page_Load);
#endregion
}
public class ColumnTemplate1 : ITemplate
public void InstantiateIn(Control container)
LiteralControl l = new LiteralControl();
l.DataBinding += new EventHandler(this.OnDataBinding);
container.Controls.Add(l);
public void OnDataBinding(object sender, EventArgs e)
LiteralControl l = (LiteralControl) sender;
DataGridItem container = (DataGridItem) l.NamingContainer;
l.Text = ((DataRowView)container.DataItem)["stuname"].ToString();
public class ColumnTemplate2 : ITemplate
TextBox t = new TextBox();
t.Width=88;
t.ID="name";//需要給一個id,在Request.Form的時候可以取
t.DataBinding += new EventHandler(this.OnDataBinding);
container.Controls.Add(t);
TextBox t= (TextBox) sender;
DataGridItem container = (DataGridItem) t.NamingContainer;
t.Text = ((DataRowView)container.DataItem)["stuname"].ToString();//綁定stuname字段
public class ColumnTemplate3 : ITemplate
l.Text = ((DataRowView)container.DataItem)["depname"].ToString();
public class ColumnTemplate4 : ITemplate
DropDownList dpl = new DropDownList();
dpl.ID="dep";
container.Controls.Add(dpl);
}//這裡沒有為這個下拉框進行資料綁定,在DataGrid1的ItemDataBound中進行了這個操作
}
代碼比較簡單,在代碼中有注釋簡單的解釋。
補充2點:(1)這次的DataGrid是在設計生成的,不是上次的運作時,後者會造成更新的紊亂;(2)處于簡單,代碼中模闆列類沒有很好的封裝,在運用的時候還是應該對字段和模闆列類型(ListItemType)進行封裝