利用ASP.NET程式動態產生DataList的TemplateField欄位,並且繫結資料欄位

2008-03-31

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ASP.NET

最近網友問到這方面的問題...

小弟就實作一個範例,分享給大家呀..

asp.net(c#)範例

DatalistDemo.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DatalistDemo.aspx.cs" Inherits="DatalistDemo" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>DatalistDemo</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:DataList ID="DataList1" runat="server" DataSourceID="SqlDataSource1" DataKeyField="id">
            <ItemTemplate>
                id:
                <asp:Label ID="idLabel" runat="server" Text='<%# Eval("id") %>'></asp:Label><br />
                gender:
                <asp:Label ID="genderLabel" runat="server" Text='<%# Eval("gender") %>'></asp:Label><br />
                name:
                <asp:Label ID="nameLabel" runat="server" Text='<%# Eval("name") %>'></asp:Label><br />
                <br />
            </ItemTemplate>
        </asp:DataList></div>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString %>"
            SelectCommand="SELECT * FROM [user]"></asp:SqlDataSource>
    </form>
</body>
</html>

DatalistDemo.aspx.cs

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

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

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

//將下列註解起來,會用.aspx的<ItemTemplate>....</ItemTemplate>設定,結果是一樣的

this.DataList1.ItemTemplate = new DataListTemplate(ListItemType.Item, "id,gender,name");

}

public class DataListTemplate : ITemplate

{

private ListItemType templateType;

private string columnName;

public DataListTemplate(ListItemType type, string colname)

{

templateType = type;

columnName = colname;

}

public void InstantiateIn(System.Web.UI.Control container)

{

switch (templateType)

{

case ListItemType.Item:

foreach (string item in columnName.Split(','))

{

container.Controls.Add(new LiteralControl(item + ":"));

Label data = new Label();

data.ID = item;

data.DataBinding += new EventHandler(data_DataBinding);

container.Controls.Add(data);

container.Controls.Add(new LiteralControl("<br/>"));

}

break;

}

container.Controls.Add(new LiteralControl("<br/>"));

}

private void data_DataBinding(object sender, EventArgs e)

{

Label l = (Label)sender;

DataListItem item = (DataListItem)l.NamingContainer;

l.Text = DataBinder.Eval(item.DataItem,l.ID).ToString();

}

執行結果：

參考網址：
http://msdn2.microsoft.com/en-us/library/y0h809ak(VS.71).aspx
http://forums.asp.net/p/1087842/1623635.aspx
http://blog.blueshop.com.tw/hent/archive/2008/02/24/54382.aspx

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