ASP.NET數(shù)據(jù)綁定的記憶碎片實(shí)現(xiàn)代碼

2020-01-18 00:26:31

字體：大中小

供稿：網(wǎng)友

ASP.NET數(shù)據(jù)綁定的一般情況

1、<%= C#代碼 %> //調(diào)用代碼隱藏頁面的方法、屬性、或者字段
這里一般是調(diào)用屬性和方法比較多，要注意調(diào)用的屬性、方法或者字段的作用域，必須是可以在ASPX頁面可以訪問到的。

代碼示例（ASPX）：<%=Property%>

在（CS）是： public string Property{ get { return "This is a Property";} }
屬性是這樣使用的，方法和字段的使用類似，也是這樣實(shí)現(xiàn)的。

2、<%#數(shù)據(jù)綁定表達(dá)式%>//是在列表控件里面使用的

使用方式一：<%# Eval("FirstName")%>
使用方式二：<%# DataBinder.Eval(Container.DataItem, "SecondName")%>
下面附上我調(diào)試的源碼，可以復(fù)制過去看看

在ASPX頁面：

復(fù)制代碼代碼如下:

 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DataBindEx._Default" %> 
<%@ Import Namespace="System.Data" %> 
<%@ Import Namespace="System.Collections.Generic" %> 
<!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></title> 
</head> 
<body> 
<form runat="server"> 
<div> 
<%=Property%> 
<br /> 
<asp:TextBox ID="TextBox1" Text="This is TextBox of serverClient " runat="server"></asp:TextBox> 
<br /> 
<%=Method()%> 
<br /> 
<br /> 
<asp:Label ID="Label1" runat="server"><%=TextBox1.Text %></asp:Label> 
<br /> 
<%=(Property + " " + Method())%> 
</div> 
<div> 
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="RptAllOnItemDataBound"> 
<HeaderTemplate> 
This is Header<br /> 
</HeaderTemplate> 
<ItemTemplate> 
FirstName:<%# Eval("FirstName")%> 
SecondName:<%# DataBinder.Eval(Container.DataItem, "SecondName")%> 
FullName:<%# (Container.DataItem as DataBindEx.Person).FullName%> 
<asp:Literal ID="Others" runat="server"></asp:Literal> 
<br /> 
</ItemTemplate> 
<FooterTemplate> 
This is footer<br /> 
</FooterTemplate> 
</asp:Repeater> 
</div> 
</form> 
</body> 
</html> 

在CS頁面：

復(fù)制代碼代碼如下:

 

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.MobileControls; 
namespace DataBindEx 
{ 
public class Person 
{ 
public string FirstName 
{ 
get; 
set; 
} 
public string SecondName 
{ 
get; 
set; 
} 
public string FullName 
{ 
get 
{ 
return FirstName + SecondName; 
} 
} 
} 
public partial class _Default : System.Web.UI.Page 
{ 
public string Property 
{ 
get 
{ 
return "This is a Property"; 
} 
} 
protected void Page_Load(object sender, EventArgs e) 
{ 
string str = TextBox1.Text; 
Person per = new Person(); 
per.FirstName= "劉"; 
per.SecondName= "明豐"; 
Person per1 = new Person(); 
per1.FirstName = "林"; 
per1.SecondName = "旺"; 
Person per2 = new Person(); 
per2.FirstName = "陳"; 
per2.SecondName = "仁峰"; 
List<Person> list = new List<Person>(); 
list.Add(per); 
list.Add(per1); 
list.Add(per2); 
Repeater1.DataSource = list; 
Repeater1.DataBind(); 
} 
protected void RptAllOnItemDataBound(object sender, RepeaterItemEventArgs e) 
{ 
Person pe = (Person)e.Item.DataItem; 
Literal lit = e.Item.FindControl("Others") as Literal; 
if (pe !=null) 
switch (pe.FirstName) 
{ 
case "劉": 
lit.Text = "劉喜歡打球"; 
break; 
case "林": 
lit.Text = "林喜歡下棋"; 
break; 
default: 
lit.Text = "陳喜歡c#"; 
break; 
} 
} 
protected string Method() 
{ 
return "This is a Method"; 
} 
} 
} 