发布于 2016-06-28 10:36:08 | 107 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程，程序狗速度看过来！

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。

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写个Javascript来判断是否有对RadioButtonList选项选择,附动画演示，感兴趣的朋友可以了解下，希望对您们有帮助
写Javascript来判断是否有对RadioButtonList选项选择，效果如下：

准备好RadioButtonList数据源：
Cosmetic.vb

 
Imports Microsoft.VisualBasic 
Namespace Insus.NET 
Public Class Cosmetic 
Private _ID As Integer 
Private _Type As String 
Private _Name As String 
Private _Weight As Decimal 
Private _UM As String 
Public Property ID As Integer 
Get 
Return _ID 
End Get 
Set(value As Integer) 
_ID = value 
End Set 
End Property 
Public Property Type As String 
Get 
Return _Type 
End Get 
Set(value As String) 
_Type = value 
End Set 
End Property 
Public Property Name As String 
Get 
Return _Name 
End Get 
Set(value As String) 
_Name = value 
End Set 
End Property 
Public Property Weight As Decimal 
Get 
Return _Weight 
End Get 
Set(value As Decimal) 
_Weight = value 
End Set 
End Property 
Public Property UM As String 
Get 
Return _UM 
End Get 
Set(value As String) 
_UM = value 
End Set 
End Property 
Public Sub New() 
End Sub 
Public Sub New(id As Integer, type As String, name As String, weight As Decimal, um As String) 
Me._ID = id 
Me._Type = type 
Me._Name = name 
Me._Weight = weight 
Me._UM = um 
End Sub 
Public Function GetData() As List(Of Cosmetic) 
Dim o As New List(Of Cosmetic) 
Dim c As New Cosmetic(1, "滋润霜", "玉兰油", 50, "g") 
o.Add(c) 
Dim c1 As New Cosmetic(2, "滋润霜", "雅诗兰黛", 100, "g") 
o.Add(c1) 
Dim c2 As New Cosmetic(3, "滋润霜", " 兰蔻", 80, "g") 
o.Add(c2) 
Dim c3 As New Cosmetic(4, "滋润霜", "欧莱雅", 60, "g") 
o.Add(c3) 
Dim c4 As New Cosmetic(5, "滋润霜", "芭比波朗", 120, "g") 
o.Add(c4) 
Return o 
End Function 
End Class 

End Namespace 

在aspx放一个RadioButtonList控件和一个铵钮：

 
化妆品：<asp:RadioButtonList ID="RadioButtonListCosmetic" runat="server" RepeatColumns="10" RepeatDirection="Horizontal"></asp:RadioButtonList> 
<br /> 
<asp:Button ID="Button1" runat="server" Text="Select" /> 

在aspx.vb中，为RadioButtonList绑定数据源，当然绑定数据源下面的代码中，还得引用命名空间 Imports Insus.NET

 
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load 
If Not IsPostBack Then 
Data_Binding() 
End If 
End Sub 
Private Sub Data_Binding() 
Dim objCosmetic As New Cosmetic() 
Me.RadioButtonListCosmetic.DataSource = objCosmetic.GetData() 
Me.RadioButtonListCosmetic.DataTextField = "Name" 
Me.RadioButtonListCosmetic.DataValueField = "ID" 
Me.RadioButtonListCosmetic.DataBind() 
End Sub 

接下来是演示开始，写Javascript代码：

 
View Code 
<script type="text/javascript"> 
function CheckIsSelected() { 
var rbl = document.getElementById("<%=RadioButtonListCosmetic.ClientID%>"); 
var radio = rbl.getElementsByTagName("input"); 
var isSelect = false; 
for (var i = 0; i < radio.length; i++) { 
if (radio[i].checked) { 
isSelect = true; 
break; 
} 
} 
if (!isSelect) { 
alert("请选择一个选项。"); 
} 
return isSelect; 
} 
</script> 

最后是为铵钮Button写客户端事件

 
<asp:Button ID="Button1" runat="server" Text="Select" OnClientClick="return CheckIsSelected()" />