首先看看效果：

Repeater控件，放在ItemTemplate内的铵钮OnClick之后，获取Repeater的Item，ItemIndex，CommandArgument，CommandName以及绑定的字段值。
准备数据：
复制代码 代码如下:
View Code
Imports Microsoft.VisualBasic
Namespace Insus.NET
Public Class Catalog
Private _ID As Integer
Private _Name As String
Public Property ID As Integer
Get
Return _ID
End Get
Set(value As Integer)
_ID = 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
End Class
End Namespace

复制代码 代码如下:
View Code
Private Function GetData() As List(Of Catalog)
Dim cls As New List(Of Catalog)
Dim cl As Catalog = New Catalog()
cl.ID = 1
cl.Name = "汽车"
cls.Add(cl)
cl = New Catalog()
cl.ID = 2
cl.Name = "时尚"
cls.Add(cl)
cl = New Catalog()
cl.ID = 3
cl.Name = "科技"
cls.Add(cl)
cl = New Catalog()
cl.ID = 5
cl.Name = "文化"
cls.Add(cl)
cl = New Catalog()
cl.ID = 6
cl.Name = "公益"
cls.Add(cl)
Return cls
End Function

在.aspx放置Repeater控件：
复制代码 代码如下:
View Code
<asp:Repeater ID="RepeaterCatalog" runat="server">
<HeaderTemplate>
<table border="1" cellpadding="3" cellspacing="0">
<tr>
<td>ID
</td>
<td>Name
</td>
<td>Choose</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<asp:Label ID="LabelID" runat="server" Text='<%# Eval("ID")%>'></asp:Label>
</td>
<td>
<asp:Label ID="LabelName" runat="server" Text='<%# Eval("Name")%>'></asp:Label>
</td>
<td>
<asp:Button ID="Button1" runat="server" Text="Select" OnClick="Button1_Click" CommandArgument='<%# Eval("ID")%>' CommandName="Choose" />
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>

在.aspx.vb为Repeater控件绑定数据：
复制代码 代码如下:
View Code
Imports Insus.NET
Partial Class Default2
Inherits System.Web.UI.Page
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()
Me.RepeaterCatalog.DataSource = GetData()
Me.RepeaterCatalog.DataBind()
End Sub
End Class

接下来，我们写onclick事件，在写事件之前，先在.aspx放一个Label来显示事件结果：
复制代码 代码如下:
Process infor:
<asp:Label ID="LabelInfo" runat="server" Text=""></asp:Label>

复制代码 代码如下:
View Code
Protected Sub Button1_Click(sender As Object, e As EventArgs)
Dim btn As Button = DirectCast(sender, Button)
Dim commandArgument As String = btn.CommandArgument
Dim commandName As String = btn.CommandName
Dim item As RepeaterItem = DirectCast(btn.NamingContainer, RepeaterItem)
Dim index As Integer = item.ItemIndex
Dim id As String = DirectCast(item.FindControl("LabelID"), Label).Text
Dim name As String = DirectCast(item.FindControl("LabelName"), Label).Text
Me.LabelInfo.Text = String.Format("Item index: {0}; CommandArgument: {1}; CommandName: {2}; ID: {3}; Name: {4};", index, commandArgument, commandName, id, name)
End Sub