获取Repeter的Item和ItemIndex

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：

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

 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：

 <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：

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：

Process infor:
<asp:Label ID="LabelInfo" runat="server" Text=""></asp:Label>

 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