如何获取repeater某行第一列的值

<div>
<asp:Repeater ID="Repeater1" runat="server" DataMember="DefaultView"
DataSourceID="SqlDataSource1">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text=<%# Eval("ProductID")%>></asp:Label>
<asp:Label ID="Label2" runat="server" Text=<%# Eval("ProductName")%>></asp:Label>
<br />

</ItemTemplate>
</asp:Repeater>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
SelectCommand="SELECT [ProductID], [ProductName] FROM [Products]">
</asp:SqlDataSource>
<br />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
</div>

protected void Button1_Click(object sender, EventArgs e)
{
Label textControl = (Label)Repeater1.Items[3].FindControl("Label1");
//textControl.Text 就是你需要的值
}

foreach (RepeaterItem rs in Repeater1.Items)
{
string str = ((Label)rs.FindControl("控件ID")).Text;
}