怎么后台获取当前点击的ID

<asp:LinkButton ID="lbBrank_0" runat="server" onclick="lbClick" CommandArgument="lbBrank_0">全部</asp:LinkButton>

给LinkButton增加一个CommandArgument属性，值跟ID值一样，然后在事件中获取值即可
public void lbClick(object sender,EventArgs e)
{
     string id = e.CommandArgument.ToString().Trim();
     Response.Write(id);
}