创建一个web user control

1.创建文件

添加，然后选择web user control

2.添加控件

在工具栏搜索button，然后拖动三个button上去

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="LISABackButton.ascx.cs" Inherits="CMSWebParts_LISA_General_LISABackButton" %>
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:ImageButton ID="ImageButton1" runat="server" />
<asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>