为了让用户控件能ASP.NET页面实现动态添加，首先写一个接口IGetUCable,这个接口有一个函数，返回对象类型是UserControl.
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; /// <summary> /// Summary description for IGetUCable /// </summary> namespace Insus.NET { public interface IGetUCable { UserControl GetUC(); } }
有了接口之后，需要创建用户控件Calculator.ascx:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Calculator.ascx.cs" Inherits="Calculator" %> Number A: <asp:TextBox runat="server"></asp:TextBox> <br /> + <br /> Number B: <asp:TextBox runat="server"></asp:TextBox><br /> <asp:Button runat="server" Text="=" /> <br /> Result: <asp:Label runat="server" Text=""></asp:Label>
Calculator.ascx.cs,cs实现接口：
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using Insus.NET; public partial class Calculator : System.Web.UI.UserControl,IGetUCable { protected void Page_Load(object sender, EventArgs e) { } protected void ButtonEqual_Click1(object sender, EventArgs e) { decimal a = decimal.Parse(this.TextBox1.Text.Trim()); decimal b = decimal.Parse(this.TextBox2.Text.Trim()); this.LabelResult.Text = (a + b)。ToString (); } public UserControl GetUC() { return this; } }
最后是在需要加载用户控件的aspx的Page_load事件写：
protected void Page_Load(object sender, EventArgs e) { IGetUCable uc1 = (IGetUCable)LoadControl("~/Calculator.ascx"); this.form1.Controls.Add(uc1.GetUC()); }