用户控件向网页传递值，方法非常之多，此博文尝试使用反射来实现。在站点中，建一个网页以及一个用户控件。 网页切换至设计模式，拉用户控件至网页上。
Default.aspx:
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <%@ Register Src="InsusUC.ascx" TagName="InsusUC" TagPrefix="uc1" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <uc1:InsusUC ID="InsusUC1" runat="server" /> <br /> <br /> Hi, You input infor as below:<br /> first textbox value: <asp:Label ID="LabelshowFirstValue" runat="server" Text="" ForeColor="Red"></asp:Label><br /> Second textbox value: <asp:Label ID="LabelshowLastValue" runat="server" Text="" ForeColor="Red" ></asp:Label> </div> </form> </body> </html>
Default.aspx.cs，建一个带两个参数的public方法。
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using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } public void ReadUCMessage(string value1, string value2) { this.LabelshowFirstValue.Text = value1; this.LabelshowLastValue.Text = value2; } }
接下来，我们创建一个用户控件:
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<%@ Control Language="C#" AutoEventWireup="true" CodeFile="InsusUC.ascx.cs" Inherits="InsusUC" %> First Name <asp:TextBox ID="TextboxFirstName" runat="server"></asp:TextBox><br /> Last Name <asp:TextBox ID="TextboxLastName" runat="server"></asp:TextBox><br /> <asp:Button ID="ButtonTransmit" runat="server" Text="Transmit" OnClick="ButtonTransmit_Click" />
写铵钮事件，首先引用namespace using System.Reflection;
有关type.InvokeMember()方法，可以参考msdn:http://msdn.microsoft.com/zh-cn/library/de3dhzwy(v=vs.80).aspx
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using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Reflection; public partial class InsusUC : System.Web.UI.UserControl { protected void Page_Load(object sender, EventArgs e) { } protected void ButtonTransmit_Click(object sender, EventArgs e) { string v1 = this.TextboxFirstName.Text.Trim(); string v2 = this.TextboxLastName.Text.Trim(); this.Page.GetType().InvokeMember("ReadUCMessage", BindingFlags.InvokeMethod, null, this.Page, new object[] { v1,v2 }); } }
演示：