HTML：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>无标题页</title> </head> <body> <form id="form1" runat="server"> <asp:Button ID="btnClick" runat="server" Text="点我" onclick="btnClick_Click"/> <div> <iframe runat="server" id="frame" src="Demo1.aspx"> </iframe> </div> </form> </body> </html>
后台C#代码：
public partial class WebForm2 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnClick_Click(object sender, EventArgs e) { this.frame.Attributes["src"] = "Demo2.aspx"; } }
