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Default1.aspx: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default1.aspx.cs" Inherits="Default1"%> <!DOCTYPE html> <html xmlns="http://www."> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <form id="form1" runat="server"> <div> <a href="https://www.csdn.net/">ASP.NET</a><br /> <br /> <a href="https://hao.360.com/">360瀏覽器</a> <br /> <br /> <input id="Button1" type="button" value="button"/> <br /> <br /> <asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"> <asp:ListItem Value="Theme1">Theme1</asp:ListItem> <asp:ListItem Value="Theme2">Theme2</asp:ListItem> </asp:DropDownList> <br /> <br /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <br /> <br /> <asp:TextBox ID="TextBox2" runat="server" SkinID="textboxSkin"></asp:TextBox> </div> </form> </body> </html> Default1.aspx.cs: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { string url = Request.Path + "?theme=" + DropDownList1.SelectedItem.Value; Response.Redirect(url); } void Page_PreInit(Object sender, EventArgs e) { string theme = "Theme1"; if (Request.QueryString["theme"] == null) { theme = "Theme1"; } else { theme = Request.QueryString["theme"]; } Page.Theme = theme; ListItem item = DropDownList1.Items.FindByValue(theme); if (item != null) { item.Selected = true; } } } if (Request.QueryString["theme"] == null) { theme = "Theme1"; //問(wèn)題：設(shè)置theme="Theme1";顯示的就是主題Theme1，如果先設(shè)置了theme="Theme2",就顯示主題Theme2，不能和進(jìn)行動(dòng)態(tài)顯示。 } else { theme = Request.QueryString["theme"]; } 以上深圳市博納網(wǎng)絡(luò)信息技術(shù)有限公司整理（www.sabong.net） |
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