default.aspx.cs

这是asp.net^和Visual C++Sharp编写的串并口通讯的书籍 源代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page 
{
    public string theme;
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    void Page_PreInit(Object sender, EventArgs e)
    {
        if (Request.QueryString["theme"] == null)
        {
            theme = "Themes1";
        }
        else
        {
            theme = Request.QueryString["theme"];
        }

        Page.Theme = theme;//加载主题
        ListItem item = DropDownList1.Items.FindByValue(theme);
        if (item != null)
        {
            item.Selected = true;
        }
    }

    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {

        string url = Request.Path + "?theme=" + DropDownList1.SelectedItem.Value;

        Response.Redirect(url);
    }
}