Question

我有一个图片很少的页面。还有一个页面，其中基于下拉链接的内容从db中提取。我目前有这个代码！ispostback

private void FillPage()
    {
        ArrayList categoryList = new ArrayList();

        if (!IsPostBack)
        {
            categoryList = ConnectionClass.GetMenuByCategory("Appetizer");
        }
        else
        {
            categoryList = ConnectionClass.GetMenuByCategory(DropDownList1.SelectedValue);
        }

是可能的，基于点击img来改变从开胃菜到img被选中的初始getmenubycategory。谢谢

Answer 1

试试这个：

private void FillPage()
    {
        ArrayList categoryList = new ArrayList();

        if (!IsPostBack)
        {
             if (Request.QueryString["category"] != null) 
             {
                 string categoryName = Request.QueryString["category"] as string;

                 if(!String.IsNullOrEmpty(categoryName)
                 {
                     switch(categoryName)
                     {
                         case "Entree":
                             categoryList = ConnectionClass.GetMenuByCategory("Entree");
                             break;
                         case "Dessert":
                             categoryList = ConnectionClass.GetMenuByCategory("Dessert");
                             break;
                         default:
                             categoryList = ConnectionClass.GetMenuByCategory("Appetizer");
                             break;
                     }
                 }
            }
        }
        else
        {
             categoryList = ConnectionClass.GetMenuByCategory(DropDownList1.SelectedValue);
        }

Answer 2

您可以使用GET方法：

 <a href="go.aspx?img=1"><img src="img1.jpg/></a>
 <a href="go.aspx?img=2"><img src="img2.jpg/></a>

并在代码背后：

if(!String.IsNullOrEmpty(Request.QueryString["img"]))
    if(Request.QueryString["img"]=="1")
        //some initializing
    else
        //another initializing

asp.net根据以前的链接加载页面

2 个答案: