Question

这是这笔交易，我制作了一个销售某些产品的网站，根据产品的数量，我的按钮数量也有所变化。

例如，如果我有5个产品，我有5个按钮，如下所示：

所以我写了一个代码如下：

            SqlHey SQLViewProducts = new SqlHey();
            DataSet DSViewProducts = new DataSet();
            string Sheilta = "SELECT TblShop.ItemName, TblShop.Price, TblShop.ShopType, TblShop.Image, TblShop.Description FROM TblShop;";
            DSViewProducts = SQLViewProducts.chkData(Sheilta);
            int I;
            for (I = 0; I < DSViewProducts.Tables[0].Rows.Count; I++)
            {
                if (DSViewProducts.Tables[0].Rows.Count % 2 == 0)
                {
                    if (I % 2 == 0)
                        CatalogProducts.InnerHtml += " <div class=\"row\"> <div style=\"position: relative\" class=\"col-lg-3 col-md-4 col-sm-6 col-xs-12 col-sm-push-1 animated bounceInLeft\"> <div class=\"hovereffect\"> <img class=\"img-responsive\" src= \".." + DSViewProducts.Tables[0].Rows[I][3].ToString() + "\"" + " alt=\"\"> <div class=\"overlay\"> <h2>Add to cart<span style=\"font-size: 0.65em\"></span> <asp:Button ID=\"Button1\" runat=\"server\" BackColor=\"Transparent\" BorderStyle=\"None\" ForeColor=\"Transparent\" Height=\"43px\" Style=Height=\"z-index: 99; left: 0px; position: absolute; top: 0px\" Text=\"a\" Width=\"87px\" /></h2> <p class=\"icon-links\">" + DSViewProducts.Tables[0].Rows[I][0].ToString() + "<br /> " + DSViewProducts.Tables[0].Rows[I][4].ToString() + " </p> </div> </div> </div>";
                    else CatalogProducts.InnerHtml += " <div style=\"position: relative\" class=\"col-lg-3 col-md-4 col-sm-6 col-xs-12 col-sm-push-1 animated bounceInLeft\"> <div class=\"hovereffect\"> <img class=\"img-responsive\" src= \".." + DSViewProducts.Tables[0].Rows[I][3].ToString() + "\"" + " alt=\"\"> <div class=\"overlay\"> <h2>Add to cart<span style=\"font-size: 0.65em\"></span> <asp:Button ID=\"Button1\" runat=\"server\" BackColor=\"Transparent\" BorderStyle=\"None\" ForeColor=\"Transparent\" Height=\"43px\" Style=\"z-index: 99; left: 0px; position: absolute; top: 0px\" Text=\"a\" Width=\"87px\" /></h2> <p class=\"icon-links\">" + DSViewProducts.Tables[0].Rows[I][0].ToString() + "<br /> " + DSViewProducts.Tables[0].Rows[I][4].ToString() + " </p> </div> </div> </div> </div> <br /> <br />";
                }

                if (DSViewProducts.Tables[0].Rows.Count % 2 != 0)
                {
                    if (I + 1 == DSViewProducts.Tables[0].Rows.Count)
                        CatalogProducts.InnerHtml += " <div class=\"row\"> <div style=\"position: relative\" class=\"col-lg-3 col-md-4 col-sm-6 col-xs-12 col-sm-push-1 animated bounceInLeft\"> <div class=\"hovereffect\"> <img class=\"img-responsive\" src= \".." + DSViewProducts.Tables[0].Rows[I][3].ToString() + "\"" + " alt=\"\"> <div class=\"overlay\"> <h2>Add to cart<span style=\"font-size: 0.65em\"></span> <asp:Button ID=\"Button1\" runat=\"server\" BackColor=\"Transparent\" BorderStyle=\"None\" ForeColor=\"Transparent\" Height=\"43px\" Style=Height=\"z-index: 99; left: 0px; position: absolute; top: 0px\" Text=\"a\" Width=\"87px\" /></h2> <p class=\"icon-links\">" + DSViewProducts.Tables[0].Rows[I][0].ToString() + "<br /> " + DSViewProducts.Tables[0].Rows[I][4].ToString() + " </p> </div> </div> </div> </div> ";
                    if (I % 2 == 0)
                        CatalogProducts.InnerHtml += " <div class=\"row\"> <div style=\"position: relative\" class=\"col-lg-3 col-md-4 col-sm-6 col-xs-12 col-sm-push-1 animated bounceInLeft\"> <div class=\"hovereffect\"> <img class=\"img-responsive\" src= \".." + DSViewProducts.Tables[0].Rows[I][3].ToString() + "\"" + " alt=\"\"> <div class=\"overlay\"> <h2>Add to cart<span style=\"font-size: 0.65em\"></span> <asp:Button ID=\"Button1\" runat=\"server\" BackColor=\"Transparent\" BorderStyle=\"None\" ForeColor=\"Transparent\" Height=\"43px\" Style=Height=\"z-index: 99; left: 0px; position: absolute; top: 0px\" Text=\"a\" Width=\"87px\" /></h2> <p class=\"icon-links\">" + DSViewProducts.Tables[0].Rows[I][0].ToString() + "<br /> " + DSViewProducts.Tables[0].Rows[I][4].ToString() + " </p> </div> </div> </div> </div> <br /> <br /> <br /> <br />";
                    else CatalogProducts.InnerHtml += " <div style=\"position: relative\" class=\"col-lg-3 col-md-4 col-sm-6 col-xs-12 col-sm-push-1 animated bounceInLeft\"> <div class=\"hovereffect\"> <img class=\"img-responsive\" src= \".." + DSViewProducts.Tables[0].Rows[I][3].ToString() + "\"" + " alt=\"\"> <div class=\"overlay\"> <h2>Add to cart<span style=\"font-size: 0.65em\"></span> <asp:Button ID=\"Button1\" runat=\"server\" BackColor=\"Transparent\" BorderStyle=\"None\" ForeColor=\"Transparent\" Height=\"43px\" Style=Height=\"z-index: 99; left: 0px; position: absolute; top: 0px\" Text=\"a\" Width=\"87px\" /></h2> <p class=\"icon-links\">" + DSViewProducts.Tables[0].Rows[I][0].ToString() + "<br /> " + DSViewProducts.Tables[0].Rows[I][4].ToString() + " </p> </div> </div> </div> </div> <br /> <br />";
                }
            }


           protected void Allbuttons_Click(object sender, EventArgs e)
           {
                string BTNID = ((Button)sender).ID.ToString();
                Session["ItemName"] = BTNID;
                Response.Redirect("ViewItem.aspx");
           }

但点击它时按钮不起作用。我在HTML上写了相同的代码（div one），看看也许，我做错了，按钮确实有效！

这就是我在HTML上编写它时的样子（这是有用的）：

<div class="row">

   <div style="position: relative" class="col-lg-3 col-md-4 col-sm-6 col-xs-12 col-sm-push-1 animated bounceInLeft">
    <div class="hovereffect">
        <img class="img-responsive" src="../User/Pictures/ShirtCheck.png" alt="">
            <div class="overlay">
                <h2>Add to cart<span style="font-size: 0.65em"></span>
                    <asp:Button ID="Button1" runat="server" BackColor="Transparent" BorderStyle="None"
                        ForeColor="Transparent" Height="43px" Style="z-index: 99; left: 0px; position: absolute;
                        top: 0px" Text="a" Width="87px" />
                <p class="icon-links"></p>
            </div>

    </div>
</div>

为什么当我手动编写按钮时，按钮确实有效，当我按照代码执行操作时，他们不会这样做？

Answer 1

这是一个非常基本的示例，但它可以应用于您在应用程序中执行的操作。好的，假设您有这样的数据源：

 protected List<string> ListOfStrings { get; set; }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (ListOfStrings == null)
                ListOfStrings = new List<string>();

            ListOfStrings.Insert(0, "First item");
            ListOfStrings.Insert(1, "Second item");
            ListOfStrings.Insert(2, "Third item");
            ListOfStrings.Insert(3, "Fourth item");
        }

这个数据源是你的产品...我看到你正在为代码背后的ASPX页面生成HTML，这通常被认为是一种不好的做法，因为你希望你的HTML和C＃代码完全分开实现（这是这个答案的目的）。分离HTML和C＃的方法是在ASPX页面中使用绑定表达式，如下所示：

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
    <% for (int i = 0; i < ListOfStrings.Count(); i++)
       {

    %>
       <p><%=ListOfStrings[i] %></p>
    <% } %>

</asp:Content>

通过这种方式，您可以将HTML与C＃代码本身完全分开，如果您需要在HTML本身进行更改，而不是修改C＃代码（我认为），您以后更容易处理HTML是一个痛苦的屁股）...所以总是尝试将您的代码与HTML分开，这是一个很好的做法。希望这可以帮助你.. :)

ASP.NET单击按钮后面的代码不起作用

1 个答案: