使用数据库中的数据的动态HTML元素

时间:2017-04-24 20:29:35

标签: javascript c# jquery html css

我目前正在尝试创建一个网站,当使用下拉列表选择某个Make,Model,Year时,该网站会动态显示项目。使用利用HtmlAgilityPack的网络爬行检索项目信息。

所以我目前有一个数据库表,其中包含数千个包含列的项:id,Make,Model,Year,PartCategory,PartUrl,ImageUrl,PartBrand,PartName,PartPrice。

我尝试做的是将每个网站分成div,以便用户可以轻松地告诉他们所查看的项目来自哪个网站。例如:

<div id="siteOne">
  <table>
    <tr>
      <td>
        <img url="ImageUrl">
        <a href="PartUrl">PartBrand & PartName & PartPrice</a>
      </td>
    </tr>
    <tr>
      <td>
        <img url="ImageUrl">
        <a href="PartUrl">PartBrand & PartName & PartPrice</a>
      </td>
    </tr>
  </table>
</div>
<div id="siteTwo">
  .............
</div>
<div id=""siteThree>
  .............
</div>

我目前只使用三个站点,我可以轻松地将数据拉入DataTable,然后查看返回了多少行,因此该数量将是我需要创建的动态实例数。我非常确定Jquery可以处理这项工作,但是我找不到任何人使用DataTable的DataRows来控制动态部分的例子,通常是使用按钮事件或类似的东西。

我想代码看起来像这样:

//this foreach statement will be in the last dropdown list's SelectedIndexChanged event
//when the last dropdown is chosen, a datatable will be returned with all the items that match that particular make/model/year
foreach (DataRow tempRow in tempDataTable)
{
  //this should pull data from each column one at a time
  //column: 0 = id, 1 = Make, 2 = Model, 3 = Year, don't think I'll need these right now
  string partCategory = tempRow[4].ToString();
  string partUrl = tempRow[5].ToString();
  string imageUrl = tempRow[6].ToString();
  string partBrand = tempRow[7].ToString();
  string partName = tempRow[8].ToString();
  string partPrice = tempRow[9].ToString();

  //this is where the jquery would generate the dynamic elements in the table. 
  //three main divs can be hard coded for now, only using 3 sites currently
  //this means the <table></table> in each will most likely be hard coded as well
  //the <tr></tr>, <td></td>, <img>, and <a></a> will need to be generated dynamically each loop iteration
}

我已经在这一步上工作了一段时间所以我想我会发帖,看看是否有人有任何提示或类似的例子,而我自己继续尝试解决它。任何事都会非常感激。干杯!

1 个答案:

答案 0 :(得分:1)

我想通了,而且很容易。

继承人我的功能是如何设置的

    protected void drpdwnYear_SelectedIndexChanged(object sender, EventArgs e)
    {
        //get the data for the specific make/model/year from the database
        DataTable dt = new DataTable();
        string tempYear = drpdwnYear.SelectedItem.ToString();
        string tempManufacturer = Globals.myManufacturer;
        string tempModel = Globals.myModel;
        Globals.myQuery = "SELECT * FROM CrawlerInfo WHERE Model = '" + tempModel + "' AND Year ='" + tempYear + "'";
        try
        {
            using (SqlConnection con = new SqlConnection(Globals.myConStr))
            {
                using (SqlCommand cmd = new SqlCommand(Globals.myQuery, con))
                {
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        da.Fill(dt);
                    }
                }
            }
        }
        catch (Exception ex)
        {
            handleTheError(ex);
        }

        //put the data into HTML elements
        try
        {
            int tempflag = 0;
            foreach (DataRow tempRow in dt.Rows)
            {
                string tempCategory = tempRow[4].ToString();
                string tempPartUrl = tempRow[5].ToString();
                string tempImageUrl = tempRow[6].ToString();
                string tempPartBrand = tempRow[7].ToString();
                string tempPartName = tempRow[8].ToString();
                string tempPrice = tempRow[9].ToString();
                string tempStoreName = tempRow[10].ToString();

                Image tpImg = new Image();
                tpImg.ID = "id_img_" + tempflag;
                tpImg.ImageUrl = tempImageUrl;
                Page.Controls.Add(tpImg);

                HyperLink hyp = new HyperLink();
                hyp.ID = "id_link_" + tempflag;
                hyp.NavigateUrl = tempPartUrl;
                hyp.Text = tempPartBrand + " " + tempPartName + ": " + tempPrice + "\n\n";
                Page.Controls.Add(hyp);
                tempflag++;
            }
        }
        catch (Exception ex)
        {
            handleTheError(ex);
        }
    }

这里显示它当前显示,我只需要弄清楚如何将它们放入<div>中,以便我可以设置它们的样式。 Website current look