在没有列表视图的情况下很难绑定元素值

本文关键字：很难 绑定 元素 情况下 列表 视图 | 更新日期: 2023-09-27 18:12:07

在我的页面上，我想从后面的代码中插入一个值到页面内的元素。这是我的代码后面，我想添加每个标签或图像，它的值没有gridview或listview或数据。下面的代码需要更新，因为它不工作，所以我从你们的帮助。

我必须创建一个屏幕记录，我已经更新了我上面的帖子，我希望这将解释我正在寻找的东西:-)

输入链接描述

代码:

    protected void Page_Load(object sender, EventArgs e)
    {
        try {
            SqlConnection showads = new SqlConnection(cs);
            SqlCommand CMDshowads = new SqlCommand("SELECT * FROM ads where AdsID = @AID", showads);
            SqlDataReader adsdetread = CMDshowads.ExecuteReader();

            int i = 0;
    while (adsdetread.Read())
    {
        Image imgthum1 = new Image();
        imgthum1.ID = "Img1" + i;
        imgthum1.ImageUrl = adsdetread["Img1"].ToString();
        Image imgthum2 = new Image();
        imgthum2.ID = "Img2" + i;
        imgthum2.ImageUrl = adsdetread["Img2"].ToString();
        Image imgthum3 = new Image();
        imgthum3.ID = "Img3" + i;
        imgthum3.ImageUrl = adsdetread["Img1"].ToString();
        Image imgthum4 = new Image();
        imgthum4.ID = "Img4" + i;
        imgthum4.ImageUrl = adsdetread["Img2"].ToString();
        Image imgthum5 = new Image();
        imgthum5.ID = "Img5" + i;
        imgthum5.ImageUrl = adsdetread["Img1"].ToString();

        Label adstitledetailsshow = new Label();
        adstitledetailsshow.ID = "adstitledetailsshow" + i;
        adstitledetailsshow.Text = adsdetread["AdsTit"].ToString();
        Label Label1 = new Label();
        Label1.ID = "Label1" + i;
        Label1.Text = adsdetread["AdsID"].ToString();
        Label Label5 = new Label();
        Label5.ID = "Label5" + i;
        Label5.Text = adsdetread["AdsPrice"].ToString();
        Label Label11 = new Label();
        Label11.ID = "Label11" + i;
        Label11.Text = adsdetread["Website"].ToString();
        Label Label2 = new Label();
        Label2.ID = "Label2" + i;
        Label2.Text = adsdetread["Section"].ToString();
        Label Label4 = new Label();
        Label4.ID = "Label4" + i;
        Label4.Text = adsdetread["Category"].ToString();
        Label Label6 = new Label();
        Label6.ID = "Label6" + i;
        Label6.Text = adsdetread["Country"].ToString();
        Label Label7 = new Label();
        Label7.ID = "Label7" + i;
        Label7.Text = adsdetread["State"].ToString();
        Label Label8 = new Label();
        Label8.ID = "Label8" + i;
        Label8.Text = adsdetread["City"].ToString();
        Label Label3 = new Label();
        Label3.ID = "Label3" + i;
        Label3.Text = adsdetread["UID"].ToString();
        Label Label10 = new Label();
        Label10.ID = "Label10" + i;
        Label10.Text = adsdetread["AdsDate"].ToString();


        //add your controls here.
        container.Controls.Add(imgthum1);
        container.Controls.Add(imgthum2);
        container.Controls.Add(imgthum3);
        container.Controls.Add(imgthum4);
        container.Controls.Add(imgthum5);
        container.Controls.Add(Label1);
        container.Controls.Add(Label5);
        container.Controls.Add(Label11);
        container.Controls.Add(Label2);
        container.Controls.Add(Label4);
        container.Controls.Add(Label6);
        container.Controls.Add(Label7);
        container.Controls.Add(Label8);
        container.Controls.Add(Label3);
        container.Controls.Add(Label10);

        i++;
    }
  }
  catch 
  {
     adsdetreqLikeqpopup.Show();
  }
}

在没有列表视图的情况下很难绑定元素值

如果您不希望使用ASP. html. NET中继器控件，那么你应该自己把所有的控件设置为动态的。所以基本上你需要为你的控件设置一个容器首先，我们在你的页面上设置一个DIV标签就像这样(记住要在里面添加runat和id属性):

   <div runat="server" id="container"></div>

那么在while循环中你可以这样写:

        int i = 0;
        while (adsdetread.Read())
        {
            //your images
            Image img1 = new Image();
            img1.ID = "img" + i;
            img1.ImageUrl = adsdetread["Img1"].ToString();
            Image img2 = new Image();
            img2.ID = "img" + i;
            img2.ImageUrl = adsdetread["Img2"].ToString();
            //rest of your images here
            //your labels
            Label lbl = new Label();
            lbl.ID = "lbl" + i;
            lbl.Text = adsdetread["AdsID"].ToString();
            Label lbl2 = new Label();
            lbl2.ID = "lbl" + i;
            lbl2.Text = adsdetread["AdsID"].ToString();
            //rest of your labels here

            //add your controls here.
            container.Controls.Add(img1);
            container.Controls.Add(img2);
            container.Controls.Add(lbl);
            container.Controls.Add(lbl2);
            //add the rest of your controls here
            i++;
        }
更新1:

在将字符串值分配给控件之前检查它们，您可以在每行执行以下操作:

img1.ImageUrl = adsdetread["Img1"] != null ? adsdetread["Img1"].ToString() : string.Empty;
更新2:

在你的sql命令中有一个缺失的部分，你没有设置AdsID的值，你的sql部分应该是这样的:

 using (var connection= new SqlConnection(cs))
 {
     using (var command = new SqlCommand())
     {
         command.Connection = connection;
         connection.Open();
         command.CommandText = "SELECT * FROM ads where AdsID = @AID";
         command.Parameters.AddWithValue("@AID", your value here);
         using (var reader = command.ExecuteReader())
         {
             int i = 0;
             while (reader.Read())
             {
                 //....
             }
         }
     }
  }
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