Question

我制作的代码可以从我的桌子中选择一个随机电影并显示星星，但出于某种原因，当我使用ORDER by newid（）时，我的明星会显示出来这是我的存储过程：

CREATE PROCEDURE [dbo].[select_forside]
AS
   SELECT TOP(1) * 
   FROM [film] 
   INNER JOIN billeder ON film.fk_bil_id = billeder.bill_id 
   ORDER BY newid()

   RETURN 0

和我的代码隐藏：

SqlConnection conn3 = new SqlConnection();
conn3.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ConnectionString;

SqlCommand cmd3 = new SqlCommand();
cmd3.CommandType = CommandType.StoredProcedure;
cmd3.CommandText = "select_forside";
cmd3.Connection = conn3;
//  cmd3.Parameters.Add("@login", SqlDbType.Decimal).Value = Session["login"];

conn3.Open();

SqlDataReader reader3 = cmd3.ExecuteReader();

if (reader3.Read())
{
    int stardisplay = Convert.ToInt32(reader3["film_rating"]);

    // display rating
    rating_panel_display.Visible = true;

    // hvis rating = 1
    if (stardisplay == 1)
    {
        star6.Visible = true;
    }

    // hvis rating = 2
    if (stardisplay == 2)
    {
        star6.Visible = true;
        star7.Visible = true;
    }

    // hvis rating = 3
    if (stardisplay == 3)
    {
        star6.Visible = true;
        star7.Visible = true;
        star8.Visible = true;
    }

    // hvis rating = 4
    if (stardisplay == 4)
    {
         star6.Visible = true;
         star7.Visible = true;
         star8.Visible = true;
         star9.Visible = true;
    }

    // hvis rating = 5
    if (stardisplay == 5)
    {
         star6.Visible = true;
         star7.Visible = true;
         star8.Visible = true;
         star9.Visible = true;
         star10.Visible = true;
    }
}

conn3.Close();

如果我说WHERE film_id = 2它会有效，那么它会显示电影2和正确数量的星星它的某些内容order by newid()但是我不知道我问过的任何人

Answer 1

一个朋友告诉我要删除我的中继器并在阅读器中分配值并为这里的每个人提供帮助

 SqlConnection conn3 = new SqlConnection();
        conn3.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ConnectionString;
        SqlCommand cmd3 = new SqlCommand();
        cmd3.CommandType = CommandType.StoredProcedure;
        cmd3.CommandText = "select_forside";
        cmd3.Connection = conn3;
       //  cmd3.Parameters.Add("@login", SqlDbType.Decimal).Value = Session["login"];

        conn3.Open();
        SqlDataReader reader3 = cmd3.ExecuteReader();
         // Lav en reader som reader alt ud, billede title og rating
        // og så knyt det til dine forskellige ellementer som Lables og Image
        // Det bliver selvfølgelig et problem hvis du skal have flere end en, for så skal du bruger en repeater
        // og jeg ved ikke hvordan man kan kode bagved til at checke stjerne antallet

        if (reader3.Read())
        {
            int stardisplay = (int)Math.Round(Convert.ToDecimal(reader3["film_rating"]), 0);

            // display rating
            rating_panel_display.Visible = true;

            forside_img.ImageUrl = "images/plakater/"+ reader3["bill_sti"] +"";
            forside_h2.Text = "" + reader3["film_navn"] + "";
            forside_p.Text = "" + reader3["film_beskr"] + "";
            film_rating.Text = "" + reader3["film_rating"] + "";


            // hvis rating = 1
            if (stardisplay == 1)
            {
                star6.Visible = true;
            }

            // hvis rating = 2
            if (stardisplay == 2)
            {
                star6.Visible = true;
                star7.Visible = true;
            }

            // hvis rating = 3
            if (stardisplay == 3)
            {
                star6.Visible = true;
                star7.Visible = true;
                star8.Visible = true;
            }

            // hvis rating = 4
            if (stardisplay == 4)
            {
                star6.Visible = true;
                star7.Visible = true;
                star8.Visible = true;
                star9.Visible = true;
            }

            // hvis rating = 5
            if (stardisplay == 5)
            {
                star6.Visible = true;
                star7.Visible = true;
                star8.Visible = true;
                star9.Visible = true;
                star10.Visible = true;
            }
        }
        conn3.Close();

按newid排序（） - 读者没有正确阅读

1 个答案: