0

我编写了从表中选择随机电影并显示星星的代码，但由于某种原因，当我使用 ORDER by newid() 时，我的星星可能无法显示，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();

如果我说它WHERE film_id = 2会显示电影 2 和正确数量的星星，它会起作用，order by newid()但我不知道我问过的任何人也不知道

4

1 回答 1

0

一个朋友告诉我删除我的中继器并在阅读器中分配值并为帮助而工作，这里是解决方案

 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();
于 2015-03-13T10:32:22.803 回答