jeudi 10 novembre 2016

C# - "An element with the same key was already added"

I work in ASP.NET MVC and I am blocked(surrounded) in my model with this damned error " an element with the same key was already added", I understand not at all why while I have almost the same code with different requests in other methods of my model.

And I do not think that the problem can come from the request because I have already used her(it) as before in another project..

Here is the code of my model:

public Dictionary<string,string> getDonnee()
    Dictionary<string, string> list = new Dictionary<string, string>();

    SqlConnection cn;
    SqlDataAdapter da;
    DataSet ds;

    cn = new SqlConnection(CS_DW);

    da = new SqlDataAdapter("select distinct(ltrim(rtrim(cpic))) as code, cpic as lib from [DW].[dbo].[PIC_PROD_S001] ", cn);
    ds = new DataSet();
    da.Fill(ds, "code");

    list.Add("REEL", "REEL");
    foreach (DataRow row in ds.Tables["code"].Rows)
        list.Add(row["code"].ToString(), row["lib"].ToString());

    return list;

My controller :

public ActionResult rspic002()
   ViewData["Ddl_donnee"]  = model.getDonnee();

   return View();

My view :

List<SelectListItem> listDonnee = new List<SelectListItem>();

foreach (KeyValuePair<string, string> key in ViewData["Ddl_donnee"] as Dictionary<string, string>)
        SelectListItem donnee = new SelectListItem();
        donnee.Value = key.Key;
        donnee.Text = key.Value;

Thank you in advance for your help

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