Get unchecked values from CheckBoxList in c#

Question

I am trying to update the unchecked values from CheckBoxList in button_click. and not able to get the values of CheckBoxList unchecked items.

my code for populate chechboxlist is

 using (SqlConnection conn = new SqlConnection())
    {
        conn.ConnectionString = ConfigurationManager
                .ConnectionStrings["constr"].ConnectionString;
        using (SqlCommand cmd = new SqlCommand())
        {
            cmd.CommandText = "select * from hobbies";
            cmd.Connection = conn;
            conn.Open();
            using (SqlDataReader sdr = cmd.ExecuteReader())
            {
                while (sdr.Read())
                {
                    ListItem item = new ListItem();
                    item.Text = sdr["Hobby"].ToString();
                    item.Value = sdr["HobbyId"].ToString();
                    item.Selected = Convert.ToBoolean(sdr["IsSelected"]);
                    chkHobbies.Items.Add(item);
                }
            }
           conn.Close();
        }
    }

i am using the answer https://stackoverflow.com/a/410505/2376607

but it is for windows forms

please help how to get the unchecked values of CheckBoxList.

try this. http://stackoverflow.com/questions/18924147/how-to-get-values-of-selected-items-in-checkboxlist-with-foreach-in-asp-net-c — Saravana Kumar, Dec 12 '14 at 06:33
@Kumar this is for selected values i want to get Unselected values :( — Gitz, Dec 12 '14 at 06:35
@Gitz What's the big deal in that? Instead of using `item.Selected` just use `!item.Selected`(note the not symbol before item) in the linked answer. — Sriram Sakthivel, Dec 12 '14 at 06:45

Neel · Accepted Answer · 2014-12-12T06:44:39.327

3

You can try below sample of code :-

        string chkboxlistValue = "";
        string uncheckedId = "";
        foreach (ListItem val in chkbxId.Items)
        {
            if (val.Selected)
            {
                chkboxlistValue += val.Value + " ";
            }
            else
            {
                 uncheckedId += val.Value + ",";
            }
        }

edited Dec 12 '14 at 06:44

answered Dec 12 '14 at 06:36

Neel

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1

Once again saying that pleasure is all mine :) – Neel Dec 12 '14 at 06:45

Hitesh · Answer 2 · 2014-12-12T06:45:31.887

1

foreach (ListItem item in chkHobbies.Items)
{
   if (item.Selected == false)
   {
      // your code here
   }
}

edited Dec 12 '14 at 06:45

answered Dec 12 '14 at 06:36

Hitesh

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Get unchecked values from CheckBoxList in c#

2 Answers2