Listview.count - InvalidArgument=Value of '0' is not valid for 'index

Question

I have a problem with my listview item. hope you can help me with that.

my listview.items.count is not working properly. EventhoughI have 1 data, that suits my sql-string, (I checked it from db) count comes zero and i'm getting "InvalidArgument=Value of '0' is not valid for 'index" error.

I dont know what i'm doing wrong? here's my code;

try
{
     mcon.Open();
     reader = comma.ExecuteReader();
     while (reader.Read())
     {
          int sira = listView1.Items.Count;
          listView1.Items[sira].SubItems.Add(reader.GetString("id"));
          listView1.Items[sira].SubItems.Add(reader.GetString("ad"));
          listView1.Items[sira].SubItems.Add(reader.GetString("soyad"));
          listView1.Items[sira].SubItems.Add(reader.GetString("evrakulastimi"));
          listView1.Items[sira].SubItems.Add(reader.GetString("basvurusonuclandimi"));
     }
}
catch
{                
}

item with index "listView1.Items.Count" never exist, you should either address to "listView1.Items.Count - 1" item or add an item after int sira = listView1.Items.Count; — Dmitrii Bychenko
– Dmitrii Bychenko, Commented Dec 18, 2013 at 12:20

Dmitrii Bychenko · Accepted Answer · 2013-12-18 12:21:47Z

3

Probably, you've forgot to add a new item:

      while (reader.Read())
        {
            int sira = listView1.Items.Count;

            listView1.Items.Add("Put some text here"); // <- Add a new item

            listView1.Items[sira].SubItems.Add(reader.GetString("id"));
            listView1.Items[sira].SubItems.Add(reader.GetString("ad"));
            listView1.Items[sira].SubItems.Add(reader.GetString("soyad"));
            listView1.Items[sira].SubItems.Add(reader.GetString("evrakulastimi"));
            listView1.Items[sira].SubItems.Add(reader.GetString("basvurusonuclandimi"));
        }

answered Dec 18, 2013 at 12:21

Dmitrii Bychenko

188k20 gold badges178 silver badges231 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Victor Mukherjee · Accepted Answer · 2013-12-18 12:20:00Z

3

Count actually gives you what it says, i.e. the count. Since listview.items collection is zero indexed, set int sira = listView1.Items.Count-1;

answered Dec 18, 2013 at 12:20

Victor Mukherjee

11.3k20 gold badges61 silver badges104 bronze badges

1 Comment

Aurora Over a year ago

thank you for your time, but the "add" property solved my problem

Sudhakar Tillapudi · Accepted Answer · 2013-12-18 12:27:07Z

0

Solution : You can Add Items to the Listview without using any Index parameter.

You need to assign first item index to ListViewItem and then add the SubItems .

Try This :

    ListViewItem lvi = listView1.Items.Add(reader.GetString("id"));
    lvi.SubItems.Add(reader.GetString("ad"));
    lvi.SubItems.Add(reader.GetString("soyad"));
    lvi.SubItems.Add(reader.GetString("evrakulastimi"));
    lvi.SubItems.Add(reader.GetString("basvurusonuclandimi"));

answered Dec 18, 2013 at 12:27

Sudhakar Tillapudi

26.3k5 gold badges43 silver badges70 bronze badges

Collectives™ on Stack Overflow

Listview.count - InvalidArgument=Value of '0' is not valid for 'index

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related