Question

I’m filling a ComboBox with DataGridView cells’ values. Now, I don’t want to repeat values which already are in the ComboBox.

So, there is for example:

• Bill Gates
• Steave Jobs
• Steave Ballmer
• Steave Jobs

I want to remove all values which appear more than once.

This is my code:

private void btnFilter_Click(object sender, EventArgs e)
{
    ArrayList SellerNameList = new ArrayList();

    for (int i = 0; i < dataGridView1.Rows.Count; i++)
    {
        SellerNameList.Add(dataGridView1.Rows[i].Cells["cSellerName"].Value);
    }
    comboBox1.DataSource = SellerNameList;
}

Sorry for my bad English.

Answer 1

Seems like you want a unique list for the dataSource for your ComboBox. If you are using .NET 3 and above you can use:

List<T> withDupes = SellerNameList;
List<T> noDupes = withDupes.Distinct().ToList();

comboBox1.DataSource = noDupes;