How to look if a value typed in a text box exists in a data grid-view?

Question

I have a dataGridView1 and the user can enter info to it, then by clicking a button3 I want the user to search for whatever he types in a textBox3 And to get a MessageBox saying if the string was found or not in the datagridview. My code is

bool exists = false;
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
    if (exists == true)
    {
        break;
    }
    else
    {
        for (int k = 1; k < dataGridView1.Rows[i].Cells.Count; k++)
        {
            if (textBox3.Text == dataGridView1.Rows[i].Cells[k].Value.ToString())
            {
                exists = true;
                break;
            }

        }
    }
}

if (exists == true)
{
    MessageBox.Show("It exists!");
}
else
{
    MessageBox.Show("It doesn't exist!!");
}

Answer 1

Without seeing some actual code its hard to get specific, here's what I would do:

private void button3_Click(object sender, EventArgs e)
{
    string SearchString = textBox3.text;
    try
    {
        foreach (DataGridViewRow row in dataGridView1.Rows)
        {
            if (row.Cells[SearchColumn.SelectedIndex].Value.ToString().Equals(SearchString))
            {
                MessageBox.Show("Match Found");
                //This will only pick up the first match not multiple…
            }
            else
            {
                MessageBox.Show("No Match");
            }
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

Completely untested, essentially you want to be doing the following:

• Search through each row of your grid
• convert the value to string (error catch here)
• compare the row value to your string (from textbox3)

Have fun.