Select last row of column in table and show in textbox

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my windows form (form1) has textbox control (textbox1) , combobox control (combobox1) which all contain items (table1 - table2 - table3) and the sql database name (database1) and it has a tables (table1 - table2 - table3)which are identical each contains columns (itemcode - itemname - itemprice)

i want to show the last row of column(itemcode) according to table name i will choose from combobox1

how to do that in code and in which event of the controls please

Posted 16-Oct-15 5:44am

Ahmed Zoeil

Updated 16-Oct-15 6:02am

v2

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Maciej Los 16-Oct-15 12:36pm

What have you triedtill now? Where are you stuck?

Ahmed Zoeil 16-Oct-15 12:52pm

I still can't figure yet how to do it

Ahmed Zoeil 16-Oct-15 13:35pm

I really need your help

Maciej Los 16-Oct-15 15:10pm

"i want to show the last row of itemcode" - can you elaborate what you mean?

ChrisCreateBoss 16-Oct-15 20:37pm

With table are you refering to a DataGridView control or a DataTable?

sreeyush sudhakaran 18-Oct-15 7:06am

I hope this is done for identifying Which is the Last ItemCode Used in Each table and you want it to display in a text box by switching table name in Combobox Am I correct?

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sreeyush sudhakaran · Answer 1 · 2015-10-18T01:33:00

Please try some thing like this

C#

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    Control[] ctrl = this.Controls.Find(comboBox1.SelectedItem.ToString(),true);

    if (ctrl.Length > 0)
    {
         DataGridView dgv = (DataGridView)ctrl[0];

         textBox1.Text = dgv.Rows[dgv.Rows.Count - 1].Cells[0].Value.ToString();
    }
        
}

prasant kumar panda · Answer 2 · 2015-10-20T16:51:00

Solution 2

select top 1 from "+dropdownlist1.selecteditem.text+" order by itemcode desc

Posted 20-Oct-15 16:51pm

prasant kumar panda