error input string is not correct format on line:int nActualQty = Convert.ToInt32(textBox5.Text.ToString());

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5.00/5 (1 vote)

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C#

private void textBox5_TextChanged(object sender, EventArgs e)
{
    objConn1.Open();
    int nQty = 0;
    int nActualQty = Convert.ToInt32(textBox5.Text.ToString());
    string sql3 = "select qty from dbo.RateMouldQuantity where ratechart= '" + comboBox5.SelectedValue.ToString() + "'";
    SqlCommand com = new SqlCommand(sql3, objConn1);
    SqlDataReader objQty = com.ExecuteReader();
    if (objQty.Read())
    {
        nQty = Convert.ToInt32(objQty["Qty"]);
    }
    if (nQty < nActualQty)
    {
        MessageBox.Show("Qty is greater");
    }
    objConn1.Close();
}

Posted 18-Nov-12 23:27pm

Master Vinu

Updated 18-Nov-12 23:33pm

Andy411

v3

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OriginalGriff · Accepted Answer · 2012-11-18T23:33:00

Solution 1

What it means is that the string in the TextBox is not a valid integer - it may contain a decimal point, or an alphabetic character.

Try using TryParse instead:

C#

int nActualQty;
if (!int.TryParse(textBox5.Text, out nActualQty))
   {
   // Report problem to user - he typed wrong.
   ...
   }

BTW: You do not have to call ToString on Text values - they are strings already so it does nothing useful at all...

Posted 18-Nov-12 23:33pm

OriginalGriff

Comments

Master Vinu 19-Nov-12 6:00am

thx OriginalGriff

OriginalGriff 19-Nov-12 6:08am

You're welcome!

sariqkhan 20-Nov-12 4:41am

+5