"No value given for one or more required parameters."

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hi

I have a dataGrid that I should insert its columns values to an access database ...

but I have problem with " command.ExecuteNonQuery();"

my project is not finished just for this error ... please help if you can . it's my code :

  for (int i = 0; i < (dataGridFactorRent.Rows.Count) - 1; i++)
            {

 string query = @"INSERT INTO tbl_RentFactor 

([ID],DateNow,customerName,objectName,objectNumber,unitCost,objectCost,paidMoney,restOfMonyy,customerID,DateBack)
 VALUES

("+ID+",'" + lbldate.Text + "','" + cmdCustomName.Text + "'," + dataGridFactorRent.Rows[i].Cells[1].Value + ",
 " + dataGridFactorRent.Rows[i].Cells[3].Value + ",
" + dataGridFactorRent.Rows[i].Cells[4].Value + ",
" + dataGridFactorRent.Rows[i].Cells[5].Value + ",
'" + txtPaid.Text + "','" + lblRemained.Text + "',
"+customerID+",'"+lbldate.Text+"')";

                //try
                //{

                    con.Open();
                      command.CommandText =query;
                    command.ExecuteNonQuery();

                    con.Close();

               //} 
               // catch (Exception ex) { MessageBox.Show("error"); }
            }

Posted 1-Jun-13 19:54pm

sahrarainmelody

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 2-Jun-13 2:21am

Check if all the values are getting properly or not by debugger.
And check the query by debugger before executing, if it is correct or not.

1 solution

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OriginalGriff · Accepted Answer · 2013-06-01T21:11:00

Solution 1

Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead, and your problem will probably disappear at the same time.

Posted 1-Jun-13 21:11pm

OriginalGriff