problems with an account exercise
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;
namespace bankcontact
{
///
/// Summary description for Form1.
///
public class Form1 : System.Windows.Forms.Form
{
public OleDbConnection DB=new OleDbConnection("Provider=Microsoft.Jet.OleDB.4.0;Data Source=" + Application.StartupPath + "/Winkel.mdb");
==>
private void cmdKlik_Click(object sender, System.EventArgs e)
{
string Naampje=cmbNaam.Text;
string Codetje=txtCode.Text;
ArrayList Naam=new ArrayList();
ArrayList Code=new ArrayList();
DB.Open();
OleDbCommand rsNaam=new OleDbCommand("SELECT Naam FROM tblGebruiker ORDER BY GebruikerId",DB);
OleDbDataReader rdNaam = rsNaam.ExecuteReader();
while(rdNaam.Read())
{
Naam.Add(rdNaam.GetString(0)); }
rdNaam.Close();
DB.Close();
DB.Open();
OleDbCommand rsCode=new OleDbCommand("SELECT Code FROM tblGebruiker ORDER BY GebruikerId",DB);
OleDbDataReader rdCode = rsCode.ExecuteReader();
while(rdNaam.Read())
{
Code.Add(rdCode.GetString(0));
}
rdCode.Close();
DB.Close();
foreach (object o in Naam)
{
if (o.ToString().ToLower()==Naampje.ToLower())
{
foreach (object a in Code)
{
if (a.ToString().ToLower()==Codetje.ToLower())
{
MessageBox.Show("Test");
}
}
}
}
}
private void Form1_Load(object sender, System.EventArgs e)
{
DB.Open();
OleDbDataAdapter daNaam=new OleDbDataAdapter("Select GebruikerId,Naam from tblGebruiker",DB);
DataSet dsNaam=new DataSet();
daNaam.TableMappings.Add("Table","Gebruiker");
daNaam.Fill(dsNaam);
DataColumn colNaam=dsNaam.Tables["Gebruiker"].Columns["GebruikerId"];
cmbNaam.DisplayMember="Gebruiker.Naam";
cmbNaam.ValueMember="Gebruiker.GebruikerId";
cmbNaam.DataSource=dsNaam;
}
}
the meaning of the programm is that when you insert the right name and code into the 2 tekstboxes you'll be able to withdraw money from you account. you can only withdraw 1000€ per day. you have to type the amount of money that you want to withdraw in a third tekstbox. when the money is taken, there wil come a tekstbox with the money that is left on you account. (startmoney is 1000€, this is put into the database.)
this is the code for the control of the code and the usersname. but when i run the program there is a break on: OleDbCommand rsNaam=new OleDbCommand("SELECT Naam FROM tblGebruiker ORDER BY GebruikerId",DB);
i really dont know the solution. can anybody help me???
thx
jaac79Posted Mar 22, 2004, 1:33 AM