I am trying to update data/a record on an Access 2010 Database through C# using an OledB connection and trying to make an application that is able to insert, update, delete data with the database. So far I can insert into the database okay and use a ComboBox to select a record but as of yet isn't updating.
It comes up with the following error:
An unhandled exception of type 'System.Data.OleDb.OleDbException'
occurred in ClassLibrary2.dll
Additional information: Syntax error in UPDATE statement.
Note: I have tried using squared brackets but didnt change much and came up with a fatal error instead
Here is the code:
using System;
using System.Collections.Generic;
using System.Data.OleDb;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ClassLibrary;
using System.Data;
namespace ClassLibrary2
{
public class Class1
{
OleDbConnection connection;
OleDbCommand command;
private void ConnectTo()
{
connection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=F:\CMS\CustomerDatabase.accdb;Persist Security Info=False");
command = connection.CreateCommand();
}
public Class1()
{
ConnectTo();
}
public void Insert(Customer p)
{
try
{
command.CommandText = "INSERT INTO CustomerData ([Forename], [Surname], [Email Address], [Home Phone Number], [Mobile Phone Number], [Address], [AreaTown], [County], [Postcode]) VALUES('" + p.Forename1 + "', '" + p.Surname1 + "', '" + p.EAddress1 + "', '" + p.HomePhone1 + "' , '" + p.MobNum1 + "' , '" + p.Address1 + "', '" + p.AreaTown1 + "', '" + p.County1 + "', '" + p.Postcode1 + "')";
command.CommandType = CommandType.Text;
connection.Open();
command.ExecuteNonQuery();
}
catch (Exception)
{
throw;
}
finally
{
if (connection != null)
{
connection.Close();
}
}
}
public List<Customer> FillComboBox()
{
List<Customer> CustomersList = new List<Customer>();
try
{
command.CommandText = "SELECT * FROM CustomerData";
command.CommandType = CommandType.Text;
connection.Open();
OleDbDataReader reader = command.ExecuteReader();
while (reader.Read())
{
Customer p = new Customer();
p.Id = Convert.ToInt32(reader["ID"].ToString());
p.Forename1 = reader["Forename"].ToString();
p.Surname1 = reader["Surname"].ToString();
p.EAddress1 = reader["Email Address"].ToString();
p.HomePhone1 = reader["Home Phone Number"].ToString();
p.MobNum1 = reader["Mobile Phone Number"].ToString();
p.Address1 = reader["Address"].ToString();
p.AreaTown1 = reader["AreaTown"].ToString();
p.County1 = reader["County"].ToString();
p.Postcode1 = reader["Postcode"].ToString();
CustomersList.Add(p);
}
return CustomersList;
}
catch (Exception)
{
throw;
}
finally
{
if (connection != null)
{
connection.Close();
}
}
}
public void Update(Customer oldCustomer, Customer newCustomer)
{
try
{
command.CommandText = "UPDATE CustomerData SET Forename= '" + newCustomer.Forename1 + "', Surname= '" + newCustomer.Surname1 + "', Email Address= '" + newCustomer.EAddress1 + "', Home Phone Number= '" + newCustomer.HomePhone1 + "', Mobile Phone Number= '" + newCustomer.MobNum1 + "', Address= '" + newCustomer.Address1 + "', AreaTown= '" + newCustomer.AreaTown1 + "', County= '" + newCustomer.County1 + "', Postcode= '" + newCustomer.Postcode1 + "' WHERE ID= ' + oldCustomer.Id'";
command.CommandType = CommandType.Text;
connection.Open();
command.ExecuteNonQuery();
}
catch (Exception)
{
throw;
}
finally
{
if (connection != null)
{
connection.Close();
}
}
}
}
}
Sorry if the code is a bit long
I've only just started using C# so may need a bit more explaining
Don't mind giving any further details so feel free to ask