C#•2mo ago

Insert into Access Database

Hey all, I've been trying to Insert into my access database for some days now and I'm still getting a syntax error which I have no idea why, my connection works I was able to delete buy I cannot add for some reason

14 Replies

❤RieBi&❤•2mo ago

$details

MODiX•2mo ago

When you ask a question, make sure you include as much detail as possible. Such as code, the issue you are facing, what you expect the result to be, what .NET version you are using and what platform/environment (if any) are relevant to your question. Upload code here https://paste.mod.gg/, save, and copy the link into chat for others to see your shared code! (see $code for more information on how to paste your code)

❤RieBi&❤•2mo ago

Also, don't use Access for database

jcotton42•2mo ago

@Mike B how do you expect us to diagnose your syntax error without the code in question?

Mike BOP•2mo ago

how do i format the code

jcotton42•2mo ago

$code

MODiX•2mo ago

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat For longer snippets, use: https://paste.mod.gg/

jcotton42•2mo ago

But sql instead of cs (If it’s just the sql statement)

Mike BOP•2mo ago

internal void AddCar(Car car)
{
    OleDbConnection connection = new OleDbConnection(strConnection);


    try
    {
        connection.Open();
        Console.WriteLine(car.ToString());

        // Use a parameterized query to prevent SQL injection and handle special characters.
        string query = "INSERT into Cars(VIN, Make, Model, CarYear, Mileage, RentalCost, Description, Location, Availability, Class, Image) " +
                            $"VALUES ({car.VehicleID}, '{car.Make}', '{car.Model}', {car.Year}, {car.Mileage}, {car.RentalCost}, '{car.Description}', '{car.Location}', '{car.Availability}', '{car.Classification}', '{car.Image}')";
        Console.WriteLine(query);

        OleDbCommand command = new OleDbCommand(query, connection);
        
        command.ExecuteNonQuery();
 
    }
    catch (Exception ex)
    {
        MessageBox.Show("Addcar exception: "+ ex.Message);
    }
    finally
    {
        
Console.WriteLine("connection closing");
        connection.Close();
    }
}

internal void AddCar(Car car)
{
    OleDbConnection connection = new OleDbConnection(strConnection);


    try
    {
        connection.Open();
        Console.WriteLine(car.ToString());

        // Use a parameterized query to prevent SQL injection and handle special characters.
        string query = "INSERT into Cars(VIN, Make, Model, CarYear, Mileage, RentalCost, Description, Location, Availability, Class, Image) " +
                            $"VALUES ({car.VehicleID}, '{car.Make}', '{car.Model}', {car.Year}, {car.Mileage}, {car.RentalCost}, '{car.Description}', '{car.Location}', '{car.Availability}', '{car.Classification}', '{car.Image}')";
        Console.WriteLine(query);

        OleDbCommand command = new OleDbCommand(query, connection);
        
        command.ExecuteNonQuery();
 
    }
    catch (Exception ex)
    {
        MessageBox.Show("Addcar exception: "+ ex.Message);
    }
    finally
    {
        
Console.WriteLine("connection closing");
        connection.Close();
    }
}

this is the info i got from my form and the generated inserts statement 1234, 'Porsche', '911', 2024, 23, 89.99, 'Fast', 'Lot B', 'Available', 'Sport', 'porsche.png' INSERT into Cars(VIN, Make, Model, CarYear, Mileage, RentalCost, Description, Location, Availability, Class, Image) VALUES (1234, 'Porsche', '911', 2024, 23, 89.99, 'Fast', 'Lot B', 'Available', 'Sport', 'porsche.png') Exception thrown: 'System.Data.OleDb.OleDbException' in System.Data.dll

jcotton42•2mo ago

First, you need to switch to parameterized queries. String interpolation in SQL is dangerous, it’s how you get SQL injection. Parameterized queries also free you from dealing with headaches around escaping.

Mike BOP•2mo ago

One sec let me update the code, I tried it and still have gotten issues

string query = "INSERT INTO Cars (VIN, Make, Model, CarYear, Mileage, RentalCost, Description, Location, Availability, Class, Image) " +
       "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";


OleDbCommand cmd = new OleDbCommand(query, connection);
cmd.Parameters.AddWithValue("?", car.VehicleID);
cmd.Parameters.AddWithValue("?", car.Make);
cmd.Parameters.AddWithValue("?", car.Model);
cmd.Parameters.AddWithValue("?", car.Year);
cmd.Parameters.AddWithValue("?", car.Mileage);
cmd.Parameters.AddWithValue("?", car.RentalCost);
cmd.Parameters.AddWithValue("?", car.Description);
cmd.Parameters.AddWithValue("?", car.Location);
cmd.Parameters.AddWithValue("?", car.Availability);
cmd.Parameters.AddWithValue("?", car.Classification);
cmd.Parameters.AddWithValue("?", car.Image);
OleDbCommand command = new OleDbCommand(query, connection);

command.ExecuteNonQuery();
MessageBox.Show("Car successfully added!");

string query = "INSERT INTO Cars (VIN, Make, Model, CarYear, Mileage, RentalCost, Description, Location, Availability, Class, Image) " +
       "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";


OleDbCommand cmd = new OleDbCommand(query, connection);
cmd.Parameters.AddWithValue("?", car.VehicleID);
cmd.Parameters.AddWithValue("?", car.Make);
cmd.Parameters.AddWithValue("?", car.Model);
cmd.Parameters.AddWithValue("?", car.Year);
cmd.Parameters.AddWithValue("?", car.Mileage);
cmd.Parameters.AddWithValue("?", car.RentalCost);
cmd.Parameters.AddWithValue("?", car.Description);
cmd.Parameters.AddWithValue("?", car.Location);
cmd.Parameters.AddWithValue("?", car.Availability);
cmd.Parameters.AddWithValue("?", car.Classification);
cmd.Parameters.AddWithValue("?", car.Image);
OleDbCommand command = new OleDbCommand(query, connection);

command.ExecuteNonQuery();
MessageBox.Show("Car successfully added!");

updated and I still recieved the same error

Mike BOP•2mo ago

Mike BOP•2mo ago

this is my table

 public Car(int vehicleID, string make, string model, int year, int mileage, decimal rentalCost, string description, string location, string availablility, string classification, string image)
 {
     this.vehicleID = vehicleID;
     this.make = make;
     this.model = model;
     this.year = year;
     this.mileage = mileage;
     this.rentalCost = rentalCost;
     this.description = description;
     this.location = location;
     this.availablility = availablility;
     this.classification = classification;
     this.image = image;
 }

 public Car(int vehicleID, string make, string model, int year, int mileage, decimal rentalCost, string description, string location, string availablility, string classification, string image)
 {
     this.vehicleID = vehicleID;
     this.make = make;
     this.model = model;
     this.year = year;
     this.mileage = mileage;
     this.rentalCost = rentalCost;
     this.description = description;
     this.location = location;
     this.availablility = availablility;
     this.classification = classification;
     this.image = image;
 }

this is my car class

jcotton42•2mo ago

I believe you need unique names for the parameters when you Add. Or use the single-arg variant, if one exists. If you continue having trouble, I would suggest switching to #database

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Insert into Access Database