(adsbygoogle = window.adsbygoogle || []).push({}); Hey everyone - I was wondering what is is the easiest way to make a few lists, then depending on the option selected in combobox1, it will populate combobox2.

What I have is 2 comboboxes - Make and Model. I know I can add stuff by typing

    comobobox1.Items.Add("Suzuki");

but doing that for every Make and model is gonna be a ballache. So I was wondering if someone knew of a way I can make some lists eg;-

-Make (Suzuki, Honda, etc)
-Suzuki Models
-Honda Models
-etc

so that I can select Suzuki (eg) in combobox1 and it will populate combobox2 with Suzuki Models

Thats what i tried, but didnt get very far lol. Went on new and chose data and selected the database and then a wizard came up that confused me so i gave up lol

lols, ill try working on this project and see if I can do anything with just at text file.

Lol. Appreciated. As far as i can tell the file.appendalllines thing adds lines to a txt file whereas file.writealllines or writealltext overwrites the whole doc...rendering it useless in this case which is why i thought readalllines to commit the file contents to memory then appendalllines to add then save the file...thats my logic anyways lol

Np

I have this so far and it seems to work as of now, still got to clean and fix it up

    

private void Car_Models()

        {

            string[] cars = carInformation.Vehicles_Models().Split(';';



            for (int i = 0; i < cars.Length; i++)

            {

                string c = cars[i];

              

                

                if (c.Contains(comboBox1.Text))

                {

                    string model = c.Substring(c.IndexOf(',' + 1);

                    comboBox2.Items.Add(model);

                }

            }

        }

    namespace Car_Models

{

    class CarInformation

    {

        public string Vehicles_Models()

        {

            string filePath = AppDomain.CurrentDomain.BaseDirectory + "Models.txt";

            string models= "";

            

            if (File.Exists(filePath))

            {

                using (StreamReader sr = new StreamReader(filePath))

                {

                    models = sr.ReadToEnd();





                }

            }

            return models;

        }

    }

}

Hopefully this is what you were looking for :p
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Textfile has to be formatted like this, but you can change it:
Suzuki,Aerio;
Suzuki,Equator;
Honda,Fit;
Honda,Civic Coupe Si;
Honda,Civic Sedan;

Wow. Thanks for that jagex. Very Helpful

Now i need 2 textboxes (or 1 if you can manage it) so that you can permenantly add say a Honda Jazz in the list

Ok, I will work on it tomorrow

Try doing it yourself.

Add the vehicle you want added to the same list/array that you fetched from the textfile and just write them all to the textfile.

Ok. I will have a go tomorrow. Last hol day today so will have a crack before work. Thanks for your help so far

Ok - I have had a crack at this. For some reason vs didn't like your string[] cars = CarInformation.Vehicles_Models().Split(';'; so I went on a bit of a hunt and have ended up with this;

    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            if (comboBox1.Text == "Suzuki")

            {

                comboBox2.Items.Clear();

                string[] lineOfContents = File.ReadAllLines("Models.txt");

                foreach (var line in lineOfContents)

                {

                    string[] tokens = line.Split(',';

                    comboBox2.Items.Add(tokens[1]);

                }

            }

        }

I have a txt file with makes and models in the same file called "Models.txt" so;

    

Suzuki,gsxr 1000

Suzuki,gsxr 750

Suzuki,gsxr 600

Honda,cbr 600 rr

Honda,cbr 600 f

Honda,cbr 125

(they are bikes) and with the above code, it gives me the list, without the make which is fine, but I need to filter out the unneeded makes and models - so when I select Suzuki in cb1, cb2 will fill with the gsxr range, and if I select Honda in cb1, cb2 will fill with the cbr range.

If we could get that far, I think we will be groovy.

I tried putting an if statement with token[0] == "Suzuki" but it wasn't having it :confused:

Then (as far as adding to the range goes) all I have to do (in my mind) is add a button and 2 texboxes and add the following to the button;

    

file.appendalltext("Models.txt", environment.newline + textbox1.text + "," + textbox2.text)

but I can figure that out later :p

But yeah, any help with the 1st bit would be great