(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

Yeah. I ended up using the addrange function. Still a pain but not as much as the add function lol

Whilst im at it...is there a way to add to the range permenantly?
For example if i missed a suzuki gsxr1000 and didnt realise, could i have make/model textboxes and a button to add it to the range and for it to actually stay there forever?

Ah.That makes sense. I think I have seen that in various rtm tools. How could I do this? Im assuming it exports to a text file?

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

If im understanding that correctly You can use a Lambda expression alongside a list.

Example:

List<string> Models = new List<String>();

Models.Where(x => x.Contains(combobox1.SelectedText);

So like this:

    

 List<string> vehicle = new List<string>

            {

                "Ford",

                "Honda",

                "Chrysler"

            };



            var vName = vehicle.Where(v => v.Contains(comboBox1.Text));

           

            foreach(var v in vName)

            {

                comboBox2.Items.Add(v);

            }

A quick an easy way would be to put all the models in a textfile. You can have it formatted like this"

Honda, (Model)
Suzuki, (Model)
Suzuki, (Model)
Chrysler, (Model)

add all the files to a list
create another list equaling to the lambda expression
then run a for/foreach loop to add all the models from the list to the combo box

If you don't want the vehicle name you can do something like .indexOf(',', + 1); That would add only the letters after the comma.

Looks like you already solved it though!

Thanks guys. I will have a play once i get home (on hols atm) in a few days.

I am not familiar with lamda expressions...would it be possible to link a txt file to the model combobox(create many txt files - suzuki models.txt, honda models.txt etc)...or is that what the lamda expression does?

Or...Could i put all models in 1 txt file seperated somehow? I got too many things to think about now haha

Just put them all in one text file in this format and add it to a list

"CarName","Model"
"CarName","Model"
"CarName","Model"
"CarName","Model"
"CarName","Model"

Not sure why i cant edit my post...but hey ho. So after a quick search (admittedly i should have done that 1st) could i put;

Models.Items.AddRange(File.ReadAllLines(models.txt))

And add them to a txt file by using;

File.AppendAllLines(File, new string[] { TextBox.Text }); }

Something like this?