How can I insert my sortedlist into a listbox?

Jjjsutton.

11/18/2023

I am new to C# and currently using a sortedlist<string, int> in order to store values that I need to display in a listbox (according to my uni, this is how I need to do it). I have tried quite a few things however I am struggling to get both the key AND value into a listbox. Would anybody be able to give me some guidance on how I can go about doing this?

TTheRanger

11/18/2023

listbox in winforms? wpf? web site?

Jjjsutton.

11/18/2023

Apologies, it is in winforms

TTheRanger

11/18/2023

try

yourlistBox.DataSource = yourSortedList;
yourlistBox.DataTextField = "Value";
yourlistBox.DataValueField = "Key";
yourlistBox.DataBind();

yourlistBox.DataSource = yourSortedList;
yourlistBox.DataTextField = "Value";
yourlistBox.DataValueField = "Key";
yourlistBox.DataBind();

yourlistBox.DataSource = new BindingSource(yourSortedList, null); 
yourlistBox.ValueMember = "Key";
yourlistBox.DisplayMember = "Value";

yourlistBox.DataSource = new BindingSource(yourSortedList, null); 
yourlistBox.ValueMember = "Key";
yourlistBox.DisplayMember = "Value";

Jjjsutton.

11/18/2023

First one does not contain definitions for all but DataSource Second one does show my value but not the key

TTheRanger

11/18/2023

ah lol just noticed its swapped, just swap it make it show the key instead

Jjjsutton.

11/18/2023

lol, now the key is showing but the value is not

TTheRanger

11/18/2023

that is the point you want to display both at the same time?

Jjjsutton.

11/18/2023

Correct Ive been able to show one at a time, however been struggling to make it show both

TTheRanger

11/18/2023

unsure, try removing these lines

yourlistBox.ValueMember = "Key";
yourlistBox.DisplayMember = "Value";

yourlistBox.ValueMember = "Key";
yourlistBox.DisplayMember = "Value";

Jjjsutton.

11/18/2023

Displays the value

TTheRanger

11/18/2023

hmm, i recall DataSource can accept a list directly

Jjjsutton.

11/18/2023

How I originally have been doing it is through .ToList, however that only displays the value lsbScores.DataSource = scores.ToList();

TTheRanger

11/18/2023

yourlistBox.DataSource = yourSortedList.Select(x => new KeyValuePair<string,int>($"{x.Key} {x.Value}", x.Value));
yourlistBox.ValueMember = "Value";
yourlistBox.DisplayMember = "Key";

yourlistBox.DataSource = yourSortedList.Select(x => new KeyValuePair<string,int>($"{x.Key} {x.Value}", x.Value));
yourlistBox.ValueMember = "Value";
yourlistBox.DisplayMember = "Key";

Jjjsutton.

11/18/2023

TTheRanger

11/18/2023

ok put .ToList() at the end yourlistBox.DataSource = yourSortedList.Select(x => new KeyValuePair<string,int>($"{x.Key} {x.Value}", x.Value)).ToList();

Jjjsutton.

11/18/2023

This works, thank you so much for that... Ill take some time to understand why it works as well. If I have any questions ill message you if you dont mind?

TTheRanger

11/18/2023

well thats simple, KeyValuePair has 2 columns, Key and Value DisplayMember selects which Column to display for the user

Jjjsutton.

11/18/2023

Right, but its set to key, so why does it display both the value and key?

TTheRanger

11/18/2023

it does not the value is actually concatenated in the key by this line yourSortedList.Select(x => new KeyValuePair<string,int>($"{x.Key} {x.Value}", x.Value));

Jjjsutton.

11/18/2023

that line is setting x to be key:value correct?

TTheRanger

11/18/2023

you see, SortedList<string,int> is actually a collection of KeyValuePair<string,int>

Jjjsutton.

11/18/2023

Im not suuuper familiar with lambdas yet, so trying to understand that line specifically lol

TTheRanger

11/18/2023

say u have a key called Foo with a value of 1

Jjjsutton.

11/18/2023

This I understand

TTheRanger

11/18/2023

all i did was converting the key to Foo 1

Jjjsutton.

11/18/2023

Yeah, im understanding that

TTheRanger

11/18/2023

so now the Key of this element is Foo 1 instead of Foo

Jjjsutton.

11/18/2023

it hasnt changed my actual key to foo 1 though right? lol

TTheRanger

11/18/2023

in the sorted list itself? no

Jjjsutton.

11/18/2023

ok cool Ah I see, ur initializing a new keyvaluepair and setting that to be my sortedlists key+value in the key right?

TTheRanger

11/18/2023

yes

Jjjsutton.

11/18/2023

coool im understanding then thanks so much I appreciate it