C#•14mo ago

❔ dictionary as datasource

if i do ...DataSource = dic.Values it works but it don't keep it updated when i add/remove value from the dictionary

19 Replies

Jimmacle•14mo ago

well, what does dic.Values give you?

LividOP•14mo ago

the values

Jimmacle•14mo ago

i mean what type does it give you because it's not the same object as the dictionary

LividOP•14mo ago

dic.Values does what i want but it don't keep updated

Jimmacle•14mo ago

...so it doesn't do what you want and i'm trying to help you learn why

LividOP•14mo ago

....

        Artikel artikel1 = new Artikel()
        {
            itemId = 1000000,
            itemName = "article naam"
        };
        _artikelsList.Add(artikel1.itemId, artikel1);
        grid.DataSource = _artikelsList.Values;
        Artikel artikel2 = new Artikel()
        {
            itemId = 2000000,
            itemName = "article naam"
        };
        _artikelsList.Add(artikel2.itemId, artikel2);

        Artikel artikel1 = new Artikel()
        {
            itemId = 1000000,
            itemName = "article naam"
        };
        _artikelsList.Add(artikel1.itemId, artikel1);
        grid.DataSource = _artikelsList.Values;
        Artikel artikel2 = new Artikel()
        {
            itemId = 2000000,
            itemName = "article naam"
        };
        _artikelsList.Add(artikel2.itemId, artikel2);

value with key 200000 doesn't get added

Jimmacle•14mo ago

so what is the answer to my original question?

LividOP•14mo ago

artikel

Jimmacle•14mo ago

try again

LividOP•14mo ago

IDictionary<int, Artikel> _artikelsList = new Dictionary<int, Artikel>();

Jimmacle•14mo ago

that is not what _artikelsList.Values gives you

LividOP•14mo ago

collection ?

Jimmacle•14mo ago

valuecollection but close enough winforms probably doesn't know how to understand when that is updated

LividOP•14mo ago

so should i use a dictionary?

Jimmacle•14mo ago

if you look at the docs it explains what kinds of objects are supported for data binding https://learn.microsoft.com/en-us/dotnet/desktop/winforms/data/overview?view=netdesktop-7.0

Overview of Data Binding and Windows Forms - Windows Forms .NET

Learn about interfaces related to Data Binding, data sources supported by Windows Forms, and types of Data Binding.

LividOP•14mo ago

bananas i want to insert list of article into another but i don't want duplicate value with id property article has a property id

Accord•14mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

LividOP•14mo ago

Accord•14mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ dictionary as datasource