CODEWITHSUNDEEP
wpfbinding
wpfbeginner111
wpfbeginner111

Reputation:

Nested Collection Binding

I want to bind nested collection to grid panel but not sure how dynamically I can do this.

Here is my collection:

Public class GrandParent
{
    string name;
    Icollection<Parent> ParentCollection;
}

Public class Parent
{
    string lastname;
    Icollection<Child> ChildCollection;
}

Public class Child
{
    string name;
    int age;
}

I want output like this:

GrandParent.Name Parent1.LastName Parent2.LastName Parent3.LastName

GP1 Children[GP1,Parent1.LastName] Children[GP1,Parent2.LastName] Children[GP1,Parent3.LastName]
GP2 Children[GP2,Parent1.LastName] Children[GP2,Parent2.LastName] Children[GP2,Parent3.LastName]

Where Parent.LastNames are static.

As of now, my viewmodel class (binding class) is like this:

Class viewmodel
{
    collection<string> GrandParentNames
    {
    }

    collection<string> Parent1LastNames
    {
    }

    collection<string> Parent2LastNames
    {
    }

    collection<string> Parent3LastName
    {
    }
}

Could anyone please suggest me better approach with this?

Upvotes: 0

Views: 707

Answers (3)

Narcolapser
Narcolapser

Reputation: 6221

I'm just going to make the assumption based of your name that your are doing this in wpf.

In your code, you had the right idea for the Model, but (assuming i understand what your aiming for) you went a little astray on the ViewModel. Because the GrandParent class has a collection of Parents, and the Parents a collection of Children, in your ViewModel you'll only need a collection of GrandParrents in your ViewModel. so your ViewModel will be closer to:

class ViewModel
    {
        ICollection<GrandParent> Grents;
    }

as goes your View, the easiest way I know of is through data templates. You'll have to use a list box in your grid, but you can format the list box how ever you want to get the result your looking for, this is the glory of WPF. anyway, i made a simple example here:

<Window.Resources>

 <local:ViewModel x:Key="ViewModelDataSource" d:IsDataSource="True"/>
 <DataTemplate x:Key="GrandParents_Data_Template">
  <StackPanel>
<TextBlock Text="{Binding name}"/>
<ListBox ItemsSource="{Binding ParentCollection}" ItemTemplate="{DynamicResource Parents_Data_Template}"/>


</Window.Resources>

Hope that helps get you going in the right direction at least. Let me know if you have any more questions.

Upvotes: 0

wpfbeginner111
wpfbeginner111

Reputation:

Hey Charlie, looks like I didn't put the my question well.... Sorry for the same..

My collections are nested but my output I want is not nested..

it should be like...

Parent Property I want to use for header name GranParent Name I want o use for First Column while Child properties I want to use for Other Columns

So Input is Grant Parent -> Parent -> Child (1 to many)

out put is 

             --         Parent        --               Parent1

GrandParent.Name -- Child of Parent -- Child of Parent1 GrandParent1.Name -- Child of Parent -- Child of Parent1

IF I take an example here...

Country -> Designation -> Person (Name, Age)

e.g. US - Manager - Person(A, 26) US - Chief ARchitect - Person (B, 28) UK - Manager - Person(C, 26) UK - Chief Architect - Person (D, 28)

**out put is :**

(Header)

Country --- Mangaer --- Chief Architect

(R0w1)

US --- A, 26 --- B, 28

(R0w2)

UK --- C,26 --- D, 28

would apprecitate for any of clue or code...

Upvotes: 0

Charlie
Charlie

Reputation: 15227

Your question is a little vague; I don't understand exactly what you are trying to bind to... What do you mean by:

bind nested collection to grid panel

I can tell you right away though, that when using nested collections of data, your best bet is always going to be using a HierarchicalDataTemplate. Here are a couple examples of using one.

Upvotes: 1

Related Questions