How to bind List within the list?

[Pratik]

I have two List : 1)  ListPolicies, (Outer list, parent list)

                           2) ListBrokers (inner list, child list)

 

Class DataBind
{
public list <Policy> PolicyList {get;set;}
}

class Policy
{
public PolicyNumber {get;set;}
public PolicyName {get;set;}
public List<Broker> {get;set;}
}

class Broker
{
public Name {get;set;}
public Address {get;set;}
}​

 

bind data to parent list

ListPolicies.DataSource = defaultReportViewModel.PlanProvider.PolicyList;​

 Now i want to bind data childlist, how to achieve this thing???

 

[Nasko]

Hello Patrik,

When there is another business object property within your business object we do not drill down into the hierarchy. To use the inner object you have to bind a Data Item to it using expressions and Bindings. For more detailed information, please follow the Use DataObject as data source for nested data items (Table, List, Crosstab, Graph) section of the How to use ReportItem.DataObject property in expressions  article. This way you can bind the DataSource property of a data item to a given object/collection property from your business object and the data item will display the inner items.
In case you have multiple levels of nested objects, you will also need to data items in multiple levels in the report.
When you add a binding for the DataSource property of a nested data item (List, Table, Report), the data fields will not be available during design-time and you will need to write them down manually based on your business object structure.

In your particular scenario you can add the following binding to the broker list's DataSource property:

Property path: DataSource
Expression: = ReportItem.DataObject.Brokers

where the Brokers property contains a list of Broker objects:

class Policy
{
    public string PolicyNumber { get; set; }
    public string PolicyName { get; set; }
    public List<Broker> Brokers { get; set; }
}

Regards,
Nasko
Telerik

[Jonathan]

Current link: https://docs.telerik.com/reporting/data-items-how-to-use-data-object

[Silviya]

Hello Jonathan,

Thank you, the article's link has been updated. 
Also, it might help checking How to Databind to Collection Properties KB article also.

Best Regards,
Silviya
Progress Telerik