Two-Way Databinding with RadGridView

[TSRG - IT]

Hi guys,

I'm using the MVVM pattern and I've got my RadGridView bound to a BindingList of business objects, within the business objects there are various strings and a binding list of decimals. Below is a stripped down version of the set up I have:

public class ARow
{
string column1;
string column2;
BindingList<decimal> values;
}

BindingList<ARow> allRows;

XAML:
<telerik:RadGridView ItemsSource = "{Binding allRows, Mode=TwoWay}">

The columns are manually added and have two way binding set up in the code behind.

I would like to implement two way data binding whereby changes to values in the BindingList<decimal> values will be reflected in the grid itself. I am able to successfully change the underlying data source however this is not reflected in the grid itself.

I have also tried, instead of using "decimal" using a custom class "ValueObject" I created which contains a decimal property as follows, but to no avail. The code is as follows:

public class ValueObject : INotifyPropertyChanged
{
    _private decimal _value;
    public decimal Value
    { 
        get { return _value; } set { _value = value; OnPropertyChanged("Value"); }
    }
}

Any help would be great!

Cheers,

Tim.

[Yavor Georgiev]

Hi Timothy Lin,

 Is there a particular reason why you want to use BindingList, instead of ObservableCollection or our own ObservableItemCollection? Also, you employ a master-detail view, correct? I need to know a bit more about your scenario before I can be of further assistance.

Greetings,
Yavor Georgiev
the Telerik team

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[TSRG - IT]

Hi Yavor Georgiev,

Thank you for your reply, I realised that I had to call the PropertyChanged event handler within the List Changed event handler of the BindingList. The reason I was using a BindingList was because I wanted to capture the events when an item changes, which, the ObservableCollection did not provide! But it's fixed for now!

Cheers,

Tim.

[Kiran]

Hi

I have similar problem I am not able to make the Two-Way binding work.

I have a class

public class TransformedPermission : INotifyPropertyChanged
{
    public long TaskID
    {
        get;
        set;
    }
    public long ParentTaskID
    {
        get;
        set;
    }
    public System.Guid RoleId
    {
        get;
        set;
    }
    public string TaskName
    {
        get;
        set;
    }
    public string TaskTypeDescription
    {
        get;
        set;
    }
    ObservableCollection<bool> permissionValues = new ObservableCollection<bool>();
    public ObservableCollection<bool> PermissionValues
    {
        get { return this.permissionValues; }
    }
    public event PropertyChangedEventHandler PropertyChanged;
}

Then I create an observable collection of this class

private ObservableCollection<TransformedPermission> _transformedPermissionList = new ObservableCollection<TransformedPermission>();

 public ObservableCollection<TransformedPermission> RolePermissionsList
        {
            get { return _transformedPermissionList; }
            set
            {
                _transformedPermissionList = value;
                RaisePropertyChanged("RolePermissionsList");
            }
        }

I use code behind to set the Item Source:

tngGVFrameworkPermissions.ItemsSource = RolePermissionsList;

I want to bind the data using TwoWay binding in XAML

<telerik:RadGridView Name="tngGVFrameworkPermissions" AutoGenerateColumns="False" ItemsSource="{Binding Path=RolePermissionsList, Mode=TwoWay}"/>

If I comment out the code in code behind nothing gets bind.

I am looking for a working solution using MVC pattern can you share a working solution with similar requirement

[Vlad]

Hi,

 You have auto-properties for your object and PropertyChanged is never raised.

Sincerely yours,
Vlad
the Telerik team