Merge DataGridView binded Bindinglist and freshly retrieved Bindinglist with updates

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I have tasks bindinglist binded to DataGridView. which I currently refresh from server using

public static bool ReadTasks(ref SortableBindingList<ClientTask> tasks, ref RestClient rClient, out IRestResponse rResponse)
{
    JsonDeserializer rJSONDeserializer = new RestSharp.Deserializers.JsonDeserializer();
    if (ReadObject(ref rClient, "tasks", "", out rResponse))
    {
        tasks = rJSONDeserializer.Deserialize<SortableBindingList<ClientTask>>(rResponse);
        return true;         
    }
    else
    {
        return false;
    }
}

This causes the original tasks to be overwritten thus losing its binding. So I tried the following

if (tasks == null) tasks = new SortableBindingList<ClientTask>();
tasks.Clear();
foreach (ClientTask item in JSONDeserilizer.Deserialize<SortableBindingList<ClientTask>>(rResponse))
{
    tasks.Add(item);  
}  

This updates my grid properly but I lose the user selection. So is there anyway I can merge the new and old tasks. By merge I mean the deserialized one should overwrite differences on old tasks list but maintain the binding/Sort order etc. The deserialized list can contain new tasks,updated tasks or might have some tasks deleted.

the Task Class is as follows

public class ClientTask : Task
{
    public string taskName
    {
        get { return this.name + " - " + this.title; }
    }
    public string DeveloperName
    {
        get { return Globals.People.Find(x => x.id == this.developer_id).name; }
    }
    public string ReviewerName
    {
        get { return Globals.People.Find(x => x.id == this.reviewer_id).name; }
    }
}

public class Task 
{
    public Task()
    {
        open_date = DateTime.Now.AddDays(0*7);
        analysis_date = DateTime.Now.AddDays(1*7);
        review_date = DateTime.Now.AddDays(1*7);
        correction_date = DateTime.Now.AddDays(1*7);
        promotion_date = DateTime.Now.AddDays(1*7);
        collection_date = DateTime.Now.AddDays(2*7);
        closed_date = DateTime.Now.AddDays(3*7);
        developer_id = Globals.People.First().id;
        reviewer_id = Globals.People.First().id;
    }
    public int id { get; set; }
    public int developer_id { get; set; }
    public int reviewer_id { get; set; }
    public string name { get; set; }
    public eTaskStatus task_status { get; set; }
    public eBugType bug_type { get; set; }
    public string title { get; set; }
    public string internal_object_id { get; set; }
    public bool approved { get; set; }
    public bool is_bug { get; set; }
    public string description { get; set; }
    public string analysis { get; set; }
    public string review { get; set; }
    public int comments_count { get; set; }
    public int documents_count { get; set; }
    public DateTime open_date { get; set; }
    public DateTime analysis_date { get; set; }
    public DateTime review_date { get; set; }
    public DateTime correction_date { get; set; }
    public DateTime promotion_date { get; set; }
    public DateTime collection_date { get; set; }
    public DateTime closed_date { get; set; }
    public DateTime target_date { get; set; }
    public DateTime created_at { get; set; }
    public DateTime updated_at { get; set; }
    public List<Document> documents { get; set; }
}

When retrieving the tasks list from the server only following attributes are retrieved :id,:name,:task_status,:is_bug,:title,:bug_type,:target_date,:created_at,:updated_at,:approved,:developer_id

I also found this Reconciling a new BindingList into a master BindingList using LINQ but it went over my head.

More Info:

SortableBindingList

RestSharp Deserialization

asked 25 secs ago

AEonAX

106

Merge DataGridView binded Bindinglist and freshly retrieved Bindinglist with updates