Question

I have one class which contains two more classes like hierarchy. When I’m displaying in Telerik RadGrid it should display like, when we click on first class row then it should display two rows of related classes as in below figure. Could help me to do this..?

Answer 1

As I answered your previous post, I just took my other answer and modified it to do what you are looking for. The following is the addition of a class that stores hobby info. I then added the needed structure and relations (the different colored squares denote the different classes):

Note: The changes here are minimal and the changes are commented as //New something// so they should be easy to see.

protected void Page_Load(object sender, EventArgs e)
{

}

protected void RadGrid1_Init(object sender, EventArgs e)
{
    DefineGridStructure();
}

private void DefineGridStructure()
{
    RadGrid1.MasterTableView.DataKeyNames = new string[] { "EmpId" };

    RadGrid1.Width = Unit.Percentage(98);
    RadGrid1.PageSize = 5;
    RadGrid1.AllowPaging = true;
    RadGrid1.AllowSorting = true;
    RadGrid1.PagerStyle.Mode = GridPagerMode.NextPrevAndNumeric;
    RadGrid1.AutoGenerateColumns = false;
    RadGrid1.ShowStatusBar = true;

    RadGrid1.MasterTableView.PageSize = 5;

    //Add columns
    GridBoundColumn boundColumn;
    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "EmpId";
    boundColumn.HeaderText = "EmpId";
    RadGrid1.MasterTableView.Columns.Add(boundColumn);

    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "Name";
    boundColumn.HeaderText = "Name";
    RadGrid1.MasterTableView.Columns.Add(boundColumn);

    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "Age";
    boundColumn.HeaderText = "Age";
    RadGrid1.MasterTableView.Columns.Add(boundColumn);

    //Detail table - Orders (II in hierarchy level)
    GridTableView tableViewOrders = new GridTableView(RadGrid1);
    tableViewOrders.Width = Unit.Percentage(100);

    tableViewOrders.DataKeyNames = new string[] { "EmpId" };

    GridRelationFields relationFields = new GridRelationFields();
    relationFields.MasterKeyField = "EmpId";
    relationFields.DetailKeyField = "EmpId";
    tableViewOrders.ParentTableRelation.Add(relationFields);

    RadGrid1.MasterTableView.DetailTables.Add(tableViewOrders);

    //Add columns
    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "Street";
    boundColumn.HeaderText = "Street";
    tableViewOrders.Columns.Add(boundColumn);

    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "City";
    boundColumn.HeaderText = "City";
    tableViewOrders.Columns.Add(boundColumn);

    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "Zip";
    boundColumn.HeaderText = "Zip";
    tableViewOrders.Columns.Add(boundColumn);


    //New Detail Table #2 - adds in a another class that stores data


    GridTableView tableViewOrders2 = new GridTableView(RadGrid1);
    tableViewOrders2.Width = Unit.Percentage(100);

    tableViewOrders2.DataKeyNames = new string[] { "EmpId" };

    GridRelationFields relationFields2 = new GridRelationFields();
    relationFields2.MasterKeyField = "EmpId";
    relationFields2.DetailKeyField = "EmpId";
    tableViewOrders2.ParentTableRelation.Add(relationFields2);

    RadGrid1.MasterTableView.DetailTables.Add(tableViewOrders2);

    //Add columns
    boundColumn = new GridBoundColumn();
    boundColumn.DataField = "HobbyName";
    boundColumn.HeaderText = "HobbyName";
    tableViewOrders2.Columns.Add(boundColumn);

}

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    List<Employee> empList = GetEmployeeDetails();

    DataSet dataset = new DataSet("DataSet");

    System.Data.DataTable dt1 = new System.Data.DataTable();
    dt1.TableName = "Employee";
    dt1.Columns.Add("EmpId");
    dt1.Columns.Add("Name");
    dt1.Columns.Add("Age");
    dataset.Tables.Add(dt1);

    System.Data.DataTable dt2 = new System.Data.DataTable();
    dt2.TableName = "Address";
    dt2.Columns.Add("EmpId");
    dt2.Columns.Add("Street");
    dt2.Columns.Add("City");
    dt2.Columns.Add("Zip");
    dataset.Tables.Add(dt2);


    //New datatable that stores the new classes' data
    DataTable dt3 = new DataTable();
    dt3.TableName = "Hobby";
    dt3.Columns.Add("EmpId");
    dt3.Columns.Add("HobbyName");
    dataset.Tables.Add(dt3);


    foreach (Employee emp in empList)
    {
        dt1.Rows.Add(new object[] { emp.EmpId, emp.Name, emp.Age });

        foreach (Address add in emp.Address)
        {
            dt2.Rows.Add(new object[] { emp.EmpId, add.Street, add.City, add.Zip });
        }
        //New data add loop
        foreach (Hobby hob in emp.Hobby)
        {
            dt3.Rows.Add(new object[] { emp.EmpId, hob.HobbyName });
        }


    }

    RadGrid1.MasterTableView.DataSource = dataset.Tables["Employee"];
    RadGrid1.MasterTableView.DetailTables[0].DataSource = dataset.Tables["Address"];
    //Add the new table to the grid
    RadGrid1.MasterTableView.DetailTables[1].DataSource = dataset.Tables["Hobby"];
}

private List<Employee> GetEmployeeDetails()
{
    List<Employee> myEmployees = new List<Employee>();

    Employee Steve = new Employee()
    {
        Address = new List<Address>() { new Address { City = "op", Street = "thatstreet", Zip = 23312 } },
        Hobby = new List<Hobby>() { new Hobby() { HobbyName = "Skating" } },
        Age = 23,
        EmpId = "Emp1",
        Name = "SteveIsTheName"
    };


    Employee Carol = new Employee()
    {
        Address = new List<Address>() {
                    new Address { City = "op2", Street = "thatstreet2", Zip = 23313 },
                    new Address { City = "op3", Street = "thatstreet3", Zip = 23314 }},
        Hobby = new List<Hobby>() { new Hobby() { HobbyName = "Fishing" } },
        Age = 24,
        EmpId = "Emp2",
        Name = "CarolIsTheName"
    };

    myEmployees.Add(Steve);
    myEmployees.Add(Carol);

    return myEmployees;
}
}

class Employee
{
    public List<Address> Address { get; set; }

    public List<Hobby> Hobby { get; set; }

    public int Age { get; set; }

    public string Name { get; set; }

    public string EmpId { get; set; }
}

class Address
{
    public string Street { get; set; }

    public string City { get; set; }

    public int Zip { get; set; }
}

class Hobby
{
    public string HobbyName { get; set; }
}