[Solved] Aggregate function in column footer and frozen columns bug

[Cyril]

We think we found a bug in the RadGridView:


Code behind, issue from the docs 

    public class Employee
    {
        public string LastName { get; set; }
    }

    public class EmployeeService
    {
        public static ObservableCollection<Employee> GetEmployees()
        {
            ObservableCollection<Employee> employees = new ObservableCollection<Employee>();
            Employee employee = new Employee();
            employee.LastName = "Anders";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Trujillo";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Moreno";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Hardy";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Moos";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Citeaux";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Sommer";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Lebihan";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Lincoln";
            employees.Add(employee);
            employee = new Employee();
            employee.LastName = "Ashworth";
            employees.Add(employee);
            return employees;
        }
    }
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
            this.radGridView.ItemsSource = EmployeeService.GetEmployees();
        }
    }

And the Xaml

<telerik:RadGridView x:Name="radGridView" AutoGenerateColumns="False"
                         ShowColumnFooters="True">
        <telerik:RadGridView.Columns>

            <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction  />
                </telerik:GridViewDataColumn.AggregateFunctions>
            </telerik:GridViewDataColumn>
            <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction  />
                </telerik:GridViewDataColumn.AggregateFunctions>
            </telerik:GridViewDataColumn>
            <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction  />
                </telerik:GridViewDataColumn.AggregateFunctions>
            </telerik:GridViewDataColumn>
            <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction  />
                </telerik:GridViewDataColumn.AggregateFunctions>
            </telerik:GridViewDataColumn>
            <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction  />
                </telerik:GridViewDataColumn.AggregateFunctions>
            </telerik:GridViewDataColumn>
            <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction  />
                </telerik:GridViewDataColumn.AggregateFunctions>
            </telerik:GridViewDataColumn>
        </telerik:RadGridView.Columns>
    </telerik:RadGridView>

We get this: First Image
Move the Frozen Column bar several time, each time, a footer aggregate disappear: Second Image How to resolve that issue?

[Cyril]

Any news on the subject? At least, could you tell me if it is a knowed problem?

[Yordanka]

Hello Cyril,

Thank you for the feedback.
We are aware of this issue and it is logged in our PITS system. You can track its status by following ID7322. To avoid this problem you may freeze the columns using FrozenColumnCount property of the RadgridView and to disable freezing runtime using CanUserFreezeColumns to False. Those, you will have frozen columns but will not be able to freeze/unfreeze columns dragging frozen column separator.
 
All the best,
Yordanka
the Telerik team