GridView - The new Columns.Add method overload uses model-based properties and lambda expressions to create cell bands

Previously, you should have used temporary variables and the Columns.AddRange method to create cell bands.

Example:

Given GridView model:

C#
public string Address { get; set; }
public string Country { get; set; }
public string City { get; set; }
public string Street { get; set; }

Creation syntax:

Razor
settings.Columns.Add(m => m.Address, c => {
        c.Columns.AddRange(
        new GridViewColumn[] {
                settings.Columns.Add(m => m.Country),
                settings.Columns.Add(m => m.City),
                settings.Columns.Add(m => m.Street),
            }
        );
    });

or

Razor
var c1 = settings.Columns.Add(m => m.Country);
var c2 = settings.Columns.Add(m => m.City);
var c3 = settings.Columns.Add(m => m.Street);

settings.Columns.Add<string>(m => m.Address, c => {
    c.Columns.AddRange(new GridViewColumn[] { c1, c2, c3, } );
});

Starting with version 19.2, we've changed the Columns.Add method overload. You can now use model-based properties and lambda expressions to create cell bands:

Razor
settings.Columns.Add(m => m.Address, c => {
    c.Columns.Add(m => m.Country);
    c.Columns.Add(m => m.City);
    c.Columns.Add(m => m.Street);
});

Old method declaration:

C#
public MVCxGridViewColumn<ValueType> Add<ValueType>(Expression<Func<RowType, ValueType>> expression, Action<MVCxGridViewColumn> method)  

New method declaration:

C#
public MVCxGridViewColumn<RowType> Add<ValueType>(Expression<Func<RowType, ValueType>> expression, Action<MVCxGridViewColumn<RowType>> method)

This change may affect your application.

Note: This breaking change relates only to scenarios where you use the Columns.Add method overload that accepts an action as a parameter.

For example, modify your code in the following manner and use a GridView’s mode type or the „var“ keyword if you store the Columns.Add method's result as a variable of the MVCxGridViewColumn<T> type:

Original code:

Razor
MVCxGridViewColumn<string> addressColumn = settings.Columns.Add(m => m.Address, c => { c.Caption = "Address"; });

Use GridView's mode type:

Razor
MVCxGridViewColumn<Person> addressColumn = settings.Columns.Add(m => m.Address, c => { c.Caption = "Address"; });

Use the "var" keyword:

Razor
var addressColumn = settings.Columns.Add(m => m.Address);

Additionally, in v19.2 use the following syntax …

Razor
var cAdress = settings.Columns.Add(m => m.CustomerAddress, c => { c.Caption = "Address"; });
cAdress.Columns.Add(m => m.CustomerAddress.Country);
cAdress.Columns.Add(m => m.CustomerAddress.City);
cAdress.Columns.Add(m => m.CustomerAddress.Street);

… if your model class contains complex properties and you rely on complex properties‘ types while using the Columns.Add method:

C#
public class Customer {
    public Address CustomerAddress { get; set; }
}
public class Address {
    public string Country { get; set; }
    public string City { get; set; }
    public string Street { get; set; }
}

…

Razor
var cAdress = settings.Columns.Add(m => m.CustomerAddress, c => { c.Caption = "Address"; });
cAdress.Columns.Add(m => m.Country);
cAdress.Columns.Add(m => m.City);
cAdress.Columns.Add(m => m.Street);

This change may also affect your code if you cast a method parameter and/or the result of this method to MVCxGridViewColumn<T>.