TreeListBuilder<T>.Columns(Action<CollectionFactory<TreeListColumnBuilder<T>>>) Method

Provides access to the client-side columns option that represents a TreeList column collection.

Namespace : DevExtreme.AspNet.Mvc.Builders

Assembly : DevExtreme.AspNet.Core.dll

Declaration

public TreeListBuilder<T> Columns(
    Action<CollectionFactory<TreeListColumnBuilder<T>>> configurator
)

Parameters

A function that allows you to add items to the collection.

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Returns

A reference to this instance after the method is called.

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Remarks

To configure a TreeList column collection, use a multiline lambda expression. In this case, a lambda parameter performs the role of a collection factory, and its Add() method adds a new item to the collection. The Add() method returns TreeListColumnBuilder<T> whose methods you can use to configure an item.

• Razor C#

@(Html.DevExtreme().TreeList()
    .Columns(columns => {
        columns.Add(); // call methods to configure a TreeList column
        columns.Add();
    })
)

Refer to Nested Options and Collections for more information.

See Also

TreeListBuilder<T> Class

TreeListBuilder<T> Members

DevExtreme.AspNet.Mvc.Builders Namespace