How do you define DataTable columns?

What are DataTable columns?

Description. The columns option in the initialisation parameter allows you to define details about the way individual columns behave. For a full list of column options that can be set, please see the related parameters below.

How do you define a DataTable?

If you are creating a DataTable programmatically, you must first define its schema by adding DataColumn objects to the DataColumnCollection (accessed through the Columns property). For more information about adding DataColumn objects, see Adding Columns to a DataTable.

How can you identify a column in a DataTable?

By using the Column name or Column index we can identify a column in a data table.

How do I add a column to a DataTable?

You create DataColumn objects within a table by using the DataColumn constructor, or by calling the Add method of the Columns property of the table, which is a DataColumnCollection. The Add method accepts optional ColumnName, DataType, and Expression arguments and creates a new DataColumn as a member of the collection.