How to remove or hide particular column in a datatable?

Question

I am using C#. I want to hide or remove the column from DataTable or DataSet . I attach my partial code:

DataTable dt = new DataTable();
DataView dv = new DataView();
dv = (DataView)Session["map_hi"];
dt = dv.ToTable();
dt.Columns[0].ColumnMapping = MappingType.Hidden;
dt.AcceptChanges();

Answer 1

try this

   DataTable t;
   t.Columns.Remove("columnName");
   t.Columns.RemoveAt(columnIndex);

Answer 2

As Pranay says you can remove columns as myTable.Columns.Remove("columnName");

But in my case it throws an exception as "Cannot remove this column, because it is part of the parent key for relationship"

I was able to overcome it as below.

  myTable.ParentRelations.Clear();
  myTable.ChildRelations.Clear();
  myTable.Constraints.Clear();
  myTable.Columns.Remove("columnName"); 

Hope this will help someone