System.Data.DataColumn.SetOrdinal C# (CSharp) Method

        public void SetOrdinal(int ordinal)
        {
            if (_ordinal == -1)
            {
                throw ExceptionBuilder.ColumnNotInAnyTable();
            }

            if (_ordinal != ordinal)
            {
                _table.Columns.MoveTo(this, ordinal);
            }
        }

        	public void SetOrdinalTest()
		{
			DataColumn col = new DataColumn("col", typeof(int));
			try {
				col.SetOrdinal(2);
				Assert.Fail ("#1");
			} catch (ArgumentException e) { }

			DataTable table = new DataTable();
			DataColumn col1 = table.Columns.Add ("col1", typeof (int));
			DataColumn col2 = table.Columns.Add("col2", typeof(int));
			DataColumn col3 = table.Columns.Add("col3", typeof(int));

			Assert.AreEqual("col1", table.Columns[0].ColumnName, "#2");
			Assert.AreEqual("col3", table.Columns[2].ColumnName, "#3");

			table.Columns[0].SetOrdinal (2);
			Assert.AreEqual("col2", table.Columns[0].ColumnName, "#4");
			Assert.AreEqual("col1", table.Columns[2].ColumnName, "#5");

			Assert.AreEqual(0, col2.Ordinal, "#6");
			Assert.AreEqual(1, col3.Ordinal, "#7");
			Assert.AreEqual(2, col1.Ordinal, "#8");

			try {
				table.Columns[0].SetOrdinal (-1);
				Assert.Fail ("#9");
			} catch (ArgumentOutOfRangeException e) { }

			try {
				table.Columns[0].SetOrdinal (4);
				Assert.Fail ("#10");
			} catch (ArgumentOutOfRangeException e) { }
		}