System.Data.Tests.DataColumnCollectionTest2.TestIndexOf_ByColumnName C# (CSharp) Method

        public void TestIndexOf_ByColumnName()
        {
            DataTable dt = DataProvider.CreateParentDataTable();

            for (int i = 0; i < dt.Columns.Count; i++)
            {
                Assert.Equal(i, dt.Columns.IndexOf(dt.Columns[i].ColumnName));
            }

            DataColumn col = new DataColumn();

            Assert.Equal(-1, dt.Columns.IndexOf("temp1"));

            Assert.Equal(-1, dt.Columns.IndexOf((string)null));
        }