C#中DataType

 public DataTable MakeDataTable(){ DataTable myTable; DataRow myNewRow; // Create a new DataTable. myTable = new DataTable("My Table"); // Create DataColumn objects of data types. DataColumn colString = new DataColumn("StringCol"); colString.DataType = System.Type.GetType("System.String"); myTable.Columns.Add(colString); DataColumn colInt32 = new DataColumn("Int32Col"); colInt32.DataType = System.Type.GetType("System.Int32"); myTable.Columns.Add(colInt32); DataColumn colBoolean = new DataColumn("BooleanCol"); colBoolean.DataType = System.Type.GetType("System.Boolean"); myTable.Columns.Add(colBoolean); DataColumn colTimeSpan = new DataColumn("TimeSpanCol"); colTimeSpan.DataType = System.Type.GetType("System.TimeSpan"); myTable.Columns.Add(colTimeSpan); DataColumn colDateTime = new DataColumn("DateTimeCol"); colDateTime.DataType = System.Type.GetType("System.DateTime"); myTable.Columns.Add(colDateTime); DataColumn colDecimal = new DataColumn("DecimalCol"); colDecimal.DataType = System.Type.GetType("System.Decimal"); myTable.Columns.Add(colDecimal); // Populate one row with values. myNewRow = myTable.NewRow(); myNewRow["StringCol"] = "Item Name"; myNewRow["Int32Col"] = 2147483647; myNewRow["BooleanCol"] = true; myNewRow["TimeSpanCol"] = new TimeSpan(10,22,10,15,100); myNewRow["DateTimeCol"] = System.DateTime.Today; myNewRow["DecimalCol"] = 64.0021; myTable.Rows.Add(myNewRow); return myTable; }