DataColumn.ReadOnly Property
Gets or sets a value that indicates whether the column allows for changes as soon as a row has been added to the table.
Assembly: System.Data (in System.Data.dll)
Property Value
Type: System.Booleantrue if the column is read only; otherwise, false. The default is false.
| Exception | Condition |
|---|---|
| ArgumentException | The property is set to false on a computed column. |
The following example creates a DataColumn and sets its ReadOnly property true.
Private Sub AddColumn(ByVal table As DataTable) ' Add a DataColumn to the collection and set its properties. ' The constructor sets the ColumnName of the column. Dim column As DataColumn = table.Columns.Add("Total") column.DataType = System.Type.GetType("System.Decimal") column.ReadOnly = True column.Expression = "UnitPrice * Quantity" column.Unique = False End Sub
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.