DataColumn.ReadOnly Property
.NET Framework 3.0
Gets or sets a value that indicates whether the column allows for changes as soon as a row has been added to the table.
Namespace: System.Data
Assembly: System.Data (in system.data.dll)
Assembly: System.Data (in system.data.dll)
'Declaration Public Property ReadOnly As Boolean 'Usage Dim instance As DataColumn Dim value As Boolean value = instance.ReadOnly instance.ReadOnly = value
/** @property */ public boolean get_ReadOnly () /** @property */ public void set_ReadOnly (boolean value)
public function get ReadOnly () : boolean public function set ReadOnly (value : boolean)
Not applicable.
Property Value
true if the column is read only; otherwise, false. The default is false.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 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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