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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.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

public bool ReadOnly { get; set; }
/** @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.

Exception typeCondition

ArgumentException

The property is set to false on a computed column.

The following example creates a DataColumn and sets its ReadOnly property true.

private void AddColumn(DataTable table)
{
    // Add a DataColumn to the collection and set its properties.
    // The constructor sets the ColumnName of the column.
    DataColumn column = table.Columns.Add("Total");
    column.DataType = System.Type.GetType("System.Decimal");
    column.ReadOnly = true;
    column.Expression = "UnitPrice * Quantity";
    column.Unique = false;
}

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.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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