ReadOnly Property

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 Value

Type: System.Boolean

true if the column is read only; otherwise, false. The default is false.

Exception Condition

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;

.NET Framework
Available since 1.1
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