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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 Value

Type: System.Boolean
true if the column is read only; otherwise, false. The default is false.

ExceptionCondition
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;
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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