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DataColumn.ReadOnly Property

Definition

Namespace:
System.Data
Assemblies:
netstandard.dll, System.Data.Common.dll
Assembly:
System.Data.Common.dll
Assembly:
System.Data.dll
Assembly:
netstandard.dll
Source:
DataColumn.cs
Source:
DataColumn.cs
Source:
DataColumn.cs
Source:
DataColumn.cs
Source:
DataColumn.cs

Important

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Gets or sets a value that indicates whether the column allows for changes as soon as a row has been added to the table.

public:
 property bool ReadOnly { bool get(); void set(bool value); };
public bool ReadOnly { get; set; }
[System.Data.DataSysDescription("DataColumnReadOnlyDescr")]
public bool ReadOnly { get; set; }
member this.ReadOnly : bool with get, set
[<System.Data.DataSysDescription("DataColumnReadOnlyDescr")>]
member this.ReadOnly : bool with get, set
Public Property ReadOnly As Boolean

Property Value

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

Attributes

Exceptions

The property is set to false on a computed column.

Examples

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;
}

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

Applies to

See also

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