AllowDBNull Property

DataColumn.AllowDBNull Property


Gets or sets a value that indicates whether null values are allowed in this column for rows that belong to the table.

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

public bool AllowDBNull { get; set; }

Property Value

Type: System.Boolean

true if null values values are allowed; otherwise, false. The default is true.

The following example creates a new DataColumn and sets its AllowDBNull property to true.

private void AddNullAllowedColumn()
    DataColumn column;
    column = new DataColumn("classID", 
    column.AllowDBNull = true;

    // Add the column to a new DataTable.
    DataTable table;
    table = new DataTable();

.NET Framework
Available since 1.1
Return to top
© 2015 Microsoft