SchemaTableColumn.AllowDBNull Field
Important
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Specifies whether value DBNull is allowed.
public: static initonly System::String ^ AllowDBNull;C#
public static readonly string AllowDBNull; staticval mutable AllowDBNull : stringPublic Shared ReadOnly AllowDBNull As String Returns the string "true" if DBNull is allowed; otherwise "false".
Note
Avoid setting AllowDbNull to "true" for primary key columns. A column defined as a primary key can be set to AllowDbNull, but a null value cannot be assigned to it.
| Product | Versions |
|---|---|
| .NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
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