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DataSourceUpdateMode Enumeration

Specifies when a data source is updated when changes occur in the bound control.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)
public enum DataSourceUpdateMode
Member nameDescription
OnValidationData source is updated when the control property is validated,

After validation, the value in the control property will also be re-formatted.

OnPropertyChangedData source is updated whenever the value of the control property changes.
NeverData source is never updated and values entered into the control are not parsed, validated or re-formatted.

When a control is bound to a data source using a Binding object, you can specify when an update to the data source will occur using the DataSourceUpdateMode enumeration.

When the update mode is Never, you can force the data source to be updated by using the WriteValue method.

NoteNote

Even when the update mode is set to Never, the data source will be updated when the binding is first created, so at that least one update will always occur.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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