ListControlDesigner.OnDataSourceChanged Method

public:
 virtual void OnDataSourceChanged();

public virtual void OnDataSourceChanged ();

abstract member OnDataSourceChanged : unit -> unit
override this.OnDataSourceChanged : unit -> unit

override this.OnDataSourceChanged : unit -> unit

Public Overridable Sub OnDataSourceChanged ()

Examples

The following code example overrides the OnDataSourceChanged method in a class that inherits from the ListControlDesigner class. When the data source that is associated with the designer class changes, the OnDataSourceChanged method is called and this code sets a variable named changedDataSource to true.

This code example is part of a larger example provided for the ListControlDesigner class.

// If the data source changes, set a boolean variable.
public override void OnDataSourceChanged()
{
    changedDataSource = true;
} // OnDataSourceChanged

' If the data source changes, set a Boolean variable.
Public Overrides Sub OnDataSourceChanged()
    changedDataSource = True
End Sub

Remarks

The OnDataSourceChanged base method connects the associated control that is derived from the ListControl object to the current data source and, if that is different from the data source to which the control was connected, updates the design-time markup. The OnDataSourceChanged method updates the design-time markup after connecting to the current data source.

See also

• ListControl
• OnDataSourceChanged(Boolean)
• DataSource
• ConnectToDataSource()
• UpdateDesignTimeHtml()

protected:
 override void OnDataSourceChanged(bool forceUpdateView);

protected override void OnDataSourceChanged (bool forceUpdateView);

override this.OnDataSourceChanged : bool -> unit

Protected Overrides Sub OnDataSourceChanged (forceUpdateView As Boolean)

Parameters

Examples

The following code example overrides the OnDataSourceChanged method in a class that inherits from the ListControlDesigner class. When the data source that is associated with the designer class changes, the OnDataSourceChanged is called and this code sets a variable named changedDataSource to true.

This code example is part of a larger example provided for the ListControlDesigner class.

// If the data source changes, set a boolean variable.
public override void OnDataSourceChanged()
{
    changedDataSource = true;
} // OnDataSourceChanged

' If the data source changes, set a Boolean variable.
Public Overrides Sub OnDataSourceChanged()
    changedDataSource = True
End Sub

Remarks

The OnDataSourceChanged base method connects the associated control that is derived from the ListControl class to the current data source and, if that is different from the data source to which the control was connected, updates the design-time markup. The OnDataSourceChanged method of the designer unconditionally updates the design-time markup after connecting to the current data source. The value of forceUpdateView is ignored.

Notes to Callers

Callers should use the public OnDataSourceChanged() override.

See also

• ListControl
• OnDataSourceChanged(Boolean)
• DataSource
• ConnectToDataSource()
• UpdateDesignTimeHtml()