How to apply transparent color to WinForms GridGroupingControl?

Apply transparent back color

To apply a transparent back color to the WinForms GridGroupingControl, you need to create a derived class that inherits from the GridGroupingControl. In that derived class, override the OnParentBackColorChanged and OnPropertyChanged methods and set the SupportsTransparentBackColor value to true or SetStyle(ControlStyles.SupportsTransparentBackColor, True).

Overriding the GridGroupingControl:

public class MyGGC : GridGroupingControl
{
    public MyGGC()
    {
        //Sets the SupportsTransparentBackColor value.
        SetStyle(ControlStyles.SupportsTransparentBackColor, true);        
    }

    protected override void OnParentBackColorChanged(EventArgs e)
    {
        base.OnParentBackColorChanged(e);
        //Sets the BackColor to the Grid.
        BackColor = Parent.BackColor;
    }

    protected override void OnBackColorChanged(EventArgs e)
    {
        Console.WriteLine("MyGGC:OnBackColorChanged called");
        base.OnBackColorChanged(e);
    }

    protected override void OnParentChanged(EventArgs e)
    {
        Console.WriteLine("MyGGC:OnParentChanged called");
        base.OnParentChanged(e);
        BackColor = Parent.BackColor;
    }
}

Public Class MyGGC
Inherits GridGroupingControl
   Public Sub New()
       'Sets the BackColor to the Grid.
       SetStyle(ControlStyles.SupportsTransparentBackColor, True)
   End Sub

   Protected Overrides Sub OnParentBackColorChanged(ByVal e As EventArgs)
       MyBase.OnParentBackColorChanged(e)
       'Sets the SupportsTransparentBackColor value.
       BackColor = Parent.BackColor
   End Sub

   Protected Overrides Sub OnBackColorChanged(ByVal e As EventArgs)
       Console.WriteLine("MyGGC:OnBackColorChanged called")
       MyBase.OnBackColorChanged(e)
   End Sub

   Protected Overrides Sub OnParentChanged(ByVal e As EventArgs)
       Console.WriteLine("MyGGC:OnParentChanged called")
       MyBase.OnParentChanged(e)
       BackColor = Parent.BackColor
   End Sub

End Class

Adding custom GridGroupingControl:

In the form InitializeComponent method, create an instance for the derived GridGroupingControl.

private MyGGC gridGroupingControl1;
//In the InitializeComponets().
this.gridGroupingControl1 = new MyGGC();

Private gridGroupingControl1 As MyGGC
'In the InitializeComponets()
Me.gridGroupingControl1 = New MyGGC()

Set the TransparentBackColor:

//Sets the BackColor to the Form.
this.BackColor = Color.LightBlue;

//Allows Transparent Color to the GGC.
this.gridGroupingControl1.TableControl.SupportsTransparentBackColor = true;
this.gridGroupingControl1.TableControl.BackColor = Color.Transparent;
this.gridGroupingControl1.TableModel.Properties.BackgroundColor = Color.Transparent;

'Sets the BackColor to the Form.
Me.BackColor = Color.LightBlue

'Sets Transparent Back Color to the GGC.
Me.gridGroupingControl1.TableControl.SupportsTransparentBackColor = True
Me.gridGroupingControl1.TableControl.BackColor = Color.Transparent
Me.gridGroupingControl1.TableModel.Properties.BackgroundColor = Color.Transparent

The screenshot below illustrates the background color for GridGroupingControl.

Show transparent color applied to the in WinForms GridGroupingControl

Figure 1: Transparent color applied to the GGC

Samples:

C#: TransparentColorGGC-CS.zip

VB: TransparentColorGGC-VB.zip

Conclusion

I hope you enjoyed learning about how to apply transparent color to GridGroupingControl.

You can refer to our WinForms GridGroupingControl feature tour page to know about its other groundbreaking feature representations and WinForms GridGroupingControl documentation, and how to quickly get started for configuration specifications.

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How to apply transparent color to WinForms GridGroupingControl?

Apply transparent back color

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