Hi,

I have read the samples of transparent Picturebox, but i was not able
to get it working could anyone help me in solving the problem

****************************** Class code for Transparent PicBox
*************

Imports System.Drawing.Imaging

Imports System.Drawing.Imaging.ImageAttributes


Public Class PictureboxEX


    Inherits System.Windows.Forms.PictureBox


    Protected Overrides Sub OnPaint(ByVal e As
System.Windows.Forms.PaintEventArgs)


        Dim attr As Imaging.ImageAttributes = New
Imaging.ImageAttributes()
        attr.SetColorKey(Color.Transparent, Color.Transparent)
        '  attr.SetColorKey(Color.FromArgb(255, 0, 255),
Color.FromArgb(255, 0, 255))
        e.Graphics.DrawImage(Me.Image, Me.ClientRectangle, 0, 0,
Me.Image.Width, Me.Image.Height, GraphicsUnit.Pixel, attr)
    End Sub
    Protected Overloads Overrides Sub OnPaintBackground(ByVal e As
System.Windows.Forms.PaintEventArgs)
        Dim sb As New SolidBrush(Parent.BackColor)
        e.Graphics.FillRectangle(sb, Me.ClientRectangle)

    End Sub


End Class


************************** Form Code *********************

Public Class Form1
    Protected WithEvents pb As PictureboxEX = New PictureboxEX
    Dim x, y As Integer
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button1.Click
        ' Dim pb1 As New PictureboxEX
        Dim pb As PictureboxEX = New PictureboxEX

        pb.Image = Image.FromFile("C:\gif1.gif")


        pb.Location = New System.Drawing.Point(x, 0)
        x += 50
        ' pb.Size = New System.Drawing.Size(240, 240)


        Me.PictureBox1.Location = New System.Drawing.Point(56, 88)
        Me.Picturebox1.Controls.Add(pb)


    End Sub
End Class
***************************************

but when we use the code, we are not getting the true transparency, if
we want to see through the pictureboxes we cant, the black color of
is coming instead of form.

thanks & regards

vikas

This is in C#
Your SetColorKey need some changes,

try this
Bitmap bmp = new Bitmap(base.Image);
attr.SetColorKey(bmp.GetPixel(0, 0), bmp.GetPixel(0, 0))

Please let me know if this solved your issue.



On Aug 1, 6:09 am, vikasmade...@gmail.com wrote:

> Hi,
>
> I have read the samples of transparent Picturebox, but i was not able
> to get it working could anyone help me in solving the problem
>
> ****************************** Class code for Transparent PicBox
> *************
>
> Imports System.Drawing.Imaging
>
> Imports System.Drawing.Imaging.ImageAttributes
>
> Public Class PictureboxEX
>
>     Inherits System.Windows.Forms.PictureBox
>
>     Protected Overrides Sub OnPaint(ByVal e As
> System.Windows.Forms.PaintEventArgs)
>
>         Dim attr As Imaging.ImageAttributes = New
> Imaging.ImageAttributes()
>         attr.SetColorKey(Color.Transparent, Color.Transparent)
>         '  attr.SetColorKey(Color.FromArgb(255, 0, 255),
> Color.FromArgb(255, 0, 255))
>         e.Graphics.DrawImage(Me.Image, Me.ClientRectangle, 0, 0,
> Me.Image.Width, Me.Image.Height, GraphicsUnit.Pixel, attr)
>     End Sub
>     Protected Overloads Overrides Sub OnPaintBackground(ByVal e As
> System.Windows.Forms.PaintEventArgs)
>         Dim sb As New SolidBrush(Parent.BackColor)
>         e.Graphics.FillRectangle(sb, Me.ClientRectangle)
>
>     End Sub
>
> End Class
>
> ************************** Form Code *********************
>
> Public Class Form1
>     Protected WithEvents pb As PictureboxEX = New PictureboxEX
>     Dim x, y As Integer
>     Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
> As System.EventArgs) Handles Button1.Click
>         ' Dim pb1 As New PictureboxEX
>         Dim pb As PictureboxEX = New PictureboxEX
>
>         pb.Image = Image.FromFile("C:\gif1.gif")
>
>         pb.Location = New System.Drawing.Point(x, 0)
>         x += 50
>         ' pb.Size = New System.Drawing.Size(240, 240)
>
>         Me.PictureBox1.Location = New System.Drawing.Point(56, 88)
>         Me.Picturebox1.Controls.Add(pb)
>
>     End Sub
> End Class
> ***************************************
>
> but when we use the code, we are not getting the true transparency, if
> we want to see through the pictureboxes we cant, the black color of
> is coming instead of form.
>
> thanks & regards
>
> vikas

Hi Arun,

Sorry i didnt work, still the black background is coming behind the
image.

thanks for posting.



*** Sent via Developersdex http://www.developersdex.com ***

Override OnPaintBackground() and do nothing in it.  That should work.


-- 
Mark Arteaga 
Principal Partner 
OpenNETCF Consulting 
http://www.opennetcf.com | http://blog.markarteaga.com


> Hi Arun,
> 
> Sorry i didnt work, still the black background is coming behind the
> image.
> 
> thanks for posting.
> 
> *** Sent via Developersdex http://www.developersdex.com ***
>