Unable to use = operator in a "If" statement

Why can't I use = operator over here. Anyway to solve this problem ?

 If PictureBox1.Image = My.Resources.pic001 Then
       x = 1
    Else
       x = 0
    End If

The error message is:

Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Dra开发者_如何学Gowing.Bitmap'

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Assuming that PictureBox1.Image references the same Image object as My.Resources.pic001, then you could use:

If Object.ReferenceEquals(PictureBox1.Image, My.Resources.pic001) Then

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As the error message says, the operator '=' is not defined for the types you are comparing. i.e. it is not possible to compare a System.Drawing.Image to a System.Drawing.Bitmap

You will need to compare the images bit-by-bit or create a hash value for each one and compare those.

There is a thread here which has a C# example (it shouldn't be hard to convert to VB):

http://www.codeguru.com/forum/showthread.php?t=363130

EDIT: There might be another solution, I have not tried it and I don't know if, and it probably won't, work as expeted but there is an Equals() method available on System.Drawing.Image (and Bitmap is derived from Image). You might have some luck with that.

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You can't compare Images to Bitmaps, they are different things.

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Try this code:

Option Strict On
Option Explicit On

Public Class Form1
    Dim pbImage1 As Image = My.Resources.Swamp 'imported from a file called Swamp.jpg
    Dim pbimage2 As Image = My.Resources.Dusty 'Imported from a file called Dusty.jpg

    Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load
        PictureBox1.Image = pbImage1
    End Sub

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        If PictureBox1.Image Is pbImage1 Then
            PictureBox1.Image = pbimage2
        Else
            PictureBox1.Image = pbImage1
        End If
    End Sub
End Class