Help me to compare 2 images with each other.

The probable reason why that doesn't work is that you've loaded the image from the file twice using Image.FromFile() or some other method.

A new Image object would be created each time even though you were loading the image from the same file and so Equals() would not work.

In my sample code, I was only loading the image from the file once and then assigning it to the Image properties of the two buttons.

If you're using a fixed number of images in your application, then you could consider loading them all into an image array to begin with and then assigning them to the buttons as needed. That way the same image file would always be represented by the same Image object and so the Equals() method would work.

If this isn't practical, then the only way to compare the images would be byte by byte as in Manish's code.

Hi Alan, I modified your code into my application, but it doesn’t work yet.

Button btn01 = new Button();

Button btn02 = new Button();

Image img;

//Image in Tribe.fields.square[i, j].Image and //Tribe.squareimage.person.Images[0] are from the same file

img = Tribe.fields.square[i, j].Image;

btn01.Image = img;

btn02.Image = Tribe.squareimage.person.Images[0];

Tribe.fields.square[i, j].Image = null;

if (btn01.Image.Equals(btn02.Image))

{

 Tribe.fields.square[cell.Row, cell.Col].Image = img;

//Tribe.squareimage.person.Images[0];

 Tribe.fields.square[cell.Row, cell.Col].BackColor = Color.Red;

}

else

MessageBox.Show("not the same");

The result is “not the same” in MessageBox, L

If you just want to check that the Image objects are the same, then load them to a temporary variable first:

Image img = Image.FromFile(path);
button1.Image = img;
button2.Image = img;

if (button1.Image.Equals(button2.Image))
  MessageBox.Show("the same images");
else
  MessageBox.Show("different images");

Hi,
   I think u can't directly compare the two images. u can do comparison by using this code.

Public Class Form1

    Dim f1, f2 As String

    Private Sub Button1_Click(ByVal sender As System.Object, _

    ByVal e As System.EventArgs) Handles Button1.Click

        Dim ofd As New OpenFileDialog

        ofd.Filter = "JPG files (*.jpg)|*.jpg|All files (*.*)|*.*"

        MsgBox("Select the first file")

        If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then

            f1 = ofd.FileName

        End If

        MsgBox("Select the second file")

        If ofd.ShowDialog = Windows.Forms.DialogResult.OK Then

            f2 = ofd.FileName

        End If

        If Samebytes(f1, f2) Then

            MsgBox("Files are the same")

        Else

            MsgBox("Files are different")

        End If

    End Sub

    Private Function Samebytes(ByVal f1 As String, _

        ByVal f2 As String) As Boolean

        Dim byte1() As Byte = My.Computer.FileSystem.ReadAllBytes(f1)

        Dim byte2() As Byte = My.Computer.FileSystem.ReadAllBytes(f2)

        If byte1.Length <> byte2.Length Then

            Return False

        End If

        For x As Integer = 0 To byte1.Length - 1

            If byte1.GetValue(x).ToString <> byte2.GetValue(x).ToString Then

                Return False

            End If

        Next

        Return True

    End Function

End Class