I would like to show a animated gif in .Net Winform. How to do this?
I previously used VB 6.0.
Put a PictureBox
on a form and then specify a picture file with a Gif extension. Or:
Programatically animate a gif Image loading frames into a PictureBox
with code, here's the Gif class:
VB.NET
Imports System.Drawing.Imaging
Imports System.Drawing
Public Class GifImage
Private gifImage As Image
Private dimension As FrameDimension
Private frameCount As Integer
Private currentFrame As Integer = -1
Private reverse As Boolean
Private [step] As Integer = 1
Public Sub New(path As String)
gifImage = Image.FromFile(path)
'initialize
dimension = New FrameDimension(gifImage.FrameDimensionsList(0))
'gets the GUID
'total frames in the animation
frameCount = gifImage.GetFrameCount(dimension)
End Sub
Public Property ReverseAtEnd() As Boolean
'whether the gif should play backwards when it reaches the end
Get
Return reverse
End Get
Set
reverse = value
End Set
End Property
Public Function GetNextFrame() As Image
currentFrame += [step]
'if the animation reaches a boundary...
If currentFrame >= frameCount OrElse currentFrame < 0 Then
If reverse Then
[step] *= -1
'...reverse the count
'apply it
currentFrame += [step]
Else
currentFrame = 0
'...or start over
End If
End If
Return GetFrame(currentFrame)
End Function
Public Function GetFrame(index As Integer) As Image
gifImage.SelectActiveFrame(dimension, index)
'find the frame
Return DirectCast(gifImage.Clone(), Image)
'return a copy of it
End Function
End Class
C#
using System.Drawing.Imaging;
using System.Drawing;
public class GifImage
{
private Image gifImage;
private FrameDimension dimension;
private int frameCount;
private int currentFrame = -1;
private bool reverse;
private int step = 1;
public GifImage(string path)
{
gifImage = Image.FromFile(path);
//initialize
dimension = new FrameDimension(gifImage.FrameDimensionsList[0]);
//gets the GUID
//total frames in the animation
frameCount = gifImage.GetFrameCount(dimension);
}
public bool ReverseAtEnd {
//whether the gif should play backwards when it reaches the end
get { return reverse; }
set { reverse = value; }
}
public Image GetNextFrame()
{
currentFrame += step;
//if the animation reaches a boundary...
if (currentFrame >= frameCount || currentFrame < 0) {
if (reverse) {
step *= -1;
//...reverse the count
//apply it
currentFrame += step;
}
else {
currentFrame = 0;
//...or start over
}
}
return GetFrame(currentFrame);
}
public Image GetFrame(int index)
{
gifImage.SelectActiveFrame(dimension, index);
//find the frame
return (Image)gifImage.Clone();
//return a copy of it
}
}
C# usage:
Open a Winform project drag and drop in a PictureBox
, a Timer and a Button, with the GifImage.cs
the class is shown above.
public partial class Form1: Form
{
private GifImage gifImage = null;
private string filePath = @"C:\Users\Jeremy\Desktop\ExampleAnimation.gif";
public Form1()
{
InitializeComponent();
//a) Normal way
//pictureBox1.Image = Image.FromFile(filePath);
//b) We control the animation
gifImage = new GifImage(filePath);
gifImage.ReverseAtEnd = false; //dont reverse at end
}
private void button1_Click(object sender, EventArgs e)
{
//Start the time/animation
timer1.Enabled = true;
}
//The event that is animating the Frames
private void timer1_Tick(object sender, EventArgs e)
{
pictureBox1.Image = gifImage.GetNextFrame();
}
}
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