Quick Start

This quick start section gets you started with using Bitmap for loading an image. You begin by creating a WinForms application in Visual Studio, adding a sample image to your application, and adding code to load the sample image in a picture box using Bitmap. The code given in this section illustrates loading an image into bitmap through a stream object.

Complete the steps given below to see how Bitmap can be used to load an image in a picture box.

The following image shows how the application displays an image loaded in bitmap on a button click.

Load image on a button click using ComponentOne Bitmap for WinForms

Step 1: Setting up the application and adding a sample image

Create a WinForms application in Visual Studio.
Add the following references to your application.
- C1.Win.4
- C1.Win.Bitmap.4.5.2
- C1.Win.C1DX.4.5.2
In the Solution Explorer, right click your project name and select Add | New Folder and name it as 'Resources'.
In Visual Studio, add a sample image to the Resources folder and set its Build Action property to Embedded Resource from the Properties pane.
Add a standard Button control for loading a sample image on button click, and a PictureBox control for displaying the sample image onto the Form.
Set the Text property of the button to a suitable text from the Properties pane.
Set the SizeMode property of the picture box to StretchImage from the Properties pane.

Step 2: Adding code to load image using Bitmap

Switch to the code view and add the following import statements.

Imports C1.Win.Bitmap
Imports C1.Util.DX
Imports System.Reflection
Imports System.IO

using C1.Win.Bitmap;
using C1.Util.DX;
using System.Reflection;
using System.IO;

Initialize a bitmap in the Form1 class.

'Initialize a Bitmap
Dim bitmap As New C1Bitmap()

//Initialize a Bitmap
C1Bitmap bitmap = new C1Bitmap();

Subscribe a button click event and add the following code for loading the sample image into bitmap from a stream object.

'Load image through stream on button click
Private Sub Btn_Load_Click(sender As Object, e As EventArgs) Handles Btn_Load.Click
    Dim t As Type = Me.GetType
    Dim asm As Assembly = t.Assembly
    Dim stream As Stream = asm.GetManifestResourceStream(t, "Lenna1.png")
    bitmap.Load(stream, New FormatConverter(PixelFormat.Format32bppPBGRA))
    UpdateImage()
End Sub

//Load image through stream on button click 
private void button1_Click(object sender, EventArgs e)
{
    Assembly asm = typeof(Form1).Assembly;
    using (Stream stream = asm.GetManifestResourceStream
        ("LoadBitmapStream.Resources.bitmap-sample.png"))
    {
        bitmap.Load(stream, 
            new FormatConverter(PixelFormat.Format32bppPBGRA));                
    }
    UpdateImage();
}

Add the following code to define UpdateImage method for displaying the image in the picture box.

'Display the image loaded in bitmap 
Private Sub UpdateImage()
    Dim bmp = pictureBox1.Image
    bmp = bitmap.ToGdiBitmap()
    pictureBox1.Image = bmp
    pictureBox1.Width = bmp.Width
    pictureBox1.Height = bmp.Height
End Sub

//Display the image loaded in bitmap 
private void UpdateImage()
{
    var bmp = pictureBox1.Image as Bitmap;
    bmp = bitmap.ToGdiBitmap();
    pictureBox1.Image = bmp;                     
}

Quick Start

Step 1: Setting up the application and adding a sample image

Step 2: Adding code to load image using Bitmap

See Also