You have seen the Open File dialogue box countless times. It’s
the one that appears whenever you click File > Open on a Windows machine.
You then navigate through folders, searching for the file you want to open.
For our View Images menu, we’ll do something slightly more complex – we’ll have
our own Open File dialogue box that allows you to select images from your computer.
When you select an image, it will then appear in a new control on your form.
So we need a place on our form where we can store images. We’ll use a Picture
Have a look at the Toolbox on the left hand side of Visual C#. Under Common
Controls, locate PictureBox:
Once you’ve select the PictureBox tool. Click on your form once to add a new
PictureBox control. Your form should then look like this:
Once you’ve select the PictureBox tool. Click on your form once to add a new PictureBox control. Your form should then look like this:
The PictureBox control is blank when you first add one. To add an image to
it at Design Time, have a look at the Properties Window. Locate the Image
Click the button with the three dots on it to see a dialogue box appear:
Click the Import button at the bottom and you’ll see a standard Open dialogue
box. Search your hard drive for a suitable image. Because you have “Project
resource file” selected, C# will copy the image to a folder in your project.
(This is handy if you want to send your programme to anyone else.)
In the image below, we’ve gone for a picture of a planet:
Click OK and you’ll be taken back to your form:
Notice that the image is too big for the PictureBox. Locate the SizeMode
property in the Properties Window:
As you can see, there are a few to choose form. Select AutoSize, and
the PictureBox will automatically stretch to the size of your image:
If you run your programme, you’ll see the image appear on the form. It won’t
have a border, though. If you want a border, explore the BorderStyle
Property of your PictureBox control.
In the next part, you’ll see how to add an Open File dialogue box to a project,
allowing you to select any image you want.
Kaynak : https://www.homeandlearn.co.uk/csharp/csharp_s4p8.html ‘sitesinden alıntı