LabVIEW
system.drawing.graphics
Solved!
Hi Bongchan,
Please refer to the attached images. You have to use the .NET functions almost like you would in Visual Basic/C#. Thus, the program is structured like so:
1. Create an instance of the System.Windows.Forms.Form class
2. Register the event Form_Paint that will invoke the callback VI
3. Create a graphics object from the PaintEventArgs passed into the callback VI
4. Create an image object that loads the picture file
5. Call the graphic object's method DrawImage using the image object
Here is the corresponding C# code:
name GDI_Test
{
// Create an instance of the System.Windows.Forms.Form class
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
// Register the event Form_Paint that will invoke the callback [Function]
private void Form1_Paint(object sender, PaintEventArgs e)
{
// Create a graphics object from the PaintEventArgs passed into the callback VI
Graphics g = e.Graphics;
// Create an image object that loads the picture file
Image test = Image.FromFile("C:\\test.png" );
// Call the graphic object's method DrawImage using the image object
g.DrawImage(test, 0, 0);
}
}
}
Steps 1 - 2:
Automatically create the callback VI by right-clicking on the VI Ref and selecting "Create Callback VI":
Steps 3 - 5:
