如何在C＃中从资源文件中设置面板的背景图像？

Question

I want to change the background image of a panel in a C# Windows Forms application. The image I want to set as the background is located in a resource folder in Solution Explorer . How do I use it in code?

I tried this:

panel1.BackgroundImage = Properties.Resources.Chalkboard; 

But it didn't work.

Answer 1

I tried the same code like you did, and it works fine when I hit a button.

private void pnlBgBtn_Click(object sender, EventArgs e)
{
    panel1.BackgroundImage = Properties.Resources.image;
}

The name 'image' in 'Properties.Resources.image' should be the name you gave to the image. The right name of the image should be the name shown in your project properties under project-proje.

Answer 2

properties.Resources类不会将每个资源作为图像返回，因此您必须像这样将图像应用于图像

panel1.BackgroundImage = (Image)(Properties.Resourses.Chalkboard);

Answer 3

You can try this out:

 Bitmap bmp = new Bitmap(System.Reflection.Assembly.GetEntryAssembly().
    GetManifestResourceStream("MyProject.Resources.myimage.png"));

 panel1.BackgroundImage = bmp;

Answer 4

If you want to set the background image of a panel on page load then you have to write this code:

private void panel1_Paint(object sender, PaintEventArgs e)
{
    Assembly asm = Assembly.GetExecutingAssembly();
    Bitmap backgroundImage = new Bitmap(asm.GetManifestResourceStream("Image913.jpg"));

    e.Graphics.DrawImage(
        backgroundImage, 
        this.ClientRectangle,
        new Rectangle(0, 0, backgroundImage.Width, backgroundImage.Height),
        GraphicsUnit.Pixel);
}

If you want set the image except the panel, load use this code:

Bitmap bmp = new Bitmap(System.Reflection.Assembly.GetEntryAssembly().
GetManifestResourceStream("MyProject.Resources.photo0018.jpg.png"));

panel1.BackgroundImage = bmp;

Answer 5

You can create an icon resource in Properties project folder. When you opened Properties click on Resources.resx and there Add Resource->Add New Icon menu items. This will create an icon. You can also load an icon from an existing file into the resource, in this case the icon will be built in your executable. So, when your icon added as a resource it will be given some name.