Form extension in C #

Question

For my application, I need several forms. These shapes should have a certain picture and should have a white background color.

Instead of creating a standard form in VisualStudio and editing each one to have these specifications, is there a way to create my own form that I can use every time? Having expanded it, perhaps?

Thanks in advance.

Answer 1

Be careful with inheritance combined with the visual designer of the studio. If you are not a "friend" with all the attributes associated with the designer ( BrowsableAttribute, DefaultValueAttribute, ...) and support elements (such as MyProperty, ShouldSerializeMyProperty(), ResetMyProperty()), an attempt to re-use code and safe time may cause a headache.

If you can, use composition instead of inheritance. I have a lot of experience developing a form in the designer and creating panels for the "content" controls.

And content controls can be inherited from usercontrol, and you can also design them in visual studio designer.

After that, you can simply combine any predefined form with any predefined control.

A simple example of the case you described:

/// <summary>
/// Form with "skeleton" common for your application.
/// </summary>
public partial class FormWithPicture : Form {
    private Control content;
    /// <summary>
    /// The control which should be used as "main" content of this form.
    /// </summary>
    public Control Content {
        get { return this.content; }
        set {
            this.content = value;
            // the "panel1" is the container of the content
            this.panel1.Controls.Clear();
            if (null != value) {
                this.panel1.Controls.Add(value);
            }
        }
    }

    public FormWithPicture() {
        InitializeComponent();
    }
}

// somewhere else
new FormWithPicture {
    Content = new ContentControl_A()
}.Show();

Answer 2

.

- , .

public class MyBaseForm : Form

, .

, , , .

public class MyForm1 : MyBaseForm

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