[C#] MenuStrip, SaveFileDialog, OpenFileDialog, PcitureBox, Class Library (.NET Framework) + Custom Control

1. MenuStrip

• Shortcut using Alt: “&Save” = Save (Alt + S) → Navigating with keyboard
• Shortcut using Ctrl: ShortcutKeys Property

C# Windows Form MenuStrip

2. SaveFileDialog

• OpenDialogbox, SaveDialogBox just pass file path
• FileFormat is important! è filename always include Filepath
• Always surround dialog with try-catch

private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            DialogResult dialogResult = dlgSave.ShowDialog();
            switch (dialogResult)
            {
                case DialogResult.None:
                    break;
                case DialogResult.OK:
                    try
                    {
                        string fileName = dlgSave.FileName;
                        int numberOfItems = int.Parse(txtNumverOfItems.Text);
                        // MessageBox.Show(fileName);
                        save(fileName, numberOfItems);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("Error in file save");
                    }
                    break;
                case DialogResult.Cancel:
                    break;
                case DialogResult.Abort:
                    break;
                case DialogResult.Retry:
                    break;
                case DialogResult.Ignore:
                    break;
                case DialogResult.Yes:
                    break;
                case DialogResult.No:
                    break;
                default:
                    break;
            }
        }

3.       OpenFileDialog

• dilogOpen.SafeFileName Property
• InitialDirectory
• Filter Property: “|” separator, *.* technical

4. PictureBox

• Load image
• Image.FromFile(fileName)
• Bitmap class => child of Image class

5. Class Library (.NET Framework) = dll file

• Class Library Project doesn’t have program.cs è Not Executable by itself
• If we build the class library project, it will generate dll file
• Enum : 1. make code readable 2. make dropdown in property!!

Generate User Defined Property

• Auto-implemented getter, but a custom setter? No. You can either define both getter and setter, or have the C# compiler generate both of them for you," https://codeasy.net/lesson/properties

Learn C# Properties: Getters and Setters at Intermediate C# Course

6. New project in Class Library

• Bold Project = starter project  (Set as a startup Project)

Set as a startup Project

• If you don’t see WorldClock in Windows form tool box, you can rebuild it.
• You can retrieve the property that you created!
• User Control Property Visibliity: [Browsable(true/false)]
• User Control Property description: [Description]
• User Control Property Category: [Category]

 

7. How to add user control in one solution file

• Add user control like you are adding a class

Tip.

Cw tab tab

Mbox tab tab