06 win forms

6. WinForms: GUI Programming in .NET

Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object]

Event-driven applications ,[object Object],[object Object],[object Object],[object Object],GUI App

GUI-based events ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Code-behind ,[object Object],[object Object],[object Object]

Call-backs ,[object Object],[object Object],[object Object]

Visual Studio .NET (VS.NET) ,[object Object],[object Object],[object Object]

Basic operation ,[object Object],[object Object],[object Object],[object Object],[object Object],design run break

Example: a windowing application ,[object Object],[object Object],[object Object],[object Object],[object Object]

Step 1 ,[object Object],[object Object]

Step 2 — GUI design ,[object Object],[object Object],[object Object],[object Object]

GUI design cont’d… ,[object Object],[object Object],[object Object],[object Object]

Step 3 — code design ,[object Object],[object Object],[object Object]

Step 4 — run mode ,[object Object]

Working with Visual Studio ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

WinForms ,[object Object],[object Object],[object Object],[object Object]

Abstraction ,[object Object],[object Object],System.Windows.Forms.Form CLR Windows OS instance of FCL class object

Form properties ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Form1 form; form = new Form1(); form.WindowState = FormWindowState.Maximized; form.Show();

Form methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],form.Hide(); . . . form.Show();

Form events ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example ,[object Object],private void Form1_Closing (object sender, System.ComponentModel.CancelEventArgs e) { DialogResult r; r = MessageBox.Show("Do you really want to close?", "MyApp", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1); if (r == DialogResult.No) e.Cancel = true; }

Controls ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Abstraction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],object object object object object object

Who creates all these objects? ,[object Object],[object Object],[object Object]

Naming conventions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Labels ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Command buttons ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],private void cmdAdd_Click (...) { int i, j, k; i = System.Convert.ToInt32( this.txtNum1.Text ); j = System.Convert.ToInt32( this.txtNum2.Text ); k = i + j; MessageBox.Show( "Sum = " + k.ToString() ); }

Text boxes ,[object Object],[object Object],[object Object],[object Object]

Text box properties ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Text box events ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

List Boxes ,[object Object],[object Object],[object Object],Customer[] customers; . . // create & fill array with objects... . // display customers in list box foreach (Customer c in customers) this.listBox1.Items.Add(c); // display name of selected customer (if any) Customer c; c = (Customer) this.listBox1.SelectedItem; if (c == null) return; else MessageBox.Show(c.Name);

Just the tip of the iceberg… ,[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

References ,[object Object],[object Object],[object Object],[object Object],[object Object]

06 win forms

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