University of Technology Laser & Optoelectronics Engineering Department Visual basic Lab. List of items

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1 List of items ListBox Control Properties List object.list(index) [= string] List1.List(0) List1.List(1) list ItemData list AddItem list NewIndex List1.AddItem "Judy Phelps" List1.ItemData(List1.NewIndex) = AddItem ItemData NewIndex ListCount True Sorted False 1

2 2 Column object.columns [= number] number Description 0 (Default) Items are arranged in a single column and the ListBox scrolls vertically. 1 to n Items are arranged in snaking columns, filling the first column, then the second column, and so on. The ListBox scrolls horizontally and displays the specified number of columns. 1 2 SHIFT SPACEBAR SPACEBAR SHIFT (UP ARROW, DOWN ARROW, LEFT ARROW, and RIGHT ARROW) SHIFT CTRL 2

3 Description 0 (Default) Multiple selection isn't allowed. 1 Simple multiple selection. A mouse click or pressing the SPACEBAR selects or deselects an item in the list. (Arrow keys move the focus.) 2 Extended multiple selection. Pressing SHIFT and clicking the mouse or pressing SHIFT and one of the arrow keys (UP ARROW, DOWN ARROW, LEFT ARROW, and RIGHT ARROW) extends the selection from the previously selected item to the current item. Pressing CTRL and clicking the mouse selects or deselects an item in the list. =0 ListIndex =0 List1. List1.List(List1.ListIndex) List List 1 ListIndex SelCount Selected Selected True List False List1.ListIndex = 1 List1.Selected(1) = True List1.Selected(1) = False 3

4 Style Style checkbox Style Value Description vblistboxstandard 0 (Default) Standard. The ListBox control displays as it did in previous versions of Visual Basic; That is, as a list of text items. vblistboxcheckbox 1 CheckBox. The ListBox control displays with a checkbox next to each text item. Multiple items in the ListBox can be selected by selecting the checkbox beside them. Events Click, DblClick, MouseDown, MouseUp, MouseMove, DragDrop, KeyDown, KeyUp, KeyPress, GetFocus and LostFocus events Scrool ItemCheck Private Sub List1_ItemCheck(Item As Integer) Move, Refresh, SetFocus and Zorder Methods object.additem item, index Style Methods : Additem 4

5 List1.AddItem "Judy Phelps" X="Judy Phelps" List1.AddItem x "Judy Phelps" x List1.AddItem 1. List1.AddItem "Judy Phelps",2 List1.AddItem 1., Val(2.) object.removeitem index RemoveItem List1.RemoveItem 2 List1.RemoveItem x List1.RemoveItem Val(1.) List1.RemoveItem List1.ListIndex List1.Clear :Clear 5

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7 Project properties Object Property Setting Form1 Form1 ListBox ListBox1 List1 List ممه أن تىضع في حدث تحميل النمىذج ' Cat Dog Camel ListBox2 Sorted ItemData Column Style دزاسة False ' True List2 0 ' 2 0 ' ' 0 ListBox3 List3 CommandButton1 Command1 Append Box1 1 فساغ CommandButton2 Command2 Add Box2 2 فساغ Box3 3 فساغ CommandButton3 Command3 Remove Box4 4 فساغ CommandButton4 Command4 Copy0 CommandButton5 Command5 Copy1 CommandButton6 Command6 Copy2 CommandButton7 Command7 New Selection 7

8 Poject code Private Sub Command1_Click() 'List1.AddItem "lion" ' If 1. <> "" Then List1.AddItem 1. ' List1.ItemData(List1.NewIndex) = 564 Private Sub Command2_Click() ' List1.AddItem "bird", 1 ' If (2. <> "") And (Val(3.) >= 0) And (Val(3.) <= List1.ListCount) Then List1.AddItem 2., Val(3.) 'List1.ItemData(List1.NewIndex) = 738 Private Sub Command3_Click() 'list1.removeitem 2 ' If (Val(4.) >= 0) And (Val(4.) < List1.ListCount) Then List1.RemoveItem Val(4.) Private Sub Command4_Click() List3.Clear ' List3.AddItem List2. ' list3.additem list2.list (list2.listindex ) Command4.Font = List2. ' Private Sub Command5_Click() List3.Clear '' 1 For i = 0 To List2.ListCount - 1 If List2.Selected(i) Then List3.AddItem List2.List(i) 8

9 Private Sub Command6_Click() List3.Clear '' 2 For i = 0 To List2.ListCount - 1 If List2.Selected(i) Then List3.AddItem List2.List(i) Private Sub Command7_Click() For i = 0 To List2.ListCount 1 ' If List2.Selected(i) Then List2.Selected(i) = False Private Sub Form_Load() Dim a ' a = Array("cat", "dog", "camel") List1.Clear For i = 0 To 2 List1.AddItem a(i) For i = 0 To Screen.FontCount 1 ' List2.AddItem Screen.Fonts(i) 9

10 ListBox Project properties Object Property Setting Form1 Form1 CommandButton1 Command11 Add CommandButton2 Command12 Remove Box1 1 ListBox1 List فساغ List1 Ali Muna Huda 0

11 Project code Private Sub Form_Load() ممكه خزن االسماء هنا في القائمة ' x Dim x = Array("Ali", "Muna", "Huda") List1.Clear For i = 0 To 2 List1.AddItem x(i) ممكه وضعها ' 0 = List1.ListIndex Private Sub Command1_Click() If 1. <> "" Then List1.AddItem 1. If List1.ListCount = 1 Then List1.ListIndex = 0 في حالة وضعها في حدث تحميل النمىذج ' Private Sub Command2_Click() أو ممكه إعطاء زقم العنصس المساد حرفه وفحص السقم إذا كان أقل مه List1.ListCount فيتم الحرف 'If List1.ListIndex <> -1 Then List1.RemoveItem List1.ListIndex If List1.ListIndex = -1 Then MsgBox "No item selected or empty list", vbcritical, "Error" Else List1.RemoveItem List1.ListIndex في حالة وضعها في حدث تحميل النمىذج ' 0 = List1.ListIndex If List1.ListCount > 0 Then 1

12 ListBox 99 1 Command Buttons Project properties Object Property Setting Form1 Form1 CommandButton1 cmdave Average CommandButton2 cmdodd Odd CommandButton3 cmdmax Maximum CommandButton4 cmdend End CommandButton5 cmdnew ListBox1 Project code Private Sub Form_Load() For i = 1 To 99 List1.AddItem i 2 New Selection List1 1 'simple

13 Private Sub cmdave_click() Dim sum As Single, n As Integer For i = 0 To List1.ListCount - 1 If List1.Selected(i) Then sum = sum + List1.List(i) n = n + 1 MsgBox "The average is " & sum / n Private Sub cmdend_click() End Private Sub cmdmax_click() Dim m As Integer m = List1. For i = 0 To List1.ListCount - 1 If List1.Selected(i) Then If List1.List(i) > m Then m = List1.List(i) MsgBox "The maximum number is " & m Private Sub cmdnew_click() For i = 0 To List1.ListCount - 1 List1.Selected(i) = False Private Sub cmdodd_click() Dim n As Integer For i = 0 To List1.ListCount - 1 If List1.Selected(i) Then If List1.List(i) Mod 2 <> 0 Then n = n + 1 MsgBox "There are " & n & " Odd numbers" 3

Box.Keyboard Project properties Object Property Setting Form1 Form1 CommandButton1 Command1 Space CommandButton2 Command2 New Line CommandButton3 Command3 Box1 Multiline ScrollBars Clear 1 فساغ True

14 Box.Keyboard Project properties Object Property Setting Form1 Form1 CommandButton1 Command1 Space CommandButton2 Command2 New Line CommandButton3 Command3 Box1 Multiline ScrollBars Clear 1 فساغ True 3 ListBox1 List1 Project code Private Sub Command1_Click() 1. = 1. + " " Private Sub Command2_Click() 1. = 1. + vbcrlf Private Sub Command3_Click() 1. = "" Private Sub Form_Load() For i = Asc("a") To Asc("z") List1.AddItem Chr(i) 4

15 Private Sub List1_Click() 1. = 1. + List1. 5

Lecture Using ListBox and ComboBox Controls In Visual Basic 6: list box

Lecture Using ListBox and ComboBox Controls In Visual Basic 6: list box Lecture 10+11+12 7- Using ListBox and ComboBox Controls In 6: list box A list box displays a list of items from which the user can select one or more items. If the number of items exceeds the number that