frmcollection.frm

远程访问sql server 的源码

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "集合测试"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5970
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   5970
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton cmdName 
      Caption         =   "按名称访问"
      Height          =   495
      Left            =   3840
      TabIndex        =   7
      Top             =   2280
      Width           =   1455
   End
   Begin VB.CommandButton cmdIndex 
      Caption         =   "按序号访问"
      Height          =   495
      Left            =   2160
      TabIndex        =   6
      Top             =   2280
      Width           =   1335
   End
   Begin VB.TextBox txtInput 
      Height          =   375
      Left            =   2640
      TabIndex        =   5
      Text            =   "txtInput"
      Top             =   1440
      Width           =   1335
   End
   Begin VB.TextBox Text3 
      Height          =   375
      Left            =   3120
      TabIndex        =   3
      Text            =   "Text3"
      Top             =   240
      Width           =   1215
   End
   Begin VB.TextBox Text2 
      Height          =   375
      Left            =   1800
      TabIndex        =   2
      Text            =   "Text2"
      Top             =   240
      Width           =   975
   End
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   240
      TabIndex        =   1
      Text            =   "Text1"
      Top             =   240
      Width           =   1095
   End
   Begin VB.CommandButton cmdClear 
      Caption         =   "清空文本框"
      Height          =   495
      Left            =   360
      TabIndex        =   0
      Top             =   2280
      Width           =   1455
   End
   Begin VB.Label lblInput 
      Caption         =   "输入文本框序号或名称："
      Height          =   375
      Left            =   240
      TabIndex        =   4
      Top             =   1440
      Width           =   2055
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim colTextBoxes As New Collection

Private Sub cmdClear_Click()
    Dim ctlItem As Control
    
    For Each ctlItem In colTextBoxes
        ctlItem.Text = ""
    Next ctlItem
End Sub

Private Sub cmdIndex_Click()
    On Error GoTo err
    'MsgBox colTextBoxes.Item(CInt(Trim(txtInput.Text))).Text
    MsgBox colTextBoxes(CInt(Trim(txtInput.Text))).Text
    Exit Sub
err:
    MsgBox err.Description
End Sub

Private Sub cmdName_Click()
    On Error GoTo err
    'MsgBox colTextBoxes![Text2].Text '用![]来访问集合成员也是可以的
    '只是，此时[]内的内容不能有双引号，必须是特定的Key
    
    '下面两条语句，通过()和特定的Key来访问集合成员，省略Item关键字和不
    '省略有同样的效果
    'MsgBox colTextBoxes.Item(Text2).Text
    'MsgBox colTextBoxes(Text2).Text
    
    '下面两条语句是更加灵活的方式，通过变量传递Key，从而实现访问集合成员
    'MsgBox colTextBoxes.Item(Trim(txtInput.Text)).Text
    MsgBox colTextBoxes(Trim(txtInput.Text)).Text
    Exit Sub
err:
    MsgBox err.Description
End Sub

Private Sub Form_Initialize()
    Dim ctlItem As Control
    For Each ctlItem In Me.Controls
        '集合中只加入文本框控件
        If TypeName(ctlItem) = "TextBox" Then
            colTextBoxes.Add ctlItem, ctlItem.Name
        End If
    Next ctlItem
    
End Sub