frmusrquery.frm

<Visual Basic 数据库开发实例精粹（第二版）>一书首先介绍了Visual Basic(简称VB)开发的技巧和重点技术

VERSION 5.00
Begin VB.Form FrmUsrQuery 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "管理员信息查询"
   ClientHeight    =   4800
   ClientLeft      =   45
   ClientTop       =   360
   ClientWidth     =   7740
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MDIChild        =   -1  'True
   ScaleHeight     =   4800
   ScaleWidth      =   7740
   Begin VB.ListBox ListUsrResult 
      Height          =   2400
      Left            =   240
      Sorted          =   -1  'True
      TabIndex        =   4
      Top             =   1800
      Width           =   7335
   End
   Begin VB.CommandButton CmdQuery 
      Caption         =   "查询"
      Height          =   375
      Left            =   3720
      TabIndex        =   2
      Top             =   720
      Width           =   975
   End
   Begin VB.TextBox TextID 
      Height          =   375
      Left            =   1440
      TabIndex        =   1
      Top             =   720
      Width           =   2055
   End
   Begin VB.CommandButton CmdCancel 
      Cancel          =   -1  'True
      Caption         =   "返回"
      Height          =   375
      Left            =   6600
      TabIndex        =   0
      Top             =   4320
      Width           =   975
   End
   Begin VB.Label Label3 
      Caption         =   "查询结果："
      BeginProperty Font 
         Name            =   "楷体_GB2312"
         Size            =   12
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   375
      Left            =   120
      TabIndex        =   6
      Top             =   1320
      Width           =   1455
   End
   Begin VB.Label Label2 
      Caption         =   "请输入需要查询的管理员ID："
      BeginProperty Font 
         Name            =   "楷体_GB2312"
         Size            =   12
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   375
      Left            =   120
      TabIndex        =   5
      Top             =   120
      Width           =   6975
   End
   Begin VB.Label Label1 
      Caption         =   "管理员ID："
      BeginProperty Font 
         Name            =   "楷体_GB2312"
         Size            =   12
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00FF0000&
      Height          =   375
      Left            =   120
      TabIndex        =   3
      Top             =   720
      Width           =   1575
   End
End
Attribute VB_Name = "FrmUsrQuery"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub CmdCancel_Click()   '取消
    Unload Me
End Sub

'管理员信息查询
Private Sub CmdQuery_Click()
Dim str As String

    '清空列表
    Me.ListUsrResult.Clear
    '检验输入内容
    If Len(Trim(Me.TextID.Text)) <= 0 Then
        MsgBox "请输入管理员ID！"
        Exit Sub
    ElseIf Len(Trim(Me.TextID.Text)) > 16 Then
        MsgBox "您输入的ID过长！"
        Exit Sub
    End If
    
    '生成要发送的数据 = Usr，03，Usr_ID
    str = "Usr," & "03," & Me.TextID.Text
    '检验sock连接并向服务器发送数据
    If MDIFrm.SockToSvr.State <> sckConnected Then
        MsgBox "还没有连接数据库，不能发送请求！"
        Exit Sub
    End If
    MDIFrm.SockToSvr.SendData str
    
End Sub