Option Compare Database Option Explicit Public a1 As Integer Public idnum As Long Dim rs1 As DAO.Recordset '定义记录集变量 Private Sub Command抽奖1_Click() If a1 = 1 Then a1 = 0 rs1.Close Else a1 = 1 Set rs1 = CurrentDb.OpenRecordset("奖励表", dbOpenTable) End If End Sub Private Sub Command抽奖2_Click() If a1 = 1 Then a1 = 0 rs1.Close DoCmd.SetWarnings (False) Dim del_sql As String del_sql = "Delete From 奖励表 Where ID=" & idnum DoCmd.RunSQL del_sql Else a1 = 1 Set rs1 = CurrentDb.OpenRecordset("奖励表", dbOpenTable) End If End Sub Private Sub Command重置_Click() DoCmd.SetWarnings (False) Dim del_sql As String del_sql = "Delete From 奖励表" DoCmd.RunSQL del_sql Dim update_sql As String update_sql = "insert into 奖励表 select * From 奖励备份表" DoCmd.RunSQL update_sql End Sub Sub 抽奖1() On Error GoTo 抽奖完成 If a1 = 1 Then Dim Record_count As Long Record_count = rs1.RecordCount Dim rnd_i As Long Randomize rnd_i = Int((Record_count - 1 + 1) * Rnd + 1) rs1.MoveFirst rs1.Move (rnd_i - 1) Me.奖励 = rs1.Fields("奖励名称").Value idnum = rs1.Fields("ID").Value End If Exit Sub 抽奖完成: MsgBox "抽奖完成，重新抽奖可重置" a1 = 0 rs1.Close End Sub Private Sub Form_Timer() If a1 = 1 Then Call 抽奖1 End If End Sub打开窗体之后点击抽奖按钮，但是奖励框中不显示奖励名称是为什么

根据提供的代码，可能是因为在抽奖1()子过程中，没有将抽中的奖励名称赋值给奖励框的属性。可以在抽奖1()子过程中添加一行代码，将抽中的奖励名称赋值给奖励框的属性，例如：

Me.奖励 = rs1.Fields("奖励名称").Value

其中，"奖励"是奖励框的属性名称，需要根据实际情况进行修改。

另外，建议在使用记录集变量时，先判断记录集是否已经打开，以避免出现异常情况。例如，在Command抽奖2_Click()子过程中，可以添加以下代码：

If rs1.State = adStateOpen Then
    rs1.Close
End If

这样可以确保每次操作前记录集都已经关闭。

相关问题

Option Explicit Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long Private Type POINTAPI X As Long Y As Long End Type Dim dc As Long Dim p As POINTAPI Public data As Long Sub Form_Load() Timer1.Interval = 200 Timer1.Enabled = True MSComm1.CommPort = 1 MSComm1.Settings = "9600,E,7,1" MSComm1.InputMode = comInputModeText MSComm1.InBufferSize = 1024 MSComm1.PortOpen = True End Sub Private Sub Timer1_Timer() GetColorUnderCursor GetColorUndersCursor End Sub Private Sub GetColorUnderCursor() GetCursorPos p Cls AutoRedraw = True dc = GetDC(0) Text3.Text = GetPixel(dc, p.X, p.Y) ReleaseDC 0, dc End Sub Private Sub GetColorUndersCursor() GetCursorPos p dc = GetDC(0) Dim color As Long color = GetPixel(dc, p.X, p.Y) ReleaseDC 0, dc Dim data As String If color = 8421504 Then data = Chr(2) & "110C8020200" & Chr(3) & "34" Text2.Text = data MSComm1.Output = data Dim receiveData As String receiveData = MSComm1.Input If receiveData <> "" Then Dim hexData As String Dim i As Integer For i = 1 To Len(receiveData) hexData = hexData & Hex(Asc(Mid(receiveData, i, 1))) Next i Text1.Text = hexData End If End If End Sub优化此代码，要求文本框text1和text2能够及时刷新内容

首先，可以将获取颜色和发送数据的代码分离成两个独立的函数，以便更好地管理和优化。同时，使用DoEvents函数可以在代码执行时允许Windows处理其他事件，以便实现及时刷新文本框内容。

下面是优化后的代码：

Option Explicit

Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long

Private Type POINTAPI
    X As Long
    Y As Long
End Type

Dim p As POINTAPI
Dim dc As Long

Sub Form_Load()
    Timer1.Interval = 200
    Timer1.Enabled = True
    
    MSComm1.CommPort = 1
    MSComm1.Settings = "9600,E,7,1"
    MSComm1.InputMode = comInputModeText
    MSComm1.InBufferSize = 1024
    MSComm1.PortOpen = True
End Sub

Private Sub Timer1_Timer()
    GetColorUnderCursor
    SendData
    DoEvents
End Sub

Private Sub GetColorUnderCursor()
    GetCursorPos p
    dc = GetDC(0)
    Dim color As Long
    color = GetPixel(dc, p.X, p.Y)
    ReleaseDC 0, dc
    
    Text3.Text = color
End Sub

Private Sub SendData()
    GetCursorPos p
    dc = GetDC(0)
    Dim color As Long
    color = GetPixel(dc, p.X, p.Y)
    ReleaseDC 0, dc
    
    If color = 8421504 Then
        Dim data As String
        data = Chr(2) & "110C8020200" & Chr(3) & "34"
        Text2.Text = data
        MSComm1.Output = data
        
        Dim receiveData As String
        receiveData = MSComm1.Input
        If receiveData <> "" Then
            Dim hexData As String
            Dim i As Integer
            For i = 1 To Len(receiveData)
                hexData = hexData & Hex(Asc(Mid(receiveData, i, 1)))
            Next i
            Text1.Text = hexData
        End If
    End If
End Sub

注意，上述代码中的SendData函数中重复定义了一个局部变量data，在函数结束时并没有被使用。我将其删除了。同时，由于题目中没有提供文本框text3的刷新要求，所以我仅在GetColorUnderCursor函数中更新了它的内容。

springboot矩阵变量报错This application has no explicit mapping for /error, so you are seeing this as a fallback.

这个错误提示表明你的应用程序没有为/error显式映射，因此你看到了这个回退。这通常是由于请求的URL没有匹配到任何已定义的路由导致的。在你的情况下，可能是由于矩阵变量的问题导致的。矩阵变量是一种在URL路径中传递参数的方法，它们以分号分隔。如果你的应用程序中使用了矩阵变量，但没有正确配置路由来处理它们，就会出现这个错误。你可以检查你的代码，确保你正确地定义了路由来处理矩阵变量。如果你仍然无法解决问题，你可以尝试在启动类上添加注释@SpringBootApplication(scanBasePackages="controller")，指定你的controller的位置。