可。
Private Sub Form_MouseMove(Button As Integer, Shift As Integer, x As Single, Y As Single)
Line1.Visible = False
Line2.Visible = False
Line3.Visible = False
Line4.Visible = False
Line5.Visible = False
Line6.Visible = False
Line7.Visible = False
Line8.Visible = False
End Sub
鼠标按下的时候设置线条的颜色如下:
Private Sub Label3_MouseDown(Button As Integer, Shift As Integer, x As Single, Y As Single)
Line1.BorderColor = &H808080
Line2.BorderColor = &H808080
Line3.BorderColor = &HE0E0E0
Line4.BorderColor = &HE0E0E0
End Sub
鼠标移动到标签的时候设置线条的颜色如下:
Private Sub Label3_MouseMove(Button As Integer, Shift As Integer, x As Single, Y As Single)
Line1.BorderColor = &HE0E0E0
Line2.BorderColor = &HE0E0E0
Line3.BorderColor = &H808080
Line4.BorderColor = &H808080
Line1.Visible = True
Line2.Visible = True
Line3.Visible = True
Line4.Visible = True
End Sub
(2) 用户类型判断
在数据库中建了一人yonghu表。在添加管理人员时有两种默认级别。管理员、普通用户。管理员拥有对数据库操作的一切权限。普通用户只有普通的查看,数据转换等。没有删除等操作功能。前用户成功登录后,会在主窗体的状态栏中显示出当前用户及其用户类型。
主要代码如下:
设置当前控件连接的数据库
Dim provider As String
Dim datasource As String
provider = "provider=Microsoft.jet.oledb.4.0"
datasource = "data source=" & App.Path & "\DB.mdb"
With Adodc1
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "yonghu"
.Refresh
.Recordset.MoveFirst
End With
对用户进行判断
If Text1.Text = "" Then
MsgBox "请输入用户名!", 48, "提示"
Exit Sub
End If
Adodc1.Recordset.Find "用户='" & Text1.Text & "'"
If Adodc1.Recordset.EOF = False And Text2.Text = Trim(Adodc1.Recordset.Fields("pass")) Then
main.Text1.Text = Adodc1.Recordset.Fields("级别")
main.Text2.Text = Adodc1.Recordset.Fields("用户")
main.Show
Unload Me
Else
Text1.Text = ""
Text2.Text = ""
MsgBox "登录不成功,请重新登录!", 48, "提示"
End If
程序主界面为本软件的显示的核心部分。一切主要操作及显示都通过这里完成。整个界面主要由五部分组成。菜单部分、工具栏、左侧操作栏、右侧显示栏以及状态栏。
①界面效果图如下:
图4.2程序主界面
菜单栏的详见附录内容,这里就不提了。左侧操作栏和右侧显示栏会在下面的内容中做介绍,现在只简单介绍一下工具栏和状态栏,以及主窗体的各个事件。
工具栏主要是由coolbar制作而成。由它制做的工具栏的显示效果会更有立体感一些。这里只列出了几个常用的按钮。其中的添加按钮是用来对公寓住宿人员进行添加,修改也是对所住宿人员进行修改,想要进行修改时必须显示所有记录时才可以进行。在这里值得一提的是删除DataGrid的操作,由于不知道它的当前数据源是哪个,所以在删除前要确定它的数据源,也就是它所链接的adodc1的数据源,或者是其它ado控件对它的数据源进行重新绑定后的数据库表,也有可能是经过一个查询后得到的记录。
②它的实现方法如下所示:
Dim o As Adodc
Set o = DataGrid1.datasource
o.Recordset.Delete
o.Recordset.Update
这里主要是用到了ado对像的方法。用这个方法得到数据源。
下面是整个工具栏运行时代码:
Select Case Button.Index
Case 1
sel.Show 1
Case 3
add.Show 1
Case 5
On Error GoTo next2
Dim s As Adodc
Set s = DataGrid1.datasource
If s.RecordSource = "users" Then
edit.Show 1
End If
next2:
Case 7
On Error Resume Next
Dim o As Adodc
Set o = DataGrid1.datasource
o.Recordset.Delete
o.Recordset.Update
Case 9
back.Show 1
Case 11
With Adodc1
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "users" '
.Refresh
End With
Set DataGrid1.datasource = Adodc1
DataGrid1.Refresh
Call dx
Case 13
Unload Me
End Select
状态栏分四个部分。第一个为固定显示当前所用软件名称及作者。其中第二个和第三部分为动态显示的,它会显示出每次用户登录名称及其管理模式。由上图可以看出,lf为本软件管理员。第四部分为日期与时间的显示。其中第三部分的代码实现如下:
main.Text1.Text = Adodc1.Recordset.Fields("级别")
main.Text2.Text = Adodc1.Recordset.Fields("用户")
StatusBar1.Panels(2).Text = "当前用户:" & Text2.Text
StatusBar1.Panels(3).Text = "用户模式:" & Text1.Text
StatusBar1.Panels(4).Text = Date & " " & Time
'设置普通用户模式
If Text1.Text = "普通用户" Then
yhgl.Visible = False
g1.Visible = False
jlsc.Visible = False
gysz.Visible = False
Toolbar1.Buttons(5).Visible = False
Toolbar1.Buttons(6).Visible = False
Toolbar1.Buttons(7).Visible = False
Toolbar1.Buttons(8).Visible = False
End If
主窗体在程序运行中会遇到不断改变其大小,最小化,最大化,以及用鼠标来改变,这里需要在窗体的Resize事件中添加代码,让程序中用到的各个控件随时可以适应窗体改变后的大小,在这里改变的控件主要有DataGrid、TreeView系列及Frame控件、StatusBar。下面就是设置它们大小的程序代码:
DataGrid1.Width = main.Width - SSTab1.Width
DataGrid1.Height=main.Height - StatusBar1.Height - CoolBar1.Height - 750
SSTab1.Height = main.Height - StatusBar1.Height - CoolBar1.Height - 750
Frame1.Height = main.Height - StatusBar1.Height - CoolBar1.Height - 1200
Frame2.Height = main.Height - StatusBar1.Height - CoolBar1.Height - 1200
Frame3.Height = main.Height - StatusBar1.Height - CoolBar1.Height - 1200
TreeView1.Height=main.Height - StatusBar1.Height - CoolBar1.Height - 1500
TreeView2.Height=main.Height - StatusBar1.Height - CoolBar1.Height - 1500
TreeView3.Height=main.Height - StatusBar1.Height - CoolBar1.Height - 1500
Y = main.Width
x = (Y - z) / 4
StatusBar1.Panels(1).Width = u + x
StatusBar1.Panels(2).Width = v + x
StatusBar1.Panels(3).Width = w + x
StatusBar1.Panels(4).Width = m + x
这个软件的主要部分都在这里运行、查看,所以在主窗体的load事件里要把所用的到的东西都要加载进来,例如所在程序运行时所用到的表,左侧treeview部分树形显示的初始化。在这里几乎用到了所有的表,如下所示:
provider = "provider=Microsoft.jet.oledb.4.0"
datasource = "data source=" & App.Path & "\DB.mdb"
With Adodc1
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "users" '
.Refresh
End With
With Adodc2
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "gongyu"
.Refresh
End With
With Adodc3
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "class"
.Refresh
End With
With Adodc4
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "weisheng"
.Refresh
End With
With Adodc5
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
End With
With Adodc6
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "dengji"
.Refresh
End With
With Adodc7
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "qinshi"
.Refresh
End With
With Adodc9
.Mode = adModeReadWrite
.ConnectionString = provider & ";" & datasource
.CommandType = adCmdTable
.RecordSource = "zichan"
.Refresh
End With
treeview部分树形显示的初始化在这里已经做了几个过程,调用即可。
4.3.1用户管理
①界面效果图
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