VB6+ADO+ListView数据库分页显示
作者：unknown 更新时间： 2005-05-02
Dim link1 As New ADODB.Connection
Dim rs As New ADODB.Recordset
Dim page As Integer
Dim pubdatapath As String
Sub opendatabase(datapath As String) '打开数据库函数
page = 1 '首次定义打开时的页码为1
If link1.State = 1 Then '如果以连接过，则关闭，初始化下次事务
link1.Close: list2.ListItems.Clear:
list2.ColumnHeaders.Clear: c.Clear:
list1.ListItems.Clear
End If
link1.ConnectionString =
"Provider=microsoft.jet.oledb.4.0;data source=" &
datapath
link1.Open
pubdatapath = datapath
Set biaoming = link1.OpenSchema(adSchemaColumns)
'创建数据库记录集
tablename = ""
Do Until biaoming.EOF
If biaoming("table_name") <> tablename Then '列出所有表
tablename = biaoming("table_name")
list1.ListItems.Add , , tablename
End If
biaoming.MoveNext
Loop
Set biaoming = Nothing
menu1.Enabled = True
list1_MouseUp 1, 0, 10, 10
End Sub
Private Sub Command1_Click() '打开数据库
d.DialogTitle = "打开一个数据库文件进行浏览"
d.InitDir = App.Path
d.FileName = ""
d.Filter = "Access数据库(mdb后缀,推荐格式) *.mdb"
d.ShowOpen
If d.FileName = "" Then Exit Sub
opendatabase d.FileName
End Sub
Private Sub Command4_Click()
str1 = InputBox("请输入一个1-5000之间的数字", "重设", Text1.Text)
If str1 = Text1.Text Or str1 = "" Then Exit Sub
If IsNumeric(str1) = False Then Exit Sub
If str1 > 5000 Or str1 < 1 Then Exit Sub
Text1.Text = str1
If list1.ListItems.Count = 0 Then Exit Sub Else
list1_MouseUp 1, 0, 10, 10
End Sub
Private Sub down_Click() '功能，下一页
page = page + 1: list1_MouseUp 1, 0, 10, 10
End Sub
Private Sub findstr_Click() '查询数据
If InStr(Text2.Text, "'") <> 0 Then MsgBox
"查询时关键字不允许包含 ' 符号", vbCritical, "无效字符": Exit Sub
If rs.State = 1 Then rs.Close
rs.Open "select " & c.Text & " from " &
list1.SelectedItem.Text & " where " & c.Text & " like
'%" & Text2.Text & "%'", link1, adOpenStatic,
adLockReadOnly
If rs.EOF Then MsgBox "没有符号条件的记录,请从新查找", vbCritical,
"未发现记录": Exit Sub
Do While Not rs.EOF
i = i + 1
str1 = str1 & i & " ： " & rs(0) & vbCrLf
rs.MoveNext
Loop
MsgBox str1, vbExclamation, "查询结果 - " & rs.RecordCount
& "匹配"
End Sub
Private Sub Form_Resize()
list1.ColumnHeaders(1).Width = list1.Width - 80
list2.Width = Me.ScaleWidth - list2.Left - 30
list1.Height = Me.ScaleHeight - list1.Top - 30
list2.Height = Me.ScaleHeight - (Me.ScaleHeight -
down.Top) - 150
End Sub
Private Sub Form_Unload(Cancel As Integer)
If rs.State = 1 Then rs.Close
If link1.State = 1 Then link1.Close
Set rs = Nothing: Set link1 = Nothing
End Sub
Private Sub list1_MouseUp(Button As Integer, Shift As
Integer, x As Single, y As Single) '切换表
On Error Resume Next
If list1.ListItems.Count = 0 Then Exit Sub
If rs.State = 1 Then rs.Close
list2.ListItems.Clear: list2.ColumnHeaders.Clear:
c.Clear
rs.Open "select * from " & list1.SelectedItem.Text,
link1, adOpenStatic, adLockReadOnly
If Err.Number <> 0 Then
MsgBox "该数据表不能支持的游标模式", vbCritical, "不规则的格式": Exit Sub
End If
rs.PageSize = Text1.Text
rslen = rs.RecordCount
If rs.PageCount < page Then page = 1
Label3.Caption = "共" & rslen & "条记录,共" & rs.PageCount
& "页,当前页码 " & page
If rs.PageCount > page Then down.Enabled = True Else
down.Enabled = False
If page <> 1 Then up.Enabled = True Else up.Enabled =
False
Set ziduan = rs.Fields '定义字段记录集
For i = 0 To ziduan.Count - 1
list2.ColumnHeaders.Add , , ziduan(i).Name '根据字段指定视图列
c.AddItem ziduan(i).Name
rs.MoveFirst '记录到尾后填充下一列
rs.AbsolutePage = page '定义记录集的绝对页码
For r = 0 To rs.PageSize - 1
If rs.EOF Then Exit For
rstext = rs(i)
If i = 0 Then '首次直接填充第一列
list2.ListItems.Add , , rstext
Else '非首次填充下一下
If rstext <> Empty Then list2.ListItems(r +
1).ListSubItems.Add , , rstext Else list2.ListItems(r +
1).ListSubItems.Add , , ""
End If
rs.MoveNext
Next
Next
If c.ListCount <> 0 Then c.ListIndex = 0:
findstr.Enabled = True Else findstr.Enabled = False
Set ziduan = Nothing
End Sub
Private Sub menu01_Click(Index As Integer)
Select Case Index
Case 1: '建新表演示
str1 = 1
For i = 1 To list1.ListItems.Count
If InStr(list1.ListItems(i).Text, "新建表") = 1 Then str1
= str1 + 1
Next
link1.Execute "create table 新建表" & str1 & "(会员名
Text,密码 Varchar(8),年龄 int not null,经验值 " & _
"integer,加入日期 DateTime null)"
link1.Execute "insert into 新建表" & str1 &
"(会员名,密码,年龄,经验值,加入日期) values ('风云舞','12345678'" & _
",18,365,'" & Now & "')"
link1.Execute "insert into 新建表" & str1 &
"(会员名,密码,年龄,经验值,加入日期) values ('Lshdic','87654321'" & _
",18,365,'" & Now & "')"
opendatabase pubdatapath '刷新重装载列表
Case 2: '刷新——重装载
opendatabase pubdatapath
Case 3: '删除
If rs.State = 1 Then rs.Close
link1.Execute "Drop table " & list1.SelectedItem.Text
opendatabase pubdatapath
Case 4: '表属性
If rs.State = 1 Then rs.Close
rs.Open "select * from " & list1.SelectedItem.Text,
link1, adOpenStatic, adLockReadOnly
For i = 0 To rs.Fields.Count - 1
str1 = str1 & rs.Fields(i).Name & ","
str2 = str2 & rs.Fields(i).Type & ","
str3 = str3 & rs.Fields(i).ActualSize & ","
str4 = str4 & rs.Fields(i).DefinedSize & ","
Next
MsgBox "包含字段:" & str1 & vbCrLf & vbCrLf & "字段类型:" &
str2 & vbCrLf & vbCrLf & "第一行数据大小:" & _
str3 & vbCrLf & vbCrLf & "每行数据预设容量:" & str4,
vbExclamation, "表属性"
End Select
End Sub
Private Sub Text2_GotFocus()
If Text2.Text = "查找关键字..." Then Text2.Text = ""
End Sub
Private Sub Text2_LostFocus()
If Text2.Text = "" Then Text2.Text = "查找关键字..."
End Sub
Private Sub up_Click() '功能，上一页
page = page - 1: list1_MouseUp 1, 0, 10, 10
End Sub
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