MySQL中如何实现Top N及M至N段的记录查询？
2007-11-11 14:17:46 来源：WEB开发网如何实现将vsflexgrid中修改的数据反馈到数据库中？
Private Sub vsflexgrid1_AfterEdit(ByVal Row As Long, ByVal Col As Long)
rs.MoveFirst '//rs为记录集
rs.Move vsflexgrid1.Row - 1
rs.Edit
If vsflexgrid1.text = "" Then
rs.Fields(vsflexgrid1.Col - 1) = Null
Else
rs.Fields(vsflexgrid1.Col - 1) = vsflexgrid1.text
End If
rs.Update
end sub
一、增加记录使用for来循环表格行。
for i=1 to grid1.rows-1
with rs
.addnew
.fileds(o)=grid1.textmariy(i,0)
.fileds(1)=grid1.textmariy(i,1)
.fileds(2)=grid1.textmariy(i,2)
.fileds(3)=grid1.textmariy(i,3)
.update
end with
next
二、添加行
grid1.additem row
三、删除当前行
with grid1
i=.row
.removeitem i
end with
四、要显示下拉框，可以使用vsflexgrid中列绑定功能
grid1.colcombolist(1)＝grid.buildcombolist(rs,"商品名称")
跟楼上的相比,仅仅是datamode不一样(2-flexDMBoundBatch)
但这样做的优势是非常明显的:可以撤销包括新增删除在内的所有操作,按保存键才写入数据库
Private Sub CmdDel_Click()
If fg.Row <> 0 Then fg.RemoveItem (fg.Row)
fg.Refresh
End Sub
Private Sub CmdAdd_Click()
On Error Resume Next
Adodc1.Recordset.AddNew
If Err.Number <> 0 Then MsgBox Err.Description
End Sub
Private Sub CmdUpdate()
Adodc1.Recordset.UpdateBatch adAffectAllChapters
End Sub
Private Sub CmdCancel_Click()
Adodc1.Recordset.CancelBatch
fg.DataRefresh
End Sub
Private Sub Form_Load()
Adodc1.ConnectionString = "FILE NAME=" & App.Path & "\conn.dsn"
Adodc1.LockType = adLockBatchOptimistic
Adodc1.RecordSource = "Your_Tablename"
Set fg.DataSource = Adodc1
End Sub
1、打印vsflexgrid可以使用vsprinter打印控件。跟vsflexgrid配套使用效果不错。
2、导出EXECL，可以使用grid.savegrid的方法。
用savegrid的方法 ，在导出execl时，如果碰到类似于银行帐号的列如：“６４６５４５６６６５”，导到ＥＸＥＣＬ中就不这样显示了，这个问题还不知道怎么解决？？
另外也可以写代码（这个方法比较实用，但慢一些）：
Dim excelApp As Excel.Application
Set excelApp = New Excel.Application
On Error Resume Next
If excelApp Is Nothing Then
Set excelApp = CreateObject("Excel.application")
If excelApp Is Nothing Then
Exit Sub
End If
End If
excelApp.Visible = True
Me.MousePointer = vbHourglass
excelApp.Workbooks.Add
With excelApp.ActiveSheet
Dim i As Integer, j As Integer
For i = 1 To Grid1.rows
For j = 1 To Grid1.Cols
.Cells(i, j).value ="'"& Grid1.TextMatrix((i - 1), (j - 1))'加上“'”号则可以解决上面savegrid中银行帐号的导出问题。
Next j
DoEvents
Next i
End With
Me.MousePointer = vbDefault
Set excelApp = Nothing
End Sub
EXCEL同Vsflexgrid通过
最近很多的朋友,都想知道EXCEL怎样同VSflexgrid交换数据。
实际上，利用“复制”、“粘贴”菜单即可实现。具体如下：
（1）在Vsflexgrid上弹出右键菜单
Private Sub grid1_MouseDown(Button As Integer, Shift As Integer, X As Single, y As Single)
if Button = 2 Then PopupMenu mnutccd
End Sub
（2）设置各菜单的内容
A 复制
Clipboard.Clear
Clipboard.SetText grid1.Clip
B 剪切
Dim rowc As Long
Dim rowz As Long
Dim colc As Long
dim colz As Long
dim i as long
dim s as long
If grid1.Rows = 1 Then Exit Sub
Clipboard.Clear
Clipboard.SetText grid1.Clip
If grid1.RowSel > grid1.row Then
rowc = grid1.row
rowz = grid1.RowSel
Else
rowc = grid1.RowSel
rowz = grid1.row
End If
If grid1.ColSel > grid1.Col Then
colc = grid1.Col
colz = grid1.ColSel
Else
colc = grid1.ColSel
colz = grid1.Col
End If
For i = rowc To rowz
For s = colc To colz
grid1.TextMatrix(i, s) = ""
Next
Next
C 粘贴（精华部分)
Dim i As Long
Dim s As Long
Dim m As Long
Dim t As Long
If grid1.Rows = 1 Then Exit Sub
t = Len(Clipboard.GetText)
If t = 0 Then Exit Sub
For i = 1 To t
If Mid(Clipboard.GetText, i, 1) = Chr(9) Then s = s + 1
If Mid(Clipboard.GetText, i, 1) = Chr(13) Then m = m + 1
Next
If s / (m + 1) + grid1.Col > grid1.Cols - 1 Then
grid1.ColSel = grid1.Cols - 1
Else
grid1.ColSel = s / (m + 1) + grid1.Col
End If
If grid1.row + m > grid1.Rows - 1 Then
grid1.RowSel = grid1.Rows - 1
Else
grid1.RowSel = grid1.row + m
End If
grid1.Clip = Clipboard.GetText
VSFlexGrid 常用属性或方法：
.FixedRows = 1 '固定几行
.FixedCols = 1 '固定几列
.Editable = True '允许修改
.AllowUserResizing = flexResizeBoth '可调整行/列
.FocusRect = flexFocusNone '无虚框
.SelectionMode = flexSelectionListBox '焦点选中样式
.BackColor = RGB(255, 255, 255) '单元背景色
.BackColorSel = vbBlue '单元选择色
.BackColorFixed = RGB(208, 192, 160) '固定单元色
.BackColorAlternate = RGB(255, 250, 230) '间隔行背景色
.GridColor = RGB(245, 240, 210) '单元线条色
.ForeColor = RGB(0, 0, 0) '单元前景色(字符色)
.RowHeightMin = 260 '最小行高
.RowHeightMax = 800 '最大行高
.ColHeightMin = 50 '最小列宽
.ColHeightMax = 3000 '最大列宽
.ColWidth(Col) = 1000 '指定列宽
.RowHeight(Row) = 260 '指定行高
.TextMatrix(Row,Col) = "Text" '指定单元字符
.Text = "Text" '选定单元字符
.MergeCol(Col) = True '允许合并列
.MergeRow(Row) = True '允许合并行
.MergeCells = 0|1|2|3|4|5|6 '合并选项
.Cell(选项准则, Row1, Col1, Row2, Col2) '选择部分的相应准则值
.EditCell '当移动到当前单元时自动选择
.EditSelStart '移动到单元时的光标位置
.MousePointer '设置对象的鼠标指针样式 O.A = 0 到 15|99
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
几个特殊的属性方法的使用：
FormatString 属性：管道符格式化字符串示例：
下面定义对齐方式同字意，列宽窄同距离
VSG1.FormatString = "^ 中 |< 左 |> 右 |> 右 |^ 中 "
+++++++++++++++++++++++++
搜索(查找)表格中符合条件的行：
FindRow 属性：该属性返回一个行值
MsgBox VSG1.FindRow(关键词,[指定行],[指定列],[敏感],[精度])
关键词：String，表示要搜索的字符串
指定行/指定列：Long，表示只在指定的行或列中找
敏感：Boolean，
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
'限制只能在指定列输入(这里默认倒数第2列)
Private Sub VSG1_BeforeRowColChange(ByVal OldRow As Long, _
ByVal OldCol As Long, ByVal NewRow As Long, _
ByVal NewCol As Long, Cancel As Boolean)
VSG1.Editable = flexEDKbd
If VSG1.Redraw <> flexRDNone And NewCol <> VSG1.Cols - 2 Then
Cancel = True
VSG1.Select NewRow, VSG1.Cols - 2
End If
End Sub
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
限制不能编辑某些列：(这里限制第1列和第3列)
Private Sub VSG1_RowColChange()
If VSG1.Col = 1 Or VSG1.Col = 3 Then
VSG1.FocusRect = flexFocusNone
VSG1.Editable = flexEDNone
'SendKeys "{TAB}"
Else
VSG1.Editable = flexEDKbd
SendKeys "{ENTER}"
End If
End Sub
或：
Private Sub VSG1_RowColChange()
If VSG1.Col = 1 Or VSG1.Col = 3 Then
SendKeys "{RIGHT}"
Else
SendKeys "{ENTER}"
End If
End Sub
或：
Private Sub VSG1_RowColChange()
If VSG1.Col = 1 Or VSG1.Col = 3 Then
VSG1.Editable = flexEDNone
Else
VSG1.Editable = flexEDKbd
VSG1.EditCell '自动选择单元内容
VSG1.EditSelStart = 0[选到最前]|1[选到指定]|Len(VSG1.Text)[选到最后]
End If
End Sub
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
'对齐方式(-1标示所有)
.ColAlignment(-1) = flexAlignLeftCenter|flexAlignCenterCenter|flexAlignRightCenter
示例1：(最后一行的第3列靠右对齐)
VSG1.Select VSG1.Rows - 1, 2
VSG1.CellAlignment = flexAlignRightCenter
示例2：
VSG1.Row = VSG1.Rows - 1: VSG1.Col = 1
VSG1.CellAlignment = flexAlignRightCenter
示例3：
VSG1.Cell(flexcpAlignment, VSG1.Rows - 1, 1, VSG1.Rows - 1, 3) = flexAlignRightCenter
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
本对象拖放：
Private Sub VSG1_MouseDown(Button As Integer, _
Shift As Integer, X As Single, Y As Single)
VSG1.Drag
VSG1.DragIcon = LoadPicture("D:\Icon.ico")
VSG1.DragRow VSG1.RowSel
End Sub
或从其它对象拖：
Private Sub VSG2_MouseDown(Button As Integer, _
Shift As Integer, X As Single, Y As Single)
VSG2.OLEDrag
VSG1.OLEDropMode = flexOLEDropAutomatic
End Sub
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Public Sub VSGridCount(Optional SelRow As Long, Optional SelCol As Long)
Dim X As Long, i As Long
Dim Hj1, Hj2, Hj3 As String
Const A1 = -922337203685477#, A2 = 922337203685477#
On Error GoTo ErrTransact
With frmFG.VSG1
X = .Rows - 1
.MergeCells = flexMergeFree
.MergeRow(X) = True
.Cell(flexcpText, X, 0, X, 1) = "合 计"
If .Rows = 3 Then
.TextMatrix(X, 0) = 0
.Cell(flexcpText, X, 2, X, 14) = " "
.Cell(flexcpText, X, 16, X, 17) = "￥0.00"
Exit Sub
End If
'Hj1 = Val(.Aggregate(flexSTSum, 2, 2, X - 1, 2))
'Hj2 = Val(.Aggregate(flexSTSum, 2, 16, X - 1, 16))
'Hj3 = CurrencyToStr(Hj2)
For i = 2 To X - 2
Hj1 = Hj1 + Val(.TextMatrix(i, 15))
If Val(.TextMatrix(i, 16)) > 0 Then
Hj2 = Hj2 + Val(.TextMatrix(i, 15)) * Val(.TextMatrix(i, 16))
End If
Next i
If Hj2 <= A1 Or Hj2 >= A2 Then
GoTo ErrTransact
End If
Hj3 = CurrencyToStr(Hj2)
.TextMatrix(X, 2) = Hj1
.Cell(flexcpText, X, 3, X, 15) = IIf(Hj3 = "", " ", Hj3)
.Cell(flexcpText, X, 16, X, 17) = Format(Hj2, "￥0.00")
.Cell(flexcpAlignment, X, 2, X, 14) = flexAlignLeftCenter
'.Select X, 3
'.CellAlignment = flexAlignLeftCenter
If SelRow > 1 And SelCol > 0 Then .Select SelRow, SelCol
End With
Exit Sub
ErrTransact:
MsgBox "你输入的数字过大无法计算！请修改！！！"
End Sub
------------------------------------------------
将数字转换为大写金额的函数：
Function CurrencyToStr(ByVal Number As Currency) As String
Number = Val(Trim(Number))
If Number = 0 Then CurrencyToStr = "": Exit Function
Dim str1Ary As Variant, str2Ary As Variant
str1Ary = Split("零 壹 贰 叁 肆 伍 陆 柒 捌 玖")
str2Ary = Split("分 角 元 拾 佰 仟 万 拾 佰 仟 亿 拾 佰 仟 万 拾 佰")
Dim a As Long, b As Long '循环基数
Dim tmp1 As String '临时转换
Dim tmp2 As String '临时转换结果
Dim Point As Long '小数点位置
If Number <= -922337203685477# Or Number >= 922337203685477# Then
Exit Function
End If
tmp1 = Round(Number, 2)
tmp1 = Replace(tmp1, "-", "") '先去掉“-”号
Point = InStr(tmp1, ".") '取得小数点位置
If Point = 0 Then '如果有小数点，最大佰万亿
b = Len(tmp1) + 2 '加2位小数
Else
b = Len(Left(tmp1, Point + 1)) '包括点加2位小数
End If
''先将所有数字替换为中文
For a = 9 To 0 Step -1
tmp1 = Replace(Replace(tmp1, a, str1Ary(a)), ".", "")
Next
For a = 1 To b
b = b - 1
If Mid(tmp1, a, 1) <> "" Then
If b > UBound(str2Ary) Then Exit For
tmp2 = tmp2 & Mid(tmp1, a, 1) & str2Ary(b)
End If
Next
If tmp2 = "" Then CurrencyToStr = "": Exit Function
''〓下面为非正式财务算法，可以去掉〓
For a = 1 To Len(tmp2)
tmp2 = Replace(tmp2, "零亿", "亿零")
tmp2 = Replace(tmp2, "零万", "万零")
tmp2 = Replace(tmp2, "零仟", "零")
tmp2 = Replace(tmp2, "零佰", "零")
tmp2 = Replace(tmp2, "零拾", "零")
tmp2 = Replace(tmp2, "零元", "元")
tmp2 = Replace(tmp2, "零零", "零")
tmp2 = Replace(tmp2, "亿万", "亿")
Next
''〓上面为非正式财务算法，可以去掉〓
If Point = 1 Then tmp2 = "零元" + tmp2
If Number < 0 Then tmp2 = "负" + tmp2
If Point = 0 Then tmp2 = tmp2 + "整"
CurrencyToStr = tmp2
End Function
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Cell 属性的使用：
Cell 的作用是给以选定区块的特定的设置值，具体值可参阅相应属性值。
语法：Cell(条件准则, Row1, Col1, Row2, Col2) = 相应准则值
其中的“条件准则”有以下准则常数，根据准则的不同而设置相应准则的值：
flexcpAlignment 对齐方式
flexcpBackColor 背景色
flexcpChecked 选择框
flexcpCustomFormat 格式设置
flexcpData 日期
flexcpFloodColor 颜色
flexcpFloodPercent 背景色
flexcpFont 字体
flexcpFontBold 粗体
flexcpFontItalic 斜体
flexcpFontName 字体名
flexcpFontSize 字体大小
flexcpFontStrikethru 删除线
flexcpFontUnderline 下划线
flexcpFontWidth 字符宽
flexcpForeColor 字符色
flexcpHeight 高
flexcpLeft 左
flexcpPicture 添加图
flexcpPictureAlignment 图对齐
flexcpRefresh 刷新
flexcpSort 分类
flexcpText 字符
flexcpTextDisplay 显示字符
flexcpTextStyle 文本样式
flexcpTop 返回顶端高，同 RowPos 和 valueMatrix 属性
flexcpvalue 返回字符值
flexcpVariantvalue 返回字符值
flexcpWidth 返回单元宽
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
flexSTSum 方法：每行增加小计行[这个方法还不会用]语法：
VSG.flexSTSum 常数名,
[GroupOn As Long], :标签列
[TotalOn As Long], :计算列
[Format As String], :格式，例 "$0.00"
[BackColor As Color], :Color
[ForeColor As Color], :Color
[FontBold As Boolean], :False|True
[Caption As String], :例 "数 %s"
[MatchFrom As Integer], :0|1|2|3
[TatalOnly As Boolean] :False|True
常数名：
常数 常数值 说明
flexSTNone 0 大纲唯一的，没有合计价值
flexSTClear 1 清除全部的小计
flexSTSum 2 总数
flexSTPercent 3 总数的百分比
flexSTCount 4 行数
flexSTAverage 5 平均
flexSTMax 6 最大的
flexSTMin 7 最小的
flexSTStd 8 标准偏差
flexSTVar 9 方差
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
MousePointer、MouseIcon 鼠标指针的应用：
0=flexDefault
1=flexArrow
2=flexCross
3=flexIBeam
4=flexIcon
5=flexSize
6=flexSizeNESW
7=flexSizeNS
8=flexSizeNWSE
9=flexSizeEW
10=flexUpArrow
11=flexHourglass
12=flexNoDrop
13=flexArrowHourGlass
14=flexArrowQuestion
15=flexSizeAll
50=flexPointerCopy '(&H32) '拖动带拷贝
51=flexPointerMove '(&H33) '拖动
52=flexSizeHorz '(&H34) '左右调整
53=flexSizeVert '(&H35) '上下调整
54=flexHand '(&H36) 手型
99=flexCustom '自定义
Const MA = "50,51,52,53,54"
Dim xy As Integer
xy = Val(Text1.Text)
If xy > 15 And xy <> 99 And InStr(MA, xy) = 0 Then xy = 15
VSG1.MousePointer = xy
If xy = 99 Then
VSG1.MouseIcon = LoadPicture("C:\icon\Icon.ico")
End If
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
单击列头将列互相拖动调换：
方法一：
VSG1.ExplorerBar = flexExMove '2 这是最简单的方法了
注意这个属性在VB属性表中只设置了0、1、2、3、5、7、8种常数值
ExplorerBar 属性(value=0|1|2|3|5|7|8)：
0-flexExNone：默认，单击列头选择整列，单击行头选择整行
1-flexExSort：单击列头可正反排序该列，单击行头选择整行
2-flexExMove：单击列头可交换列顺序，单击行头选择整行
3-flexExSortAndMove：具有 1 和 2 的功能
4：单击列头可正反排序该列并在列头显示相应箭头，单击行头选择整行
5-flexExSortShow：好像与 4 相同也
6：具有 2 和 4 的功能
7-flexExSortShowAndMove：好像与 6 相同也
8-flexExMoveRows：单击列头选择整列，可拖动行
9：单击列头可正反排序该列，可拖动行
10：可拖动行与列
11：可排序列及拖动行列
12：可排序列并在列头显示相应箭头，还可拖动行
13：同 12。
14：除 12 功能外，可拖动列
15：同 14。
方法二：
Private Sub VSG1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim r%, c%
r = VSG1.MouseRow
c = VSG1.MouseCol
If r = 0 And c > 0 Then
VSG1.Tag = c
VSG1.Cell(flexcpBackColor, 0, c) = vbYellow
VSG1.MousePointer = flexPointerMove
End If
End Sub
Private Sub VSG1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Len(VSG1.Tag) Then
Dim r%, c%, p%
r = VSG1.MouseRow
c = VSG1.MouseCol
If r = 0 And c > 0 Then p = flexPointerMove
If VSG1.MousePointer <> p Then VSG1.MousePointer = p
End If
End Sub
Private Sub VSG1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Len(VSG1.Tag) Then
Dim r%, c%, target%
target = VSG1.Tag
VSG1.Cell(flexcpBackColor, 0, target) = 0
VSG1.Tag = ""
VSG1.MousePointer = 0
r = VSG1.MouseRow
c = VSG1.MouseCol
If r = 0 And c > 0 And c <> target Then
VSG1.ColPosition(target) = c
End If
End If
End Sub
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
VSFlexString控件属性一览表
CaseSensitive ???
Error 失败时取得错误信息
Index 索引
MatchCount 取得与检索条件相一致的字符串数量
MatchIndex 设定与检索条件相一致的字符串的索引
MatchLength 取得与检索条件相一致的字符串长度
MatchStart 取得与检索条件相一致的字符串起始位置
MatchString 取得与检索条件相一致的字符串
Name
Object
Parent
Pattern 设定检索条件
Replace 设定置换字符串
Soundex 取得代表当前检索字符的声音代码
Tag
TagCount 取得与检索条件相一致的标签数量
TagIndex 在多个标签情况下，设定/取得与检索条件相一致的标签索引
TagLength 取得与检索条件相一致的标签长度
TagStart 取得与检索条件相一致的标签起始位置
TagString 取得与检索条件相一致的标签的字符串
Text 设定成为检索对象
Version 取得FlexString的版本号
--------------------------------------------------------
MSFlexGrid与VSFlexGrid的单元格合并例子：
Private Sub Form_Load()
Dim i As Long
With fg
.WordWrap = True
.Rows = 6
.Cols = 6
.FixedRows = 2
.FixedCols = 0
.ColWidth(0) = 1500
.RowHeight(0) = 300
.RowHeight(1) = 300
.TextMatrix(1, 1) = "进货"
.TextMatrix(1, 2) = "销售"
.TextMatrix(1, 3) = "退货"
.TextMatrix(1, 4) = "结存"
For i = 1 To .Rows - 1
.RowHeight(i) = 300 '设置行高
Next i
For i = 0 To 1
.TextMatrix(i, 0) = "上月" & vbCrLf & "结存数量" '//换行
.FixedAlignment(0) = 4
Next i
For i = 0 To 1
.TextMatrix(i, 5) = "月末结存"
.FixedAlignment(5) = 4
Next i
For i = 1 To 4
.TextMatrix(0, i) = "本月进销存数量"
.ColAlignment(i) = 4
Next i
.MergeCells = flexMergeFree
' .MergeCells = flexMergeFixedOnly
.MergeCol(0) = True
.MergeRow(0) = True
.MergeCol(5) = True
End With
End Sub
请问：如何使用 VSFlexGrid Pro 分级显示和存取数据库中的数据。类似于《让 TreeView 支持无限级分类》帖子中所介绍的使用树形控件显示和存取数据库的数据。
Dim cn as New ADODB.Recordset
Dim rs As New ADODB.Recordset
Dim lngY As Long
Dim intT As Integer
cn.open "............"
rs.Open "select 系统编号 from test order by 系统编号", cn
With VSFlexGrid1
Set .DataSource = rs
.RowOutlineLevel(1) = 1
.IsSubtotal(1) = True
For lngY = 1 To .Rows - 1
intT = Len(.TextMatrix(lngY, 0)) - Len(Replace(.TextMatrix(lngY, 0), ".", ""))
.RowOutlineLevel(lngY) = intT
.IsSubtotal(lngY) = True
Next
.OutlineCol = 0
.OutlineBar = flexOutlineBarSimpleLeaf
End With
Set VSFlexGrid1.DataSource = Rs'这一步一定要有,
With VSFlexGrid1
.DataRefresh
.Sort = flexSortGenericDescending'排序
End With
中查找“MySQL中如何实现Top N及M至N段的记录查询？”更多相关内容
中查找“MySQL中如何实现Top N及M至N段的记录查询？”更多相关内容更多精彩
赞助商链接
