vb点虐 字符串排序 vb字符串反序怎么弄

vb点虐 如何对数据库查询结果记录集排序？

加了单引号就是一个常量字符串了，对于每一行都是一样的

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像这种放在最前面的字段，order by 1 就可以了

VB 字符串排序

Option Explicit

Private Sub Command1_Click() '排序

Dim i%, j%, S() As String, t As String

ReDim S(Len(Trim(Text1)))

For i = LBound(S) To UBound(S)

S(i) = Mid(Trim(Text1), i + 1, 1)

Next

For i = 0 To UBound(S)

For j = i + 1 To UBound(S)

If S(j) S(i) Then t = S(i): S(i) = S(j): S(j) = t

Next

Text2 = Text2 S(i)

Text2 = Trim(Text2)

Next

End Sub

Private Sub Command2_Click() '读入

Dim Txt As String

Open App.Path "\test12.txt" For Input As #11

Do While Not EOF(11)

Line Input #11, Txt

Text1 = Text1 Txt

Loop

Close #11

End Sub

Private Sub Command3_Click() '追加

Open App.Path "\test12.txt" For Append As #12

Print #12, Text2

Close #12

End Sub

VB怎么使一个字符串按要求排序？就是字符串里面有数字和字母。先按字母在前。数字在后面。字母和数字也

什么都不说，先上效果图——

编码——

Private Sub Command1_Click()

Dim s1 As String, s_num As String, a As String

Dim lennum As Integer, lenuchar As Integer, lenlchar As Integer

Dim s_lchar As String, s_uchar As String

Dim i As Integer, length As Integer, value As Integer

s1 = Text1.Text

s_num = ""         '用来存放数字的字符串变量

s_uchar = ""        '用来存放大写字母的字符串变量

s_lchar = ""        '用来存放小写字母的字符串变量

length = Len(s1)

For i = 1 To length

a = Mid(s1, i, 1)

value = Asc(a)

Text2.Text = value

If value = 48 And value = 57 Then s_num = s_num a

If value = 65 And value = 90 Then s_uchar = s_uchar a

If value = 97 And value = 122 Then s_lchar = s_lchar a

Next i

' 把字符串中的各种字符分类成 数字类，大写字母，小写字母

lennum = Len(s_num)

lenuchar = Len(s_uchar)

lenlchar = Len(s_lchar)

Dim sz() As Integer    '定义动态数组

Dim temp As Integer

ReDim sz(1 To lennum) As Integer   '定义数组供 数字的ASCII码

For i = 1 To lennum

a = Mid(s_num, i, 1)

sz(i) = Asc(a)

Next i

For i = lennum To 1 Step -1         '最常用的冒泡排序法

For j = 1 To i - 1

  If sz(j) sz(j + 1) Then temp = sz(j): sz(j) = sz(j + 1): sz(j + 1) = temp

Next j

Next i

s_num = ""              '清空s_num ，因为要重新排列了

For i = 1 To lennum

s_num = s_num Chr(sz(i))

Next i

ReDim sz(1 To lenuchar) As Integer  '重新定义数组供 大写字母的ASCII码，接下来程序思路与上面类似

For i = 1 To lenuchar

a = Mid(s_uchar, i, 1)

sz(i) = Asc(a)

Next i

For i = lenuchar To 1 Step -1

For j = 1 To i - 1

  If sz(j) sz(j + 1) Then temp = sz(j): sz(j) = sz(j + 1): sz(j + 1) = temp

Next j

Next i

s_uchar = ""

For i = 1 To lenuchar

s_uchar = s_uchar Chr(sz(i))

Next i

ReDim sz(1 To lenlchar) As Integer  '重新定义数组供 小写字母的ASCII码，接下来程序思路与上面类似

For i = 1 To lenlchar

a = Mid(s_lchar, i, 1)

sz(i) = Asc(a)

Next i

For i = lenlchar To 1 Step -1

For j = 1 To i - 1

  If sz(j) sz(j + 1) Then temp = sz(j): sz(j) = sz(j + 1): sz(j + 1) = temp

Next j

Next i

s_lchar = ""

For i = 1 To lenlchar

s_lchar = s_lchar Chr(sz(i))

Next i

Text2.Text = s_uchar s_lchar s_num

End Sub

该程序主要运用了Asc()函数获得ASCII码来分辨字母与数字，用 动态数组和重定义来多次运用数组进行排序（冒泡排序法）和赋值操作，用chr()函数还原字符串。

我的程序有点略长，中间有少许重复部分，但我觉得思路比较清晰易懂，适合初学者。你也可以试着自己改进。