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1、主要代码如下:1、登录界面代码:Dim cn As New ADODB。ConnectionDim rst As New ADODB。RecordsetPrivate Sub Command1_Click() Set cn = New ADODB。Connection Set rst = New ADODB.Recordset Static i% cn。ConnectionString = ”Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C

2、1847" cn。Open usna = Trim(Text1.Text) mysql = "select from 用户表 where 用户名=” usna "” rst。Open mysql, cn If rst.EOF Then MsgBox ”用户名不存在!” cn。Close Text1。Text = ” Text2。Text = "" Text1。SetFocus Else If Trim(rst(”密码”)) = Trim(Text2。Text) Then 管理界面。Show Else i = i + 1 If i < 3

3、Then MsgBox ”用户名或密码错误!”, vbOKOnly + vbExclamation, "警告" cn.Close Text2。Text = "” Text1.Text = ” Text1.SetFocus Else MsgBox ”该用户已被锁定!", vbOKOnly + vbExclamation, ”警告” End If End If End If End SubPrivate Sub Command2_Click()Text1.Text = ""Text2.Text = ”Text3。Text = ”End S

4、ub2、管理界面代码:Private Sub Sinsert_Click()添加学生信息。ShowEnd SubPrivate Sub Sselect_Click()查询学生信息.ShowEnd SubPrivate Sub sustu_Click()查询更新学生信息。ShowEnd SubPrivate Sub xgmm_Click()修改密码。ShowEnd SubPrivate Sub yhzc_Click()用户注册.ShowEnd Sub3、查询学生信息代码:Dim cn As New ADODB。ConnectionDim rst As New ADODB.RecordsetPri

5、vate Sub Command1_Click() Set cn = New ADODB.Connection Set rst = New ADODB.Recordset cn。ConnectionString = ”Provider=SQLOLEDB。1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847" cn.Open If Combo1。Text < ”" Then mysql = ”select from 学生信息表 where 系别=”

6、 & Trim(Combo1。Text) ”" rst.Open mysql, cn If rst。EOF Then MsgBox ”没有学生!”, vbOKOnly + vbExclamation, ”警告” Combo1。Text = "" Else With MSFlexGrid1 .TextMatrix(0, 1) = "学号" 。TextMatrix(0, 2) = ”姓名" 。TextMatrix(0, 3) = "性别” .TextMatrix(0, 4) = "年龄" 。TextM

7、atrix(0, 5) = "系别" 。TextMatrix(0, 6) = ”班级” MSFlexGrid1。Rows = 1 每次查询自动定位到第一行 Do While Not rst。EOF .Rows = 。Rows + 1 。CellAlignment = 8 。TextMatrix(。Rows 1, 1) = rst。Fields("学号”) .TextMatrix(.Rows 1, 2) = rst。Fields(”姓名”) .TextMatrix(。Rows - 1, 3) = rst.Fields("性别”) 。TextMatrix(。

8、Rows 1, 4) = rst.Fields("年龄") .TextMatrix(.Rows - 1, 5) = rst。Fields(”系别”) 。TextMatrix(。Rows - 1, 6) = rst.Fields(”班级”) rst。MoveNextLoop End With End If ElseIf Combo2。Text < ” Then mysql = "select from 学生信息表 where 班级=" & Trim(Combo2。Text) ”" rst。Open mysql, cn If rst.

9、EOF Then MsgBox "没有学生!”, vbOKOnly + vbExclamation, "警告" Combo1。Text = ” Else With MSFlexGrid1 。TextMatrix(0, 1) = ”学号” 。TextMatrix(0, 2) = ”姓名” 。TextMatrix(0, 3) = ”性别” 。TextMatrix(0, 4) = ”年龄” .TextMatrix(0, 5) = ”系别” 。TextMatrix(0, 6) = "班级” MSFlexGrid1.Rows = 1 每次查询自动定位到第一行 Do

10、 While Not rst。EOF .Rows = .Rows + 1 。CellAlignment = 8 .TextMatrix(。Rows 1, 1) = rst。Fields(”学号”) 。TextMatrix(.Rows 1, 2) = rst。Fields(”姓名”) 。TextMatrix(。Rows 1, 3) = rst。Fields(”性别”) 。TextMatrix(.Rows 1, 4) = rst。Fields("年龄”)。TextMatrix(.Rows 1, 5) = rst。Fields("系别") 。TextMatrix(。Ro

11、ws 1, 6) = rst.Fields(”班级") rst。MoveNextLoop End With End If ElseIf Text1.Text <> "" Then mysql = "select * from 学生信息表 where 学号='" Trim(Text1。Text) & ”'” rst.Open mysql, cn If rst.EOF Then MsgBox "没有学生!", vbOKOnly + vbExclamation, ”警告” Combo1。Text

12、 = ” Else With MSFlexGrid1 。TextMatrix(0, 1) = "学号” 。TextMatrix(0, 2) = "姓名" 。TextMatrix(0, 3) = ”性别” 。TextMatrix(0, 4) = ”年龄" 。TextMatrix(0, 5) = ”系别" 。TextMatrix(0, 6) = "班级” MSFlexGrid1。Rows = 1 '每次查询自动定位到第一行 Do While Not rst。EOF .Rows = .Rows + 1 .CellAlignment

13、= 8 。TextMatrix(.Rows 1, 1) = rst.Fields(”学号”) 。TextMatrix(.Rows 1, 2) = rst。Fields(”姓名”) 。TextMatrix(.Rows 1, 3) = rst。Fields("性别”) 。TextMatrix(。Rows 1, 4) = rst.Fields("年龄”) .TextMatrix(.Rows 1, 5) = rst。Fields(”系别”) .TextMatrix(.Rows 1, 6) = rst。Fields(”班级”) rst。MoveNextLoop End With En

14、d IfElse MsgBox ”请输入查询条件!”, vbOKOnly + vbExclamation, ”警告"End IfEnd SubPrivate Sub Command2_Click()Combo1.Text = ”"Combo2。Text = ”"Text1。Text = ”End SubPrivate Sub Command3_Click()修改学生信息。ShowEnd Sub '修改学生信息Private Sub Command4_Click() Set cn = New ADODB.Connection Set rst = New AD

15、ODB。Recordset cn.ConnectionString = ”Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847” cn。Open mysql = "delete from 学生信息表 where 学号=” & Text1。Text ”'” rst。Open mysql, cn MsgBox "删除成功!”, vbOKOnly + vbExclamation, ”警告”End SubPr

16、ivate Sub Form_Load()Combo1。AddItem ”信息服务学院"Combo1.AddItem ”电子信息工程系"Combo2。AddItem ”40821P”Combo2。AddItem ”40811P"Combo2。AddItem "40822P”Combo2.AddItem ”40721P”End Sub4、添加学生信息代码Dim cn As New ADODB。ConnectionDim rst As New ADODB。RecordsetPrivate Sub Form_Load()Combo1。AddItem "

17、;信息服务学院”Combo1。AddItem ”电子信息工程系”Combo2。AddItem ”40821P”Combo2.AddItem ”40811P"Combo2.AddItem ”40822P”Combo2.AddItem "40721P"End SubPrivate Sub Command1_Click() Set cn = New ADODB。Connection Set rst = New ADODB。Recordset cn.ConnectionString = "Provider=SQLOLEDB。1;Persist Security

18、Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847" cn。OpenDim sex As String usna = Trim(Text1。Text) mysql = ”select from 学生信息表 where 学号='” usna ”'” rst.Open mysql, cn If rst。EOF Then rst.Close Else rst。Close MsgBox ”该学生信息已存在!”, vbOKOnly + vbExclamation, "警告” Tex

19、t1。Text = ” Text2.Text = "" Text3。Text = ” Combo1.Text = "” Combo2。Text = ” Option1。Value = False Text1。SetFocus End IfIf Text1。Text = ” Then MsgBox "请输入学号!”, vbOKOnly + vbExclamation, "警告” Text1。SetFocus Exit Sub End IfIf Text2。Text = ” Then MsgBox ”请输入姓名!”, vbOKOnly + vbEx

20、clamation, "警告” Text2。SetFocus Exit Sub End IfIf Text3.Text = "” Then MsgBox ”请输入年龄!”, vbOKOnly + vbExclamation, ”警告” Text3.SetFocus Exit Sub End IfIf Option1。Value Then sex = ”男” Else sex = ”女”End Ifxh = Trim(Text1.Text)xm = Trim(Text2。Text)xb = sexnl = Trim(Text3。Text)xofy = Trim(Combo1。

21、Text)bj = Trim(Combo2.Text)mysql = "insert into 学生信息表(学号,姓名,性别,年龄,系别,班级) values (" xh & ”'," xm & ",'” & xb "','" nl & ”,'" xofy ”',” bj ”')”rst.Open mysql, cnMsgBox (”信息添加成功!”) Text1.Text = ”" Text2。Text = ” Text3。T

22、ext = "” Combo1。Text = "" Combo2。Text = ”" Option1.Value = FalseEnd Sub5、修改密码:Dim rst As New ADODB.Recordset Dim cn As New ADODB.ConnectionPrivate Sub Command1_Click() Set cn = New ADODB.Connection Set rst = New ADODB。Recordset cn.ConnectionString = "Provider=SQLOLEDB.1;Pers

23、ist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847” cn。Open If Text1。Text = "" Then MsgBox ”请输入密码!", vbOKOnly + vbExclamation, ”警告” Text1。SetFocus Exit Sub End IfIf Text2。Text = ” Then MsgBox "请输入新密码!", vbOKOnly + vbExclamation, ”警告” Text2。Set

24、Focus Exit Sub End IfIf Text3。Text = ” Then MsgBox "请确认输入的新密码!”, vbOKOnly + vbExclamation, "警告” Text3.SetFocus Exit Sub End IfIf Text2。Text = Text3。Text Thenxmm = Trim(Text2.Text)mysql = ”update 用户表 set 密码 = '” xmm ” where 用户名 = " 登陆。Text1。Text "'"rst.Open mysql, cnM

25、sgBox (”密修改成功!”)End If End SubPrivate Sub Command2_Click()Text1。Text = "”Text2.Text = ”"Text3.Text = ”End Sub6、修改学生信息代码:Dim cn As New ADODB。ConnectionDim rst As New ADODB。RecordsetPrivate Sub Command1_Click() Set cn = New ADODB。Connection Set rst = New ADODB。Recordset cn.ConnectionString =

26、 ”Provider=SQLOLEDB。1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847” cn.Open usna = Trim(Text1。Text) mysql = ”select from 学生信息表 where 学号=" usna & ”'” rst。Open mysql, cn rst。Close mysql = ”delete from 学生信息表 where 学号=" Text1。Text & ” rst。O

27、pen mysql, cnIf Text1。Text = ” Then MsgBox ”请输入学号!”, vbOKOnly + vbExclamation, ”警告” Text1。SetFocus Exit Sub End IfIf Text2.Text = ”" Then MsgBox ”请输入姓名!”, vbOKOnly + vbExclamation, "警告" Text2。SetFocus Exit Sub End IfIf Text3.Text = ”" Then MsgBox ”请输入年龄!", vbOKOnly + vbExcla

28、mation, ”警告” Text3。SetFocus Exit Sub End IfIf Option1。Value Then sex = "男" Else sex = ”女”End Ifxh = Trim(Text1。Text)xm = Trim(Text2.Text)xb = sexnl = Trim(Text3。Text)xofy = Trim(Combo1。Text)bj = Trim(Combo2。Text)mysql = "insert into 学生信息表(学号,姓名,性别,年龄,系别,班级) values (” xh & ”',&

29、quot; xm ",'” xb ”,” nl & ",'” xofy ",'" & bj ”)”rst.Open mysql, cnMsgBox (”信息修改成功!") Text1。Text = ” Text2。Text = "” Text3。Text = ”" Combo1。Text = ” Combo2.Text = ” Option1.Value = FalseEnd SubPrivate Sub Form_Load()Combo1.AddItem ”信息服务学院”Combo1

30、。AddItem "电子信息工程系”Combo2。AddItem "40821P"Combo2。AddItem "40811P”Combo2。AddItem "40822P”Combo2。AddItem ”40721P”End Sub7、用户注册代码:Dim rst As New ADODB.Recordset Dim cn As New ADODB.ConnectionPrivate Sub Command1_Click() Set cn = New ADODB.Connection Set rst = New ADODB.Recordset

31、 cn.ConnectionString = "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847” cn.Open If Text1。Text = "” Then MsgBox "请输入用户名!”, vbOKOnly + vbExclamation, ”警告” Text1.SetFocus Exit Sub End IfIf Text2。Text = "" Then MsgBox ”

32、请输入密码!", vbOKOnly + vbExclamation, "警告” Text2。SetFocus Exit Sub End IfIf Text3。Text = ” Then MsgBox ”请再次输入密码!”, vbOKOnly + vbExclamation, "警告” Text3.SetFocus Exit Sub End Ifsryhm = Trim(Text1。Text)srmm = Trim(Text2。Text)mysql = "insert into 用户表(用户名,密码) values ('" sryhm ”

33、," & srmm & ")”rst。Open mysql, cnMsgBox (”用户添加成功!”)Text1。Text = "”Text2。Text = ”Text3.Text = ” End Sub 添加用户Private Sub Command2_Click()Text1。Text = ”Text2。Text = ”Text3.Text = ”End Sub 重置按钮Private Sub Command3_Click() Set cn = New ADODB。Connection Set rst = New ADODB。Recordset

34、 cn。ConnectionString = "Provider=SQLOLEDB。1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847" cn。Open usna = Trim(Text1。Text) mysql = ”select * from 用户表 where 用户名=” & usna "'” rst.Open mysql, cn If rst.EOF Then MsgBox "用户名可用!" El

35、se MsgBox "用户名已存在!”, vbOKOnly + vbExclamation, "警告" Text1.Text = ” Text2。Text = "" Text3。Text = ” Text1.SetFocus Exit Sub End IfEnd Sub 检查用户名Private Sub Command4_Click() Set cn = New ADODB。Connection Set rst = New ADODB.Recordset cn。ConnectionString = ”Provider=SQLOLEDB。1;Persist Security Info=False;User ID=sa

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