1、主要代码如下: 1、登录界面代码: Dim cn As New ADODB。Connection Dim rst As New ADODB。Recordset Private 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=student
2、s 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 ”用户名不存在!” cn。Close Text1.Text = "” Text2.Text = ”” Text1。SetFocus Else If Trim(rst("密码”)) =
3、 Trim(Text2.Text) Then 管理界面.Show Else i = i + 1 If i < 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!", vbOK
4、Only + vbExclamation, "警告" End If End If End If End Sub Private Sub Command2_Click() Text1。Text = ”” Text2。Text = "” Text3。Text = "” End Sub 2、管理界面代码: Private Sub Sinsert_Click() 添加学生信息。Show End Sub Private Sub Sselect_Click() 查询学生信息.Show End Sub Private Sub sustu_Cl
5、ick() 查询更新学生信息.Show End Sub Private Sub xgmm_Click() 修改密码。Show End Sub Private Sub yhzc_Click() 用户注册.Show End Sub 3、查询学生信息代码: Dim cn As New ADODB。Connection Dim rst As New ADODB。Recordset Private Sub Command1_Click() Set cn = New ADODB.Connection Set rst = New ADODB。Recordset cn
6、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=’” & Trim(Combo1。Text) & ”'” rst.Open mysql, cn
7、 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" .TextMatri
8、x(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.Fi
9、elds(”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。MoveNext Loop End With
10、 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.EOF Then MsgBox ”没有学生!”, vbOKOnly + vbExclamation, "警告” Combo1。Text = "" Else
11、 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 rs
12、t。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")
13、 .TextMatrix(。Rows — 1, 5) = rst.Fields(”系别") .TextMatrix(.Rows — 1, 6) = rst。Fields(”班级") rst。MoveNext Loop End With End If ElseIf Text1。Text 〈> "” Then mysql = "select * from 学生信息表 where 学号=’" & Trim(Text1.Text) & ”’”
14、 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
15、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 = 8 。TextMatrix(.Rows - 1, 1) = rst。Fields(”学号”) 。TextMatrix(
16、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.MoveNext Loop En
17、d With End If Else MsgBox ”请输入查询条件!”, vbOKOnly + vbExclamation, ”警告” End If End Sub Private Sub Command2_Click() Combo1。Text = ”” Combo2。Text = "” Text1。Text = ”" End Sub Private Sub Command3_Click() 修改学生信息.Show End Sub ’修改学生信息 Private Sub Command4_Click() S
18、et 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 mysql = "delete from 学生信息表 where 学号=’" & Text1。Text & "'” rst。Open mysql, cn MsgBo
19、x "删除成功!", vbOKOnly + vbExclamation, ”警告" End Sub Private 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 Sub 4、添加学生信息代码 Dim cn As New ADODB.Connection Dim rst As New ADOD
20、B.Recordset Private 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 Sub Private Sub Command1_Click() Set cn = New ADODB。Connection Set rst = New ADODB.Recordset cn。C
21、onnectionString = ”Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=students info;Data Source=C1847” cn。Open Dim 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。
22、Close Else rst。Close MsgBox ”该学生信息已存在!”, vbOKOnly + vbExclamation, ”警告” Text1。Text = "" Text2。Text = ”” Text3.Text = ”” Combo1。Text = ”” Combo2。Text = ”” Option1.Value = False Text1。SetFocus End If If Text1.Text = ”
23、 Then MsgBox ”请输入学号!”, vbOKOnly + vbExclamation, ”警告” Text1。SetFocus Exit Sub End If If Text2.Text = "" Then MsgBox ”请输入姓名!”, vbOKOnly + vbExclamation, ”警告" Text2。SetFocus Exit Sub End If If Text3.Text = ”” Then MsgBox "请输入年
24、龄!", vbOKOnly + vbExclamation, ”警告” Text3。SetFocus Exit Sub End If If Option1.Value Then sex = ”男” Else sex = ”女” End If xh = Trim(Text1。Text) xm = Trim(Text2。Text) xb = sex nl = Trim(Text3。Text) xofy = Trim(Combo1。Text) bj = Trim(Combo2。Text) mysql = ”insert
25、 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, cn MsgBox (”信息添加成功!") Text1.Text = ”” Text2.Text = "” Text3。Text = ”” Combo1。Text = ”” Combo2。Text = ”” Opt
26、ion1.Value = False End Sub 5、修改密码: Dim rst As New ADODB。Recordset Dim cn As New ADODB.Connection Private 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=s
27、tudents 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 If If Text2。Text = ”” Then MsgBox "请输入新密码!", vbOKOnly + vbExclamation, ”警告” Text2。SetFocus Exit
28、 Sub End If If Text3。Text = "" Then MsgBox ”请确认输入的新密码!”, vbOKOnly + vbExclamation, "警告" Text3。SetFocus Exit Sub End If If Text2。Text = Text3。Text Then xmm = Trim(Text2。Text) mysql = ”update 用户表 set 密码 = ’" & xmm & ”' where 用户名 = '" & 登陆。Text1.Text & ”’” rst。
29、Open mysql, cn MsgBox (”密修改成功!") End If End Sub Private Sub Command2_Click() Text1。Text = "" Text2。Text = "" Text3。Text = ”" End Sub 6、修改学生信息代码: Dim cn As New ADODB.Connection Dim rst As New ADODB。Recordset Private Sub Command1_Click() Set cn = New ADODB。Connection Set rst = New
30、ADODB.Recordset 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 学生信息表 where 学号=’” & usna & ”'” rst.Open mysql, cn rst.Close mysql = ”
31、delete from 学生信息表 where 学号=’” & Text1.Text & ”'” rst.Open mysql, cn If Text1。Text = ”” Then MsgBox ”请输入学号!”, vbOKOnly + vbExclamation, "警告" Text1。SetFocus Exit Sub End If If Text2.Text = ”" Then MsgBox "请输入姓名!”, vbOKOnly + vbExclamation, ”警告" Te
32、xt2。SetFocus Exit Sub End If If Text3。Text = ”” Then MsgBox ”请输入年龄!”, vbOKOnly + vbExclamation, ”警告” Text3。SetFocus Exit Sub End If If Option1。Value Then sex = ”男” Else sex = ”女" End If xh = Trim(Text1。Text) xm = Trim(Text2。Text) xb = sex
33、 nl = 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 & ”’,'" & xm & ”’,'” & xb & "’,’” & nl & ”','” & xofy & "’,’" & bj & ”')” rst.Open mysql, cn MsgBox ("信息修改成功!") Text1。Text = ”” Text2.Text = "”
34、 Text3.Text = ”” Combo1.Text = ”” Combo2。Text = ”” Option1。Value = False End Sub Private 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 Su
35、b 7、用户注册代码: Dim rst As New ADODB.Recordset Dim cn As New ADODB。Connection Private 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
36、C1847” cn。Open If Text1。Text = ”" Then MsgBox ”请输入用户名!”, vbOKOnly + vbExclamation, "警告" Text1。SetFocus Exit Sub End If If Text2。Text = "” Then MsgBox ”请输入密码!", vbOKOnly + vbExclamation, ”警告" Text2.SetFocus Exit Sub End If If Tex
37、t3。Text = ”” Then MsgBox ”请再次输入密码!”, vbOKOnly + vbExclamation, ”警告” Text3。SetFocus Exit Sub End If sryhm = Trim(Text1。Text) srmm = Trim(Text2.Text) mysql = ”insert into 用户表(用户名,密码) values (’" & sryhm & ”’,’” & srmm & ”’)” rst。Open mysql, cn MsgBox (”用户添加成功!”) Te
38、xt1。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 cn.ConnectionStr
39、ing = ”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!” Else
40、 MsgBox "用户名已存在!", vbOKOnly + vbExclamation, "警告” Text1。Text = "” Text2.Text = "” Text3.Text = ”" Text1。SetFocus Exit Sub End If End Sub '检查用户名 Private Sub Command4_Click() Set cn = New ADODB。Connection Set rst = Ne
41、w ADODB。Recordset 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
42、 MsgBox ”无此用户名,删除不成功!”, vbOKOnly + vbExclamation, ”警告” Else rst。Close usna = Trim(Text1。Text) mysql = ”delete from 用户表 where 用户名=’" & usna & ”’" rst.Open mysql, cn MsgBox ”删除成功!”, vbOKOnly + vbExclamation, "警告" Text1。Text = ”” Text
43、2.Text = ”” Text3。Text = ”” Text1.SetFocus End If End Sub ’删除用户 Private Sub Command5_Click() Set cn = New ADODB。Connection Set rst = New ADODB。Recordset cn。ConnectionString = ”Provider=SQLOLEDB。1;Persist Security Info=False;User ID=sa;I
44、nitial Catalog=students info;Data Source=C1847” cn。Open mysql = ”select * from 用户表 " rst。Open mysql, cn If rst.EOF Then MsgBox ”出错!”, vbOKOnly + vbExclamation, ”警告" End If With MSFlexGrid1 .TextMatrix(0, 1) = ”用户名” .TextMatrix(0, 2) = ”密码”
45、 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(”用户名”) .TextMatrix(.Rows - 1, 2) = rst。Fields("密码”) rst。MoveNext Loop End With rst。Close End Sub ’查询用户表






