图书管理系统ER图-流程图-功能结构图-源代码 第16页

rs_addreader.Update

   MsgBox "添加读者信息成功！", vbOKOnly, ""

   rs_addreader.Close

   Text1 = ""

   Text2 = ""

   Text3 = ""

   Text4 = ""

   Text5 = ""

   Text6 = ""

Else

   MsgBox "读者编号重复！", vbOKOnly + vbExclamation, ""

   Text1.SetFocus

   Text1.Text = ""

   rs_addreader.Close

   Exit Sub

End If

End Sub

Private Sub Command2_Click()

Unload Me

End Sub

Private Sub Form_Load()

Combo2.AddItem "男"

Combo2.AddItem "女"

Dim rs_leibie As New ADODB.Recordset

Dim sql As String

sql = "select * from 读者类别"

rs_leibie.Open sql, conn, adOpenKeyset, adLockPessimistic

rs_leibie.MoveFirst

Do While Not rs_leibie.EOF

  Combo1.AddItem rs_leibie.Fields(0)

  rs_leibie.MoveNext

Loop

rs_leibie.Close

End Sub

10、文件名 frmreaderinfo（frmreaderinfo,frm）

功能说明：读者信息管理，可以修改和删除读者的信息。

源代码：

Option Explicit

Dim rs_reader As New ADODB.Recordset

Private Sub cmdcancel_Click()

   rs_reader.CancelUpdate

   DataGrid1.Refresh

   DataGrid1.AllowAddNew = False

   DataGrid1.AllowUpdate = False

   cmdmodify.Enabled = True

   cmddel.Enabled = True

   cmdcancel.Enabled = False

   cmdupdate.Enabled = False

End Sub

Private Sub cmddel_Click()

Dim answer As String

On Error GoTo delerror

answer = MsgBox("确定要删除吗？", vbYesNo, "")

If answer = vbYes Then

   DataGrid1.AllowDelete = True

   rs_reader.Delete

   rs_reader.Update

   DataGrid1.Refresh

   MsgBox "成功删除！", vbOKOnly + vbExclamation, ""

   DataGrid1.AllowDelete = False

Else

   Exit Sub

End If

delerror:

If Err.Number <> 0 Then

   MsgBox Err.Description

End If

End Sub

Private Sub cmdmodify_Click()

Dim answer As String

On Error GoTo cmdmodify

cmddel.Enabled = False

cmdmodify.Enabled = False

cmdupdate.Enabled = True

cmdcancel.Enabled = True

DataGrid1.AllowUpdate = True

cmdmodify:

If Err.Number <> 0 Then

   MsgBox Err.Description

End If

End Sub

Private Sub Command5_Click()

rs_reader.Update

DataGrid1.Refresh

End Sub

Private Sub cmdupdate_Click()

If Not IsNull(DataGrid1.Bookmark) Then

   rs_reader.Update

End If

   cmdmodify.Enabled = True

   cmddel.Enabled = True

   cmdcancel.Enabled = False

   cmdupdate.Enabled = False

   DataGrid1.AllowUpdate = False

   MsgBox "保存成功！", vbOKOnly + vbExclamation, ""

End Sub

Private Sub Command1_Click()

Unload Me

End Sub

Private Sub Form_Load()

Dim sql As String

On Error GoTo loaderror

sql = "select * from 读者信息"

rs_reader.CursorLocation = adUseClient

rs_reader.Open sql, conn, adOpenKeyset, adLockPessimistic     '打开数据库

cmdupdate.Enabled = False

'设定datagrid控件属性

DataGrid1.AllowAddNew = False                                 '不可增加

DataGrid1.AllowDelete = False                                 '不可删除

DataGrid1.AllowUpdate = False

If userpow = "guest" Then                                     '权限相关

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