重写mysql类
重新写了mysql类，实现了数据库的增减，以及执行mysql命令。不知道还需要添加什么功能，请感兴趣的网友告知，我再添加。。。
代码如下：
程序代码：
**************************************************
*-- 类: mysql (d:\documents\visual foxpro 项目\myclass.vcx)
*-- 父类: custom
*-- 基类: custom
*-- 时间戳: 04/04/24 09:51:01 PM
*
DEFINE CLASS mysql AS custom
Height = 19
Width = 66
*-- 数据源名称。
datasource = ""
*-- 用户名。
user = ""
*-- 密码。
password = ""
*-- 当前数据库。
currentdatabase = "null"
*-- 记录连接状态。
connected = .F.
*-- 保存连接mysql数据库的句柄。
handle = -1
Name = "mysql"
*-- 建立mysql连接。
PROCEDURE connect
IF EMPTY(this.dataSource) .or. EMPTY(this.user) .or. EMPTY(this.password)
carray=''
oform=NEWOBJECT([connector],[myclass],null,carray)
oform.show
IF ALEN(carray)=1 && 用户取消连接
this.connected=.f.
MESSAGEBOX([用户取消连接mysql服务器！])
RETURN this.connected
ELSE
this.dataSource=ALLTRIM(carray[1])
this.user=ALLTRIM(carray[2])
this.password=ALLTRIM(carray[3])
ENDIF
ENDIF
this.handle=SQLCONNECT(this.datasource,this.user,this.password)
IF this.handle<=0
this.connected=.f.
MESSAGEBOX([无法连接mysql服务器！])
this.datasource=''
this.user=''
this.password=''
ELSE
this.connected=.t.
MESSAGEBOX([已连接上mysql服务器！]+[连接]+TRANSFORM(this.handle)+[。])
ENDIF
RETURN this.connected
ENDPROC
*-- 断开sql连接。
PROCEDURE disconnect
IF this.handle>0
SQLDISCONNECT(this.handle)
this.handle=-1
this.connected=.f.
this.dataSource=''
this.user=''
this.password=''
ENDIF
ENDPROC
*-- 执行查询命令。
PROCEDURE sqlexe
PARAMETERS csqlcmd
IF this.handle>0
n=SQLEXEC(this.handle,csqlcmd)
IF n>0
MESSAGEBOX([sql语句已执行！])
RETURN .t.
ENDIF
ENDIF
MESSAGEBOX([sql语句未被正确执行！])
RETURN .f.
ENDPROC
*-- 新建一个mysql数据库。
PROCEDURE create
PARAMETERS cname
IF this.connected=.t.
n=SQLEXEC(this.handle,[create DATABASE if not exists ]+cname)
IF n>0
this.currentdatabase=cname
MESSAGEBOX([成功创建数据库]+cname+[！])
SQLEXEC(this.handle,[use ]+cname)
RETURN .t.
ENDIF
ENDIF
MESSAGEBOX([无法创建数据库]+cname+[！])
RETURN .f.
ENDPROC
*-- 选择一个mysql数据库为当前数据库。
PROCEDURE select
PARAMETERS cname
IF this.connected=.t.
n=SQLEXEC(this.handle,[use ]+cname)
IF n>0
this.currentdatabase=cname
MESSAGEBOX([已切换到当前数据库]+cname+[！])
RETURN .t.
ENDIF
ENDIF
MESSAGEBOX([无法切换数据库]+cname+[！])
RETURN .f.
ENDPROC
*-- 删除一个mysql数据库。
PROCEDURE delete
PARAMETERS cname
nanswer=MESSAGEBOX('一旦删除将无法恢复！',1+16+256,'警告！')
IF this.connected=.t. AND nanswer=1
n=SQLEXEC(this.handle,[drop DATABASE if exists ]+cname)
IF n>0
this.currentdatabase=null
MESSAGEBOX([当前数据库]+cname+[已删除！])
RETURN .t.
ENDIF
ENDIF
MESSAGEBOX([无法删除数据库]+cname+[！])
RETURN .f.
ENDPROC
ENDDEFINE
*
*-- EndDefine: mysql
**************************************************
数据库的登录界面的类定义如下：
程序代码：
**************************************************
*-- 类: connector (d:\documents\visual foxpro 项目\myclass.vcx)
*-- 父类: form
*-- 基类: form
*-- 时间戳: 04/04/24 09:51:00 PM
*
DEFINE CLASS connector AS form
Height = 250
Width = 375
DoCreate = .T.
AutoCenter = .T.
Caption = "Connect to mysql..."
MaxButton = .F.
WindowType = 1
WindowState = 0
Name = "connector"
ADD OBJECT shape1 AS shape WITH ;
Top = 12, ;
Left = 12, ;
Height = 229, ;
Width = 349, ;
Name = "Shape1"
ADD OBJECT shape2 AS shape WITH ;
Top = 13, ;
Left = 13, ;
Height = 227, ;
Width = 347, ;
BorderColor = RGB(255,255,255), ;
Name = "Shape2"
ADD OBJECT label1 AS label WITH ;
AutoSize = .T., ;
Caption = "连接mysql数据库", ;
Height = 16, ;
Left = 28, ;
Top = 7, ;
Width = 92, ;
Name = "Label1"
ADD OBJECT label2 AS label WITH ;
AutoSize = .T., ;
Caption = "数据源名称：", ;
Height = 16, ;
Left = 26, ;
Top = 66, ;
Width = 74, ;
Name = "Label2"
ADD OBJECT text1 AS textbox WITH ;
Height = 20, ;
Left = 146, ;
Top = 64, ;
Width = 100, ;
Name = "Text1"
ADD OBJECT label3 AS label WITH ;
AutoSize = .T., ;
Caption = "用户名：", ;
Height = 16, ;
Left = 26, ;
Top = 113, ;
Width = 50, ;
Name = "Label3"
ADD OBJECT label4 AS label WITH ;
AutoSize = .T., ;
Caption = "密码：", ;
Height = 16, ;
Left = 26, ;
Top = 162, ;
Width = 38, ;
Name = "Label4"
ADD OBJECT text2 AS textbox WITH ;
Height = 20, ;
Left = 146, ;
Top = 111, ;
Width = 100, ;
Name = "Text2"
ADD OBJECT text3 AS textbox WITH ;
Height = 20, ;
Left = 146, ;
Top = 160, ;
Width = 100, ;
PasswordChar = "*", ;
Name = "Text3"
ADD OBJECT command1 AS commandbutton WITH ;
Top = 204, ;
Left = 224, ;
Height = 25, ;
Width = 60, ;
Caption = "确定", ;
Name = "Command1"
ADD OBJECT command2 AS commandbutton WITH ;
Top = 204, ;
Left = 292, ;
Height = 25, ;
Width = 60, ;
Caption = "取消", ;
Name = "Command2"
PROCEDURE Init
*!* 用法如下：
*!* calia=''
*!* oform=NEWOBJECT([connector],[myclass],null,calia)
*!* oform.Show
*!* ?ALEN(carray) &&如果等于1，则表示用户取消连接任务
*!* ?carray[1]
PARAMETERS carray
IF PARAMETERS()=0
MESSAGEBOX([需要一个数组参数！])
RETURN .f.
ENDIF
ENDPROC
PROCEDURE command1.Click
IF EMPTY(thisform.text1.value) .or. EMPTY(thisform.text2.Value) .OR. EMPTY(thisform.text3.Value)
MESSAGEBOX([请正确输入数据源，用户名及密码！])
ELSE
DIMENSION carray[3]
carray[1]=thisform.text1.Value
carray[2]=thisform.text2.Value
carray[3]=thisform.text3.value
thisform.release
ENDIF
ENDPROC
PROCEDURE command2.Click
DIMENSION carray[1]
thisform.Release()
ENDPROC
ENDDEFINE
*
*-- EndDefine: connector
**************************************************
