📄 c++ builder 程序设计实用教程 - 程序完整源代码如下所 - 张晋 - 17xie.htm
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lang=EN-US style="FONT-FAMILY: 'Times New Roman'">SQL</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">语句</SPAN><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>Form1->Query1->Open();<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">打开数据库</SPAN><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>//-----------------------------------------------------------------------<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p><FONT
size=2> </FONT></o:p></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2>void __fastcall
TForm1::Button2Click(TObject *Sender)<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>Form1->Memo1->Clear();<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">清除文本框中的内容</SPAN><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>//-----------------------------------------------------------------------<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p><FONT
size=2> </FONT></o:p></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2>void __fastcall
TForm1::Timer1Timer(TObject *Sender)<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2>if
(Form1->Query1->Eof)<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button6->Enabled=false;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button8->Enabled=false;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>else<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button6->Enabled=true;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button8->Enabled=true;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2>if
(Form1->Query1->Bof)<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button5->Enabled=false;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button7->Enabled=false;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>else<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button5->Enabled=true;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes">
</SPAN>Form1->Button7->Enabled=true;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2><SPAN
style="mso-spacerun: yes"> </SPAN>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">动态设置按钮的有效状态</SPAN><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>//-----------------------------------------------------------------------<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p><FONT
size=2> </FONT></o:p></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT size=2>void __fastcall
TForm1::FormCreate(TObject *Sender)<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>{<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>Form1->Memo1->Clear();<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">清空文本框</SPAN><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>Form1->Timer1->Enabled=true;<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置控件的有效状态</SPAN><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></FONT></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>}<o:p></o:p></FONT></SPAN></P>
<P class=a0 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><FONT
size=2>//-----------------------------------------------------------------------<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT
face="Times New Roman"> </FONT></o:p></SPAN></P>
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