17.mht

C#程序设计开发

<P><STRONG>=E4=BB=8E=E5=87=BB=E9=BC=93=E4=BC=A0=E8=8A=B1=E8=B0=88=E8=B5=B7=
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<P>=E5=87=BB=E9=BC=93=E4=BC=A0=E8=8A=B1=E6=98=AF=E4=B8=80=E7=A7=8D=E7=83=AD=
=E9=97=B9=E8=80=8C=E5=8F=88=E7=B4=A7=E5=BC=A0=E7=9A=84=E9=A5=AE=E9=85=92=E6=
=B8=B8=E6=88=8F=E3=80=82=E5=9C=A8=E9=85=92=E5=AE=B4=E4=B8=8A=E5=AE=BE=E5=AE=
=A2=E4=BE=9D=E6=AC=A1=E5=9D=90=E5=AE=9A=E4=BD=8D=E7=BD=AE=EF=BC=8C=E7=94=B1=
=E4=B8=80=E4=BA=BA=E5=87=BB=E9=BC=93=EF=BC=8C=E5=87=BB=E9=BC=93=E7=9A=84=E5=
=9C=B0=E6=96=B9=E4=B8=8E=E4=BC=A0=E8=8A=B1=E7=9A=84=E5=9C=B0=E6=96=B9=E6=98=
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=E6=9D=9F=E5=9C=A8=E6=9F=90=E4=BA=BA=E6=89=8B=E4=B8=AD=EF=BC=8C=E5=88=99=E8=
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<P>=E5=87=BB=E9=BC=93=E4=BC=A0=E8=8A=B1=E4=BE=BF=E6=98=AF=E8=B4=A3=E4=BB=BB=
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=BB=BB=E9=93=BE=E5=8F=AF=E8=83=BD=E6=98=AF=E4=B8=80=E6=9D=A1=E7=9B=B4=E7=BA=
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=80=82</P>
<H2><BR>=E4=BA=8C=E3=80=81&nbsp;=E8=B4=A3=E4=BB=BB=E9=93=BE=E6=A8=A1=E5=BC=
=8F=E7=9A=84=E7=BB=93=E6=9E=84</H2>
<P>&nbsp;</P>
<P>=E8=B4=A3=E4=BB=BB=E9=93=BE=E6=A8=A1=E5=BC=8F=E6=B6=89=E5=8F=8A=E5=88=B0=
=E7=9A=84=E8=A7=92=E8=89=B2=E5=A6=82=E4=B8=8B=E6=89=80=E7=A4=BA=EF=BC=9A<=
/P>
<P><IMG height=3D190=20
src=3D"http://www.cnblogs.com/images/cnblogs_com/zhenyulu/Pic98.gif" =
width=3D319=20
border=3D0></P>
<P><FONT=20
color=3D#000080>=E6=8A=BD=E8=B1=A1=E5=A4=84=E7=90=86=E8=80=85(Handler)=E8=
=A7=92=E8=89=B2=EF=BC=9A</FONT>=E5=AE=9A=E4=B9=89=E5=87=BA=E4=B8=80=E4=B8=
=AA=E5=A4=84=E7=90=86=E8=AF=B7=E6=B1=82=E7=9A=84=E6=8E=A5=E5=8F=A3=E3=80=82=
=E5=A6=82=E6=9E=9C=E9=9C=80=E8=A6=81=EF=BC=8C=E6=8E=A5=E5=8F=A3=E5=8F=AF=E4=
=BB=A5=E5=AE=9A=E4=B9=89=E5=87=BA=E4=B8=80=E4=B8=AA=E6=96=B9=E6=B3=95=EF=BC=
=8C=E4=BB=A5=E8=AE=BE=E5=AE=9A=E5=92=8C=E8=BF=94=E5=9B=9E=E5=AF=B9=E4=B8=8B=
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=89=B2=E9=80=9A=E5=B8=B8=E7=94=B1=E4=B8=80=E4=B8=AA=E6=8A=BD=E8=B1=A1=E7=B1=
=BB=E6=88=96=E6=8E=A5=E5=8F=A3=E5=AE=9E=E7=8E=B0=E3=80=82</P>
<P><FONT=20
color=3D#000080>=E5=85=B7=E4=BD=93=E5=A4=84=E7=90=86=E8=80=85(ConcreteHan=
dler)=E8=A7=92=E8=89=B2=EF=BC=9A</FONT>=E5=85=B7=E4=BD=93=E5=A4=84=E7=90=86=
=E8=80=85=E6=8E=A5=E5=88=B0=E8=AF=B7=E6=B1=82=E5=90=8E=EF=BC=8C=E5=8F=AF=E4=
=BB=A5=E9=80=89=E6=8B=A9=E5=B0=86=E8=AF=B7=E6=B1=82=E5=A4=84=E7=90=86=E6=8E=
=89=EF=BC=8C=E6=88=96=E8=80=85=E5=B0=86=E8=AF=B7=E6=B1=82=E4=BC=A0=E7=BB=99=
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=90=86=E8=80=85=E6=8C=81=E6=9C=89=E5=AF=B9=E4=B8=8B=E5=AE=B6=E7=9A=84=E5=BC=
=95=E7=94=A8=EF=BC=8C=E5=9B=A0=E6=AD=A4=EF=BC=8C=E5=A6=82=E6=9E=9C=E9=9C=80=
=E8=A6=81=EF=BC=8C=E5=85=B7=E4=BD=93=E5=A4=84=E7=90=86=E8=80=85=E5=8F=AF=E4=
=BB=A5=E8=AE=BF=E9=97=AE=E4=B8=8B=E5=AE=B6=E3=80=82</P>
<H2><BR>=E4=B8=89=E3=80=81&nbsp;=E8=B4=A3=E4=BB=BB=E9=93=BE=E6=A8=A1=E5=BC=
=8F=E7=9A=84=E7=A4=BA=E6=84=8F=E6=80=A7=E6=BA=90=E4=BB=A3=E7=A0=81</H2>
<DIV=20
style=3D"BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; =
BORDER-TOP: windowtext 0.5pt solid; PADDING-LEFT: 5.4pt; BACKGROUND: =
#e6e6e6; PADDING-BOTTOM: 4px; BORDER-LEFT: windowtext 0.5pt solid; =
WIDTH: 98%; WORD-BREAK: break-all; PADDING-TOP: 4px; BORDER-BOTTOM: =
windowtext 0.5pt solid">
<DIV><IMG =
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: =
#008000">&nbsp;Chain&nbsp;of&nbsp;Responsibility&nbsp;pattern&nbsp;--&nbs=
p;Structural&nbsp;example&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">using</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;System;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000">&nbsp;"Handler"</SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">abstract</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">class</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;Handler<BR><IMG=20
id=3DCodehighlighter1_110_311_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_110_311_Open_Text.style.display=3D'none'; =
Codehighlighter1_110_311_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_110_311_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockSta=
rt.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_110_311_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_110_311_Closed_Text.style.display=3D'none'; =
Codehighlighter1_110_311_Open_Image.style.display=3D'inline'; =
Codehighlighter1_110_311_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.=
gif"=20
align=3Dtop></SPAN><SPAN id=3DCodehighlighter1_110_311_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_110_311_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;</SPAN><SPAN style=3D"COLOR: =
#008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000">&nbsp;Fields</SPAN><SPAN style=3D"COLOR: =
#008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">protected</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;Handler&nbsp;successor;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;</SPAN><SPAN style=3D"COLOR: =
#008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000">&nbsp;Methods</SPAN><SPAN style=3D"COLOR: =
#008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">public</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">void</SPAN><SPAN=20
style=3D"COLOR: =
#000000">&nbsp;SetSuccessor(&nbsp;Handler&nbsp;successor&nbsp;)<BR><IMG=20
id=3DCodehighlighter1_220_256_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_220_256_Open_Text.style.display=3D'none'; =
Codehighlighter1_220_256_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_220_256_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
Start.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_220_256_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_220_256_Closed_Text.style.display=3D'none'; =
Codehighlighter1_220_256_Open_Image.style.display=3D'inline'; =
Codehighlighter1_220_256_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlo=
ck.gif"=20
align=3Dtop>&nbsp;&nbsp;</SPAN><SPAN =
id=3DCodehighlighter1_220_256_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_220_256_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">this</SPAN><SPAN=20
style=3D"COLOR: #000000">.successor&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #000000">=3D</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;successor;<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
End.gif"=20
align=3Dtop>&nbsp;&nbsp;}</SPAN></SPAN><SPAN style=3D"COLOR: =
#000000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;</SPAN><SPAN style=3D"COLOR: =
#0000ff">abstract</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">public</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">void</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;HandleRequest(&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">int</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;request&nbsp;);<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd=
.gif"=20
align=3Dtop>}</SPAN></SPAN><SPAN style=3D"COLOR: #000000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000">&nbsp;"ConcreteHandler1"</SPAN><SPAN=20
style=3D"COLOR: #008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/None.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: #0000ff">class</SPAN><SPAN=20
style=3D"COLOR: =
#000000">&nbsp;ConcreteHandler1&nbsp;:&nbsp;Handler<BR><IMG=20
id=3DCodehighlighter1_369_640_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_369_640_Open_Text.style.display=3D'none'; =
Codehighlighter1_369_640_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_369_640_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockSta=
rt.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_369_640_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_369_640_Closed_Text.style.display=3D'none'; =
Codehighlighter1_369_640_Open_Image.style.display=3D'inline'; =
Codehighlighter1_369_640_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.=
gif"=20
align=3Dtop></SPAN><SPAN id=3DCodehighlighter1_369_640_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_369_640_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;</SPAN><SPAN style=3D"COLOR: =
#008000">//</SPAN><SPAN=20
style=3D"COLOR: #008000">&nbsp;Methods</SPAN><SPAN style=3D"COLOR: =
#008000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop></SPAN><SPAN style=3D"COLOR: =
#000000">&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">override</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">public</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">void</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;HandleRequest(&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">int</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;request&nbsp;)<BR><IMG=20
id=3DCodehighlighter1_438_638_Open_Image=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_438_638_Open_Text.style.display=3D'none'; =
Codehighlighter1_438_638_Closed_Image.style.display=3D'inline'; =
Codehighlighter1_438_638_Closed_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlock=
Start.gif"=20
align=3Dtop><IMG id=3DCodehighlighter1_438_638_Closed_Image =
style=3D"DISPLAY: none"=20
onclick=3D"this.style.display=3D'none'; =
Codehighlighter1_438_638_Closed_Text.style.display=3D'none'; =
Codehighlighter1_438_638_Open_Image.style.display=3D'inline'; =
Codehighlighter1_438_638_Open_Text.style.display=3D'inline';"=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlo=
ck.gif"=20
align=3Dtop>&nbsp;&nbsp;</SPAN><SPAN =
id=3DCodehighlighter1_438_638_Closed_Text=20
style=3D"BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; =
DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 =
1px solid; BACKGROUND-COLOR: #ffffff"><IMG=20
src=3D"http://www.cnblogs.com/Images/dot.gif"></SPAN><SPAN=20
id=3DCodehighlighter1_438_638_Open_Text><SPAN style=3D"COLOR: =
#000000">{<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">if</SPAN><SPAN=20
style=3D"COLOR: #000000">(&nbsp;request&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #000000">&gt;=3D</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN style=3D"COLOR: =
#000000">0</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #000000">&amp;&amp;</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;request&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #000000">&lt;</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;</SPAN><SPAN style=3D"COLOR: =
#000000">10</SPAN><SPAN=20
style=3D"COLOR: #000000">&nbsp;)<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Console.WriteLine(</SPAN>=
<SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN=20
style=3D"COLOR: =
#000000">{0}&nbsp;handled&nbsp;request&nbsp;{1}</SPAN><SPAN=20
style=3D"COLOR: #000000">"</SPAN><SPAN style=3D"COLOR: =
#000000">,<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN =

style=3D"COLOR: #0000ff">this</SPAN><SPAN=20
style=3D"COLOR: #000000">,&nbsp;request&nbsp;);<BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">else</SPAN><SPAN style=3D"COLOR: =
#000000"><BR><IMG=20
src=3D"http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif"=20
align=3Dtop>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">if</SPAN><SPAN=20
style=3D"COLOR: #000000">(&nbsp;successor&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #000000">!=3D</SPAN><SPAN style=3D"COLOR: =
#000000">&nbsp;</SPAN><SPAN=20
style=3D"COLOR: #0000ff">null</SPAN><SPAN style=3D"COLOR: =
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