NETCF开发之文件压缩和解压缩

当需要在网上传送数据的情况下压缩是极其有用的,特别是对于非常慢且代价昂贵的网络,例如GPRS连接。在这种情况中,使用压缩能够极大地缩小数据尺寸并且减少整个通讯耗费。Web Service是另一个领域-此时,使用压缩能提供巨大的优点,因为XML数据能被高度压缩。

由于.NET Compact Framework 2.0没有支持命名空间System.IO.Compression,所以NETCF上开发压缩和解压缩功能并不是很方便

我相信很多人都知道SharpDevelop,开发ShareDevelopic#code有另一个开源项目SharpZipLib for .NETSharpZipLib.NET实现了Zip/GZip/BZip2/Tar的算法,可以很方便的按我们的要求做文件进行压缩和解压缩,而且更重要的是它的开源性。SharpZipLib可以在http://www.icsharpcode.net/OpenSource/SharpZipLib/Download.aspx下载。

这段时间做的一个移动软件项目里正好涉及将用户数据进行压缩/解压缩的功能,找了一些这方面的资料,现在把在NETCF下实现压缩和解压的代码贴上来。

下面给出了实现文件压缩/解压缩的基于.NET Compact FrameworkWindows窗体界面设计。

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1:压缩 2:解压缩

在图1中,首先在“压缩目标路径”输入框中设定路径,然后在“压缩文件名”输入框中设置即将生成的压缩文件名。本例设置目标路径为\Program Files\createzipfile\,路径下的所有文件(包含隐藏文件),都将被压缩到\Program Files\createzipfile\MyZip.zip文件中。

“压缩目标路径”输入框命名为txtSourceDir,“压缩文件名”输入框命名为txtZipFileName,“压缩”按钮命名为btnZipIt,按钮点击事件中的代码如清单1所示。

清单1:“压缩”按钮点击事件

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LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Private Sub btnZipIt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Handles btnZipIt.Click<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim astrFileNames() As String = Directory.GetFiles(txtSourceDir.Text)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim objCrc32 As New Crc32()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim strmZipOutputStream As ZipOutputStream<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmZipOutputStream = New ZipOutputStream(File.Create(txtZipFileName.Text))<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmZipOutputStream.SetLevel(6)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim strFile As String<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">For Each strFile In astrFileNames<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim strmFile As FileStream = File.OpenRead(strFile)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim abyBuffer(strmFile.Length - 1) As Byte<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmFile.Read(abyBuffer, 0, abyBuffer.Length)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim objZipEntry As ZipEntry = New ZipEntry(strFile)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objZipEntry.DateTime = DateTime.Now<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objZipEntry.Size = strmFile.Length<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmFile.Close()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objCrc32.Reset()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objCrc32.Update(abyBuffer)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objZipEntry.Crc = objCrc32.Value<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmZipOutputStream.PutNextEntry(objZipEntry)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmZipOutputStream.Write(abyBuffer, 0, abyBuffer.Length)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Next<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmZipOutputStream.Finish()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">strmZipOutputStream.Close()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">MessageBox.Show("</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">压缩完成</span><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">")<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End Sub<p></p></font></span></p> </div> </td> </tr></tbody></table></textbox></rect><wrap type="none"></wrap><anchorlock></anchorlock></group>

在图2中,首先在“压缩文件名”输入框中指定需要查看或解压缩的压缩文件名,点击“查看”按钮后将指定的压缩文件内的文件显示在ListView控件中,在ListView控件中选中一行记录并在弹出式菜单中选择“释出”菜单项将文件解压缩出来。本例设置压缩文件名为\Program Files\createzipfile\MyZip.zip。“压缩文件名”输入框命名为txtFileNameListView控件命名为lvZipContents,“查看”按钮命名为btnView,按钮点击事件中的代码如清单2所示。“释出”菜单项点击事件中的代码如清单3所示。

清单2:“查看”按钮点击事件

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TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim objItem As ListViewItem<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim zFile As ZipFile<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Try<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">zFile = New ZipFile(txtFileName.Text)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Catch Ex As System.Exception<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">MessageBox.Show(Ex.Message)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Exit Sub<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End Try<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">lblListName.Text = "Listing of : " + zFile.Name.ToString<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">lvZipContents.BeginUpdate()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">lvZipContents.Items.Clear()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">For Each objEntry In zFile<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objItem = New ListViewItem(Path.GetFileName(objEntry.Name))<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">dtStamp = objEntry.DateTime<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objItem.SubItems.Add(objEntry.Size.ToString)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objItem.SubItems.Add(objEntry.CompressedSize.ToString)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objItem.SubItems.Add(dtStamp.ToString("yy-MM-dd"))<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objItem.SubItems.Add(dtStamp.ToString("t"))<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">objItem.SubItems.Add(objEntry.Name.ToString)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">lvZipContents.Items.Add(objItem)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Next<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">lvZipContents.EndUpdate()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End Sub<p></p></font></span></p> </div> </td> </tr></tbody></table></textbox></rect><wrap type="none"></wrap><anchorlock></anchorlock></group>

清单3:“释出”菜单项点击事件

<group id="_x0000_s1026" style="WIDTH: 414pt; HEIGHT: 429pt; mso-position-horizontal-relative: char; mso-position-vertical-relative: line" coordsize="7200,7474" coordorigin="2526,7642" editas="canvas"><lock aspectratio="t" v:ext="edit"></lock><shape id="_x0000_s1027" style="LEFT: 2526px; WIDTH: 7200px; POSITION: absolute; TOP: 7642px; HEIGHT: 7474px" o:preferrelative="f" type="#_x0000_t75"><fill o:detectmouseclick="t"></fill><path o:connecttype="none" o:extrusionok="t"></path><lock v:ext="edit" text="t"></lock></shape><rect id="_x0000_s1028" style="LEFT: 2526px; WIDTH: 7200px; POSITION: absolute; TOP: 7642px; HEIGHT: 7474px" strokecolor="#eaeaea" fillcolor="#eaeaea"><textbox style="mso-next-textbox: #_x0000_s1028"><table cellspacing="0" cellpadding="0" width="100%"><tbody><tr> <td style="BORDER-LEFT-COLOR: #ece9d8; BORDER-BOTTOM-COLOR: #ece9d8; BORDER-TOP-COLOR: #ece9d8; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #ece9d8"> <div> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Private Sub MenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Handles MenuItem1.Click<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim SelectedIndex As ListView.SelectedIndexCollection = lvZipContents.SelectedIndices<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim index As Integer<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">For Each index In SelectedIndex<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim s As ZipInputStream = New ZipInputStream(File.OpenRead(txtFileName.Text))<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim directoryName As String = "\Program Files\createzipfile\"<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><p><font face="Times New Roman"></font></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim theEntry As ZipEntry<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">theEntry = s.GetNextEntry()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">While (theEntry IsNot Nothing)<span style="mso-spacerun: yes"> </span><p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 42pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim fileName As String = Path.GetFileName(theEntry.Name)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 42pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">If fileName.Equals(Path.GetFileName(lvZipContents.Items.Item(index).Text)) Then<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">'</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">生成解压目录</span><span lang="EN-US" style="FONT-SIZE: 9pt"><p></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Directory.CreateDirectory(directoryName)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">'</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解压文件到指定的目录</span><span lang="EN-US" style="FONT-SIZE: 9pt"><p></p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim streamWriter As FileStream = File.Create(theEntry.Name)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim size As Integer = 2048<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Dim data(size) As Byte<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">While (True)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 84pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">size = s.Read(data, 0, data.Length - 1)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 84pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">If (size &gt; 0) Then<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 105pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">streamWriter.Write(data, 0, size)<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 84pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Else<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 105pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Exit While<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 84pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End If<span style="mso-spacerun: yes"> </span><span style="mso-spacerun: yes"></span><p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End While<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 63pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">streamWriter.Close()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 42pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End If<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 42pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">theEntry = s.GetNextEntry()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 42pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End While<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">s.Close()<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">Next<p></p></font></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12pt; mso-line-height-rule: exactly"><span lang="EN-US" style="FONT-SIZE: 9pt"><font face="Times New Roman">End Sub<p></p></font></span></p> </div> </td> </tr></tbody></table></textbox></rect><wrap type="none"></wrap><anchorlock></anchorlock></group>

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