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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Working with Install Packages</title>
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<span class="productTitle">Deployment Tools Foundation</span><br />
<span class="topicTitle">Working with Install Packages</span><br />
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<a href="using.htm">Development Guide</a> >
<span class="nolink">Install Packages</span>
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<h3>Updating files in a product layout</h3>
<p>The InstallPackage class makes it easy to work with files and cabinets
in the context of a compressed or uncompressed product layout.</p>
<p>This hypothetical example takes an IDictionary 'files' which maps file keys to file paths. Each
file is to be updated in the package layout; cabinets are even recompressed if necessary to include the new files.</p>
<pre><font face="Consolas, Courier New"> <font color=blue>using</font> (InstallPackage pkg = <font color=blue>new</font> InstallPackage(<font color=purple>"d:\builds\product.msi"</font>,
DatabaseOpenMode.Transact))
{
pkg.WorkingDirectory = Path.Combine(Path.GetTempFolder(), <font color=purple>"pkgtmp"</font>);
<font color=blue>foreach</font> (string fileKey in files.Keys)
{
<font color=blue>string</font> sourceFilePath = files[fileKey];
<font color=blue>string</font> destFilePath = pkg.Files[fileKey].SourcePath;
destFilePath = Path.Combine(pkg.WorkingDirectory, destFilePath);
File.Copy(sourceFilePath, destFilePath, <font color=blue>true</font>);
}
pkg.UpdateFiles(<font color=blue>new</font> ArrayList(files.Keys));
pkg.Commit();
Directory.Delete(pkg.WorkingDirectory, <font color=blue>true</font>);
}</font></pre><br />
<p>1. Create a <a href="DTFAPI.chm::/html/Overload_Microsoft_Deployment_WindowsInstaller_Package_InstallPackage__ctor.htm">new InstallPackage</a>
instance referring to the location of the .msi. This is actually just a specialized subclass of a Database.</p>
<p>2. Set the <a href="DTFAPI.chm::/html/P_Microsoft_Deployment_WindowsInstaller_Package_InstallPackage_WorkingDirectory.htm">WorkingDirectory</a>.
This is the root directory where the package expects to find the new source files.</p>
<p>3. Copy each file to its proper location in the working directory. The
<a href="DTFAPI.chm::/html/P_Microsoft_Deployment_WindowsInstaller_Package_InstallPackage_Files.htm">InstallPackage.Files</a>
property is used to look up the relative source path of each file.</p>
<p>4. Call <a href="DTFAPI.chm::/html/Overload_Microsoft_Deployment_WindowsInstaller_Package_InstallPackage_UpdateFiles.htm">InstallPackage.UpdateFiles</a>
with the list of file keys. This will re-compress and package the files if necessary, and also update the
following data: File.FileSize, File.Version, File.Language, MsiFileHash.HashPart*.</p>
<p>5. Commit the database changes and cleanup the working directory.</p>
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<p><b>See also:</b></p>
<ul>
<li><a href="wifile.htm">WiFile Sample Tool</a> - a more complete tool that expands on the above example.</li>
<li><a href="DTFAPI.chm::/html/T_Microsoft_Deployment_WindowsInstaller_Package_InstallPackage.htm">InstallPackage Class</a></li>
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