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POUpdating <appname>.config file from an Custom Installer Class Action
 

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  1. POUpdating <appname>.config file from an Custom Installer Class Action
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    <p>I've tried updating my application's .config file during installer (<strong>via a .NET Installer Class Action</strong>). But, I can't seem to get ConfigurationManager to list any properties or be able to set anything.</p> <p>I learned of this approach from several stackoverflow posts that pointed me to this guide: <a href="http://raquila.com/software/configure-app-config-application-settings-during-msi-install/" rel="nofollow noreferrer">http://raquila.com/software/configure-app-config-application-settings-during-msi-install/</a></p> <p>I've investigated the differences between my project and his and noticed that my configuration files are formatted differently. I believe this has to do with the fact that i'm using "Settings" files. </p> <p>Config files formatted in the guide look like: </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;appSettings&gt; &lt;add key="Param1" value="" /&gt; &lt;add key="Param2" value="" /&gt; &lt;add key="Param3" value="" /&gt; &lt;/appSettings&gt; &lt;/configuration&gt; </code></pre> <p>Where mine looks like:</p> <pre><code> &lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;configSections&gt; &lt;sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" &gt; &lt;section name="MyAppName.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" /&gt; &lt;section name="MyAppName.Settings1" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" /&gt; &lt;/sectionGroup&gt; &lt;sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" &gt; &lt;section name="MyAppName.Settings1" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /&gt; &lt;/sectionGroup&gt; &lt;/configSections&gt; &lt;userSettings&gt; &lt;MyAppName.Properties.Settings&gt; &lt;setting name="TESTSETTING" serializeAs="String"&gt; &lt;value&gt;asdfasdfasdf&lt;/value&gt; &lt;/setting&gt; &lt;/MyAppName.Properties.Settings&gt; &lt;MyAppName.Settings1&gt; &lt;setting name="VerboseErrorMode" serializeAs="String"&gt; &lt;value&gt;False&lt;/value&gt; &lt;/setting&gt; &lt;applicationSettings&gt; &lt;MyAppName.Settings1&gt; &lt;setting name="RunOnStartup" serializeAs="String"&gt; &lt;value&gt;True&lt;/value&gt; &lt;/setting&gt; &lt;/MyAppName.Settings1&gt; &lt;/applicationSettings&gt; &lt;/configuration&gt; </code></pre> <p>To shed some light on what was going on... I tried printing out the list of settings like so:</p> <pre><code> Configuration config = ConfigurationManager.OpenExeConfiguration(exePath); // Try getting the Settings1 Section AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("Settings1"); // Also tried myNamespace.Settings1 if (appSettings != null) { valList = "Settings1: "; foreach (string key in appSettings.Settings.AllKeys) { string value = appSettings.Settings[key].Value; valList += ("Key: '" + key + "' = '" + value + "'\n"); } } else { valList = "appSettings was null"; } MessageBox.Show(valList); MessageBox.Show(valList); </code></pre> <p>I have tried several permutations of this... and in all cases output is "appSettings was null".</p> <p>I also tried initializing the configuration manager in several different ways...</p> <pre><code> Configuration config = ConfigurationManager.OpenExeConfiguration(exePath); MessageBox.Show("Section Count: " + config.Sections.Count); MessageBox.Show("Has File: " + config.HasFile); MessageBox.Show("Namespace Declared: " + config.NamespaceDeclared); config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); MessageBox.Show("Section Count: " + config.Sections.Count); MessageBox.Show("Has File: " + config.HasFile); MessageBox.Show("Namespace Declared: " + config.NamespaceDeclared); </code></pre> <p>For each of them the section count returned was 20. (I have no idea where the 20 comes from... I would have expected it to be 3).<br> HasFile was true for the first case and false for the second. <BR> Namespace Declared was false in both cases. </p> <p>Thanks!</p> <p><strong>EDIT (6-18-09):</strong> Still looking into this question. Anyone else have any ideas? Thanks.</p> <p>Search Keywords: "Object Reference Not Set to not set to an instance" &lt;-- this occurs when trying to write to a property. </p>
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