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POHow to import a .NET DLL having App.config with a configuration section handler?
 

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  1. POHow to import a .NET DLL having App.config with a configuration section handler?
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    <p>I am trying to use a DLL from our in-house .net application.</p> <p>The DLL has a App.config file, and has a config section that specifies a configuration handler.</p> <p>I am unable to get my PowerShell script to load this dll.</p> <p>I have boiled the problem down into the simplest form I can.</p> <p>Here is the PowerShel script I am trying:</p> <pre><code>[appdomain]::CurrentDomain.SetData("APP_CONFIG_FILE", "D:\CustomConfig\CustomConfig\CustomConfigTestHarness\bin\Debug\CustomConfigTestHarness.exe.config") Add-Type -Path 'D:\CustomConfig\CustomConfig\CustomConfigTestHarness\bin\Debug\CustomConfig.dll' $mainClass = New-Object CustomConfig.Main $mainClass.TestConfig() </code></pre> <p>This is the config file:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;configSections&gt; &lt;section name="PrimarySqlServers" type="CustomConfig.ServerConfiguration, CustomConfig" /&gt; &lt;/configSections&gt; &lt;PrimarySqlServers&gt; &lt;Server name="data source=SQL\SQL2005; Initial Catalog=master; Trusted_Connection=yes;"/&gt; &lt;/PrimarySqlServers&gt; &lt;/configuration&gt; </code></pre> <p>Here is the DLL:</p> <pre><code>namespace CustomConfig { public class Main { public string TestEcho(string message) { return message; } public string TestConfig() { Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); string sectionName = "PrimarySqlServers"; ServerConfiguration serverConfiguration = configuration.GetSection(sectionName) as ServerConfiguration; if (serverConfiguration == null || serverConfiguration.ServerList.Count == 0) { throw new ConfigurationErrorsException(string.Format(CultureInfo.InvariantCulture, "ERR_MISSING_OR_EMPTY_SECTION", sectionName)); } ServerConfigurationEntry entry = serverConfiguration.ServerList[0]; { return entry.Name; } } } } </code></pre> <p>The configClass.cs file reads:</p> <pre><code>using System; using System.Configuration; using System.Diagnostics; namespace CustomConfig { /// &lt;summary&gt; /// Contains individual configuration information about a site to be deployed /// &lt;/summary&gt; public class ServerConfiguration : ConfigurationSection { /// &lt;summary&gt; /// Get the collection of assembly items /// &lt;/summary&gt; [ConfigurationProperty("", IsDefaultCollection = true)] public ServerConfigurationCollection ServerList { get { return (ServerConfigurationCollection) base[""]; } } } /// &lt;summary&gt; /// ContextCollection - represents the collection of context nodes /// &lt;/summary&gt; public class ServerConfigurationCollection : ConfigurationElementCollection { /// &lt;summary&gt; /// Get the assembly item element with the given name /// &lt;/summary&gt; /// &lt;param name="name"&gt;The name of the item you want&lt;/param&gt; /// &lt;returns&gt;The item specified&lt;/returns&gt; public new ServerConfigurationEntry this[string name] { get { if (IndexOf(name) &lt; 0) return null; return (ServerConfigurationEntry) BaseGet(name); } } /// &lt;summary&gt; /// Get a assembly item element by index /// &lt;/summary&gt; /// &lt;param name="index"&gt;The index of the item to get&lt;/param&gt; /// &lt;returns&gt;The item specified&lt;/returns&gt; public ServerConfigurationEntry this[int index] { get { return (ServerConfigurationEntry) BaseGet(index); } } /// &lt;summary&gt; /// Clear the collection of items /// &lt;/summary&gt; public void Clear() { BaseClear(); } /// &lt;summary&gt; /// Add a new item to the collection /// &lt;/summary&gt; /// &lt;param name="name"&gt;The name of the site to add&lt;/param&gt; public void AddItem(string name) { ServerConfigurationEntry newEntry = new ServerConfigurationEntry(); newEntry.Name = name; this.BaseAdd(newEntry, true); } /// &lt;summary&gt; /// Get the index of a given assembly item /// &lt;/summary&gt; /// &lt;param name="name"&gt;The name of the item to get the index of&lt;/param&gt; /// &lt;returns&gt;The index of the given item, or -1 if not found&lt;/returns&gt; public int IndexOf(string name) { for (int index = 0; index &lt; base.Count; index++) { if (string.Compare(this[index].Name, name, StringComparison.OrdinalIgnoreCase) == 0) return index; } return -1; } /// &lt;summary&gt; /// Get the type of collection. BasicMap in this case. /// &lt;/summary&gt; public override ConfigurationElementCollectionType CollectionType { get { return ConfigurationElementCollectionType.BasicMap; } } /// &lt;summary&gt; /// Factory up a new element /// &lt;/summary&gt; /// &lt;returns&gt;A new element&lt;/returns&gt; protected override ConfigurationElement CreateNewElement() { return new ServerConfigurationEntry(); } /// &lt;summary&gt; /// Get the unique key for a assembly item element /// &lt;/summary&gt; /// &lt;param name="element"&gt;The element to get the key for&lt;/param&gt; /// &lt;returns&gt;A unique identifier for the element&lt;/returns&gt; protected override object GetElementKey(ConfigurationElement element) { return ((ServerConfigurationEntry) element).Name; } /// &lt;summary&gt; /// Get the XML element name for elements of this type /// &lt;/summary&gt; protected override string ElementName { get { return "Server"; } } } /// &lt;summary&gt; /// ContextElement - represents a single context element in the config /// &lt;/summary&gt; [DebuggerDisplay("{Name}")] public class ServerConfigurationEntry : ConfigurationElement { private const string NAME = "name"; /// &lt;summary&gt; /// Get or set the server name or connection string /// &lt;/summary&gt; [ConfigurationProperty(NAME, DefaultValue = "", IsRequired = true, IsKey = true)] public string Name { [DebuggerStepThrough] get { return (string) this[NAME]; } [DebuggerStepThrough] set { this[NAME] = value; } } } } </code></pre> <p>The error message I get when I try to run it is:</p> <pre><code> Exception calling `"TestConfig" with "0" argument(s)`: "An error occurred creating the configuration section handler for PrimarySqlServers: Could not load file or assembly 'CustomConfig' or one of its dependencies. The system cannot find the file specified. (D:\CustomConfig\CustomConfig\CustomConfigTestHarness\bin\Debug\CustomConfigTestHarness.exe.config line 4)" At C:\dll.ps1:15 char:1 + $mainClass.TestConfig() + ~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : ConfigurationErrorsException </code></pre>
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    1. PTQuestion
    1. USStuart Whelan
    1. USStuart Whelan
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      1. POHow to import a .NET DLL having App.config with a configuration section handler?
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      1. POHow to import a .NET DLL having App.config with a configuration section handler?
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      1. POHow to import a .NET DLL having App.config with a configuration section handler?
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    1. COAs far as I can see, CustomConfig.ServerConfiguration is not defined anywhere
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      1. POHow to import a .NET DLL having App.config with a configuration section handler?
      1. USKieren Johnstone
    2. CODoes the TestEcho method work? If not, you might check http://stackoverflow.com/questions/2094694/how-can-i-run-powershell-with-the-net-4-runtime
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      1. POHow to import a .NET DLL having App.config with a configuration section handler?
      1. USnickvane
    3. COThanks for looking at my question. Yes, TestEcho works okay.
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      1. POHow to import a .NET DLL having App.config with a configuration section handler?
      1. USStuart Whelan
 

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