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POProgrammatically generating typed DataSet for LINQ - "Metadata file" missing?
 

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  1. POProgrammatically generating typed DataSet for LINQ - "Metadata file" missing?
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    <p>Title says what i'm trying to do. I can successfully generate an assembly if i don't specify the <code>LinqOverTypedDatasets</code> option, but i want my typed DataSet to support queries with LINQ.</p> <p>My code outputs the error:</p> <p><code>error CS0006: Metadata file 'System.Data.DataSetExtensions.dll' could not be found</code></p> <p>The code:</p> <pre><code>//System.Data.DataSet myDataSet = &lt;&lt; assume myDataSet is valid DataSet object &gt;&gt;; Dictionary&lt;string, string&gt; options = new Dictionary&lt;string, string&gt;(); options.Add("CompilerVersion", "v3.5"); using (CSharpCodeProvider cscp = new CSharpCodeProvider(options)) { CodeNamespace ns = new CodeNamespace("DBSPPS"); CodeCompileUnit ccu = new CodeCompileUnit(); using (StringWriter schemaWriter = new StringWriter()) { myDataSet.WriteXmlSchema(schemaWriter); TypedDataSetGenerator.Generate(schemaWriter.ToString(), ccu, ns, cscp, TypedDataSetGenerator.GenerateOption.LinqOverTypedDatasets ); } StringWriter codeWriter = new StringWriter(); cscp.GenerateCodeFromNamespace(ns, codeWriter, new CodeGeneratorOptions()); CompilerParameters parameters = new CompilerParameters(); parameters.GenerateExecutable = false; parameters.OutputAssembly = "DBSPPS.dll"; parameters.ReferencedAssemblies.Add("System.dll"); parameters.ReferencedAssemblies.Add("System.Data.dll"); parameters.ReferencedAssemblies.Add("System.Xml.dll"); parameters.ReferencedAssemblies.Add("System.Data.DataSetExtensions.dll"); CompilerResults cr = cscp.CompileAssemblyFromSource(parameters,new string[]{ codeWriter.ToString() }); foreach (string msg in cr.Output) Console.WriteLine(msg); } </code></pre> <p><strong>EDIT: figured this out, corrected code appears above! :) The MSDN documentation is WRONG when it describes the setting the compiler version to 3.5. The value for CompilerVersion should be "v3.5" NOT "3.5" as the docs say.</strong></p> <p>I got the same compilation errors when i didn't reference required assembiles (System.dll, etc), which was fixed by adding them to the <code>ReferencedAssemblies</code> collection of the <code>CompilerParameters</code> object. However, when i received the error message about <code>System.Data.DataSetExtensions.dll</code>, adding that assembly to the <code>ReferencedAssemblies</code> still resulted in the same error.</p> <p>I noticed that <code>System.Data.DataSetExtensions.dll</code> isn't in the location i expected it to be (<code>\WINDOWS\Microsoft.NET\Framework\v3.5</code>), but in <code>\Program Files\Reference Assemblies\Microsoft\Framework\v3.5</code>. I tried specifying the full path, that didn't work either. I assumed that since the full path wasn't specified for the other referenced assemblies, it found them in the GAC. Is this not the case for <code>System.Data.DataSetExtensions.dll</code> ? Or is there something else going on?</p> <p>Thanks for your help.</p>
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    1. USMatt Crouch
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