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.NET Forum / Languages / C# / January 2008get all class attributes
Hello everybody, Trying to get all attributes from a class (class1), I got them through properties, is it a simple way to get all class atributes not using their properties?? public void GetAllClassAttributes() { Type classType = class1.GetType(); PropertyInfo[] a_pi= classType.GetProperties(); foreach ( PropertyInfo pi in a_pi) { if ( pi.CanRead ) pi.GetValue(resumen, null).ToString(); } Console.Read(); } You need to make the distinction between attributes applied to the class and those applied to the class members. For a class, or more properly a type, you can use GetType().Attributes. For other members you would go via the TypeDescriptor to obtain the MemberInfo objects for the members you were interested in such as properties, fields and methods.  SignatureBob Powell [MVP] Visual C#, System.Drawing Ramuseco Limited .NET consulting http://www.ramuseco.com Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm All new articles provide code in C# and VB.NET. Subscribe to the RSS feeds provided and never miss a new article. > Hello everybody, > [quoted text clipped - 12 lines] > Console.Read(); > } > For other members you would go via the TypeDescriptor to obtain the > MemberInfo objects for the members you were interested in such as > properties, fields and methods. Unless I missed it, TypeDescriptor doesn't really yield MemberInfo instances - that is the reflection world. You can get at PropertyDescriptors and EventDescriptors, but not fields (since component-model [=TypeDescriptor] isn't implementation-specific, but fields are /usually/ an implementation detail). To get at MemberInfo (including FieldInfo) you would use the Type directly. Marc You're right about the detail. Posting while tired ;-) Signature-- Bob Powell [MVP] Visual C#, System.Drawing Ramuseco Limited .NET consulting http://www.ramuseco.com Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm All new articles provide code in C# and VB.NET. Subscribe to the RSS feeds provided and never miss a new article. >> For other members you would go via the TypeDescriptor to obtain the >> MemberInfo objects for the members you were interested in such as [quoted text clipped - 10 lines] > > Marc You are getting the property values, not attributes here. If you want the attributes on the class, then you need to call the GetCustomAttributes method on the Type instance for that method. If you are asking how to get all the values on all the properties exposed by a type, then what you are doing is the best way. Signature- Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com > Hello everybody, > [quoted text clipped - 12 lines] > Console.Read(); > } > If you are asking how to get all the values on all the properties > exposed by a type, then what you are doing is the best way. Without trying to labor the point, I'd say that it is still definitely a two-horse race between reflection and component-model; with component-model you get access to dynamic properties (such as the columns on a DataView, or the extra [contextual] properties that appear in the Visual Studio property window) - plus it can be several orders of magnitude quicker than reflection if you need it to be (but you can't speed up reflection). Some similar code using component-model (not quite sure if it does what the OP's does, since it doesn't output anything...) object obj = //whatever foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(obj)) { Console.WriteLine(pd.GetValue(obj)); } But that's just my tuppence... Marc > Trying to get all attributes from a class (class1), I got them through > properties, is it a simple way to get all class atributes not using > their properties?? > ... > Type classType = class1.GetType(); I really think that the right terminology would help here... first "class1" appears to be an object, not a class - and you appear to be obtaing the values of instance properties, nothing to do with attributes. It also isn't clear whether "class1" and "resumen" are the same thing, or what the code is intended to do (since it doesn't output anything). This is not intended as criticism; just so that you know the right terms etc in case you want to clarify what you mean. Marc Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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