Custom attribute declaration for methods

Question

I am using CodeDom to generate a class which include some methods. I was able to declare an attribute for my methods to look similar as what Pex does when it creates a parameterized unit test:

[PexMethod]
public void myMethod()

However I would like to include something more to it like:

[PexMethod (Max Branches = 1000)]
public void myMethod()

But I am not able to include the ((Max Branches = 1000)). Could you somebody help me a bit?

how to add [TestFixture] to a method using codedom – Lijo Jul 21 '16 at 12:37 — Lijo, Jul 21 '16 at 12:37

score 2 · Answer 1 · answered Apr 30 '12 at 21:13

2

You can't have spaces in the attribute values, they are just wrappers around public properties in your custom attributes class. For example:

public class TestAttribute : Attribute
{
    public bool Enabled { get; set; }
}

And you can use this like this

[TestAttribute(Enabled = true)]
void Foo(){}

So since the attribute maps to a property it has to follow normal syntactical naming rules.

answered Apr 30 '12 at 21:13

devshorts

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My bad, in fact the attribute should be without spaces [PexMethod(MaxBranches=1000)], but even so, how you do it with codeDom? – Peter Apr 30 '12 at 21:36
Sorry Peter, can't help ya there. I've never used codeDom, but if the attribute values have a public setter and it inherits from the attribute class you should be able to do this. – devshorts Apr 30 '12 at 21:41
Thanks anyway for the feedback :) – Peter May 01 '12 at 12:54

svick · Answer 2 · 2014-08-07T18:12:12.707

2

I'm not sure what your problem is, but you can simply set the Value property on CodeAttributeArgument:

var method =
    new CodeMemberMethod
    {
        Name = "MyMethod",
        CustomAttributes =
        {
            new CodeAttributeDeclaration
            {
                Name = "PexMethod",
                Arguments =
                {
                    new CodeAttributeArgument
                    {
                        Name = "MaxBranches",
                        Value = new CodePrimitiveExpression(1000)
                    }
                }
            }
        }
    };

edited Aug 07 '14 at 18:12

answered Apr 30 '12 at 21:39

svick

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I know this is a long shot, seeing as this thread is 2 years old, but how do I create arguments with enum values? [WebInvoke(Method = "POST", UriTemplate = "MyTemplate", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)] I've managed to do the strings, but I don't know what to do about the enums - RequestFormat = WebMessageFormat.Json and ResponseFormat = WebMessageFormat.Json – Shaggydog Aug 07 '14 at 15:55
Also, how would I go about creating this [FaultContract(typeof(Collection))] – Shaggydog Aug 07 '14 at 16:13
@Shaggydog You should ask a new question about that. – svick Aug 07 '14 at 18:07

score 0 · Answer 3 · answered Apr 30 '12 at 21:16

0

The MaxBranches property is on a base class (PexSettingsAttributeBase). That may be why you are having trouble. You may be reflecting over the wrong type to find the PropertyInfo to set.

answered Apr 30 '12 at 21:16

agent-j

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score 0 · Answer 4 · answered Jul 21 '16 at 13:13

    CodeAttributeArgument codeAttr = new CodeAttributeArgument(new CodePrimitiveExpression("Max Branches = 1000"));
     CodeAttributeDeclaration codeAttrDecl = new CodeAttributeDeclaration("PexMethod",codeAttr);

 mymethod.CustomAttributes.Add(codeAttrDecl);

Custom attribute declaration for methods

4 Answers4