{"id":15898,"date":"2022-10-13T11:42:07","date_gmt":"2022-10-13T06:12:07","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-is-there-a-way-to-access-t-method-in-a-new-instance-of-t-in-a-generic-method\/"},"modified":"2022-10-13T11:42:07","modified_gmt":"2022-10-13T06:12:07","slug":"solved-is-there-a-way-to-access-t-method-in-a-new-instance-of-t-in-a-generic-method","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-is-there-a-way-to-access-t-method-in-a-new-instance-of-t-in-a-generic-method\/","title":{"rendered":"[Solved] Is there a way to access T.Method() in a new instance of T in a generic method?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-61298284\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"61298284\" data-parentid=\"61297919\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>In a generic method, you can only access the methods defined by the constraint on <code>T<\/code> (unless you use reflection or type checking\/casting, both of which defeat the purpose of generics). If you constrain <code>T<\/code> to a <code>Character<\/code> (which I think you <em>have<\/em> to do to access <code>Name<\/code> and <code>Health<\/code>), then it should work (please post the <code>Character<\/code> class with relevant properties). But then in order to pass it a <code>Mage<\/code>, you&#8217;d have to have <code>Mage<\/code> inherit from <code>Character<\/code>.<\/p>\n<p>Here&#8217;s what I mean; first create an interface that defines properties that <em>all<\/em> characters will have (i.e. all public properties, methods, and events):<\/p>\n<pre><code>public interface ICharacter\n{\n    string Name { get; set; }\n    string Description { get; }\n    int Health { get; set; }\n}\n<\/code><\/pre>\n<p>Then we can create a base class called <code>Character<\/code> that implements the interface::<\/p>\n<pre><code>public class Character :  ICharacter\n{\n    public string Name { get; set; } = \"Default Character\";\n    public int Health { get; set; } = 5;\n    public string Description { get; protected set; } = \"Default Description\";\n}\n<\/code><\/pre>\n<p>Next we create some character types that inherit the <code>Character<\/code> class:<\/p>\n<pre><code>public class Mage : Character\n{\n    public Mage()\n    {\n        Name = \"Default Mage\";\n        Description = \"Someone who uses or practices magic \" + \n            \"derived from supernatural or occult sources.\";\n    }\n}\n\npublic class Elf : Character\n{\n    public Elf()\n    {\n        Name = \"Default Elf\";\n        Description = \"A supernatural creature of folk tales, \" + \n            \"typically represented as a small, elusive figure \" + \n            \"in human form with pointed ears, magical powers, \" + \n            \"and a capricious nature.\";\n    }\n}\n<\/code><\/pre>\n<p>So now we can constrian our generic type <code>T<\/code> to the <code>ICharacter<\/code> interface, and we can access the <code>Name<\/code> and <code>Health<\/code> properties:<\/p>\n<pre><code>class Program\n{\n    T CreateChar&lt;T&gt;() where T : ICharacter, new()\n    {\n        var result = new T();\n        result.Name += \" (created in 'CreateChar' method)\";  \/\/ Modify a property\n        return result;\n    }\n\n    \/\/ Rest of class omitted\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Is there a way to access T.Method() in a new instance of T in a generic method? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] In a generic method, you can only access the methods defined by the constraint on T (unless you use reflection or type checking\/casting, both of which defeat the purpose of generics). If you constrain T to a Character (which I think you have to do to access Name and Health), then it should work &#8230; <a title=\"[Solved] Is there a way to access T.Method() in a new instance of T in a generic method?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-is-there-a-way-to-access-t-method-in-a-new-instance-of-t-in-a-generic-method\/\" aria-label=\"More on [Solved] Is there a way to access T.Method() in a new instance of T in a generic method?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,559],"class_list":["post-15898","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-generics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Is there a way to access T.Method() in a new instance of T in a generic method? - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-is-there-a-way-to-access-t-method-in-a-new-instance-of-t-in-a-generic-method\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Is there a way to access T.Method() in a new instance of T in a generic method? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] In a generic method, you can only access the methods defined by the constraint on T (unless you use reflection or type checking\/casting, both of which defeat the purpose of generics). If you constrain T to a Character (which I think you have to do to access Name and Health), then it should work ... 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