{"id":2256,"date":"2024-03-12T09:29:04","date_gmt":"2024-03-12T09:29:04","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/"},"modified":"2024-04-18T15:09:33","modified_gmt":"2024-04-18T15:09:33","slug":"how-to-retrieve-a-value-from-a-c-dictionary-using-a-key","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/","title":{"rendered":"How to retrieve a value from a C# dictionary using a key?"},"content":{"rendered":"<p>In <a href=\"https:\/\/en.wikipedia.org\/wiki\/C_Sharp_(programming_language)\">C#<\/a>, you can retrieve values by key using the TryGetValue method of a Dictionary or by directly using the [key] index operator.<\/p>\n<ol>\n<li>Utilize the TryGetValue method:<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>Dictionary&lt;<span class=\"hljs-built_in\">string<\/span>, <span class=\"hljs-built_in\">int<\/span>&gt; dict = <span class=\"hljs-keyword\">new<\/span> Dictionary&lt;<span class=\"hljs-built_in\">string<\/span>, <span class=\"hljs-built_in\">int<\/span>&gt;();\r\ndict.Add(<span class=\"hljs-string\">\"key1\"<\/span>, <span class=\"hljs-number\">100<\/span>);\r\ndict.Add(<span class=\"hljs-string\">\"key2\"<\/span>, <span class=\"hljs-number\">200<\/span>);\r\n\r\n<span class=\"hljs-built_in\">int<\/span> <span class=\"hljs-keyword\">value<\/span>;\r\n<span class=\"hljs-keyword\">if<\/span> (dict.TryGetValue(<span class=\"hljs-string\">\"key1\"<\/span>, <span class=\"hljs-keyword\">out<\/span> <span class=\"hljs-keyword\">value<\/span>))\r\n{\r\n    Console.WriteLine(<span class=\"hljs-string\">\"Value for key1: \"<\/span> + <span class=\"hljs-keyword\">value<\/span>);\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Utilize the indexing operator [key]:<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>Dictionary&lt;<span class=\"hljs-built_in\">string<\/span>, <span class=\"hljs-built_in\">int<\/span>&gt; dict = <span class=\"hljs-keyword\">new<\/span> Dictionary&lt;<span class=\"hljs-built_in\">string<\/span>, <span class=\"hljs-built_in\">int<\/span>&gt;();\r\ndict.Add(<span class=\"hljs-string\">\"key1\"<\/span>, <span class=\"hljs-number\">100<\/span>);\r\ndict.Add(<span class=\"hljs-string\">\"key2\"<\/span>, <span class=\"hljs-number\">200<\/span>);\r\n\r\n<span class=\"hljs-built_in\">int<\/span> <span class=\"hljs-keyword\">value<\/span> = dict[<span class=\"hljs-string\">\"key1\"<\/span>];\r\nConsole.WriteLine(<span class=\"hljs-string\">\"Value for key1: \"<\/span> + <span class=\"hljs-keyword\">value<\/span>);\r\n<\/code><\/pre>\n<p>Note: When using the indexing operator [key], if the specified key does not exist in the dictionary, a KeyNotFoundException exception will be thrown. It is therefore best to use the TryGetValue method to avoid potential exceptions.<\/p>\n<p>&nbsp;<\/p>\n<p>More tutorials<\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-is-the-usage-of-jsonobject-in-android\/\" target=\"_blank\" rel=\"noopener\">How is the usage of JSONObject in Android?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-i-include-new-entries-in-a-python-dictionary\/\" target=\"_blank\" rel=\"noopener\">How can I include new entries in a Python dictionary?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-do-you-call-autoresetevent-in-c\/\" target=\"_blank\" rel=\"noopener\">How do you call AutoResetEvent in C#?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-a-pandas-dataframe-be-acquired-from-an-api-endpoint-that-lacks-order\/\" target=\"_blank\" rel=\"noopener\">get pandas DataFrame from an API endpoint that lacks order?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-properties-files-be-read-in-python\/\" target=\"_blank\" rel=\"noopener\">How can properties files be read in Python?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-is-winforms-implemented-in-c\/\" target=\"_blank\" rel=\"noopener\">How is WinForms implemented in C#?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C#, you can retrieve values by key using the TryGetValue method of a Dictionary or by directly using the [key] index operator. Utilize the TryGetValue method: Dictionary&lt;string, int&gt; dict = new Dictionary&lt;string, int&gt;(); dict.Add(&#8220;key1&#8221;, 100); dict.Add(&#8220;key2&#8221;, 200); int value; if (dict.TryGetValue(&#8220;key1&#8221;, out value)) { Console.WriteLine(&#8220;Value for key1: &#8221; + value); } Utilize the indexing [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2256","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to retrieve a value from a C# dictionary using a key? - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"In C#, you can retrieve values by key using the TryGetValue method of a Dictionary or by directly using the [key] index operator.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to retrieve a value from a C# dictionary using a key?\" \/>\n<meta property=\"og:description\" content=\"In C#, you can retrieve values by key using the TryGetValue method of a Dictionary or by directly using the [key] index operator.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-12T09:29:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-18T15:09:33+00:00\" \/>\n<meta name=\"author\" content=\"Noah Thompson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Noah Thompson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/\"},\"author\":{\"name\":\"Noah Thompson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/2e83cc6ab9f60d36921c2d0f9f280f4a\"},\"headline\":\"How to retrieve a value from a C# dictionary using a key?\",\"datePublished\":\"2024-03-12T09:29:04+00:00\",\"dateModified\":\"2024-04-18T15:09:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/\"},\"wordCount\":168,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-retrieve-a-value-from-a-c-dictionary-using-a-key\/\",\"name\":\"How to retrieve a value from a C# dictionary using a key? 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