{"id":32674,"date":"2023-02-01T01:46:45","date_gmt":"2023-01-31T20:16:45","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-do-i-update-a-value-in-c-and-sql-server-closed\/"},"modified":"2023-02-01T01:46:45","modified_gmt":"2023-01-31T20:16:45","slug":"solved-how-do-i-update-a-value-in-c-and-sql-server-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-do-i-update-a-value-in-c-and-sql-server-closed\/","title":{"rendered":"[Solved] How do I update a value in C# and SQL Server? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-22398760\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"22398760\" data-parentid=\"22398709\" data-score=\"3\" 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>You didn&#8217;t tell what is wrong exactly but I see a few things wrong in your code.<\/p>\n<ul>\n<li>You should always use <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/blog.codinghorror.com\/give-me-parameterized-sql-or-give-me-death\/\"><em>parameterized queries<\/em><\/a>. This kind of string concatenations are open for <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/en.wikipedia.org\/wiki\/SQL_injection\"><em>SQL Injection<\/em><\/a> attacks.<\/li>\n<li>I assume your <code>Scor<\/code> and <code>ID<\/code> columns are numeric, not character. That&#8217;s why you should not use single quotes with it. With parameterized queries, you don&#8217;t need to worry about that.<\/li>\n<li>Use <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/yh598w02.aspx\"><code>using<\/code> statement<\/a> to dispose your <code>SqlConnection<\/code> adn <code>SqlCommand<\/code>.<\/li>\n<li>In your second <code>SqlCommand<\/code> (which is <code>h<\/code>) you are executing first command (<code>up1<\/code>) not second one (<code>up2<\/code>).<\/li>\n<\/ul>\n<p>As an example;<\/p>\n<pre><code>void Update()\n{\n  using(SqlConnection c = new SqlConnection(co))\n  using(SqlCommand comm = c.CreateCommand())\n  {\n     string up1 = \"Update Scoruri Set Scor=@scor where ID=@id\";\n     comm.CommandText = up1;\n     comm.Parameters.AddWithValue(\"@scor\", Convert.ToInt32(scor1));\n     comm.Parameters.AddWithValue(\"@id\", otherForm.id1);\n     c.Open();  \n     comm.ExecuteNonQuery(); \n     comm.Parameters.Clear();\n     comm.Parameters.AddWithValue(\"@scor\", Convert.ToInt32(scor2));\n     comm.Parameters.AddWithValue(\"@id\", otherForm.id2);   \n     comm.ExecuteNonQuery();       \n  }\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">11<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How do I update a value in C# and SQL Server? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You didn&#8217;t tell what is wrong exactly but I see a few things wrong in your code. You should always use parameterized queries. This kind of string concatenations are open for SQL Injection attacks. I assume your Scor and ID columns are numeric, not character. That&#8217;s why you should not use single quotes with &#8230; <a title=\"[Solved] How do I update a value in C# and SQL Server? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-do-i-update-a-value-in-c-and-sql-server-closed\/\" aria-label=\"More on [Solved] How do I update a value in C# and SQL Server? [closed]\">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":[751,324,341,500],"class_list":["post-32674","post","type-post","status-publish","format-standard","hentry","category-solved","tag-asp-net","tag-c","tag-sql","tag-sql-server"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How do I update a value in C# and SQL Server? 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