{"id":2669,"date":"2022-08-30T15:26:47","date_gmt":"2022-08-30T15:26:47","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/02\/06\/click-on-a-link-on-c-webbrowser-to-start-download-a-file-and-also-its-link-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:26:47","modified_gmt":"2022-08-30T15:26:47","slug":"click-on-a-link-on-c-webbrowser-to-start-download-a-file-and-also-its-link-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/click-on-a-link-on-c-webbrowser-to-start-download-a-file-and-also-its-link-collection-of-common-programming-errors\/","title":{"rendered":"Click on a link on C# WebBrowser to start download a file and also its link-Collection of common programming errors"},"content":{"rendered":"<p>I am using a <code>C# WebBrowser<\/code> to navigate to a page. After navigate to that page I extract some link from its source code and then start to navigate to those sub_links in a loop which I get from its parent url.<\/p>\n<p>On every sub_links there is a link which is look like:<\/p>\n<pre><code>    Accept\n<\/code><\/pre>\n<p>the id of a button is <code>\"ctl00_UCDownloadFile1_Accept\"<\/code> is same in all its sub_links. When I click on above link manually a file start to download. I want to <code>\"click\"<\/code> on above button using c# code. I am able to <code>click<\/code> on above button using this code on <code>webBrowser1_DocumentCompleted event<\/code>:<\/p>\n<pre><code>HtmlElement elementById = webBrowser1.Document.GetElementById(\"ctl00_UCDownloadFile1_Accept\");\n            if (elementById != null)\n            {\n                elementById.InvokeMember(\"click\");\n                Application.DoEvents();\n            }\n<\/code><\/pre>\n<p>But a script error message box appear saying<\/p>\n<pre><code>\"An error has occured in the script on this page. \nError: The value of the property 'sysMT' is null or undefined, not a Function object.\nDo you want to continue running script on this page? \nYes     NO\"\n<\/code><\/pre>\n<p>Not able to understand what I am missing in this. Did Parent url make some cookie which helps to download the file? Don&#8217;t know how to download that file and also download file link.<\/p>\n<p>I am new to C# WebBrowser.<\/p>\n<blockquote>\n<p>Update<\/p>\n<\/blockquote>\n<p>I am able to remove a script error message box using<\/p>\n<pre><code>webBrowser2.ScriptErrorsSuppressed = true;\n<\/code><\/pre>\n<p>But not able to download all file which are their in sub links i.e.<\/p>\n<p>If I get 3 links from a parent url, then I navigate to first link, click on Accept link and then a box appear asking for a action to <code>RUN SAVE CANCEL.<\/code> But I get this box only for third (last) link. How to overcome with this problem, I want to download all file from each links without any prompt which asking for <code>RUN SAVE CANCEL.<\/code> Directly <code>SAVE<\/code> a file.<\/p>\n<p id=\"rop\"><small>Originally posted 2014-02-06 03:13:55. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>I am using a C# WebBrowser to navigate to a page. After navigate to that page I extract some link from its source code and then start to navigate to those sub_links in a loop which I get from its parent url. On every sub_links there is a link which is look like: Accept the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2669","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/2669","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=2669"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/2669\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=2669"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=2669"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=2669"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}