{"id":34024,"date":"2023-02-20T10:01:19","date_gmt":"2023-02-20T04:31:19","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-upload-multiple-files-to-sharepoint-online-using-csom\/"},"modified":"2023-02-20T10:01:19","modified_gmt":"2023-02-20T04:31:19","slug":"solved-how-to-upload-multiple-files-to-sharepoint-online-using-csom","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-upload-multiple-files-to-sharepoint-online-using-csom\/","title":{"rendered":"[Solved] How to upload (multiple) files to SharePoint Online using CSOM?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-55603499\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"55603499\" data-parentid=\"55602021\" data-score=\"0\" 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>I tested the below code in my local environment; it works fine.<\/p>\n<pre><code>&lt;div&gt;\n    &lt;asp:FileUpload ID=\"upldGradeReport\" runat=\"server\" \/&gt;\n    &lt;asp:FileUpload ID=\"upldExpenseReceipt\" runat=\"server\" \/&gt;\n\n    &lt;asp:Button ID=\"btnSubmitForm\" OnClick=\"SubmitButton_Click\" runat=\"server\" Text=\"Submit\" \/&gt;\n&lt;\/div&gt;\n\n\nprotected void SubmitButton_Click(object sender, EventArgs e)\n{\n    sendToSharePoint();\n    Response.BufferOutput = true;\n    Response.Redirect(\"Submission.aspx\");\n}\n\nprotected void sendToSharePoint()\n{\n\n    try\n    {\n        string siteUrl = \"https:\/\/tenant.sharepoint.com\/sites\/lee\";\n\n        ClientContext clientContext = new ClientContext(siteUrl);\n        SecureString securePassword = new SecureString();\n        foreach (char c in \"password\".ToCharArray()) securePassword.AppendChar(c);\n        clientContext.Credentials = new SharePointOnlineCredentials(\"lee@tenant.onmicrosoft.com\", securePassword);                \n        string sDocName = string.Empty;\n        string sDocName1 = string.Empty;\n        Uri uri = new Uri(siteUrl);\n        string sSPSiteRelativeURL = uri.AbsolutePath;\n        sDocName = UploadFile(clientContext,upldGradeReport.FileContent, upldGradeReport.FileName, sSPSiteRelativeURL, \"MyDoc\");\n        sDocName1 = UploadFile(clientContext,upldExpenseReceipt.FileContent, upldExpenseReceipt.FileName, sSPSiteRelativeURL, \"MyDoc\");\n\n        \/\/prior CSOM code to insert values into a new List Item exists here\n\n        \/\/clientContext.ExecuteQuery();\n    }\n    catch (Exception ex)\n    {\n        String ThisError = ex.Message;\n    }\n}\n\npublic String UploadFile(ClientContext clientContext,Stream fs, string sFileName, string sSPSiteRelativeURL, string sLibraryName)\n{\n    string sDocName = string.Empty;\n    try\n    {\n        var sFileURL = String.Format(\"{0}\/{1}\/{2}\", sSPSiteRelativeURL, sLibraryName, sFileName);\n\n        Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, sFileURL, fs, true);\n        sDocName = sFileName;\n    }\n    catch (Exception ex)\n    {\n        sDocName = string.Empty;\n        \/\/SPErrorMsg = ex.Message;\n    }\n    return sDocName;\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">4<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to upload (multiple) files to SharePoint Online using CSOM? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] I tested the below code in my local environment; it works fine. &lt;div&gt; &lt;asp:FileUpload ID=&#8221;upldGradeReport&#8221; runat=&#8221;server&#8221; \/&gt; &lt;asp:FileUpload ID=&#8221;upldExpenseReceipt&#8221; runat=&#8221;server&#8221; \/&gt; &lt;asp:Button ID=&#8221;btnSubmitForm&#8221; OnClick=&#8221;SubmitButton_Click&#8221; runat=&#8221;server&#8221; Text=&#8221;Submit&#8221; \/&gt; &lt;\/div&gt; protected void SubmitButton_Click(object sender, EventArgs e) { sendToSharePoint(); Response.BufferOutput = true; Response.Redirect(&#8220;Submission.aspx&#8221;); } protected void sendToSharePoint() { try { string siteUrl = &#8220;https:\/\/tenant.sharepoint.com\/sites\/lee&#8221;; ClientContext clientContext = &#8230; <a title=\"[Solved] How to upload (multiple) files to SharePoint Online using CSOM?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-upload-multiple-files-to-sharepoint-online-using-csom\/\" aria-label=\"More on [Solved] How to upload (multiple) files to SharePoint Online using CSOM?\">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":[751,324,6039,4587,2880],"class_list":["post-34024","post","type-post","status-publish","format-standard","hentry","category-solved","tag-asp-net","tag-c","tag-csom","tag-sharepoint","tag-sharepoint-online"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How to upload (multiple) files to SharePoint Online using CSOM? - 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-how-to-upload-multiple-files-to-sharepoint-online-using-csom\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to upload (multiple) files to SharePoint Online using CSOM? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I tested the below code in my local environment; it works fine. &lt;div&gt; &lt;asp:FileUpload ID=&quot;upldGradeReport&quot; runat=&quot;server&quot; \/&gt; &lt;asp:FileUpload ID=&quot;upldExpenseReceipt&quot; runat=&quot;server&quot; \/&gt; &lt;asp:Button ID=&quot;btnSubmitForm&quot; OnClick=&quot;SubmitButton_Click&quot; runat=&quot;server&quot; Text=&quot;Submit&quot; \/&gt; &lt;\/div&gt; protected void SubmitButton_Click(object sender, EventArgs e) { sendToSharePoint(); Response.BufferOutput = true; Response.Redirect(&quot;Submission.aspx&quot;); } protected void sendToSharePoint() { try { string siteUrl = &quot;https:\/\/tenant.sharepoint.com\/sites\/lee&quot;; ClientContext clientContext = ... 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