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    File Manager

    Custom Thumbnails

    Documentation

    The FileManager widget allows you to provide custom thumbnails. Handle the customizeThumbnail event to specify how the widget presents files in folders.

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    ASP.NET Core

    ASP.NET MVC

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    $(function () { $("#file-manager").dxFileManager({ name: "fileManager", fileProvider: fileSystem, itemView: { mode: "thumbnails" }, height: 450, permissions: { create: true, copy: true, move: true, remove: true, rename: true }, customizeThumbnail: function (fileManagerItem) { if (fileManagerItem.isDirectory) return "../../../../images/thumbnails/folder.svg"; var fileExtension = fileManagerItem.getExtension(); switch (fileExtension) { case ".txt": return "../../../../images/thumbnails/doc-txt.svg"; break; case ".rtf": return "../../../../images/thumbnails/doc-rtf.svg"; break; case ".xml": return "../../../../images/thumbnails/doc-xml.svg"; break; } } }); });
    <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.7/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.7/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/19.1.7/js/dx.all.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="data.js"></script> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="file-manager"></div> </div> </body> </html>
    .dx-filemanager-details-item-thumbnail { height: 18px; width: 18px; }
    var fileSystem = [ { name: "Documents", isDirectory: true, items: [ { name: "Projects", isDirectory: true, items: [ { name: "About.rtf", isDirectory: false, size: 1024 }, { name: "Passwords.rtf", isDirectory: false, size: 2048 } ] }, { name: "About.xml", isDirectory: false, size: 1024 }, { name: "Managers.rtf", isDirectory: false, size: 2048 }, { name: "ToDo.txt", isDirectory: false, size: 3072 } ], }, { name: "Images", isDirectory: true, items: [ { name: "logo.png", isDirectory: false, size: 20480 }, { name: "banner.gif", isDirectory: false, size: 10240 } ] }, { name: "System", isDirectory: true, items: [ { name: "Employees.txt", isDirectory: false, size: 3072 }, { name: "PasswordList.txt", isDirectory: false, size: 5120 } ] }, { name: "Description.rtf", isDirectory: false, size: 1024 }, { name: "Description.txt", isDirectory: false, size: 2048 } ];