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The GridWeb control provides the ShowCellEditBox property, which developers can set to True to enable the toolbar. The default value of the attribute is False. When you set its value to True, the Edit Box will appear at the top of the GridWeb control.
To enable this feature, you need to import the jquery.js file into your project and reference it in your .aspx page(s) to make it work. You may download the jQuery archive from https://jqueryui.com/download/all/ and place the library file(s) into a folder in the project, then add a reference to the library file via a <script> tag in your .aspx web form as follows. All the latest jQuery versions are OK.
<head id="Head1" runat="server">
<title>Untitled Page</title>
<script type="text/javascript" src="/jquery/jquery.js"></script>
</head>
GridWeb control with Edit Box

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