Getting Started with ASP.NET Core NumericTextBox Control

22 Apr 20225 minutes to read

This section briefly explains about how to include ASP.NET Core NumericTextBox control in your ASP.NET Core application using Visual Studio.

Prerequisites

System requirements for ASP.NET Core controls

Create ASP.NET Core web application with Razor pages

Install ASP.NET Core package in the application

Syncfusion ASP.NET Core controls are available in nuget.org. Refer to NuGet packages topic to learn more about installing NuGet packages in various OS environments. To add ASP.NET Core controls in the application, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search for Syncfusion.EJ2.AspNet.Core and then install it.

The Syncfusion.EJ2.AspNet.Core NuGet package has dependencies, Newtonsoft.Json for JSON serialization and Syncfusion.Licensing for validating Syncfusion license key.

Add Syncfusion ASP.NET Core Tag Helper

Open ~/Views/_ViewImports.cshtml file and import the Syncfusion.EJ2 TagHelper.

@addTagHelper *, Syncfusion.EJ2

Add style sheet

Checkout the Themes topic to learn different ways (CDN, NPM package, and CRG) to refer styles in ASP.NET Core application, and to have the expected appearance for Syncfusion ASP.NET Core controls. Here, the theme is referred using CDN inside the <head> of ~/Pages/Shared/_Layout.cshtml file as follows,

<head>
    ...
    <!-- Syncfusion ASP.NET Core controls styles -->
    <link rel="stylesheet" href="https://cdn.syncfusion.com/ej2/20.1.55/fluent.css" />
</head>

Add script reference

In this getting started walk-through, the required scripts are referred using CDN inside the <head> of ~/Pages/Shared/_Layout.cshtml file as follows,

<head>
    ...
    <!-- Syncfusion ASP.NET Core controls scripts -->
    <script src="https://cdn.syncfusion.com/ej2/20.1.55/dist/ej2.min.js"></script>
</head>

Register Syncfusion Script Manager

Open ~/Pages/Shared/_Layout.cshtml page and register the script manager at the end of `<body>` in the ASP.NET Core application as follows.

<body>
...
    <!-- Syncfusion ASP.NET Core Script Manager -->
    <ejs-scripts></ejs-scripts>
</body>

Add ASP.NET Core NumericTextBox control

Now, add the Syncfusion ASP.NET Core NumericTextBox tag helper in ~/Pages/Index.cshtml page.

<ejs-numerictextbox id="numeric" value="10" Type="text"></ejs-numerictextbox>

Press Ctrl+F5 (Windows) or +F5 (macOS) to run the app. Then, the Syncfusion ASP.NET Core NumericTextBox control will be rendered in the default web browser.

ASP.NET Core NumericTextBox Control

Range validation

You can set the minimum and maximum range of values in the NumericTextBox using the min and max properties, so the numeric value should be in the min and max range.

The validation behavior depends on the strictMode property.

The below example demonstrates range validation.

<ejs-numerictextbox id="numeric" step="2" value="16" min="10" max="20" Type="text"></ejs-numerictextbox>

Formatting the value

User can set the format of the NumericTextBox control using format property. The value will be displayed in the specified format, when the control is in focused out state. For more information about formatting the value, refer to this link.

The below example demonstrates format the value by using currency format value c2.

<ejs-numerictextbox id="numeric" value="10" format="c2" Type="text"></ejs-numerictextbox>

ASP.NET Core NumericTextBox with Formatting

Precision of numbers

You can restrict the number of decimals to be entered in the NumericTextBox by using the decimals and validateDecimalOnType properties.
So, you can’t enter the number whose precision is greater than the mentioned decimals.

  • If validateDecimalOnType is false, number of decimals will not be restricted.
    Else, number of decimals will be restricted while typing in the NumericTextBox.
<div id='container'>
    <div class='wrap'>
        <ejs-numerictextbox id="strict" value="10" validateDecimalOnType="true" decimals="3" format="n3" placeholder="ValidateDecimalOnType enabled" floatLabelType="Auto"></ejs-numerictextbox>
    </div>
    <div class='wrap'>
        <ejs-numerictextbox id="allow" value="10" decimals="3" format="n3" placeholder="ValidateDecimalOnType disabled" floatLabelType="Auto"></ejs-numerictextbox>
    </div>
</div>

Restricting Decimal Values in ASP.NET Core NumericTextBox

View Sample in GitHub

See also