Getting Started with the DatePicker

This tutorial explains how to set up a basic Telerik UI for ASP.NET Core DatePicker and highlights the major steps in the configuration of the component.

You will initialize a DatePicker component and set a default value. Finally, you can run the sample code in Telerik REPL and continue experimenting with different configurations.

Prerequisites

To successfully complete the tutorial, you need a project that is already configured to use the Telerik UI for ASP.NET Core components:

• You can use the Telerik REPL playground and skip installing the components on your system and configuring a project.

• You can prepare a Visual Studio project by following either of these guides:

  • Creating a new pre-configured project for the Telerik UI for ASP.NET Core components from a project template.

  • Manually configuring an existing project as described in the First Steps on Windows or First Steps on Mac articles.

1. Prepare the CSHTML File

The first step is to add the required directives at the top of the .cshtml document:

• To use the Telerik UI for ASP.NET Core HtmlHelpers:

  @using Kendo.Mvc.UI
  

• To use the Telerik UI for ASP.NET Core TagHelpers:

  @addTagHelper *, Kendo.Mvc
  

2. Initialize the DatePicker

Use the DatePicker HtmlHelper or TagHelper to add the component to the page:

• The Name() configuration method is mandatory as its value is used for the id and the name attributes of the DatePicker element.
• The Label() configuration specifies the label text of the DatePicker.

Do not set the Name() option when using DatePickerFor. The [ComponentName]For method automatically sets the control's Name() to the field it is bound to. For more information, see the Fundamentals article.

    @(Html.Kendo().DatePicker()
        .Name("datepicker")
        .Label(label=>{
            label.Content("DatePicker:");
        })
    )

    @addTagHelper *, Kendo.Mvc

    <kendo-datepicker name="datepicker">
        <label content="DatePicker:" />
    </kendo-datepicker>

3. Set a Default Value

The next step is to set a default value. The following example shows how to use the .Value() method of the DatePicker, to set the current date as a value of the component.

    @{
       var defaultDatePicker = DateTime.Now;
    }

    @(Html.Kendo().DatePicker()
        .Name("datepicker")
        .Label(label=>{
            label.Content("DatePicker:");
        })
        .Value(defaultDatePicker)
    )

    @addTagHelper *, Kendo.Mvc
    @{
         var defaultDatePicker = DateTime.Now;
    }

    <kendo-datepicker name="datepicker" value="defaultDatePicker">
        <label content="DatePicker:" />
    </kendo-datepicker>

4. Handle the DatePicker Events

The DatePicker component exposes convenient events for implementing custom logic. In this example, you will use the Change() event to log the value of the selected item in the browser's console.

    @{
       var defaultDatePicker = DateTime.Now;
    }

    @(Html.Kendo().DatePicker()
        .Name("datepicker")
        .Label(label=>{
            label.Content("DatePicker:");
        })
        .Value(defaultDatePicker)
        .Events(e=>e.Change("onChange"))
    )

    @addTagHelper *, Kendo.Mvc
    @{
         var defaultDatePicker = DateTime.Now;
    }

    <kendo-datepicker name="datepicker" value="defaultDatePicker"
        on-change="onChange">
        <label content="DatePicker:" />
    </kendo-datepicker>

    function onChange(e){
        var datePicker = e.sender;
        console.log(datePicker.value());
    }

5. (Optional) Reference Existing DatePicker Instances

To use the client-side API of the DatePicker and build on top of its initial configuration, you need a reference to the DatePicker instance:

1. Use the .Name() (id attribute) of the component instance to get a reference.

       <script>
           $(document).ready(function() {
               var datepickerReference = $("#datepicker").data("kendoDatePicker"); // datepickerReference is a reference to the existing DatePicker instance of the helper.
           })
       </script>
   

2. Use the DatePicker client-side API to control the behavior of the control. In this example, you will use the enable method to disable the input.

       <script>
           $(document).ready(function() {
               var datepicker = $("#datepicker").data("kendoDatePicker");
   
               //Use the "value" API method to get the DatePicker's value.
               console.log(datepicker.value());
           })
       </script>
   

Explore this Tutorial in REPL

You can continue experimenting with the code sample above by running it in the Telerik REPL server playground:

• Sample code with the DatePicker HtmlHelper
• Sample code with the DatePicker TagHelper

Next Steps

• Subscribing to DatePicker Events
• Customizing the Appearance of the DatePicker

See Also

• Using the API of the DatePicker for ASP.NET Core (Demo)
• Client-Side API of the DatePicker
• Server-Side API of the DatePicker
• Knowledge Base Section