Introduction

In this blog, we will discuss 3 tag helpers: Label, Textarea and Image Tag Helper. We will also discuss how to use them in application with an example.
Label Tag Helper: The label tag helper is used for text labels in an application. It renders as an HTML label tag.
Textarea Tag Helper: The Textarea tag helper is used for Textarea of description in the application. It renders as an HTML Textarea tag.
Image Tag Helper: The Image Tag Helper renders as an HTML img tag. It is used to display images in the core applications. It provides cache-busting behavior for static image files. It has scr and asp-append-version which is set to true.
Step 1 Create an ASP.NET web application project in Visual Studio 2019.
Step 2 Create a class employee under the Models folder.
  1. using System.ComponentModel.DataAnnotations;
  3. namespace LabelTextareaImageTagHelper__Demo.Models
  4. {
  5. public class Employee
  6. {
  7. [Key]
  8. public int Id { get; set; }
  10. [Required]
  11. public string Name { get; set; }
  13. [Required]
  14. public string Image { get; set; }
  16. [Required]
  17. [MinLength(10)]
  18. [MaxLength(255)]
  19. public string Description { get; set; }
  20. }
  21. }

Step 3 Now open index view from views than Home folder.

Step 4 Add model on top of the view to retrieve property of model class.

  1. @model LabelTextareaImageTagHelper__Demo.Models.Employee

Step 5 Create images folder in wwwroot folder copy and paste some image to display it on browser.

  1. <div class="form-group">
  2. <label asp-for="Name" class="control-label"></label>
  3. <input asp-for="Name" class="form-control" />
  4. </div>
  1. <div class="form-group">
  2. <label asp-for="Image" class="control-label"></label>
  3. <img src="~/images/855211650_154321.jpg" asp-append-version="true" height="150" width="150" class="img-thumbnail" />
  4. </div>
  1. <div class="form-group">
  2. <label asp-for="Description" class="control-label"></label>
  3. <textarea asp-for="Description" class="form-control"></textarea>
  4. </div>
This is how it renders in browser:
  1. <textarea class="form-control" data-val="true" data-val-maxlength="The field Description must be a string or array type with a maximum length of '255'." data-val-maxlength-max="255" data-val-minlength="The field Description must be a string or array type with a minimum length of '10'." data-val-minlength-min="10" data-val-required="The Description field is required." id="Description" maxlength="255" name="Description"></textarea>