How to Validate Dynamically Added Text Boxes in a Table Using JavaScript and jQuery?

How to Add Validation to Dynamic Text Boxes in a Table

Understanding the Challenge

You have a table with dynamically generated rows containing text boxes. The goal is to add a CSS class (e.g., input-validation-error) to all text boxes in the table for client-side validation when a user clicks the "Save" button.

Implementing Client-Side Validation for Dynamic Text Boxes

1. Ensure Proper HTML Structure:

To enable client-side validation, you must include specific data-val attributes for required fields and message placeholders for validation messages. Additionally, hidden inputs are crucial for maintaining indexers when adding or removing rows.

2. Setting Up the JavaScript Function:

function AddTargetItem(TargetColor_U, D90Target_U, D10Target_U, TargetColor_V, D90Target_V, D10Target_V, Thickness, FilmWidth, TargetDate)  {
  var rowCount = $('#tbTargetDetails tr').length;
  var rowCountBil = rowCount + 1;

  var row = '<tr>

3. Handle Dynamically Added Rows:

When new rows are added, the jQuery Validation unobtrusive library needs to be reparsed.

  // Reparse the validator
  form.data('validator', null);
  $.validator.unobtrusive.parse(form); 

4. Removing Rows:

You can optionally handle removing rows by incorporating event handlers or utilizing a dedicated button within each row. Update the AddTargetItem function to consider scenarios like deleting rows or reassessing indices.

Additional Tips:

• Consider using CSS for styling instead of inline styles.
• Explore alternative approaches such as using a partial view to generate rows, offering more maintainability when adding/changing validation attributes.
• Remember to check your Models, Views, and JavaScript functions for errors and ensure they align with your intended logic.

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