Clear Multi-value Lookup Via Jquery SP 2013

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Introduction

SharePoint 2013 provides a feature-rich platform for creating and managing web applications. One of the key features of SharePoint is its ability to create custom lists and libraries, which can be used to store and manage data. However, when it comes to editing items in these lists, users often encounter issues with multi-value lookup fields. In this article, we will explore how to clear a multi-value lookup field using jQuery in SharePoint 2013.

Understanding Multi-Value Lookup Fields

Multi-value lookup fields are a type of field in SharePoint that allows users to select multiple values from a list. These fields are commonly used in scenarios where a user needs to select multiple items from a list, such as selecting multiple categories for a product or selecting multiple tags for a blog post. However, when it comes to editing items in these lists, users often encounter issues with clearing the multi-value lookup field.

The Problem with Clearing Multi-Value Lookup Fields

When a user edits an item in a list, the multi-value lookup field is not cleared by default. This can lead to issues when the user tries to save the item, as the field may still contain the previous values. This can be particularly problematic in scenarios where the user needs to select new values for the field.

Using jQuery to Clear Multi-Value Lookup Fields

To clear a multi-value lookup field using jQuery in SharePoint 2013, we can use the following code:

$("input[id^='Test']").removeAttr('checked');

However, this code may not work as expected, as the removeAttr method only removes the specified attribute from the element. In the case of a multi-value lookup field, the attribute that needs to be removed is the checked attribute.

A Better Approach

A better approach to clearing a multi-value lookup field using jQuery is to use the following code:

$("input[id^='Test']").prop('checked', false);

This code uses the prop method to set the checked property of the element to false. This will clear the multi-value lookup field and allow the user to select new values.

Using the each Method

Another approach to clearing a multi-value lookup field using jQuery is to use the each method. This method allows us to iterate over a set of elements and perform an action on each element.

$("input[id^='Test']").each(function() {
    $(this).prop('checked', false);
});

This code uses the each method to iterate over the elements with the specified ID and sets the checked property of each element to false.

Using the filter Method

The filter method is another useful method in jQuery that allows us to filter a set of elements based on a specified condition.

$("input[id^='Test']").filter(function() {
    return $(this).is(':checked');
}).prop('checked', false);

This code uses the filter method to filter the elements with the specified ID and sets the checked property of each element to false.

Conclusion

In this article, we have explored how to clear a multi-value lookup field using jQuery in SharePoint 2013. We have discussed the problem with clearing multi-value lookup fields and provided several approaches to clearing these fields using jQuery. We have also discussed the use of the each method and the filter method in jQuery to clear multi-value lookup fields.

Best Practices

When working with multi-value lookup fields in SharePoint 2013, it is essential to follow best practices to ensure that the fields are cleared correctly. Here are some best practices to keep in mind:

  • Use the prop method to set the checked property of the element to false.
  • Use the each method to iterate over a set of elements and perform an action on each element.
  • Use the filter method to filter a set of elements based on a specified condition.
  • Avoid using the removeAttr method to remove the checked attribute from the element.

By following these best practices, you can ensure that your multi-value lookup fields are cleared correctly and that your users have a seamless experience when editing items in your SharePoint lists.

Common Issues

When working with multi-value lookup fields in SharePoint 2013, you may encounter some common issues. Here are some common issues to keep in mind:

  • The field is not cleared: If the field is not cleared after using the prop method or the each method, it may be due to the fact that the checked property is not being set to false. Try using the prop method or the each method with the checked property set to false.
  • The field is not updated: If the field is not updated after using the prop method or the each method, it may be due to the fact that the checked property is not being updated. Try using the prop method or the each method with the checked property set to false and then updating the field using the update method.
  • The field is not cleared when the user navigates away: If the field is not cleared when the user navigates away from the page, it may be due to the fact that the checked property is not being cleared. Try using the prop method or the each method with the checked property set to false and then clearing the field using the clear method.

By understanding these common issues, you can troubleshoot and resolve any issues that may arise when working with multi-value lookup fields in SharePoint 2013.

Conclusion

Q: What is a multi-value lookup field in SharePoint 2013?

A: A multi-value lookup field in SharePoint 2013 is a type of field that allows users to select multiple values from a list. These fields are commonly used in scenarios where a user needs to select multiple items from a list, such as selecting multiple categories for a product or selecting multiple tags for a blog post.

Q: Why is it difficult to clear a multi-value lookup field in SharePoint 2013?

A: It can be difficult to clear a multi-value lookup field in SharePoint 2013 because the field is not cleared by default when an item is edited. This can lead to issues when the user tries to save the item, as the field may still contain the previous values.

Q: How can I clear a multi-value lookup field using jQuery in SharePoint 2013?

A: You can clear a multi-value lookup field using jQuery in SharePoint 2013 by using the following code:

$("input[id^='Test']").prop('checked', false);

This code uses the prop method to set the checked property of the element to false.

Q: What is the difference between using the removeAttr method and the prop method to clear a multi-value lookup field?

A: The removeAttr method removes the specified attribute from the element, whereas the prop method sets the specified property of the element to a specified value. In the case of a multi-value lookup field, the prop method is a better approach because it sets the checked property to false, which clears the field.

Q: Can I use the each method to clear a multi-value lookup field?

A: Yes, you can use the each method to clear a multi-value lookup field. The each method allows you to iterate over a set of elements and perform an action on each element.

$("input[id^='Test']").each(function() {
    $(this).prop('checked', false);
});

This code uses the each method to iterate over the elements with the specified ID and sets the checked property of each element to false.

Q: Can I use the filter method to clear a multi-value lookup field?

A: Yes, you can use the filter method to clear a multi-value lookup field. The filter method allows you to filter a set of elements based on a specified condition.

$("input[id^='Test']").filter(function() {
    return $(this).is(':checked');
}).prop('checked', false);

This code uses the filter method to filter the elements with the specified ID and sets the checked property of each element to false.

Q: What are some common issues that I may encounter when clearing a multi-value lookup field in SharePoint 2013?

A: Some common issues that you may encounter when clearing a multi-value lookup field in SharePoint 2013 include:

  • The field is not cleared: If the field is not cleared after using the prop method or the each method, it may be due to the fact that the checked property is not being set to false. Try using the prop method or the each method with the checked property set to false.
  • The field is not updated: If the field is not updated after using the prop method or the each method, it may be due to the fact that the checked property is not being updated. Try using the prop method or the each method with the checked property set to false and then updating the field using the update method.
  • The field is not cleared when the user navigates away: If the field is not cleared when the user navigates away from the page, it may be due to the fact that the checked property is not being cleared. Try using the prop method or the each method with the checked property set to false and then clearing the field using the clear method.

Q: How can I troubleshoot issues with clearing a multi-value lookup field in SharePoint 2013?

A: To troubleshoot issues with clearing a multi-value lookup field in SharePoint 2013, you can try the following:

  • Check the JavaScript console for errors: If there are any errors in the JavaScript console, it may indicate a problem with the code that is clearing the field.
  • Use the browser's developer tools: The browser's developer tools can help you to identify the issue and debug the code.
  • Check the SharePoint logs: The SharePoint logs can provide information about any errors that may have occurred when clearing the field.

By following these steps, you can troubleshoot and resolve any issues that may arise when clearing a multi-value lookup field in SharePoint 2013.