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How to prevent ASP.Net website from throwing HttpUnhandledException when browsing paged listing of items

As a web developer, you may have encountered the dreaded HttpUnhandledException while browsing through a paged listing of items on your ASP....

As a web developer, you may have encountered the dreaded HttpUnhandledException while browsing through a paged listing of items on your ASP.Net website. This error can be frustrating and can hinder the user experience, leading to a negative impact on your website's performance. But fear not, in this article, we will discuss how you can prevent this issue and ensure a smooth browsing experience for your users.

Firstly, let's understand what causes this HttpUnhandledException. This error occurs when the page size of your paged listing of items is larger than the default maximum size configured in the web.config file. By default, the maximum page size is set to 4 MB, and if your paged listing of items exceeds this limit, it will result in an unhandled exception.

To prevent this error, you can either increase the maximum page size in the web.config file or implement paging on your website. Let's dive into these solutions in detail.

1. Increase the maximum page size in the web.config file:

To increase the maximum page size, you need to add the following code in the <system.web> section of your web.config file:

<httpRuntime maxRequestLength="10" />

In the above code, the maxRequestLength attribute sets the maximum page size to 10 MB. You can adjust this value as per your requirement. However, keep in mind that setting a large page size can lead to slower page loading times, affecting your website's performance.

2. Implement paging on your website:

Paging is a technique that divides large data sets into smaller chunks, making it easier to navigate through them. By implementing paging on your website, you can limit the number of items displayed on each page, ensuring that the page size remains within the limit.

To implement paging, you can use the built-in features of ASP.Net, such as the DataPager control or the GridView control's paging properties. These controls provide easy-to-use functionalities for implementing paging on your website without much hassle.

Another approach is to use client-side pagination, where the data is divided into smaller chunks on the client-side, reducing the server load and preventing the HttpUnhandledException. Libraries like jQuery DataTables and Bootstrap Table can help you achieve this.

Additionally, you can also optimize your database queries to improve the performance of your paged listing of items. By using techniques such as indexing, caching, and optimizing SQL queries, you can reduce the page's load time and prevent the occurrence of HttpUnhandledException.

In conclusion, the HttpUnhandledException can be avoided by either increasing the maximum page size or implementing paging on your website. However, it is recommended to use paging as it not only prevents the error but also improves the user experience by making the navigation easier. Furthermore, optimizing your database queries can also significantly impact your website's performance. By following these methods, you can ensure a smooth and error-free browsing experience for your users.

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