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A comprehensive guide to fixing the 'PropertyOrFieldNotInitializedException' error in SharePoint Online while retrieving a list name by GUID using C# .
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This video is based on the question https://stackoverflow.com/q/68350616/ asked by the user 'AlHal' ( https://stackoverflow.com/u/11558347/ ) and on the answer https://stackoverflow.com/a/68359595/ provided by the user 'Michael Han' ( https://stackoverflow.com/u/11663071/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Retrieve the SharePoint Online List Name from GUID in C#

When working with SharePoint Online in C# , a common challenge developers face is retrieving the title of a list using its GUID (Globally Unique Identifier). This becomes even more complex when errors arise during the execution of code. A specific error you might encounter is:

[[See Video to Reveal this Text or Code Snippet]]

In this guide, we'll break down why this error occurs and provide a clear solution to effectively retrieve the list name using its GUID without running into this problem.

Understanding the Error

Before we delve into the solution, it’s important to understand the root cause of the PropertyOrFieldNotInitializedException error. This error typically arises when your code attempts to access a property (in this case, Title) that hasn't been loaded or initialized properly.

Key Points about the Error:

The requested field needs to be explicitly loaded using the SharePoint Client Context.

If the query has not been executed, accessing any of the fields will result in this error.

The Original Code Breakdown

Here’s the original code snippet provided that triggered the error:

[[See Video to Reveal this Text or Code Snippet]]

Issues Identified:

The list's title is being accessed directly without first loading the specific list object using its GUID.

The Solution

To resolve this error and correctly retrieve the list title by its GUID, you need to adjust the code to ensure that the list object is explicitly loaded before accessing its properties.

Revised Code

The following code snippet demonstrates how to properly load a list by its GUID and retrieve its title:

[[See Video to Reveal this Text or Code Snippet]]

Explanation:

Fetching the List: You begin by retrieving the list using the GetById method with the provided listGUID.

Loading the List Object: The Load method is called on the client context, which ensures that the necessary properties of the list (including the Title) are loaded.

Executing the Query: The ExecuteQuery method finalizes the request, ensuring that the properties are now initialized and can be safely accessed.

Retrieving the Title: Finally, you can access the list’s Title property without encountering previous errors.

Conclusion

In this guide, we've discussed how to effectively handle the retrieval of a SharePoint Online list name by GUID in C# . By understanding the common error and applying the revised code, developers can avoid pitfalls and access the properties they need without facing initialization issues.

By following this structured approach, you can make your interactions with SharePoint Online more efficient and less error-prone. Happy coding!