ASP.NET

Cross-Origin Resource Sharing (CORS) is a crucial security feature in modern web development that controls how web pages in one domain can request and interact with resources from another domain. When working with ASP.NET WebAPI, implementing CORS correctly is essential for enabling third-party applications to access your API endpoints securely. Understanding the CORS Challenge The CORS issue typically arises when your WebAPI is hosted on one domain, and client applications attempt to access it from different domains. Browsers enforce the Same-Origin Policy by default, which prevents web pages from making requests to a different domain than the one that served the original page. This security measure is important but can be problematic when you need to allow legitimate cross-origin requests. ...

AJAX has revolutionized web development by enabling dynamic, asynchronous interactions that enhance user experience. However, when implementing AJAX in an ASP.NET environment with cookieless forms authentication, developers face unique challenges that require careful consideration. This article explores these challenges and provides practical solutions based on real-world implementation experience. The Development Context In a recent project, we faced the challenge of converting a web application that heavily relied on AJAX functionality. The application served as a dashboard with multiple widgets and controls, requiring both robust session management and flexible authentication. Our implementation needed to address two primary requirements: ...

When upgrading web applications from .NET 2.0 to .NET 4.0, developers often encounter unexpected validation errors that can be puzzling and frustrating. These errors typically manifest as HttpRequestValidationException messages, indicating that the application has detected potentially dangerous request data. This change in behavior represents a significant shift in how ASP.NET handles request validation, with important implications for application security and functionality. The Validation Challenge The error message you’re likely seeing looks something like this: ...