Completed event for FilePathResult in C#

Completed event for FilePathResult in C#

The FilePathResult class in ASP.NET MVC provides a way to return a file from the server to the client. It does not have a Completed event, but you can use the OnResultExecuting method to perform an action after the file download is completed.

Here's an example of how to do this:

public class MyController : Controller { public FilePathResult Download() { string filePath = @"C:\MyFile.txt"; string contentType = "text/plain"; string fileName = "MyFile.txt"; return File(filePath, contentType, fileName); } protected override void OnResultExecuting(ResultExecutingContext filterContext) { if (filterContext.Result is FilePathResult) { // Perform any actions after the file download is completed Console.WriteLine("File download completed"); } base.OnResultExecuting(filterContext); } }

In this example, the Download method returns a FilePathResult object that downloads a file from the server. The OnResultExecuting method is overridden to check if the result is a FilePathResult. If it is, it performs an action after the file download is completed, which in this case is writing a message to the console.

Note that the OnResultExecuting method is called for every action result that returns from a controller. If you only want to handle the FilePathResult object, you can add a check for the result type, as shown in the example.

Examples

  1. "Handling completion events for FilePathResult in ASP.NET MVC"

    • Code:
      // Subscribe to FileResult's OnCompleted event var filePathResult = new FilePathResult("path/to/file.txt", "text/plain"); filePathResult.OnCompleted += (sender, args) => { /* Your completion logic here */ };
    • Description: Learn how to subscribe to the OnCompleted event of FilePathResult in ASP.NET MVC for executing code after the file download is complete.

  2. "Customizing response headers on FilePathResult completion in C#"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { HttpContext.Response.Headers.Add("Custom-Header", "Value"); };
    • Description: Explore how to customize response headers when the FilePathResult download is completed using the OnCompleted event.

  3. "Asynchronous handling of FilePathResult completion in C#"

    • Code:
      filePathResult.OnCompleted += async (sender, args) => { await SomeAsyncOperation(); // Your asynchronous completion logic here };
    • Description: Understand how to handle asynchronous operations in the OnCompleted event of FilePathResult for scenarios such as database updates or logging.

  4. "Logging file download completion events in C#"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { Logger.Log("File download completed: " + filePathResult.FileName); };
    • Description: Implement logging functionality to capture and log completion events for file downloads using FilePathResult.

  5. "Detecting file download failures with FilePathResult completion events"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { if (args.Error != null) { // Handle download failure } };
    • Description: Learn how to detect and handle file download failures by checking the Error property in the OnCompleted event.

  6. "Executing cleanup code after FilePathResult download in C#"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { // Your cleanup logic here };
    • Description: Implement cleanup code to run after the completion of a file download using the OnCompleted event.

  7. "Redirecting users after successful file download in C#"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { HttpContext.Response.Redirect("/success"); };
    • Description: Redirect users to a different page after a successful file download by using the OnCompleted event.

  8. "Handling large file downloads with FilePathResult completion events"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { // Your logic for handling large file downloads };
    • Description: Learn strategies for handling large file downloads efficiently using the OnCompleted event of FilePathResult.

  9. "Security considerations for FilePathResult completion events in C#"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { // Perform security checks before executing completion logic };
    • Description: Explore security best practices and considerations when implementing completion events for FilePathResult in ASP.NET.

  10. "Using FilePathResult completion events for client-side notifications in C#"

    • Code:
      filePathResult.OnCompleted += (sender, args) => { // Send a client-side notification after download completion var script = "alert('Download completed successfully.');"; HttpContext.Response.WriteAsync("<script>" + script + "</script>"); };
    • Description: Implement client-side notifications using the OnCompleted event of FilePathResult to inform users about the completion of file downloads.

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