Adds the given trailer name to the 'Trailer' response header. This must happen before the response headers are sent. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services.
Privacy policy. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Http Assembly: Microsoft. Abstractions v1. Create initializes a new instance of the WebApplication class with preconfigured defaults.
In the port setting samples that follow, running the app from Visual Studio returns an error dialog Unable to connect to web server 'AppName'. Run the following port changing samples from the command line. If the Kestrel endpoint is also configured in the appsettings. For more information, see Kestrel endpoint configuration. For more information on the development certificate, see Trust the ASP. The following sections show how to specify the custom certificate using the appsetting.
For more information using the environment, see Use multiple environments in ASP. NET Core. For more information, see Configuration in ASP. For more information, see Logging in. This section contains sample code using WebApplicationBuilder. CreateBuilder initializes a new instance of the WebApplicationBuilder class with preconfigured defaults. For more information, see ASP. NET Core fundamentals. The following table shows the environment variable and command-line argument used to change the content root, app name, and environment:.
It'll not get automatically downloaded. You may create an anchor tag in your front-end app programmatically and set the href property to an object URL created from the Blob by the method below. Now clicking on the anchor will download the file.
You can set a file name by setting the 'download' attribute to the anchor as well. Below is the code for returning File from controller to view.
Following is Action method which will return file:. Our file should be first converted into byte[] and then saved in database as varbinary max in order to retrieve. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.
Learn more. Return file in ASP. Asked 4 years, 9 months ago. Active 24 days ago. Viewed k times. Any Thoughts? The only way to solve this problem is by finding out the real error, which often is unrelated to business logic, much probably being a programming error like NullReferenceException or conversion between incompatible types, etc.
Log files and debugging are some valid ways to troubleshot this kind of issue. I am downloading excel file. It downloads but when I try to open the file it says the file is corrupted. But when I download it is 10kb. What kind of problem is this? This is an old answer, but my comment still applies.
This code leaks a MemoryStream. The MemoryStream should be nested in a using block so that managed resources can be disposed. If he using is added, the method can't return the File because the MemoryStream goes out of scope and is disposed before the file is returned. The ASP. NET Core infrastructure takes care of disposing the stream when sending the response, so there's no leak see the FileResultExecutorBase. WriteFileAsync method.
If you try to surround this code with a using statement, no file will be sent. You can try below code to download the file. JacobIRR 7, 6 6 gold badges 31 31 silver badges 54 54 bronze badges.
XamDev XamDev 2, 8 8 gold badges 47 47 silver badges 82 82 bronze badges. Now with TLS 1. Thanks to the ASP. One common use case for this is to add caching headers.
Allowing clients and CDNs to cache your content can have a massive effect on your application's performance. By allowing caching, your application never sees these additional requests and never has to allocate resources to process them, so it is more available for requests that cannot be cached.
In most cases you will find that a significant proportion of the requests to your site can be cached. A typical site serves both dynamically generated content e. The static files are typically fixed at the time of publish, and so are perfect candidates for caching.
In this post I'll show how you can add headers to the files served by the StaticFileMiddleware to increase your site's performance. I'll also show how you can add a version tag to your file links, to ensure you don't inadvertently serve stale data. Note that this is not the only way to add cache headers to your site. You could also consider adding caching at the reverse proxy level e. When you create a new ASP. Configure :. This enables serving files from the wwwroot folder in your application.
The default template contains a number of static files site. It is these we wish to cache. Before we get to adding caching, lets investigate the default behaviour.
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