Asp net files in directory

Note : For beginners in ASP. Folder Directory Location. The Folder Directory is located within the Project inside the wwwroot folder.

Below is the screenshot of the Solution Explorer window where you can see the Folder Directory i. Files and it containing three files. Following is a Model class named FileModel with one property i. You will need to import the following namespaces. The Controller consists of two Action methods. Action method for handling File Display operation. Later, the values of the Array are copied to a Generic List collection consisting objects of FileModel class and then returned to the View.

Action method for handling File Download operation. This action method handles the File Download operation and when the ActionLink is clicked, the name of the File to be downloaded is sent to this method. And then the Byte Array object is sent for download using the File function.

GetFiles Path. Combine this. ReadAllBytes path ;. If the user requests a file with an unknown file type, the Static File Middleware passes the request to the next middleware in the pipeline.

If no middleware handles the request, a Not Found response is returned. If directory browsing is enabled, a link to the file is displayed in a directory listing. With the preceding code, a request for a file with an unknown content type is returned as an image. Enabling ServeUnknownFileTypes is a security risk.

It's disabled by default, and its use is discouraged. FileExtensionContentTypeProvider provides a safer alternative to serving files with non-standard extensions. Additional instances of UseStaticFiles and UseFileServer can be provided with other file providers to serve files from other locations. The following example calls UseStaticFiles twice to serve files from both wwwroot and static :.

Disabling directory browsing in production is highly recommended. The entire directory and its sub-directories become publicly accessible. For example, Windows is case insensitive, but macOS and Linux aren't. NET Core Module to forward all requests to the app, including static file requests. The IIS static file handler isn't used and has no chance to handle requests.

NET Core Module is configured incorrectly, static files are served. This happens, for example, if the web. View or download sample code how to download. The CreateDefaultBuilder method sets the content root to the current directory:. The default web app templates call the UseStaticFiles method in Startup. Configure , which enables static files to be served:. Directory browsing isn't enabled. The following code shows Startup. Configure with UseFileServer :.

For more information, see this GitHub issue. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Static files in ASP. Is this page helpful? Please rate your experience Yes No. Any additional feedback? Serve static files Static files are stored within the project's web root directory.

CreateBuilder args ; builder. AddRazorPages ; builder. Build ; if! UseHttpsRedirection ; app. UseStaticFiles ; app. UseAuthorization ; app. MapDefaultControllerRoute ; app. MapRazorPages ; app. Run ; Static files are accessible via a path relative to the web root. Run ; The parameterless UseStaticFiles method overload marks the files in web root as servable.

Serve files outside of web root Consider a directory hierarchy in which the static files to be served reside outside of the web root : wwwroot css images js MyStaticFiles images red-rose. Combine builder. You then create a variable dataFile that contains the location and name of the file to store the data in.

Setting the location requires some special handling. If a website is moved, an absolute path will be wrong. Moreover, for a hosted site as opposed to on your own computer you typically don't even know what the correct path is when you're writing the code. But sometimes like now, for writing a file you do need a complete path. The solution is to use the MapPath method of the Server object. This returns the complete path to your website.

You can then concatenate additional information onto whatever the method returns in order to create a complete path. In this example, you add a file name. You can read more about how to work with file and folder paths in Introduction to ASP. This folder is a special folder in ASP.

The WriteAllText method of the File object writes the data to the file. This method takes two parameters: the name with path of the file to write to, and the actual data to write.

Notice that the name of the first parameter has an character as a prefix. This tells ASP. For more information, see Introduction to ASP. On your development computer this is not typically an issue.

However, when you publish your site to a hosting provider's web server, you might need to explicitly set those permissions. If you run this code on a hosting provider's server and get errors, check with the hosting provider to find out how to set those permissions. In the previous example, you used WriteAllText to create a text file that's got just one piece of data in it.

If you call the method again and pass it the same file name, the existing file is completely overwritten. However, after you've created a file you often want to add new data to the end of the file. You can do that using the AppendAllText method of the File object. In the website, make a copy of the UserData.

This code has one change in it from the previous example. The methods are similar, except that AppendAllText adds the data to the end of the file. Even if you don't need to write data to a text file, you'll probably sometimes need to read data from one.

To do this, you can again use the File object. You can use the File object to read each line individually separated by line breaks or to read individual item no matter how they're separated.

This procedure shows you how to read and display the data that you created in the previous example. The code starts by reading the file that you created in the previous example into a variable named userData , using this method call:. The code to do this is inside an if statement. When you want to read a file, it's a good idea to use the File.

Exists method to determine first whether the file is available. The code also checks whether the file is empty.

The body of the page contains two foreach loops, one nested inside the other. The outer foreach loop gets one line at a time from the data file. In this case, the lines are defined by line breaks in the file — that is, each data item is on its own line. The inner loop splits each data line into items fields using a comma as a delimiter. Based on the previous example, this means that each line contains three fields — the first name, last name, and email address, each separated by a comma.

The code illustrates how to use two data types, an array and the char data type. The array is required because the File. ReadAllLines method returns data as an array. The char data type is required because the Split method returns an array in which each element is of the type char. For information about arrays, see Introduction to ASP.

You can use Microsoft Excel to save the data contained in a spreadsheet as a comma-delimited file. When you do, the file is saved in plain text, not in Excel format.