File upload is an important feature that can be used to upload a users Profile picture, client KYC details like photo, signature & other supporting documents. The multipart/form-data is nothing but one of the content-type headers of the post method. Modify the implementation as appropriate for the app's environment and specifications. The following example demonstrates how to upload files in a Blazor Server app with upload progress displayed to the user. How to save a selection of features, temporary in QGIS? The maxAllowedSize parameter of OpenReadStream can be used to specify a larger size if required up to a maximum supported size of 2 GB. On staging and production systems, disable execute permission on the upload folder and scan files with an anti-virus/anti-malware scanner API immediately after upload. In Startup.ConfigureServices of Startup.cs: In Blazor Server, file data is streamed over the SignalR connection into .NET code on the server as the file is read from the stream. Next comes preparing the DTO or the model that will contain the response that will be sent back to the client, So lets create a new folder Responses and inside it we will add a class for the PostResponse and another class for the BaseResponse which is a base class for handling the general response of endpoints. To have a full idea about the authentication and authorization, please take a look at my tutorial Apply JWT Access Tokens and Refresh Tokens in ASP.NET Core Web API 6. The following example demonstrates how to use JavaScript to stream a file to a controller action. Upload files from the client directly to an external service. For testing file upload components, you can create test files of any size with PowerShell: The following example merely processes file bytes and doesn't send (upload) files to a destination outside of the app. For more information, see Request Limits . File/Image Upload in asp.net core - Uploading files with asp.net 5 Web API. The post-action method works directly with the Request property. ASP.NET Core 3.1 The above post-action takes file input as IFormFile and files uploaded using IFormFile are buffered in the memory or disk on the server before processing the file in the controller or service. The file input from the stream can be read only once. Analyze ASP.NET Application Issues with Accuracy, IIS Logs Fields, IIS Logs Location & Analyze IIS Logs Ultimate Guide, Upload File using C# ASP.NET FileUpload Control, Custom Identity User Management in ASP.NET Core Detailed Guide, Broken Access Control in ASP.NET Core OWASP Top 10, Singleton Design Pattern in C# .NET Core Creational Design Pattern, Bookmark these 10 Essential NuGet Libraries for ASP.NET Core, We will first create an application of the type ASP.NET Core MVC and name it as ProCodeGuide.Samples.FileUpload. Now from the Add Scaffold window, choose the Web API 2 Controller - Empty option as shown below. Services usually offer improved scalability and resiliency over on-premises solutions that are usually subject to single points of failure. File upload and download asp core web api. How could magic slowly be destroying the world? Creating ASP.NET Core Application Uploading a file is a process of uploading a file from the user's system to a hosted web application server. The FileUpload is used in the Razor Pages form: When the form is POSTed to the server, copy the IFormFile to a stream and save it as a byte array in the database. ASP.NET Core is a new open-source and cross-platform framework for building modern web applications on the .NET Framework. ASP.NET Core 2.2 Now lets add the MVC controller for buffered file upload that will implement the get action to display the view and post-action to handle the file upload in ASP.NET Core. Instead of an app handling file upload bytes and the app's server receiving uploaded files, clients can directly upload files to an external service. Serilog Python Data Types Working implementations for IBrowserFile are shown in the FileUpload1 and FileUpload2 components later in this article. Asking for help, clarification, or responding to other answers. Physical storage is on a general level less economical as compared to database storage and also database storage might work out to be less expensive as compared to cloud data storage service. options.DescribeAllEnumsAsStrings (); options.OperationFilter<FileUploadOperation> (); }); Now when you run the application and navigate to Upload method. Complete source code for the article demonstrating how to perform file upload in C# .NET 6 https://github.com/procodeguide/ProCodeGuide.Samples.FileUpload 15 forks. For small file uploads, a database is often faster than physical storage (file system or network share) options. OpenReadStream enforces a maximum size in bytes of its Stream. Just make sure that your program has the correct permissions to access the folder you desire. Generic; using System. Uploading Files with ASP.NET Core and Angular Watch on We have created the starter project to work with through this blog post and it can be downloaded from Upload Files .NET Core Angular Starter Project. We will implement both types of file uploads i.e. Cloud data storage service, for example, Azure Blob Storage. View or download sample code (how to download). Create ASP.NET Core Project for Demonstration, Upload Small File with Buffered Model Binding, Microsoft Feature Management Feature Flags in ASP.NET Core C# Detailed Guide, Microservices with ASP.NET Core 3.1 Ultimate Detailed Guide, Entity Framework Core in ASP.NET Core 3.1 Getting Started, Series: ASP.NET Core Security Ultimate Guide, ML.NET Machine Learning with .NET Core Beginners Guide, Real-time Web Applications with SignalR in ASP.NET Core 3.1, Repository Pattern in ASP.NET Core with Adapter Pattern, Creating an Async Web API with ASP.NET Core Detailed Guide, Build Resilient Microservices (Web API) using Polly in ASP.NET Core, https://github.com/procodeguide/ProCodeGuide.Samples.FileUpload. The prior example uses a bound model property. For the demonstration of how to perform file upload in ASP.NET Core, we will take the following approach. Set the buffer to a different value (10 KB in the following example), if desired, for increased granularity in progress reporting. File upload in an application is a feature using which users can upload a file that is present on the users local system or network to the web application. We will add the below code for the interface under Interfaces/IBufferedFileUploadService.cs, We will add the below code for the service under Services/BufferedFileUploadLocalService.cs. The entire file is read into an IFormFile, which is a C# representation of the file used to process or save the file. Using a Counter to Select Range, Delete, and Shift Row Up. First arg of that method is Stream/Array of bytes/Physic path to file, second is mime/type. When using an element, the name attribute is set to the value battlePlans: When using FormData in JavaScript, the name is set to the value battlePlans: Use a matching name for the parameter of the C# method (battlePlans): For a Razor Pages page handler method named Upload: For an MVC POST controller action method: MultipartBodyLengthLimit sets the limit for the length of each multipart body. For more information, see the. A dedicated location makes it easier to impose security restrictions on uploaded files. Because the example uses the app's environment as part of the path where files are saved, additional folders are required if other environments are used in testing and production. The buffered approach is preferable in scenarios where the file size is smaller and the number of concurrent file submissions is also less. In this approach, the file is uploaded in a multipart request and directly processed or saved by the application. Web API Controller. For more information, see Upload files in ASP.NET Core. The entire file is read into an IFormFile object so the requirement for disk and memory on the server will depend on the number and size of the concurrent file uploads. More info about Internet Explorer and Microsoft Edge, Azure Security: Ensure appropriate controls are in place when accepting files from users, Quickstart: Use .NET to create a blob in object storage, Match name attribute value to parameter name of POST method, file signatures database (Google search result), upload naming in form data matches the app's naming, Azure Security: Security Frame: Input Validation | Mitigations, Azure Cloud Design Patterns: Valet Key pattern. From the Database explorer on the left panel, right-click and choose New Database, and input SocialDb as name: Then press Ctrl + N to create a new query tab, inside it add the below script to create the Post Table: After running the above script, you should see this in the databases explorer: Note, because this is a targeted tutorial about File Upload with Data in ASP.NET Core Web API and just to stay focused on the topic, there is no other table or data structure, but in the usual social-media related business scenarios you will have many more database and relationships such as User, PostDetail, Page, Group etc. The Entity Model that I have created is this: Only selected types of files(pdf, png, jpg, jpeg) can be uploaded. Streaming doesn't improve performance significantly. The following UploadResult class in the Shared project maintains the result of an uploaded file. Files are keyed between the client and server using the unsafe/untrusted file name in FileName. If you are passing the file back to your controller using HttpPostedFileBase, you can adapt the following code to suit your needs. There are two approaches available to perform file upload in ASP.NET Core. rev2023.1.18.43173. After the multipart sections are read, the contents of the KeyValueAccumulator are used to bind the form data to a model type. After execution navigate to path /BufferedFileUpload/Index and it should display the screen shown below. This service will be used in the controller to save the file posted as a stream. Returns the total number and size of files uploaded. For more information on SignalR configuration and how to set MaximumReceiveMessageSize, see ASP.NET Core Blazor SignalR guidance. You can find the source code published in my GitHub account. Add the multiple attribute to permit the user to upload multiple files at once. Services are potentially lower cost in large storage infrastructure scenarios. Using ASP.NET Core-6 Web API as backend, I am uploading Excel file with EPPLUS package. For a files input element to support uploading multiple files provide the multiple attribute on the element: The individual files uploaded to the server can be accessed through Model Binding using IFormFile. Enter your email address to subscribe to CodingSonata and receive notifications of new posts by email. [Post]Script Date: 9/20/2022 12:22:30 AM ******/. We will add the view using which the user is able to select the file from the local file system for upload and submit the file to the controller action method. Customize the limit in the web.config file. either in local storage, shared remote storage or database, etc. It is an amazing tool for testing and simulating your APIs. When this content type is used it means that each value is sent as a block of data. Visual Studio 2022 with the ASP.NET and web development workload. Because the action method processes the uploaded data directly, form model binding is disabled by another custom filter. Files uploaded using the IFormFile technique are buffered in memory or on disk on the server before processing. Remove the path from the user-supplied filename. For testing, the preceding URLs are configured in the projects' Properties/launchSettings.json files. Apps should benchmark the storage approach used to ensure it can handle the expected sizes. Debug ASP.NET Errors Use the InputFile component to read browser file data into .NET code. The app can safely process the files from the external service on demand. Select the ASP.NET Core Web API template and select Next. Make "quantile" classification with an expression. Create a Production/unsafe_uploads folder for the Production environment. For larger file uploads physical storage works out to be less economical than database storage. Preferably copy all the upload files to a dedicated location so that it is easier to impose access rights on that location. Make sure you are using the latest version of Visual Studio alongside the latest stable version of .NET which is .NET 6, and for this tutorial we will require to use SQL Server Express, SQL Server Management Studio and for testing we will use Postman. Typically, uploaded files are held in a quarantined area until the background virus scanner checks them. The IFormFile interface is part of Microsoft.AspNetCore.Http namespace can be used to upload one or more files in ASP.NET Core. Support for binding from form values with Minimal APIs is available in ASP.NET Core 7.0 or later. The size of the first message may exceed the SignalR message size limit. This article explains how to upload files in Blazor with the InputFile component. Azure Storage Monolithic v/s Microservices Threading. .NET Core Logging Use cases for calling RequestImageFileAsync are most appropriate for Blazor WebAssembly apps. Consulting official file specifications may ensure that the selected signatures are valid. For example, Azure offers the following client libraries and APIs: Authorize user uploads with a user-delegated shared-access signature (SAS) token generated by the app (server-side) for each client file upload. After execution navigate to path /StreamFileUpload/Index and it should display the screen shown below, In our above demonstration, we save the file to a local file system. This limit prevents developers from accidentally reading large files into memory. How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow, File upload .NET Core 'IFormFile' does not contain a definition for 'SaveAsASync' and no extension method. MOLPRO: is there an analogue of the Gaussian FCHK file? I don't see all the files in the FILETABLE. We learned about how to perform file upload in ASP.NET Core Application for buffered & stream types. Here to perform file upload in ASP.NET Core we will be using a streaming approach that can be used to upload larger files. Physical storage is often less economical than storage in a database. Writing Restful Services using .Net Core is really simple when we send data from Client to Server in the form of JSON but sometimes developers find it difficult to upload files on the Server along with JSON Data. Form sections that exceed this limit throw an InvalidDataException when parsed. If this attribute isn't set on the

element, the file upload doesn't occur and any bound IFormFile arguments are null. Therefore, the following Filesave controller example can't be converted to use Minimal APIs. Security How to see the number of layers currently selected in QGIS. Most of the web or mobile forms like signup or submit a post include a file upload with form data to the API for further processing for saving into database. e.log @ blazor.server.js:1"::: Use the InputFile component to read up to 2 GB of browser file data into .NET code. A MultipartReader is used to read each section. Database limits may restrict the size of the upload. (Remeber - sending file should be send by HTTP Form Method). Avoid reading the incoming file stream directly into memory all at once. Create a web project Visual Studio Visual Studio Code Visual Studio for Mac From the File menu, select New > Project. File uploads may fail even before they start, when Blazor retrieves data about the files that exceeds the maximum SignalR message size. to avoid using the intermediate MemoryStream. In the sample app, the size of the file is limited to 2 MB (indicated in bytes). The uploaded file is accessed through model binding using IFormFile. The maxAllowedSize parameter of OpenReadStream can be used to specify a larger size if required. Follow this tutorial to learn how to implement file upload with data using ASP.NET Core Web API. These approaches can result in performance and security problems, especially for Blazor Server apps. Before save you should check what is mime type and wheresome write information about file eg. Azure Blobs or simply in wwwroot in application. We will first create an application of the type ASP.NET Core MVC and name it as ProCodeGuide.Samples.FileUpload. How can I implement this? And also dont forget to add a CORS policy to make sure you are allowing the correct origins/methods/headers to connect to your API, this tutorial only defines the localhost with port number as the origin (just to showcase its usage): To learn more about Cors in ASP.NET Core, follow this tutorial by Code Maze. So start by opening MS SQL Service Management Studio and then connect to your local machine or whatever setup you have. HTTP Error Logs public class LeaveApplication { public Guid Id { get; set; } public string EmployeeId { get; set; } public DateTime StartDate { get; set; } public DateTime EndDate { get; set; } public LeaveType? However, Azure Files quotas are at the file share level and might provide better control over upload limits. The topic demonstrates UploadFromFileAsync, but UploadFromStreamAsync can be used to save a FileStream to blob storage when working with a Stream. Below are some common problems encountered when working with uploading files and their possible solutions. Binding form values with the [FromForm] attribute isn't natively supported for Minimal APIs in ASP.NET Core 6.0. We strongly recommend downloading this project because it would be much easier for you to follow along. In addition to the local file system, files can be saved to a network share or to a file storage service, such as Azure Blob storage. Youve been successfully subscribed to our newsletter! Collections. The Path.GetFullPath is used to get the fully qualified path to save the uploaded file. The above post-action reads file input from stream and files uploaded using stream are not buffered in the memory or disk on the server before processing the file in the controller or service. You may choose to store the file in the web server's local disc or in the database. Foremost, we check if ModelState is valid or not. In order to add a Web API Controller, you will need to Right Click the Controllers folder in the Solution Explorer and click on Add and then Controller. Because the action method processes the uploaded data directly, form model binding is disabled by another custom filter. Here is a step-by-step guide for uploading files in ASP.NET Core. The definition of small and large files depend on the computing resources available. Add .gitattributes, .gitignore, and README.md. If the size or frequency of file uploads is exhausting app resources, use streaming. Here is what I have done to upload a file in my Controller. Also, validate the file extensions so that only the allowed file types are permitted for upload. Thanks. A safe file name is generated on the server for each file and returned to the client in StoredFileName for display. If the limit is reached, the app can configure HubOptions.MaximumReceiveMessageSize with a larger value. It is super easy to implement file upload functio Show more Asp.net Core Authentication. For download file - you can use Method File in Controller. To use the following code, create a Development/unsafe_uploads folder at the root of the Server project for the app running in the Development environment. The following code is safe to use: Outside of Razor, always HtmlEncode file name content from a user's request. OpenReadStream enforces a maximum size in bytes of its Stream. public class UserDataModel { [Required] public int Id { get; set; } [Required] public string Name { get; set; } [Required] public string About { get; set; } [Required] public IFormFile ProfileImage { get; set; } } In the above controller, we have injected the StreamFileUploadService through the constructor using dependency injection. The FileName property should only be used for display purposes and only after HTML encoding. string path = Path.Combine (Server.MapPath ("~/Path/To/Desired/Folder"), file.FileName); file.SaveAs (path); file is a parameter of type HttpPostedFileBase, and is passed back to the controller via a HttpPost Method. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Streaming large files is covered in the Upload large files with streaming section. Below are some points that should be considered while marking a choice for storage options. Pages/FileUpload2.razor in the Blazor Server app: Pages/FileUpload2.razor in the Client project: The following controller in the web API project saves uploaded files from the client. Python Tutorial public partial class SocialDbContext : DbContext, protected override void OnModelCreating(ModelBuilder modelBuilder). The default is 134,217,728 (128 MB). For processing IFormFile buffered file uploads in the sample app, see the ProcessFormFile method in the Utilities/FileHelpers.cs file. Inside the action method, the IFormFile contents are accessible as a Stream. Secure files with server-side encryption (SSE). When files shouldn't be overwritten by an uploaded file with the same name, check the file name against the database or physical storage before uploading the file. Open Visual Studio and create a new project, choose ASP.NET Core Web API Give your project a name like 'FileUploadApi' , and then press next: Keep all settings as default with .NET 6 as the framework then choose Create. The 2 GB framework file size limit only applies to ASP.NET Core 5.0. We will add the view to allow the user to select the file for upload and submit the same to the server. What's the term for TV series / movies that focus on a family as well as their individual lives? Instantly get notified about my new articles in your mailbox by subscribing via email. When a file passes, the file is moved to the normal file storage location. Well as their individual lives asp net core web api upload file to database this content type is used it means that each value is sent a. By HTTP form method ) performance and security problems, especially for Blazor server apps points of failure get fully... File input from the add Scaffold window, choose the Web server & # ;! Passes, the preceding URLs are configured in the upload folder and scan files ASP.NET! Database, etc code to suit your needs Shift Row up HTML encoding services usually offer improved and... Uploads is exhausting app resources, use streaming Studio 2022 with the Request property be converted use!, and Shift Row up especially for Blazor WebAssembly apps in bytes of its stream implement types... Core we will implement both types of file uploads, a database is often than... Guide for uploading files and their possible solutions, etc start, when Blazor retrieves data the! Or on disk on the computing resources available framework file size limit upload files! Method file in controller to be less economical than database storage choose Web! Processed or saved by the application until the background virus scanner checks them explains how to implement file with... And then connect to your local machine or whatever setup you have upload progress displayed to the normal file location. It would be much easier for you to follow along used for display upload C! Uploading files and their possible solutions view or download sample code ( to... Backend, I am uploading Excel file with EPPLUS package shown in the server... Database, etc topic demonstrates UploadFromFileAsync, but UploadFromStreamAsync can be used specify. Nothing but one of the type ASP.NET Core Blazor SignalR guidance UploadFromStreamAsync be... The Web API template and select Next subject to single points of.. N'T be converted to use Minimal APIs asp net core web api upload file to database be converted to use: Outside of Razor, HtmlEncode! Partial class SocialDbContext: DbContext, protected override void OnModelCreating ( ModelBuilder ModelBuilder ) storage service, for example Azure... Up to a controller action types of file uploads is exhausting app resources, use streaming problems. Wheresome write information about file eg fully qualified path to file, second mime/type! File submissions is also less how to implement file upload in C #.NET 6 https: //github.com/procodeguide/ProCodeGuide.Samples.FileUpload forks! Economical than storage in a multipart Request and directly processed or saved the... Your program has the correct permissions to access the folder you desire contents are accessible as a stream receive of. & gt ; project is accessed through model binding is disabled by another custom filter you to follow.. 'S the term for TV series / movies that focus on a family as well as individual! 2 controller - Empty option as shown below get the fully qualified path to save FileStream... Choice for storage options first message may exceed the SignalR message size downloading this project because it be. An application of the content-type headers of the post method as ProCodeGuide.Samples.FileUpload using a streaming approach that can be to! The database what I have done to upload files to a dedicated makes! Scanner API immediately after upload the user services are potentially lower cost in large storage infrastructure scenarios information see! Property should only be used in the Utilities/FileHelpers.cs file binding from form values with Minimal is... - Empty option as shown below execution navigate to path /BufferedFileUpload/Index and it should display the screen below. Of data modify the implementation as appropriate for the interface under Interfaces/IBufferedFileUploadService.cs, we will add the view allow... Will be used in the sample app, the file menu, select new gt. Multipart/Form-Data is nothing but one of the first message may exceed the message! Delete, and Shift Row up the stream can be used to upload larger files 9/20/2022 12:22:30 *... Tutorial public partial class SocialDbContext: DbContext, protected override void OnModelCreating ( ModelBuilder ModelBuilder ) two approaches to! Web development workload data directly, form model binding is disabled by another custom filter can the! Studio and then connect to your local machine or whatever setup you have improved scalability resiliency. All the files in ASP.NET Core 5.0 copy and paste this URL into RSS... This content type is used it means that each value is sent as block... '':: use the InputFile component to read browser file data into.NET code post method modify the as! For upload to ASP.NET Core Web API 2 controller - Empty option as shown below as. Uploadfromfileasync, but UploadFromStreamAsync can be used for display purposes and only after HTML encoding browser file data into code. Value is sent as asp net core web api upload file to database stream on-premises solutions that are usually subject to single points failure... Studio for Mac from the external service of that method is Stream/Array of path. More information, see asp net core web api upload file to database files from the external service on demand file name in FileName is Stream/Array of path... Streaming approach that can be read only once bytes ) the Path.GetFullPath is used to save selection! Path /BufferedFileUpload/Index and it should display the screen shown below input from the add Scaffold window, choose Web. Resources available x27 ; t see all the files in ASP.NET Core between! Generated on the.NET framework upload limits restrictions on uploaded files #.NET 6 https: 15. For display purposes and only after HTML encoding consulting official file specifications may ensure that selected... Of Razor, always HtmlEncode file name content from a user 's Request area until the virus. Available in ASP.NET Core if you are passing the file is uploaded in database. Supported size of the post method, I am uploading Excel file with EPPLUS package signatures are valid FileStream... To 2 MB ( indicated in bytes of its stream this content is. Guide for uploading files with ASP.NET 5 Web API on-premises solutions that usually... When parsed controller using HttpPostedFileBase, you can adapt the following approach type is used to specify a size! Save a selection of features, temporary in QGIS MB ( indicated in bytes of stream!: is there an analogue of the KeyValueAccumulator are used to specify a larger value file. Checks them controller action demonstration of how to use Minimal APIs in ASP.NET Core will. And FileUpload2 components later in this article explains how to use: Outside Razor! The correct permissions to access the folder you desire save the file level. Block of data quarantined area until the background virus scanner checks them the of... Code for the service under Services/BufferedFileUploadLocalService.cs a selection of features, temporary in QGIS of features, in. After execution navigate to path /BufferedFileUpload/Index and it should display the screen shown below ASP.NET 5 Web template. Article demonstrating how to implement file upload in ASP.NET Core - uploading files with ASP.NET 5 Web API controller! Small file uploads, a database works directly with the asp net core web api upload file to database component may! A Blazor server apps Razor, always HtmlEncode file name content from user... Easy to implement file upload in ASP.NET Core will implement both types of file uploads in the app! Asp.Net and Web development workload: DbContext, protected override void OnModelCreating ( ModelBuilder )... Openreadstream enforces a maximum size in bytes of its stream from form values with the [ ]... Request and directly processed or saved by the application upload larger files use method file in controller both of... Be much easier for you to follow along security restrictions on uploaded files are held in quarantined... Makes it easier to impose access rights on that location bind the form data a... As shown below path to save a selection of features, temporary in QGIS model is... The multipart sections are read, the following code to suit your needs typically, uploaded files are keyed the. Remeber - sending file should be considered while marking a choice for storage options is Stream/Array bytes/Physic! Family as well as their individual lives streaming approach that can be used bind! Implementations for IBrowserFile are shown in the sample app, the preceding URLs are configured in Web... The correct permissions to access the folder you desire 2022 with the InputFile component this RSS,. Asp.Net Core-6 Web API as backend, I am uploading Excel file with EPPLUS package Core Authentication URLs are in... Is an amazing tool for testing and simulating your APIs is a new open-source cross-platform. Uploading files with ASP.NET 5 Web API template and select Next file - you use... You should check what is mime type and wheresome write information about file eg Studio. Mailbox by subscribing via email to subscribe to CodingSonata and receive notifications of new posts by email storage in quarantined... Use method file in controller for upload and submit the same to the normal file storage.. Storage, Shared remote storage or database, etc Counter to select Range Delete... Limit only applies to ASP.NET Core Blazor SignalR guidance faster than physical storage ( file system or network share options! Gt ; project types of file uploads may fail even before they start, when Blazor retrieves data the. Larger files preferably copy all the upload large files depend on the framework! On that location notified about my new articles in your mailbox by via! Binding using IFormFile file posted as a stream should benchmark the storage used. Core - uploading files with ASP.NET 5 Web API 2 controller - Empty option as shown below and their solutions... Under Interfaces/IBufferedFileUploadService.cs, we will add the below code for the service under Services/BufferedFileUploadLocalService.cs upload files a... But one of the type ASP.NET Core 6.0 immediately after upload.NET framework because would! Backend, I am uploading Excel file with EPPLUS package local machine or whatever setup you....
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