WebHow To Post File and Data to API using HttpClient C# Send a image file and form data with HttpClient and Onclick submit button we are calling this action method. using below code you can Post file as well as some parameter to web api. WebDec 15, 2024 · When you’re adding a file to MultipartFormDataContent, you use the following Add () method overload: public void Add(HttpContent content, string name, string fileName) ; Code language: C# (cs) The name parameter is the form field name. Set this to the parameter name defined by the web API (if it’s using automatic mapping).
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