5 sample code snippet in C# to upload file to web service

Certainly! Here are five sample code snippets in C# for uploading a file to a web service:

Using HttpClient:

using System;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;

public async Task UploadFileUsingHttpClient(string filePath, string uploadUrl)
{
    using (HttpClient client = new HttpClient())
    {
        using (FileStream fileStream = File.OpenRead(filePath))
        {
            using (MultipartFormDataContent content = new MultipartFormDataContent())
            {
                content.Add(new StreamContent(fileStream), "file", Path.GetFileName(filePath));
                HttpResponseMessage response = await client.PostAsync(uploadUrl, content);
                response.EnsureSuccessStatusCode();
            }
        }
    }
}

Using WebClient:

using System;
using System.Net;
using System.Threading.Tasks;

public void UploadFileUsingWebClient(string filePath, string uploadUrl)
{
    using (WebClient client = new WebClient())
    {
        client.UploadFile(uploadUrl, filePath);
    }
}

Using HttpWebRequest:

using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;

public async Task UploadFileUsingHttpWebRequest(string filePath, string uploadUrl)
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uploadUrl);
    request.Method = "POST";
    using (FileStream fileStream = File.OpenRead(filePath))
    {
        using (Stream requestStream = await request.GetRequestStreamAsync())
        {
            await fileStream.CopyToAsync(requestStream);
            requestStream.Close();
        }
    }
    using (HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
    {
        if (response.StatusCode == HttpStatusCode.OK)
        {
            // File uploaded successfully
        }
    }
}

Using RestSharp:

using System;
using RestSharp;

public void UploadFileUsingRestSharp(string filePath, string uploadUrl)
{
    RestClient client = new RestClient(uploadUrl);
    RestRequest request = new RestRequest(Method.POST);
    request.AddFile("file", filePath);
    IRestResponse response = client.Execute(request);
    if (response.StatusCode == System.Net.HttpStatusCode.OK)
    {
        // File uploaded successfully
    }
}

Using WebRequest and Stream:

using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;

public async Task UploadFileUsingWebRequest(string filePath, string uploadUrl)
{
    WebRequest request = WebRequest.Create(uploadUrl);
    request.Method = "POST";
    using (FileStream fileStream = File.OpenRead(filePath))
    {
        using (Stream requestStream = await request.GetRequestStreamAsync())
        {
            await fileStream.CopyToAsync(requestStream);
            requestStream.Close();
        }
    }
    using (WebResponse response = await request.GetResponseAsync())
    {
        // Handle the response if needed
    }
}

Choose the code snippet that suits your needs and integrate it into your application. Remember to replace filePath with the path of the file you want to upload and uploadUrl with the URL of the web service endpoint to receive the file.