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C# HttpClient 4.5 multipart/form-data upload

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逝去的感伤
逝去的感伤 2020-11-22 05:39

Does anyone know how to use the HttpClient in .Net 4.5 with multipart/form-data upload?

I couldn\'t find any examples on the internet.

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  • 孤独总比滥情好
    孤独总比滥情好 (楼主)
    2020-11-22 05:57 

    public async Task PassImageWithText(IFormFile files)
{
    byte[] data;
    string result = "";
    ByteArrayContent bytes;

    MultipartFormDataContent multiForm = new MultipartFormDataContent();

    try
    {
        using (var client = new HttpClient())
        {
            using (var br = new BinaryReader(files.OpenReadStream()))
            {
                data = br.ReadBytes((int)files.OpenReadStream().Length);
            }

            bytes = new ByteArrayContent(data);
            multiForm.Add(bytes, "files", files.FileName);
            multiForm.Add(new StringContent("value1"), "key1");
            multiForm.Add(new StringContent("value2"), "key2");

            var res = await client.PostAsync(_MEDIA_ADD_IMG_URL, multiForm);
        }
    }
    catch (Exception e)
    {
        throw new Exception(e.ToString());
    }

    return result;
}

    
    
             
    
                                                        
    
            
            
    
              
                
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