如何使用 C# 对接受文件字节数组的 Web 服务执行 httpPost
我正在开发一个 API 类型的项目，
我编写了一个 WebMethod（不完全是。我正在使用 MVC 创建类似 API 的 REST），
public UploadFileImage(string employeeId, byte[] imageBytes, string imageName)
{
// saves the imagebyte as an image to a folder
}
Web 服务将由 Web 应用程序、Windows 或甚至 iPhone 或类似的便携式设备。我正在使用 Web 应用程序通过简单的 httpPost 测试我的 Web 服务。
string Post(Uri RequestUri, string Data)
{
try
{
HttpWebRequest request = HttpWebRequest.Create(RequestUri) as HttpWebRequest;
request.Method = "POST";
request.ContentType = IsXml.Checked ? "text/xml" : "application/x-www-form-urlencoded";
byte[] bytes = Encoding.ASCII.GetBytes(Data);
Stream os = null; // send the Post
request.ContentLength = bytes.Length; //Count bytes to send
os = request.GetRequestStream();
os.Write(bytes, 0, bytes.Length);
HttpWebResponse httpWebResponse = (HttpWebResponse)request.GetResponse();
StreamReader streamReader = new StreamReader(request.GetResponse().GetResponseStream());
return streamReader.ReadToEnd();
}
catch (Exception ex)
{
return ex.Message;
}
}
这段代码适用于每个方法，如 AddEmployee、DeleteEmployee 等。参数数据的形式为“Id=123&name=abcdefgh&desig=Developer”，
我如何调用任何其他函数是 Post(new Uri("http://localhost/addemployee"),"name=abcd&password=efgh")
其中 post 是我写的函数。
一切都对所有功能都有好处。除了我不知道如何使用上述函数UploadFileImage来上传图像？
谢谢
I am working on an API kind of project,
I have wrote a WebMethod (not exactly. I am using MVC to create REST like API)
public UploadFileImage(string employeeId, byte[] imageBytes, string imageName)
{
// saves the imagebyte as an image to a folder
}
the web service would be consumed by a web app, or windows or even iphone or such portable stuffs. I am testing my web service using a web app, by simple httpPost.
string Post(Uri RequestUri, string Data)
{
try
{
HttpWebRequest request = HttpWebRequest.Create(RequestUri) as HttpWebRequest;
request.Method = "POST";
request.ContentType = IsXml.Checked ? "text/xml" : "application/x-www-form-urlencoded";
byte[] bytes = Encoding.ASCII.GetBytes(Data);
Stream os = null; // send the Post
request.ContentLength = bytes.Length; //Count bytes to send
os = request.GetRequestStream();
os.Write(bytes, 0, bytes.Length);
HttpWebResponse httpWebResponse = (HttpWebResponse)request.GetResponse();
StreamReader streamReader = new StreamReader(request.GetResponse().GetResponseStream());
return streamReader.ReadToEnd();
}
catch (Exception ex)
{
return ex.Message;
}
}
This code works fine for evey method like, AddEmployee, DeleteEmployee etc. THe parameter Data is of form "Id=123&name=abcdefgh&desig=Developer",
How I call any other function is
Post(new Uri("http://localhost/addemployee"),"name=abcd&password=efgh")
where post is the function i wrote.
All good for all functions. Except that I dont know how to consume the above mentioned function UploadFileImage to upload an image?
Thanks
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评论（2）
尝试将 imageBytes 编码为 Base64。
Try encoding the imageBytes as Base64.
从您的代码片段来看，您不太清楚如何调用UploadFileImage，即如何将其参数三元组转换为Data。
这就是为什么我的答案非常笼统：
一般来说，您最好通过以下方式传输图像文件
请允许我向您推荐 StackOverflow 上有关如何格式化多部分请求的示例。我相信如果你用谷歌搜索，你也会找到很多详细的例子和解释。
我希望这有帮助:-)
From your code snippet is not too clear how you call UploadFileImage, that is how you convert its parameters tripplet into Data.
That is why my answer is quite generic:
In general, you'd better transfer your image file by
Please allow me to refer you to a sample at StackOverflow on how to format a multipart request. I am sure that if you google, you shall find a lots of detailed examples and explanations as well.
I hope this helps :-)