HTTP Post请求带参数及上传文件RestSharp辅助工具类的使用方法

最近在做项目时遇到需要用HTTP提交数据到Android设备注册，在网上看了很多文章，用纯代码提交form-data数据请求遇到各种错，最后才发现这个组件，对于不是很懂的我是觉得挺好用的。

RestSharp是Http辅助类组件。只用到RestClient和RestRequest两种类型，支持上传文件。以下是vb.net写的例子：

  Public Function PersonRegister() As Boolean
        Try

            Dim client As RestClient = New RestClient("http://192.168.1.100:8899/user")
            Dim request As RestRequest = New RestRequest(Method.POST)
            request.AddHeader("cache-control", "no-cache")
            request.AddHeader("content-type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW")‘可省略
            request.AddParameter("idNumber","123456789")
            request.AddParameter("name", "MY")
            request.AddParameter("address", "") '
            request.AddFile("imgPath", "C:\Users\Administrator\Desktop\IMG\01.png")'图片
            Dim response As IRestResponse = client.Execute(request)
            Dim str As String = response.Content
            Dim p As Object = JsonConvert.DeserializeObject(Of JObject)(str)
            If String.Compare(p.Item("data")("err").ToString, "0") = 0 Then
                     Return True
                    Exit Function
               Else 
                Return False
                Exit Function
            End If
        Catch ex As Exception
            Return False
            Exit Function
        End Try
        Return True
    End Function

引用文件：RestSharp.dll