Question

我正在尝试通过Web API客户端将文件上传到数据库服务器

VB类如下

Public Class Uploads
Public Property FileName As String
Public Property uploadDateTime As DateTime
Public Property File As Byte()
End Class

然后ASP.NET用户使用ASP.NET Web表单上传文件。收到此文件后，我们需要通过httpClient

将其上传到服务器

    If FileUpload1.HasFile Then

        Dim newFile As New Uploads()

        newFile.FileName=FileUpload1.FileName
        newFile.uploadDateTime=DateTime.Now

        newFile.File = New Byte(FileUpload1.PostedFile.ContentLength) {}
        FileUpload1.FileContent.Read(newFile.File, 0, FileUpload1.PostedFile.ContentLength)

'Following class makes a call to web api
    Dim client As New apiClient()
    client.Upload(newFile)
        End if

Web API客户端（这是我被击中的地方。我们如何通过http客户端将类对象传递给web api）。

 Public Function Upload(ByVal newFile As Uploads)As Boolean


        Dim client As New HttpClient()
        client.BaseAddress = New Uri("http://localhost:8080/api/Upload")
        Dim content = New MultipartFormDataContent()

        'What I should do here to make a call to web api (cross domain)

return true
End Function

然后请求来到web api控制器，最终将通过Entity Framework将文件保存到数据库

<HttpPost()> _
    Public Sub PostValue(<FromBody()> ByVal newFile As Uploads)
        Using db As New DataContext()
            db.Uploadss.Add(newFile)
            db.SaveChanges()
        End Using

    End Sub

任何代码段都非常有用

ASP.NET Web Api客户端上传文件。将对象传递给post方法

0 个答案: