Web服務方法名稱無效（通過ajax w/html5 formdata將文件上傳到aspx web服務）

Question

我正嘗試使用formdata和html5將文件上傳到aspx web服務。如果我沒有在ajax調用中設置內容類型，它將看不到web服務。如果我將它設置爲json，它會傳入空數據。

var formData = new FormData(); 
    file = $("#fileToUpload")[0].files[0]; 
    formData.append("file", file); 

    $.ajax({ 
     url: 'http://localhost:50101/xxxxx.asmx/UploadFile', //server script to process data 
     type: 'POST', 
     success: function(msg) {  
      console.log("error | " + JSON.stringify(msg)); 
     }, 
     error: function(msg) { 
      console.log("Success | " + JSON.stringify(msg));  
     }, 
     data: formData, 
     //data: {' + JSON.stringify(formdata)+'}, 
     cache: false, 
     contentType: false, 
     processData: false 
    }); 
}); 


<form enctype="multipart/form-data"> 
    <input id="fileToUpload" type="file" /> 
    <input type="button" value="Upload" /> 
</form> 



//....webservice.... 
    public String UploadFile(Object fileStreams) 
     { 
... 
} 

Answer 1

使用JSON類型

jQuery.ajax({ 
     type: "POST", // or GET 
     url: "http://localhost:50101/xxxxx.asmx/UploadFile", 
     data: formdata, 
     contentType: "application/json; charset=utf-8", 
     dataType: "json" 
     success: function(msg) {  
     console.log("error | " + JSON.stringify(msg)); 
     }, 
     error: function(msg) { 
     console.log("Success | " + JSON.stringify(msg)); 
     } 
    }); 

，並檢查是否添加[webmethod]屬性和方法聲明不存在static修飾符。