WCF/C#上载文件

本文关键字：文件 上载 WCF | 更新日期: 2023-09-27 18:26:19

我目前正在使用C#和WCF开发web服务。我需要制作一个上传方法，所以我遵循本教程。现在我可以通过表单上传文件，文件被上传到文件夹中，但在浏览器中。它总是告诉我有一个错误（如ajax中指定的）。这里所有的代码：

IWebService.cs

[ServiceContract]
public interface IWebService
{
    [OperationContract]
    [WebInvoke(Method = "POST", UriTemplate = "/UploadFile?fileName={fileName}")]
    void UploadFile(string fileName, Stream stream);
}

WebService.svc

public void UploadFile(string fileName, Stream stream)
{
    string FilePath = Path.Combine(HostingEnvironment.MapPath("~/FileServer/Uploads"), fileName);
    int length = 0;
    using (FileStream writer = new FileStream(FilePath, FileMode.Create))
    {
        int readCount;
        var buffer = new byte[8192];
        while ((readCount = stream.Read(buffer, 0, buffer.Length)) != 0)
        {
            writer.Write(buffer, 0, readCount);
            length += readCount;
        }
    }
}

TestClient.html

<head>
<script type="text/javascript">
    function UploadFile() {
        fileData = document.getElementById("fileUpload").files[0];
        var data = new FormData();
        $.ajax({
            url: 'http://localhost:1945/Service1.svc/UploadFile?fileName=' + fileData.name,
            type: 'POST',
            data: fileData,
            cache: false,
            dataType: 'json',
            processData: false, // Don't process the files
            contentType: "application/octet-stream", // Set content type to false as jQuery will tell the server its a query string request
            success: function (data) {
                alert('successful..');
            },
            error: function (data) {
                alert('Some error Occurred!');
            }
        });
    }
</script>
<title></title>
</head>
<body>
<div>
    <div>
        <input type="file" id="fileUpload" value="" />
        <br />
        <br />
        <button id="btnUpload" onclick="UploadFile()">
            Upload
        </button>
    </div>
</div>
</body>

WCF/C#上载文件

我试图用的方式解决你的问题

  1. 将UploadCustomFile方法的retun类型更改为String，并返回一条伪消息

    public String UploadCustomFile（字符串文件名，System.IO.Stream流）{string FilePath=Path.Combine（HostingEnvironment.MapPath（"~/FileServer/Uploads"），fileName）；

    int length = 0;
using (FileStream writer = new FileStream(FilePath, FileMode.Create))
{
    int readCount;
    var buffer = new byte[8192];
    while ((readCount = stream.Read(buffer, 0, buffer.Length)) != 0)
    {
        writer.Write(buffer, 0, readCount);
        length += readCount;
    }
}
    try
    {
        //do something else
    }
    catch
    {      
            //to return custom error message - ajax will catch this as a error
            HttpContext.Current.Response.Write("");
            return "not okey";
    }
return "okey";
}

  2. 通过添加ResponseFormat=WebMessageFormat.Json和String返回类型来更改接口方法

    [OperationContract]
[WebInvoke(ResponseFormat = WebMessageFormat.Json, Method = "POST", UriTemplate = "/UploadFile?fileName={fileName}")]
String UploadCustomFile(string fileName, Stream stream);

当我尝试这种方式时，我收到了成功警报消息

从服务器端发送自定义异常

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