WebApi上传文件

上网搜了下Web Api上传文件的功能，发现都写的好麻烦，就自己写了一个，比较简单，直接上传文件就可以，可以用Postman测试。

简单的举例

/// <summary>
/// 超级简单的文件上传
/// </summary>
public class EasyUploadFileController : ApiController
{
    /// <summary>
    /// 上传文件
    /// </summary>
    /// <returns></returns>
    [HttpPost]
    public string PostWithFile()
    {
        UploadWithFile(HttpContext.Current.Request);
        return "文件上传成功";
    }

    /// <summary>
    /// 上传文件
    /// </summary>
    /// <param name="request"></param>
    private void UploadWithFile(HttpRequest request)
    {
        for (int i = ; i < request.Files.Count; i++)
        {
            var file = request.Files[i];
            if (file.ContentLength <= ) continue;
            var ext = new FileInfo(file.FileName).Extension;
            var fullPath = Path.Combine(@"G:\Image", Path.GetFileName(Guid.NewGuid() + ext));
            file.SaveAs(fullPath);
        }
    }

}

结果

复杂举例带参数

public class UploadFileController : ApiController
{
    /// <summary>
    /// 8M
    /// </summary>
    public const int MAX_LENGTH =  *  * ;
    public const int MIN_WIDTH = ;
    public const int MIN_HEIGHR = ;

    /// <summary>
    /// 上传文件
    /// </summary>
    /// <returns></returns>
    [HttpPost]
    public string PostWithFile()
    {
        JObject jObject = GetParam(HttpContext.Current.Request);
        ParamModel model = GetParamModel(jObject);

        Tuple<bool, string> upload = UploadWithFile(HttpContext.Current.Request);
        return upload.Item2 + " 参数：" + JsonConvert.SerializeObject(model);
    }

    /// <summary>
    /// 上传文件
    /// </summary>
    /// <param name="request"></param>
    private Tuple<bool, string> UploadWithFile(HttpRequest request)
    {
        bool success = true;
        string message = string.Empty;
        for (int i = ; i < request.Files.Count; i++)
        {
            var file = request.Files[i];
            if (file.ContentLength <= ) continue;

            #region check的代码
            if (!FitFileLength(file))
            {
                message = message + file.FileName + "文件大小不能超过8M;";
                continue;
            }

            if (!FitImageSize(file))
            {
                message = message + file.FileName + "图片长宽分别不能小于600像素;";
                continue;
            }
            #endregion

            var ext = new FileInfo(file.FileName).Extension;
            var fullPath = Path.Combine(@"G:\Image", Path.GetFileName(Guid.NewGuid() + ext));
            file.SaveAs(fullPath);
        }

        if (string.IsNullOrEmpty(message))
        {
            message = "上传成功";
        }
        Tuple<bool, string> result = new Tuple<bool, string>(success, message);
        return result;
    }

    /// <summary>
    /// 符合文件大小
    /// </summary>
    /// <param name="file"></param>
    /// <returns></returns>
    private bool FitFileLength(HttpPostedFile file)
    {
        bool result = true;
        if (file.ContentLength >= MAX_LENGTH)
        {
            result = false;
        }
        return result;
    }

    /// <summary>
    /// 符合图片尺寸
    /// </summary>
    /// <param name="file"></param>
    /// <returns></returns>
    private bool FitImageSize(HttpPostedFile file)
    {
        bool result = true;
        var ext = new FileInfo(file.FileName).Extension;
        if (IsImage(ext))
        {
            Image image = Image.FromStream(file.InputStream);
            if (image.Height <= MIN_HEIGHR || image.Width <= MIN_WIDTH)
            {
                result = false;
            }
        }

        return result;
    }

    /// <summary>
    /// 监测是否是图片
    /// </summary>
    /// <param name="ext"></param>
    /// <returns></returns>
    public bool IsImage(string ext)
    {
        bool result = false;
        switch (ext.ToLower())
        {
            case (".jpg"):
            case (".png"):
            case (".gif"):
            case (".bmp"):
                result = true;
                break;
            default:
                result = false;
                break;
        }
        return result;
    }

    /// <summary>
    /// 获得参数
    /// </summary>
    /// <param name="request"></param>
    /// <returns></returns>
    private JObject GetParam(HttpRequest request)
    {
        JObject jObject = new JObject();
        foreach (string key in request.Form)
        {
            jObject[key] = request.Form[key];
        }
        return jObject;
    }

    /// <summary>
    /// 简单的Model转换
    /// </summary>
    /// <param name="request"></param>
    /// <returns></returns>
    private ParamModel GetParamModel(JObject jObject)
    {
        ParamModel model = new ParamModel();
        model.Param1 = jObject["Param1"] != null ? jObject["Param1"].ToString() : "";
        model.Param2 = jObject["Param2"] != null ? jObject["Param2"].ToString() : "";
        model.Param3 = jObject["Param3"] != null ? jObject["Param3"].ToString() : "";

        return model;
    }
}

Html测试

<div class="jumbotron">
    <form action="/UploadFile/PostWithFile" method="post" enctype="multipart/form-data" class="form-horizontal">
        <div class="form-group">
            <label for="Param1" class="col-xs-2">Param1</label>
            <input type="text" class="form-control col-xs-8" name="Param1" placeholder="Param1">
        </div>
        <div class="form-group">
            <label for="Param2" class="col-xs-2">Param2</label>
            <input type="text" class="form-control" name="Param2" placeholder="Param2">
        </div>
        <div class="form-group">
            <label for="Param3" class="col-xs-2">Param3</label>
            <input type="text" class="form-control" name="Param3" placeholder="Param3">
        </div>
        <div class="form-group">
            <label for="exampleInputFile" class="col-xs-2">File input</label>
            <input type="file" name="f1" />
            <input type="file" name="f2" />
            <input type="file" name="f3" />
        </div>
        <button type="submit" class="btn btn-default">上传图片</button>
    </form>
</div>

源码

https://github.com/jasonhua95/WebApiUploadFile.git