ASP.NET 上传文件方法

 

一、ASP.NET MVC  实现上传下载

 

1.首先是Form表单提交

   前台：

 <form action='@Url.Action("Upload", "File")' method="post" enctype="multipart/form-data">
      <input type="file" name="file" />
      <input type="submit" value="提交" />
 </form>

 

注意form标签已经包括了enctype标签，而method属性则设为”post”,这样设置并不多于因为默认的提交时通过HTTP get方式进行的。

 

  后台：

 public ActionResult Upload(HttpPostedFileBase file)
            {
                var fileName = file.FileName;
                var filePath = Server.MapPath(string.Format("~/{0}", "File"));
                file.SaveAs(Path.Combine(filePath, fileName));
                return Content("上传成功");
            }

2.前台：

a href='@Url.Action("Download", "File", new { fileName = "323152.jpg" })'>下载文件</a>

  

  
   public FileStreamResult Download(string fileName)
            {
                string filePath = Server.MapPath(string.Format("~/{0}/{1}", "File", fileName));
                FileStream fs = new FileStream(filePath, FileMode.Open);
                return File(fs, "text/plain", fileName);
            }

3.Ajax实现文件上传

 

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
    <title></title>
</head>
<body>
<form id="uploadForm" enctype="multipart/form-data">
    文件:<input id="file" type="file" name="file"/>
</form>
<button id="upload">上传文件</button>
</body>
<script type="text/javascript">
    $(function () {
        $("#upload").click(function () {
            var formData = new FormData($('#uploadForm')[0]);
            $.ajax({
                type: 'post',
                url: "http://192.168.1.101:8080/springbootdemo/file/upload",
                data: formData,
                cache: false,
                processData: false,
                contentType: false,
            }).success(function (data) {
                alert(data);
            }).error(function () {
                alert("上传失败");
            });
        });
    });
</script>
</html>
View Code

 

 二、Web.API 实现上传下载

/// <summary>
/// 文件上传
/// </summary>
public class UploadController : BaseController
{ 　　 [HttpPost]
    public Ret<object> PostUpload()
    {
        var httpRequest = HttpContext.Current.Request;
        List<string> list = new List<string>();

        for (int i = 0; i < httpRequest.Files.Count; i++)
        {
            var file = httpRequest.Files[i];
            if (file.ContentLength < 1 || file == null) continue;
            //文件存盘,返回Url
            list.Add(V9.Helper.Attach.Save(file));
        }
        return new Ret<object>() { error = 0, msg = "上传成功！", data = list };
    }
}
View Code

 

 

posted on 2020-07-22 16:32  爱探索的小子  阅读(325)  评论(0)  编辑  收藏  举报

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