C# webApi上传图片 代码篇
十年河东，十年河西，莫欺少年穷
学无止境，精益求精
代码篇，不多说
如下：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Http;
namespace FileUp.Controllers
{
public class FileController : ApiController
{
[HttpPost]
public async Task<string> UploadFileStream()
{
string returns = string.Empty;
string fileType = "ss";//要创建的子文件夹的名字
var uploadPath = "~/upload";
string filePath = System.Web.HttpContext.Current.Server.MapPath(uploadPath + "/" + fileType + "/");//绝对路径
//string filePath = uploadPath + "\\" + fileType + "\\"; //E:\Fileup 居家
if (Directory.Exists(filePath) == false)
{
Directory.CreateDirectory(filePath);
}
try
{
var provider = new ReNameMultipartFormDataStreamProvider(filePath);
await Request.Content.ReadAsMultipartAsync(provider).ContinueWith(o =>
{
foreach (var file in provider.FileData)
{
string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');//待上传的文件名
FileInfo fileinfo = new FileInfo(file.LocalFileName);
//判断开始
int maxSize = 10000000;
string oldName = orfilename;//选择的文件的名称
if (fileinfo.Length <= 0)
{
//文件大小判断 未选择上传的图片 大小为零
}
else if (fileinfo.Length > maxSize)
{
//文件大小判断 上传文件是否超限制
}
else
{
//
string fileExt = orfilename.Substring(orfilename.LastIndexOf('.'));
string Extension = fileExt;
string CreateTime = DateTime.Now.ToString("yyyyMMddHHmmss");
//定义允许上传的文件扩展名
String fileTypes = "gif,jpg,jpeg,png,bmp";
if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring(1).ToLower()) == -1)
{
returns = "上传的文件格式不是图片";
}
else
{
returns = string.Format(@"/Uploads/{0}/{1}", fileType, System.IO.Path.GetFileName(file.LocalFileName));
}
}
}
});
}
catch (Exception ex)
{
returns = ex.ToString();
}
return returns;
}
/// <summary>
/// 重命名上传的文件
/// </summary>
public class ReNameMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
{
public ReNameMultipartFormDataStreamProvider(string root)
: base(root)
{ }
public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers)
{
string extension = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? Path.GetExtension(GetValidFileName(headers.ContentDisposition.FileName)) : "";
return Guid.NewGuid().ToString().Replace("-", "") + extension;
}
private string GetValidFileName(string filePath)
{
char[] invalids = System.IO.Path.GetInvalidFileNameChars();
return String.Join("_", filePath.Split(invalids, StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
}
}
}
}
PostMan请求如下：
2021-01-07 代码优化如下：
using Iot.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web;
using System.Web.Http;
using System.Web.Http.Cors;
namespace Iot.WebSite.Controllers.Apis
{
[RoutePrefix("api/file")]
[EnableCors(origins: "*", headers: "*", methods: "GET,POST,PUT,DELETE")]
public class FileController : ApiController
{
/// <summary>
/// 上传文件
/// </summary>
/// <returns></returns>
[HttpPost]
public async Task<BaseResponse> UploadFileStream()
{
var returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false);
string fileType = "OTA";//要创建的子文件夹的名字
var uploadPath = "~/Content";
string filePath = System.Web.HttpContext.Current.Server.MapPath(uploadPath + "/" + fileType + "/");//绝对路径
//string filePath = uploadPath + "\\" + fileType + "\\"; //E:\Fileup 居家
if (Directory.Exists(filePath) == false)
{
Directory.CreateDirectory(filePath);
}
try
{
var provider = new ReNameMultipartFormDataStreamProvider(filePath);
await Request.Content.ReadAsMultipartAsync(provider).ContinueWith(o =>
{
foreach (var file in provider.FileData)
{
string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');//待上传的文件名
FileInfo fileinfo = new FileInfo(file.LocalFileName);
//判断开始
int maxSize = 1024*1024*100; //小于100M的文件
string oldName = orfilename;//选择的文件的名称
if (fileinfo.Length <= 0)
{
returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false, "未选择上传的附件");
//文件大小判断 未选择上传的图片 大小为零
}
else if (fileinfo.Length > maxSize)
{
returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false, "上传文件大小超限制");
//文件大小判断 上传文件是否超限制
}
else
{
//
string fileExt = orfilename.Substring(orfilename.LastIndexOf('.'));
string Extension = fileExt;
string CreateTime = DateTime.Now.ToString("yyyyMMddHHmmss");
//定义允许上传的文件扩展名
String fileTypes = "bin";
if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring(1).ToLower()) == -1)
{
returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false, "上传的文件格式不正确");
}
else
{
fileInfoModel fileResult = new fileInfoModel()
{
oldfilename = oldName,
LocalFilePath = file.LocalFileName,
filesize = fileinfo.Length,
filename= fileinfo.Name,
filepath= uploadPath + "/" + fileType + "/" + fileinfo.Name
};
var fs = fileinfo.OpenRead();
byte[] buffur = new byte[fs.Length];
fs.Read(buffur, 0, (int)fs.Length);
fileResult.filedata = buffur.ToList();
returns = CommonBaseResponse.SetResponse<fileInfoModel>(fileResult, true);
}
}
}
});
}
catch (Exception ex)
{
LogHelper.WriteLog("上传附件出错：" + ex.ToString());
}
return returns;
}
}
/// <summary>
/// 重命名上传的文件
/// </summary>
public class ReNameMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
{
public ReNameMultipartFormDataStreamProvider(string root)
: base(root)
{ }
public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers)
{
string extension = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? Path.GetExtension(GetValidFileName(headers.ContentDisposition.FileName)) : "";
return Guid.NewGuid().ToString().Replace("-", "") + extension;
}
private string GetValidFileName(string filePath)
{
char[] invalids = System.IO.Path.GetInvalidFileNameChars();
return String.Join("_", filePath.Split(invalids, StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
}
}
public class fileInfoModel
{
/// <summary>
/// 新文件名称
/// </summary>
public string filename { get; set; }
/// <summary>
/// 老文件名称
/// </summary>
public string oldfilename { get; set; }
/// <summary>
/// 服务器绝对地址
/// </summary>
public string LocalFilePath { get; set; }
/// <summary>
/// 文件大小 字节
/// </summary>
public long filesize { get; set; }
/// <summary>
/// 问价数据
/// </summary>
public List<byte> filedata { get; set; }
/// <summary>
/// 文件相对路径
/// </summary>
public string filepath { get; set; }
}
}
返回值：
antd+vue 上传代码
<a-row align="middle" class="arowLat">
<a-col :span="12">
<a-checkable-tag v-model="checked" @change="handleChange">
OTA固件包
</a-checkable-tag>
<a-upload
action="http://xxxxxxxx.com/api/File/UploadFileStream"
>
<a-button> <a-icon type="upload" /> 选择升级固件 </a-button>
</a-upload>
</a-col>
<a-col :span="12"> </a-col>
</a-row>
