图片上传时我们进场用到的一个功能今天将他整理了一下写了个demo希望对大家有用
该demo分为如下
1.上传至至服务器文件夹
2.上传至阿里云oss
3.百度webupload上传图片
效果图如下:
首先讲解一下后台代码
(1)上传至服务器存储
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace ImageUpLoad.Controllers
{
public class UpLoadController : Controller
{
//定义存储文件夹
private string SavePath
{
get
{
return "/Register/";
}
}
#region uploadJson
public ActionResult NewUploadImg()
{
//文件保存目录URL
var saveUrl = SavePath;
//定义允许上传的文件扩展名
var extTable = new Hashtable
{
{"image", "gif,jpg,jpeg,png,bmp"}
};
//最大文件大小
const int maxSize = 4194304;
var imgFile = Request.Files[0];
//HttpPostedFile imgFile = context.Request.Files["imgFile"];
if (imgFile == null)
{
return NewShowError("请选择文件。", true);
}
var dirPath = Server.MapPath(SavePath);
if (!Directory.Exists(dirPath))
{
//return ShowError("上传目录不存在。" + dirPath);
Directory.CreateDirectory(dirPath);
}
var dirName = Request.QueryString["dir"];
if (String.IsNullOrEmpty(dirName))
{
dirName = "image";
}
if (!extTable.ContainsKey(dirName))
{
return NewShowError("目录名不正确。", true);
}
var fileName = imgFile.FileName;
var extension = Path.GetExtension(fileName);
if (extension == null)
{
return NewShowError("extension == null", true);
}
var fileExt = extension.ToLower();
if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
{
return NewShowError("上传文件大小超过限制。", true);
}
if (String.IsNullOrEmpty(fileExt) ||
Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
{
return NewShowError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。", true);
}
//创建文件夹
dirPath += dirName + "/";
saveUrl += dirName + "/";
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
var ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
dirPath += ymd + "/";
saveUrl += ymd + "/";
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
var newFileName = DateTime.Now.ToString("HHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
var filePath = dirPath + newFileName;
imgFile.SaveAs(filePath);
var fileUrl = saveUrl + newFileName;
var hash = new Hashtable();
return NewShowError(fileUrl, true);
}
private JsonResult NewShowError(string message, bool isImg)
{
var hash = new Hashtable();
hash["mess"] = message;
hash["isImg"] = isImg;
return Json(hash, "text/html;charset=UTF-8");
}
#endregion
//删除文件
public ActionResult DeleteImg(string fileSrc)
{
var dirPath = Server.MapPath(fileSrc);
if (System.IO.File.Exists(dirPath))
{
System.IO.File.Delete(dirPath);
}
return Json("");
}
}
}
(2)上传至oss服务器
using Aliyun.OSS;
using Aliyun.OSS.Common;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Threading;
using System.Web;
using System.Web.Mvc;
namespace ImageUpLoad.Controllers
{
public class NetUpLoadController : Controller
{
static string bucketName = Config.bucketName;//oss bucketName
static string accessKeyId = Config.AccessKeyId;//阿里云 aceesskeyid
static string accessKeySecret = Config.AccessKeySecret;//阿里云 AccessKeySecret
static string endpoint = Config.Endpoint;//oss Endpoint
static OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret);
static AutoResetEvent _event = new AutoResetEvent(false);
static HashAlgorithm hashAlgorithm = new MD5CryptoServiceProvider();
#region uploadJson
public ActionResult NewUploadImg()
{
string time = DateTime.Now.ToString("yyyy-MM-dd");
string NewsavePath = "Register/";
//文件保存目录URL
var saveUrl = NewsavePath;
//定义允许上传的文件扩展名
var extTable = new Hashtable
{
{"image", "gif,jpg,jpeg,png,bmp,pdf"}
};
//最大文件大小
const int maxSize = 15728640;
var imgFile = Request.Files[0];
if (imgFile == null)
{
return NewShowError("请上传出错,选择文件。", true);
}
var dirName = Request.QueryString["dir"];
if (String.IsNullOrEmpty(dirName))
{
dirName = "image";
}
if (!extTable.ContainsKey(dirName))
{
return NewShowError("上传出错,目录名不正确。", true);
}
var fileName = imgFile.FileName;
var extension = Path.GetExtension(fileName);
if (extension == null)
{
return NewShowError("上传出错,extension == null", true);
}
var fileExt = extension.ToLower();
if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
{
return NewShowError("上传出错,上传文件大小超过限制。", true);
}
if (String.IsNullOrEmpty(fileExt) ||
Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
{
return NewShowError("上传出错,上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。", false);
}
//创建文件夹
saveUrl += dirName + "/";
var ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
saveUrl += ymd + "/";
var newFileName = DateTime.Now.ToString("HHmmssffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
var filePath = saveUrl + newFileName;
var fileUrl = "/" + saveUrl + newFileName;
var hash = new Hashtable();
try
{
client.PutObject(bucketName, filePath, imgFile.InputStream);
//由于我的域名地址是oss前缀是https://quicktouch.oss-cn-beijing.aliyuncs.com
//这里返回前台的时候加上去
return NewShowError("https://quicktouch.oss-cn-beijing.aliyuncs.com"+fileUrl, true);
}
catch (OssException ex)
{
hash["error"] = 1;
hash["url"] = ex.Message;
return NewShowError("上传出错," + ex.Message, true);
}
catch (Exception ex)
{
hash["error"] = 1;
hash["url"] = ex.Message;
return NewShowError("上传出错," + ex.Message, true);
}
}
private JsonResult NewShowError(string message, bool isImg)
{
var hash = new Hashtable();
hash["mess"] = message;
hash["isImg"] = isImg;
return Json(hash, "text/html;charset=UTF-8");
}
#endregion
public ActionResult DeleteImg(string fileSrc)
{
try
{
//去除图片地址中前缀
int size = "https://quicktouch.oss-cn-beijing.aliyuncs.com/".Length;
fileSrc = fileSrc.Substring(size, fileSrc.Length - size);
client.DeleteObject(bucketName, fileSrc);
//hash["error"] = 0;
//hash["url"] = SiteURL + fileUrl;
}
catch (OssException ex)
{
}
catch (Exception ex)
{
}
return Json("");
}
}
}
(3)前端webupload代码
$('#upload-container').click(function (event) {
$("#picker").find('input').click();
});
var uploader = WebUploader.create({
auto: true,// 选完文件后，是否自动上传。
swf: 'https://cdn.bootcss.com/webuploader/0.1.1/Uploader.swf',// swf文件路径
server: '/UpLoad/NewUploadImg',// 文件接收服务端。
dnd: '#upload-container',
pick: '#picker',// 内部根据当前运行是创建，可能是input元素，也可能是flash. 这里是div的id
multiple: true, // 选择多个
chunked: true,// 开起分片上传。
threads: 1, // 上传并发数。允许同时最大上传进程数。
method: 'POST', // 文件上传方式，POST或者GET。
fileSizeLimit: 1024 * 1024 * 100 * 100, //验证文件总大小是否超出限制, 超出则不允许加入队列。
fileSingleSizeLimit: 1024 * 1024 * 100, //验证单个文件大小是否超出限制, 超出则不允许加入队列。
fileVal: 'upload', // [默认值：'file'] 设置文件上传域的name。
});
uploader.on('fileQueued', function (file) {
// 选中文件时要做的事情，比如在页面中显示选中的文件并添加到文件列表，获取文件的大小，文件类型等
console.log(file.ext) // 获取文件的后缀
console.log(file.size) // 获取文件的大小
console.log(file.name);
var html = '
文件名：' + file.name + '删除重试
$('#upload-list').append(html);
});
uploader.on('uploadProgress', function (file, percentage) {
console.log(percentage * 100 + '%');
var width = $('.upload-item').width();
$('.' + file.id).width(width * percentage);
});
uploader.on('uploadSuccess', function (file, response) {
console.log(file.id + "传输成功");
$("#" + file.id).val(response.mess);
$("#img_" + file.id).attr('src', response.mess);
});
uploader.on('uploadError', function (file) {
console.log(file);
console.log(file.id + 'upload error')
});
$('#upload-list').on('click', '.upload-item .btn-delete', function () {
// 从文件队列中删除某个文件id
file_id = $(this).data('file_id');
// uploader.removeFile(file_id); // 标记文件状态为已取消
uploader.removeFile(file_id, true); // 从queue中删除
var urlsrc = $("#" + file_id).val();
$.ajax({
url: '/UpLoad/DeleteImg',//地址
type: 'Post',//类型
data: { fileSrc: urlsrc },
timeout: 2000,//超时
//请求成功
success: function (data, status) {
//alert(status);
},
//失败/超时
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert('删除失败');
//alert(errorThrown);
}
})
$("#upload_" + file_id).remove();
alert("删除成功");
});
$('#upload-list').on('click', '.btn-retry', function () {
uploader.retry($(this).data('file_id'));
});
uploader.on('uploadComplete', function (file) {
console.log(uploader.getFiles());
});
注意我这里阿里云oss的读写方式是如果为私有的话需要加上读取时候的验证
public ActionResult GetSignedUrl(string Imgurl)
{
string restr = "";
try
{
OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret);
var request = new GeneratePresignedUriRequest(bucketName, Imgurl, SignHttpMethod.Get);//方式
request.Expiration = DateTime.Now.AddMinutes(60);//有限时间
var signedUrl = client.GeneratePresignedUri(request);
restr = signedUrl.ToString();
return Json(new { result = 1, data = restr, msg = "" }, JsonRequestBehavior.AllowGet);
//return restr;
}
catch (Exception ex)
{
return Json(new { result = 0, data = "", msg = ex.Message }, JsonRequestBehavior.AllowGet);
}
}
这里需要注意的是如果为公共读的话我input值取的是完整url地址去存数据库
而私有读的话我只取了阿里云的文件地址并没有加上域名，因为私有的你要通过存储的文件地址去加上key和有效时间才能访问图片
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