ASP.Net MVC3 图片上传详解(form.js,bootstrap)
图片上传的插件很多,但很多时候还是不能切合我们的需求,我这里给大家分享个我用一个form,file实现上传四张图片的小demo。完全是用jquery前后交互,没有用插件。
最终效果图如下:
玩过花田人可能有些眼熟,原型就是来自于花田网中的图片上传。
引用的脚本有:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<script src="../../Scripts/jquery-ui-1.9.2.custom.min.js"></script> <script src="../../Scripts/jquery-1.8.3.js"></script> <link href="../../Content/bootstrap/css/bootstrap.min.css" rel="stylesheet" /> <script src="../../Content/bootstrap/js/bootstrap.min.js"></script> <script src="../../Content/JS/form.js"></script>
基本思路:用户点击相关div触发file元素打开浏览框----》用setInterval不断检测file文件是否选中文件---》选中之后触发form自动提交到后台---》后台将文件存储到临时文件夹返回图片在临时文件夹的地址---》窗口提示上传功能并预览图片---》用户点击发布---》后台保存图片(移动到指定文件夹,并存入数据库)
整个过程form和file都是隐藏的。另外的效果
1. 开始的时候只显示一个上传框,前一个上传完成后,显示下一个上传框。并总是显示在最后面。
2. 有图片的时候才能提交和输入描述。
3.上传成功之后,删除后才能再次上传。
Html+css
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
.uploadbox {
float: left;width: 115px;height: 115px;
background-color: #eeeeee;
margin-right: 10px;color: white;text-align: center;cursor: pointer;
position: relative;display: none;
}
.uploadbox:hover {
background-color: #b4b4b4;
}
.stt{ font-size: xx-small;display: block;}
.add{ vertical-align: baseline;display: block;height: auto;font-size: 8em; height: 40px;padding: 10px;margin-top: 30px}
.imgcontainer{ width: 100%;height: 100%} .imgcontainer img{ max-height: 115px;max-width: 115px;}
.inputdiv{ clear: both;display: block;padding-top: 10px;}
#Remark{ width:478px;}
.infospan{display: none; height: 20px;position: absolute;bottom: 0;right: 0;width: 100%;background-color: #00bfff;z-index: 1;clear: both;opacity: 0.8;}
.closespan{display: none; position: absolute;right: -7px;top: -7px;width: 14px;height: 14px;border-radius: 7px;background-color: white;border: 1px gainsboro solid;color: gray;
font-weight: bold;font-size: medium;
line-height: 16px;
} .closespan:hover{ color: red;}
#imgupload form{ display: none;}
.imguploadmessage{ font-size: small;color: green;float: left;margin-left: 10px;}
.carclose{ cursor: pointer;
background-color: white;opacity: 1;
position: absolute;z-index: 99;top:0px;right: -40px;
width: 40px;height:40px;border-radius: 20px;text-align: center;
line-height: 40px;font-size: 2em;color: gray;
}.carclose:hover{ color: green;background-color: #eeeeee}
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<div id="imgupload" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4>上传图片</h4>
</div>
<div class="modal-body">
<div class="uploadbox" data-count="0" style="display: inline;">
<span class="closespan" title="删除照片">×</span>
<div class="imgcontainer">
<div class="add">+</div>
<div class="stt">点击上传</div>
</div>
<span class="infospan">
<img src='../../Content/Photos/loading.gif' />正在上传...</span>
</div>
<div class="uploadbox" data-count="0" >
<span class="closespan" title="删除照片">×</span>
<div class="imgcontainer">
<div class="add">+</div>
<div class="stt">点击上传</div>
</div>
<span class="infospan"> <img src='../../Content/Photos/loading.gif' />正在上传...</span>
</div>
<div class="uploadbox"data-count="0" >
<span class="closespan" title="删除照片">×</span>
<div class="imgcontainer">
<div class="add">+</div>
<div class="stt">点击上传</div>
</div>
<span class="infospan"> <img src='../../Content/Photos/loading.gif' />正在上传...</span>
</div>
<div class="uploadbox"data-count="0" >
<span class="closespan" title="删除照片">×</span>
<div class="imgcontainer">
<div class="add">+</div>
<div class="stt">点击上传</div>
</div>
<span class="infospan"> <img src='../../Content/Photos/loading.gif' />正在上传...</span>
</div>
<div class="inputdiv"><input type="text" disabled="disabled" id="Remark" name="Remark" placeholder="补充说明下~"/></div>
</div>
<div class="modal-footer">
上传大小在8k-10M之间 <span class="imguploadmessage"></span>
<button class="btn btn-success " disabled="disabled" id="imgsubmit">发布</button>
<form action="/User/UpLoadPhoto" method="POST" enctype="multipart/form-data" name="ImgForm" id="ImgForm">
<input type="file" name="file" id="imgFlie" required="required" />
<input type="submit" name="subt" value="上传图片" />
</form>
</div>
</div>
Jquery:
//图片上传-------------------------------------imgupload--------------------- var imgbox = {};//用来获取当前点击的 uploadbox var childs = $(".imgcontainer:eq(0)").html();// 先保存内部元素,上传完成之后方便恢复到最初状态 $(".uploadbox").click(function () { var tag = $(this).attr("data-count");//用来判断是否已经含有照片 if (tag == "1") return false; $("#imgFlie").click(); imgbox = $(this); var stm1 = setInterval(function () { var imgstr = $("#imgFlie").val(); //检测file元素是否已经含有文件 if (imgstr != "") { clearInterval(stm1); $("#ImgForm input[type='submit']").click(); } }, 500); return false; }); // 取消照片 $(".closespan").click(function (e) { e.stopPropagation(); var sum = $(".uploadbox img").length; // 保证有一个框可以让用户再次选择 需要显示childs 设置data-count属性 必要的再隐藏 var imgsrc = $(this).next().find("img").attr("src"); $(this).next().html("").append(childs); // 隐藏关闭和成功提示 $(this).hide(); $(this).siblings(".infospan").hide(); $(this).parent().attr("data-count", 0).insertBefore($(".inputdiv"));; if (sum < 4) {//说明此时是有一个再准备状态,这个可以直接做删除处理 // 设置data-count 并隐藏父级 $(this).parent().hide(); //需要移位 保证准备状态的总是在最后一个 } // 清除session 减少一个字符串 if (imgsrc != undefined) { $.post("/User/DeleteImg", { str: imgsrc }, function () { }); } if (sum == 1) { $('#Remark,#imgsubmit').attr("disabled", "disabled");// 说明这个时候还没有图片上传,所以要禁止发布键和描述框 } }); //----------上传图片--------------------------------------------- $("#imgsubmit").click(function () { var imgcontent = $.trim($("#Remark").val()); $.post("/User/SaveImgs", { content: imgcontent }, function (data) { if (data == 1) { //清除content $(".imgcontainer").html(childs); //隐藏进度条和关闭键 $(".closespan,.infospan").hide(); $(".imguploadmessage").html("上传成功!"); //禁止输入框和提交按钮 $('#Remark,#imgsubmit').attr("disabled", "disabled"); //去掉data-count 属性 显示第一个; $(".uploadbox").attr("data-count", 0).hide().eq(0).show(); //清空 $("#Remark").val(""); var stt = setTimeout(function () { $("#imgupload").modal('hide'); $(".imguploadmessage").html(""); clearTimeout(stt); }, 1000); } }); }); $('#ImgForm').ajaxForm({//用到form.js 提交form beforeSend: function () { imgbox.find(".infospan").show();//显示正在上传... }, success: function (data) { $("#imgFlie").val("");// imgbox.find(".imgcontainer").html(data);//.hide() var img = imgbox.find(".imgcontainer").find("img").attr("src"); if (img != undefined) {//表示上传成功 //解禁 $('#Remark').removeAttr("disabled"); $('#imgsubmit').removeAttr("disabled"); imgbox.find(".infospan,.closespan").show(); imgbox.find(".infospan").html("上传成功!"); //显示下一个 //imgbox.next().show(); $(".uploadbox:hidden").eq(0).show(); imgbox.attr("data-count", "1"); } else { imgbox.find(".infospan,.closespan").hide(); } // alert(img); }, complete: function (xhr) { $("#imgFlie").val(""); } });
后台controller的代码
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
[HttpPost]
public void UpLoadPhoto(HttpPostedFileBase file)
{
var res = CheckImg(file);
if (res == "ok")
{
var fileName = file.FileName;//Path.GetExtension() 也许可以解决这个问题,先不管了。
var pathtemp = Path.Combine(Server.MapPath("../Content/TempFile/"), fileName);//先存入临时文件夹
var scrtemp = Path.Combine("../../Content/TempFile/", fileName);//图片展示的地址
var list = Session["Imgscr"] as List<string>;
var slist = Session["ImgServerscr"] as List<string>;
if (list != null)
{
list.Add(scrtemp);
}
else
{
list = new List<string> { scrtemp };
Session["Imgscr"] = list;
}
if (slist != null)
{
slist.Add(pathtemp);
}
else
{
slist = new List<string> { pathtemp };
Session["ImgServerscr"] = slist;
}
file.SaveAs(pathtemp);
Response.Write("<img src='../../Content/TempFile/" + fileName + "' /> ");
}
else
{
Response.Write(res);
}
}
/// <summary>
/// 删除预览中的照片
/// </summary>
/// <param name="str">这个str 已经是处理过的,不是之前上传的图片名称</param>
public void DeleteImg(string str)
{
//删除地址 删除文件
var list = Session["Imgscr"] as List<string>;
if (list == null) return;
var index = list.IndexOf(str);
var slist = Session["ImgServerscr"] as List<string>;
if (slist != null && index != -1)
{
var imgone = slist[index];
if (imgone != null)
{
var img = new FileInfo(imgone);
if (img.Exists) img.Delete();
}
}
list.Remove(str);
}
private string CheckImg(HttpPostedFileBase file)
{
if (file == null) return "图片不能空!";
if (file.ContentLength / 1024 > 8000)
{
return "图片太大";
}
if (file.ContentLength / 1024 < 10)
{
return "图片太小!";
}
var image = GetExtensionName(file.FileName).ToLower();
if (image != ".bmp" && image != ".png" && image != ".gif" && image != ".jpg" && image != ".jpeg")// 这里你自己加入其他图片格式,最好全部转化为大写再判断,我就偷懒了
{
return "格式不对";
}
var scrtemp = Path.Combine("../../Content/TempFile/", file.FileName);//图片展示的地址
var list = Session["Imgscr"] as List<string>;
if (list != null && list.Find(n => n == scrtemp) != null)
{
return "同样的照片已经存在!";
}
return "ok";
}
public JsonResult SaveImgs(string content)
{
var uid = CheckValid();
if (_uName == null) _uName = GetUserNameById(uid);
string path = Path.Combine(HttpContext.Server.MapPath("../Content/UploadFiles/"), _uName, "Photos", "ImgBox");
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
var list = Session["Imgscr"] as List<string>;
var finallist = new List<string>();
if (list == null) return Json(0);
foreach (var str in list)
{
var scrtemp1 = Server.MapPath(str.Substring(3, str.Length - 3));//去掉第一个../
var img = new FileInfo(scrtemp1);
if (img.Exists)
{
var image = GetExtensionName(img.Name);
//处理照片名称
var imgname = string.Format("{0:yyyMMdd}", DateTime.Now).Replace("/", "") + DateTime.Now.Ticks.ToString(CultureInfo.InvariantCulture).Substring(7, 11) + image;
var scrdestination = Path.Combine(HttpContext.Server.MapPath("../Content/UploadFiles/"), _uName, "Photos", "ImgBox", imgname);
var scrshow = Path.Combine(("../../Content/UploadFiles/"), _uName, "Photos", "ImgBox", imgname);
finallist.Add(scrshow);
//移动照片
img.MoveTo(scrdestination);
//存入imgbox
var box = new Iamgbox
{
ActionTime = DateTime.Now,
BoxName = _uName,
ImgUrl = scrshow,
IsValid = true, //默认是正规合适的图片 不合适在检举
PraiseCount = 0,
Remark = content,
UserId = uid,
VisitCount = 0,
};
LoveDb.Add(box);
};
}
if (finallist.Count() != 0)
{
var sbstr = new StringBuilder("<br/><div class='imgtigger'>");
foreach (var str in finallist)
{
sbstr.Append("<img src='" + str + "' />");
}
sbstr.Append("</div>");
var state = new State
{
ActionTime = DateTime.Now,
Content = (content == "" ? string.Format("刚刚上传了{0}张照片:", finallist.Count) : content)+sbstr,
PraiseCount = 0,
StateType = StateType.Image.ToString(),
UserId = uid
};
LoveDb.Add(state);
Session.Remove("Imgscr");
Session.Remove("ImgServerscr");
}
return Json(1);
}
public string GetExtensionName(string fileName)
{
if (fileName.LastIndexOf("\\", StringComparison.Ordinal) > -1)//在不同浏览器下,filename有时候指的是文件名,有时候指的是全路径,所有这里要要统一。
{
fileName = fileName.Substring(fileName.LastIndexOf("\\", StringComparison.Ordinal) + 1);//IndexOf 有时候会受到特殊字符的影响而判断错误。加上这个就纠正了。
}
return Path.GetExtension(fileName.ToLower());
}
到这,这个过程就完成了,希望对你有帮助。