图片上传,网上有好多版本,今天小编给大家分享jquery.uploadView 实现图片预览上传功能,感兴趣的的朋友一起看看吧
图片上传,网上有好多版本,今天也要做一个查了好多最终找到了一个uploadview 进行了一下修改
来看代码
@{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>Index</title> <script src="~/Scripts/jquery-1.8.2.min.js"></script> <script src="~/Scripts/jquery.uploadView.js"></script> </head> <body> <p> <p class="shangchuan"> <h4>示例</h4> <p class="js_uploadBox" style="position: relative"> <p id="preview" class="js_showBox"> <img id="imghead" border="0" src="http://static.neihanhongbao.com/highads/images/nologo.jpg" alt="上传图片" style="width:100px; height:100px" /> </p> <input type="file" name="file" id="id" style="position: absolute; top: 0px; left:0px; height: 100px; filter: alpha(opacity:0); opacity: 0; width: 100px" onclick="Upload()"> </p> <input type="hidden" id="hidTmp_ID" name="Tmp_ID" value="" /> </p> </p> </body> </html> <script type="text/javascript"> function Upload() { $("#id").uploadView({ uploadBox: '.js_uploadBox',//设置上传框容器 showBox: '.js_showBox',//设置显示预览图片的容器 width: '100', //预览图片的宽度,单位px height: '100', //预览图片的高度,单位px allowType: ["gif", "jpeg", "jpg", "bmp", "png"], //允许上传图片的类型 maxSize:1, //允许上传图片的最大尺寸,单位M success: function (e) { var l = $(".js_showBox img").attr("src"); $("#hidTmp_ID").val(l); } }); } </script>
代码前台看起来很简单。
实现的效果也还可以,不过这个保存的是base64的图片,插入数据库的时候我们一般都是保存xxxx.jpg 故需要实现一个方法
/// <summary> /// base64转图片 /// </summary> /// <returns></returns> public static string BaseToImg(string baseimg) { byte[] bt = Convert.FromBase64String(baseimg.Replace("data:image/jpeg;base64,", "")); string filepath = "ImgServer".GetAppsetting(); string sqlurl = @"" + DateTime.Now.ToString("yyyyMMdd") + "\\"; string sqlname = "" + DateTime.Now.ToString("yyyyMMddhhmmssmsfff") + ".jpg"; if (!System.IO.File.Exists(filepath + sqlurl)) { System.IO.Directory.CreateDirectory(filepath + sqlurl); System.IO.File.WriteAllBytes(filepath + sqlurl + sqlname, bt); } return sqlurl + sqlname; }
这里我是根据日期对文件夹分组了,并且保存到数据库。避免单个文件太大
效果图类似这样
这个同样也适用于手机上
总结
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