附件上传 使用javascript
1 <html xmlns="http://www.w3.org/1999/xhtml"> 2 <head id="Head1" runat="server"> 3 <title></title> 4 <script type="text/javascript"> 5 function ShowImg(obj) { 6 var a = obj.toString(); 7 var isNumber = /^[1-30]$/; 8 var img = "0"; 9 if (isNumber.test(a)) { 10 img = a; 11 a = "div_" + a; 12 } 13 var docObj = document.getElementById(a); 14 var img1 = document.getElementById("img_"+img); 15 if (docObj.files && docObj.files[0]) { 16 //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式 17 img1.src = window.URL.createObjectURL(docObj.files[0]); 18 document.getElementById("sname").value += img1.src+" "; 19 } 20 return true; 21 } 22 //设置ID变量参数 23 var fileId = 1; 24 var fileId_ = 1; 25 //添加附件 生成一个DIV 里面包含file控件和图片 26 function addFile() { 27 //获取div(包含file控件和图片) 28 var FilesDiv = document.getElementById('FilesDiv'); 29 //设置一个DIV的id为“div1” 30 var divId = "div" + fileId; 31 //拼接一个div 让其ID自增长 可一直添加 32 var str = '<div id="' + divId + '">'; 33 str += '<img id="img_' + fileId + '" src="" style=" width:100px; height:100px" /><br />' 34 str += '<input type="file" size="40" id="div_' + fileId + '" onchange="ShowImg(\'' + fileId + '\')" name="File" style="border: solid 1px #0077B2">' 35 str += ' <img src="../images/icon_stop.gif" onclick="delFile(\'' + divId + '\')"/>'; 36 str += "<div>"; 37 FilesDiv.insertAdjacentHTML("beforeEnd", str) 38 fileId++; 39 } 40 function delFile(obj) { 41 var FilesDiv = document.getElementById('FilesDiv'); 42 var elem = document.getElementById(obj); 43 FilesDiv.removeChild(elem); 44 } 45 function Sub() { 46 var len = document.getElementById('FilesDiv').getElementsByTagName('input'); 47 if (len.length != 0) { 48 for (var i = 0; i < len.length; i++) { 49 if (len[i].type == "file") { 50 if (len[i].value == "") { 51 alert('请选择要上传的附件！'); 52 return false; 53 } 54 else { 55 56 } 57 } 58 } 59 } 60 else { 61 alert('请选择要上传的附件！'); 62 return false; 63 } 64 } 65 </script> 66 </head> 67 <body> 68 <form id="form1" runat="server"> 69 <div> 70 <div id="FilesDiv"> 71 <div id="div0"> 72 <img id="img_0" src="" style=" width:100px; height:100px" /><br /> 73 <input type="file" runat="server" size="40" name="File" id="file0" onchange="ShowImg('file0')" style="border: solid 1px #0077B2" /> 74 <img src="../images/icon_stop.gif" onclick="delFile('div0')" /> 75 </div> 76 </div> 77 <input type="button" value="添加附件" onclick="addFile();return false" id="btnInput" runat="server" /> 78 <asp:Button ID="btnUpload" runat="server" Text="上传附件" OnClick="btnUpload_Click" OnClientClick="return Sub();"/><P> 79 </P> 80 <input type="hidden" name="sname" id="sname" /> 81 </div> 82 </form> 83 </body> 84 </html>
后台
1 protected void Page_Load(object sender, EventArgs e) 2 { 3 if (!IsPostBack) 4 { 5 6 } 7 } 8 /// 检测指定的文件夹是否存在，不存在就创建 9 /// </summary> 10 /// <param name="imgpath">该文件夹的之前的路径，注意一定要带上"/"</param> 11 /// <returns></returns> 12 public static string CheckFile() 13 { 14 //命名一个今天的文件夹 15 string folder = DateTime.Now.ToString("yyyyMMdd"); 16 17 //判断文件是否存在 18 if (!System.IO.Directory.Exists(folder)) 19 { 20 //自动生成文件夹 21 System.IO.Directory.CreateDirectory(folder); 22 23 //生成后返回文件夹名 24 return folder; 25 } 26 27 //如果存在，直接返回今天的文件夹名 28 return folder; 29 } 30 31 protected void btnUpload_Click(object sender, EventArgs e) 32 { 33 if (Request.Form["sname"] != null) 34 { 35 //获取到附件存放的URL 36 string UrlName = Request.Form["sname"]; 37 string[] strArr = UrlName.Split(' '); 38 } 39 //声明名称、大小、类型等几个变量 40 string f_name, f_size, f_tye; 41 HttpFileCollection hfc = Request.Files; 42 for (int i = 0; i < hfc.Count; i++) 43 { 44 HttpPostedFile hpf = hfc[i]; 45 f_name = hpf.FileName; 46 f_size = hpf.ContentLength.ToString(); 47 f_tye = hpf.ContentType; 48 49 } 50 51 }
今天写到这。。。。。
