基於ASP.Net +easyUI框架上傳圖片,實現圖片上傳,提交表單



<body> <link href="../../Easyui/themes/easyui.css" rel="stylesheet" type="text/css" /> <script charset="utf-8" src="../../Easyui/jquery.easyui.min.js" type="text/javascript"></script> <script charset="utf-8" src="../../Easyui/easyui-lang-zh_CN.js" type="text/javascript"></script> <script charset="utf-8" src="../../Js/jquery.form.js" type="text/javascript"></script> <script type="text/javascript"> //檢查圖片的格式是否正確,同時實現預覽 function setImagePreview(obj, localImagId, imgObjPreview) { var array = new Array('gif', 'jpeg', 'png', 'jpg', 'bmp'); //可以上傳的文件類型 if (obj.value == '') { $.messager.alert("讓選擇要上傳的圖片!"); return false; } else { var fileContentType = obj.value.match(/^(.*)(\.)(.{1,8})$/)[3]; //這個文件類型正則很有用 ////布爾型變量 var isExists = false; //循環判斷圖片的格式是否正確 for (var i in array) { if (fileContentType.toLowerCase() == array[i].toLowerCase()) { //圖片格式正確之后,根據瀏覽器的不同設置圖片的大小 if (obj.files && obj.files[0]) { //火狐下,直接設img屬性 imgObjPreview.style.display = 'block'; imgObjPreview.style.width = '200px'; imgObjPreview.style.height = '150px'; //火狐7以上版本不能用上面的getAsDataURL()方式獲取,需要一下方式 imgObjPreview.src = window.URL.createObjectURL(obj.files[0]); } else { //IE下,使用濾鏡 obj.select(); var imgSrc = document.selection.createRange().text; //必須設置初始大小 localImagId.style.width = "200px"; localImagId.style.height = "150px"; //圖片異常的捕捉,防止用戶修改后綴來偽造圖片 try { localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)"; localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc; } catch (e) { $.messager.alert("您上傳的圖片格式不正確,請重新選擇!"); return false; } imgObjPreview.style.display = 'none'; document.selection.empty(); } isExists = true; return true; } } if (isExists == false) { $.messager.alert("上傳圖片類型不正確!"); return false; } return false; } } //顯示圖片 function over(imgid, obj, imgbig) { //大圖顯示的最大尺寸 4比3的大小 400 300 maxwidth = 400; maxheight = 300; //顯示 obj.style.display = ""; imgbig.src = imgid.src; //1、寬和高都超過了,看誰超過的多,誰超的多就將誰設置為最大值,其余策略按照2、3 //2、如果寬超過了並且高沒有超,設置寬為最大值 //3、如果寬沒超過並且高超過了,設置高為最大值 if (img.width > maxwidth && img.height > maxheight) { pare = (img.width - maxwidth) - (img.height - maxheight); if (pare >= 0) img.width = maxwidth; else img.height = maxheight; } else if (img.width > maxwidth && img.height <= maxheight) { img.width = maxwidth; } else if (img.width <= maxwidth && img.height > maxheight) { img.height = maxheight; } }; //保存信息 function submitForm() { //先上傳圖片后,再提交 upLoadFile(); var test = document.getElementById("test").value = "add"; var tbName = document.getElementById("tbName").value; var idFile = document.getElementById("idFile").value; //先判斷是否上傳圖片之后在提交 $('#ff').form('submit', { url: "../../Handler/add.ashx?tbName=" + tbName + "&idFile=" + idFile + "&test=" + test, dataType: "json", onSubmit: function () { if ($(this).form('validate')) return true; else { return false; } }, success: function (data) { var dataJson = $.parseJSON(data); if (dataJson.success) { $("#add_address").dialog('destroy'); //銷毀dialog對象 $.messager.alert("提示", dataJson.msg) $("#dateList").datagrid("reload").datagrid('clearSelections').datagrid('clearChecked'); } else { $("#add_address").dialog('destroy'); //銷毀dialog對象 $.messager.alert("提示", dataJson.msg) } } }); } //上傳圖片 function upLoadFile() { var idFile = document.getElementById("idFile").value; //判斷是否選擇圖片 var options = { type: "POST", url: '../../Handler/InputImg.ashx' //success: showResponse }; // 將options傳給ajaxForm $('#ff').ajaxSubmit(options); } </script> <form id="ff" runat="server" method="post"> <table style="width: 422px; margin-top: 20px; height: 91px;"> <tr> <th style="text-align: right; width: 100px;" class="style1"> 鏈接名稱: </th> <td style="text-align: left" class="style1"> <asp:TextBox ID="tbID" runat="server" Style="display: none"></asp:TextBox> <asp:TextBox ID="tbName" runat="server" Width="274px" Height="20px" class="easyui-validatebox" data-options="required:true"></asp:TextBox> </td> </tr> <tr> <th style="text-align: right; " class="style2"> 鏈接logo: </th> <td class="style3"> <div style="width: 307px; height: 22px;"> 選擇圖片:<input id="idFile" style="width: 224px" runat="server" name="idFile" onchange="javascript:setImagePreview(this,localImag,preview);" type="file" /> </div> <%--預 覽: <div id="localImag"> <img id="preview" onclick="over(preview,divImage,imgbig);" src="" style="width: 200px; height: 150px;" /> </div>--%> </td> </tr> </table> <div style="width: 325px; text-align: center; margin-top: 20px; margin-left: 50px"> <input type="hidden" id="test" name="test" /> <a id="btn_sc" href="javascript:void(0)" class="easyui-linkbutton" onclick="submitForm()"> 上傳</a> <a href="Friendly.aspx" class="easyui-linkbutton">取消</a> </div> </form> </body>

提交表單的一般處理程序:

BLL.J_Friendly frend = null;
        Model.J_Friendly fr = null;
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string command = context.Request["test"].ToString();//前台傳的標示值  
            if (command == "add")
            {
                AddFrend(context);
            }
            if (command == "update")
            {
                UpdateFrend(context);
            }
        }

public void AddFrend(HttpContext context)
        {
            frend = new BLL.J_Friendly();
            fr = new Model.J_Friendly();
            string tbName = context.Request.QueryString["tbName"].Trim();
            if (frend.Exists("F_Name='" + tbName + "'"))
            {
                context.Response.Write("{\"msg\":\"添加失敗,鏈接名稱與已有的鏈接名稱重復!\",\"success\":false}");
                return;
            }
            else
            {

                try
                {
                    fr.F_Name = context.Request.QueryString["tbName"].Trim();

                }
                catch
                {
                    context.Response.Write("{\"msg\":\"添加失敗,請核對信息!\",\"success\":false}");
                    return;
                }
                try
                {
                    string img = context.Request.QueryString["idFile"].Trim();
                    if (img == "")
                    {
                        context.Response.Write("{\"msg\":\"添加失敗,請核對圖片信息!\",\"success\":false}");
                        return;
                    }
                    else
                    {
                        string str = context.Request.QueryString["idFile"].Trim();
                        string str1 = str.Remove(0, str.LastIndexOf("\\") + 1);
                        fr.F_Img = "../../Upload/Images/" + str1;
                    }

                }
                catch
                {
                    context.Response.Write("{\"msg\":\"添加失敗,請核對信息!\",\"success\":false}");
                    return;
                }
            }
            if (frend.Add(fr) > 0)
            {
                context.Response.Write("{\"msg\":\"添加成功!\",\"success\":true}");
            }
            else
            {
                context.Response.Write("{\"msg\":\"添加失敗,請核對信息!\",\"success\":false}");
            }
        }

 原型圖:

上傳圖片時,需要jquery.form.js的js文件,下載地址:http://download.csdn.net/detail/jiuqiyuliang/6919517

 


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