基于ASP.Net +easyUI框架上传图片，实现图片上传，提交表单


 <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">
        //检查图片的格式是否正确,同时实现预览
        function setImagePreview(obj, localImagId, imgObjPreview) {
            var array = new Array('gif', 'jpeg', 'png', 'jpg', 'bmp'); //可以上传的文件类型
            if (obj.value == '') {
                $.messager.alert("让选择要上传的图片!");
                return false;
            }
            else {
                var fileContentType = obj.value.match(/^(.*)(\.)(.{1,8})$/)[3]; //这个文件类型正则很有用 
                ////布尔型变量
                var isExists = false;
                //循环判断图片的格式是否正确
                for (var i in array) {
                    if (fileContentType.toLowerCase() == array[i].toLowerCase()) {
                        //图片格式正确之后，根据浏览器的不同设置图片的大小
                        if (obj.files && obj.files[0]) {
                            //火狐下，直接设img属性 
                            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()方式获取，需要一下方式 
                            imgObjPreview.src = window.URL.createObjectURL(obj.files[0]);
                        }
                        else {
                            //IE下，使用滤镜 
                            obj.select();
                            var imgSrc = document.selection.createRange().text;
                            //必须设置初始大小 
                            localImagId.style.width = "200px";
                            localImagId.style.height = "150px";
                            //图片异常的捕捉，防止用户修改后缀来伪造图片 
                            try {
                                localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
                                localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
                            }
                            catch (e) {
                                $.messager.alert("您上传的图片格式不正确，请重新选择!");
                                return false;
                            }
                            imgObjPreview.style.display = 'none';
                            document.selection.empty();
                        }
                        isExists = true;
                        return true;
                    }
                }

                if (isExists == false) {
                    $.messager.alert("上传图片类型不正确!");
                    return false;
                }
                return false;
            }
        }

        //显示图片  
        function over(imgid, obj, imgbig) {
            //大图显示的最大尺寸  4比3的大小  400 300  
            maxwidth = 400;
            maxheight = 300;

            //显示  
            obj.style.display = "";
            imgbig.src = imgid.src;

            //1、宽和高都超过了，看谁超过的多，谁超的多就将谁设置为最大值，其余策略按照2、3  
            //2、如果宽超过了并且高没有超，设置宽为最大值  
            //3、如果宽没超过并且高超过了，设置高为最大值  

            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() {
            //先上传图片后，再提交  
            upLoadFile();
            var test = document.getElementById("test").value = "add";
            var tbName = document.getElementById("tbName").value;
            var idFile = document.getElementById("idFile").value;
            //先判断是否上传图片之后在提交
            $('#ff').form('submit', {
                url: "../../Handler/add.ashx?tbName=" + tbName + "&idFile=" + idFile + "&test=" + test,
                dataType: "json",
                onSubmit: function () {
                    if ($(this).form('validate'))
                        return true;
                    else {
                        return false;
                    }
                },
                success: function (data) {
                    var dataJson = $.parseJSON(data);
                    if (dataJson.success) {
                        $("#add_address").dialog('destroy');  //销毁dialog对象
                        $.messager.alert("提示", dataJson.msg)
                        $("#dateList").datagrid("reload").datagrid('clearSelections').datagrid('clearChecked');

                    } else {
                        $("#add_address").dialog('destroy');  //销毁dialog对象
                        $.messager.alert("提示", dataJson.msg)
                    }
                }
            });
        }


        //上传图片  
        function upLoadFile() {
            var idFile = document.getElementById("idFile").value;
            //判断是否选择图片  
            var options = {
                type: "POST",
                url: '../../Handler/InputImg.ashx'
                //success: showResponse  
            };
            // 将options传给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">
                链接名称：
            </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">
                链接logo：
            </th>
            <td class="style3">
                <div style="width: 307px; height: 22px;">
                    选择图片:<input id="idFile" style="width: 224px" runat="server" name="idFile" onchange="javascript:setImagePreview(this,localImag,preview);"
                        type="file" />
                </div>
                <%--预 览:
                <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()">
            上传</a> 
            <a href="Friendly.aspx" class="easyui-linkbutton">取消</a>
    </div>
    </form>
</body>

提交表单的一般处理程序：

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();//前台传的标示值  
            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\":\"添加失败，链接名称与已有的链接名称重复！\",\"success\":false}");
                return;
            }
            else
            {

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

                }
                catch
                {
                    context.Response.Write("{\"msg\":\"添加失败，请核对信息！\",\"success\":false}");
                    return;
                }
                try
                {
                    string img = context.Request.QueryString["idFile"].Trim();
                    if (img == "")
                    {
                        context.Response.Write("{\"msg\":\"添加失败，请核对图片信息！\",\"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\":\"添加失败，请核对信息！\",\"success\":false}");
                    return;
                }
            }
            if (frend.Add(fr) > 0)
            {
                context.Response.Write("{\"msg\":\"添加成功！\",\"success\":true}");
            }
            else
            {
                context.Response.Write("{\"msg\":\"添加失败，请核对信息！\",\"success\":false}");
            }
        }

原型图：

上传图片时，需要jquery.form.js的js文件，下载地址：http://download.csdn.net/detail/jiuqiyuliang/6919517

posted on 2016-06-28 16:01 小疯子li 阅读(2362) 评论(0) 编辑收藏举报