MVC3中 swfupload 按钮不显示 解决方案

这两天在做图片上传并显示的功能，之前就用过swfupload，觉得很不错，之前是用asp.net webform做的，这次的项目是用asp.net MVC3来做，视图引擎用的是Razor。

将js文件引入到项目中后发现，上传图片的按钮不显示，于是乎求助于搜索引擎，发现很多人都有这个问题。很多人给出的解决方案都是将flash_url的路径改为以@开头的。

我照做，结果还是不行，就这个问题磨蹭了很长时间。在不经意间发现了<%=Session.SessionID%>.是不是这个问题呢？

于是将这个改为@Session.SessionID，按钮可以显示了，我这个项目的问题就是出在不同的视图引擎，支持的语言不一样。

在Razor的视图引擎中，服务端代码不要出现<%%>.希望可以帮到大家。

 <script src="@Url.Content("~/Content/swfupload/swfupload.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Content/swfupload/handlers.js")" type="text/javascript"></script>
    <script type="text/javascript">
        var swfu;
        $(function () {
            swfu = new SWFUpload({
                //Backend Settings
                upload_url: "/Code/UploadNewsImg.ashx",
                post_params: {
                    "ASPSESSID": "@Session.SessionID"
                },

                // File Upload Settings
                file_size_limit: "2 MB",
                file_types: "*.jpg;*.gif;*.png",
                file_types_description: "JPG Images",
                file_upload_limit: "0",    // Zero means unlimited

                file_queue_error_handler: fileQueueError,
                file_dialog_complete_handler: fileDialogComplete,
                upload_progress_handler: uploadProgress,
                upload_error_handler: uploadError,
                upload_success_handler: function (file, serverData) {
                    var fields = serverData.split(":");
                    if (fields[0] == "ok") {
                        // Get the editor instance that we want to interact with.
                        $("#perimage").attr("src", fields[1]);
                        // Check the active editing mode.
                        //alert(fields[1]);
                    }
                    else if(fields[0]=="nook")
                    {
                        alert("图片必须小于50kb");
                    }
                    else if (fields[0] == "error") {//良好的编程素养！《一个程序员的自我修养》
                        alert("上传失败" + fields[1]);
                    }
                    else {
                        alert("未知的服务端返回");
                    }
                },
                upload_complete_handler: uploadComplete,

                // Button settings
                button_image_url: '@Url.Content("~/Content/swfupload/images/XPButtonNoText_160x22.png")',
                button_placeholder_id: "spanButtonPlaceholder",
                button_width: 160,
                button_height: 22,
                button_text: '<span class="button">选择图片<span class="buttonSmall">(2 MB Max)</span></span>',
                button_text_style: '.button { font-family: Helvetica, Arial, sans-serif; font-size: 14pt; } .buttonSmall { font-size: 10pt; }',
                button_text_top_padding: 1,
                button_text_left_padding: 5,

                //Flash Settings
                flash_url: '@Url.Content("~/Content/swfupload/swfupload.swf")', // Relative to this file
                flash9_url: '@Url.Content("~/Content/swfupload/swfupload_FP9.swf")', // Relative to this file


                custom_settings: {
                    upload_target: "divFileProgressContainer"
                },

                //Debug Settings
                debug: false
            });

        });
        function SF_DEL(){
            $.post("/Code/DelImg.ashx", { userid: $("#UserId").val() }, function (data) {
                if(data=="OK")
                {
                    $("#perimage").attr("src", "/Content/images/defaultPhoto.gif");
                }
            }, "text");
        }
    </script>