c#描述swfupload上传实例

/** * SWFUpload: http://www.swfupload.org, http://swfupload.googlecode.com * * mmSWFUpload 1.0: Flash upload dialog - http://profandesign.se/swfupload/, http://www.vinterwebb.se/ * * SWFUpload is (c) 2006-2007 Lars Huring, Olov Nilz�n and Mammon Media and is released under the MIT License: * http://www.opensource.org/licenses/mit-license.php * * SWFUpload 2 is (c) 2007-2008 Jake Roberts and is released under the MIT License: * http://www.opensource.org/licenses/mit-license.php * */ /* ******************* */ /* Constructor & Init */ /* ******************* */ var SWFUpload; if (SWFUpload == undefined) { SWFUpload = function (settings) { this.initSWFUpload(settings); }; } SWFUpload.prototype.initSWFUpload = function (settings) { try { this.customSettings = {}; // A container where developers can place their own settings associated with this instance. this.settings = settings; this.eventQueue = []; this.movieName = "SWFUpload_" + SWFUpload.movieCount++; this.movieElement = null; // Setup global control tracking SWFUpload.instances[this.movieName] = this; // Load the settings. Load the Flash movie. this.initSettings(); this.loadFlash(); this.displayDebugInfo(); } catch (ex) { delete SWFUpload.instances[this.movieName]; throw ex; } }; /* *************** */ /* Static Members */ /* *************** */ SWFUpload.instances = {}; SWFUpload.movieCount = 0; SWFUpload.version = "2.2.0 Beta 3"; SWFUpload.QUEUE_ERROR = { QUEUE_LIMIT_EXCEEDED : -100, FILE_EXCEEDS_SIZE_LIMIT : -110, ZERO_BYTE_FILE : -120, INVALID_FILETYPE : -130 }; SWFUpload.UPLOAD_ERROR = { HTTP_ERROR : -200, MISSING_UPLOAD_URL : -210, IO_ERROR : -220, SECURITY_ERROR : -230, UPLOAD_LIMIT_EXCEEDED : -240, UPLOAD_FAILED : -250, SPECIFIED_FILE_ID_NOT_FOUND : -260, FILE_VALIDATION_FAILED : -270, FILE_CANCELLED : -280, UPLOAD_STOPPED : -290 }; SWFUpload.FILE_STATUS = { QUEUED : -1, IN_PROGRESS : -2, ERROR : -3, COMPLETE : -4, CANCELLED : -5 }; SWFUpload.BUTTON_ACTION = { SELECT_FILE : -100, SELECT_FILES : -110, START_UPLOAD : -120 }; SWFUpload.CURSOR = { ARROW : -1, HAND : -2 }; SWFUpload.WINDOW_MODE = { WINDOW : "window", TRANSPARENT : "transparent", OPAQUE : "opaque" }; /* ******************** */ /* Instance Members */ /* ******************** */ // Private: initSettings ensures that all the // settings are set, getting a default value if one was not assigned. SWFUpload.prototype.initSettings = function () { this.ensureDefault = function (settingName, defaultValue) { this.settings[settingName] = (this.settings[settingName] == undefined) ? defaultValue : this.settings[settingName]; }; // Upload backend settings this.ensureDefault("upload_url", ""); this.ensureDefault("file_post_name", "Filedata"); this.ensureDefault("post_params", {}); this.ensureDefault("use_query_string", false); this.ensureDefault("requeue_on_error", false); this.ensureDefault("http_success", []); // File Settings this.ensureDefault("file_types", "*.*"); this.ensureDefault("file_types_description", "All Files"); this.ensureDefault("file_size_limit", 0); // Default zero means "unlimited" this.ensureDefault("file_upload_limit", 0); this.ensureDefault("file_queue_limit", 0); // Flash Settings this.ensureDefault("flash_url", "swfupload.swf"); this.ensureDefault("prevent_swf_caching", true); // Button Settings this.ensureDefault("button_image_url", ""); this.ensureDefault("button_width", 1); this.ensureDefault("button_height", 1); this.ensureDefault("button_text", ""); this.ensureDefault("button_text_style", "color: #000000; font-size: 16pt;"); this.ensureDefault("button_text_top_padding", 0); this.ensureDefault("button_text_left_padding", 0); this.ensureDefault("button_action", SWFUpload.BUTTON_ACTION.SELECT_FILES); this.ensureDefault("button_disabled", false); this.ensureDefault("button_placeholder_id", ""); this.ensureDefault("button_cursor", SWFUpload.CURSOR.ARROW); this.ensureDefault("button_window_mode", SWFUpload.WINDOW_MODE.WINDOW); // Debug Settings this.ensureDefault("debug", false); this.settings.debug_enabled = this.settings.debug; // Here to maintain v2 API // Event Handlers this.settings.return_upload_start_handler = this.returnUploadStart; this.ensureDefault("swfupload_loaded_handler", null); this.ensureDefault("file_dialog_start_handler", null); this.ensureDefault("file_queued_handler", null); this.ensureDefault("file_queue_error_handler", null); this.ensureDefault("file_dialog_complete_handler", null); this.ensureDefault("upload_start_handler", null); this.ensureDefault("upload_progress_handler", null); this.ensureDefault("upload_error_handler", null); this.ensureDefault("upload_success_handler", null); this.ensureDefault("upload_complete_handler", null); this.ensureDefault("debug_handler", this.debugMessage); this.ensureDefault("custom_settings", {}); // Other settings this.customSettings = this.settings.custom_settings; // Update the flash url if needed if (this.settings.prevent_swf_caching) { this.settings.flash_url = this.settings.flash_url;// + (this.settings.flash_url.indexOf("?") < 0 ? "?" : "&") + new Date().getTime(); } delete this.ensureDefault; }; SWFUpload.prototype.loadFlash = function () { if (this.settings.button_placeholder_id !== "") { this.replaceWithFlash(); } else { this.appendFlash(); } }; // Private: appendFlash gets the HTML tag for the Flash // It then appends the flash to the body SWFUpload.prototype.appendFlash = function () { var targetElement, container; // Make sure an element with the ID we are going to use doesn't already exist if (document.getElementById(this.movieName) !== null) { throw "ID " + this.movieName + " is already in use. The Flash Object could not be added"; } // Get the body tag where we will be adding the flash movie targetElement = document.getElementsByTagName("body")[0]; if (targetElement == undefined) { throw "Could not find the 'body' element."; } // Append the container and load the flash container = document.createElement("div"); container.style.width = "1px"; container.style.height = "1px"; container.style.overflow = "hidden"; targetElement.appendChild(container); container.innerHTML = this.getFlashHTML(); // Using innerHTML is non-standard but the only sensible way to dynamically add Flash in IE (and maybe other browsers) // Fix IE Flash/Form bug if (window[this.movieName] == undefined) { window[this.movieName] = this.getMovieElement(); } }; // Private: replaceWithFlash replaces the button_placeholder element with the flash movie. SWFUpload.prototype.replaceWithFlash = function () { var targetElement, tempParent; // Make sure an element with the ID we are going to use doesn't already exist if (document.getElementById(this.movieName) !== null) { throw "ID " + this.movieName + " is already in use. The Flash Object could not be added"; } // Get the element where we will be placing the flash movie targetElement = document.getElementById(this.settings.button_placeholder_id); if (targetElement == undefined) { throw "Could not find the placeholder element: " + this.settings.button_placeholder_id; } // Append the container and load the flash tempParent = document.createElement("div"); tempParent.innerHTML = this.getFlashHTML(); // Using innerHTML is non-standard but the only sensible way to dynamically add Flash in IE (and maybe other browsers) targetElement.parentNode.replaceChild(tempParent.firstChild, targetElement); // Fix IE Flash/Form bug if (window[this.movieName] == undefined) { window[this.movieName] = this.getMovieElement(); }