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Program.cs
#region 名称解释
//Provider：提供程序名称
//HostName：服务器IP地址，可以用Location代替
//Database：数据库名称
//uid：用户名
//pwd：密码
//protocol：数据传输协议，默认为TCPIP，因此可以不对其进行设置
//port：端口号，如果db2数据库没有特殊设置，使用默认的端口就可以了，因此可以不进行设置。
//CurrentSchema：数据库连接实例
//Dsn:是你在本机ODBC数据源管理器【系统DSN】项里设置的系统数据源
2019-10-16
ajax 异步上传文件
jQuery.extend( {
createUploadIframe : function(id, uri) {
// create frame
var frameId = 'jUploadFrame' + id;
var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId
+ '" style="position:absolute; top:-9999px; left:-9999px"';
if (window.ActiveXObject) {
if (typeof uri == 'boolean') {
iframeHtml += ' src="' + 'javascript:false' + '"';
} else if (typeof uri == 'string') {
iframeHtml += ' src="' + uri + '"';
}
}
iframeHtml += ' />';
jQuery(iframeHtml).appendTo(document.body);
return jQuery('#' + frameId).get(0);
},
createUploadForm : function(id, fileElementId, data) {
// create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = jQuery('<form action="" method="POST" name="' + formId
+ '" id="' + formId
+ '" enctype="multipart/form-data"></form>');
if (data) {
for ( var i in data) {
jQuery(
'<input un="'+Math.random()+'" type="hidden" name="' + i + '" value="'
+ data[i] + '" />').appendTo(form);
}
}
var oldElement = jQuery('#' + fileElementId);
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).appendTo(form);
// jQuery(newElement).attr('id', "fileToUpload");
jQuery("#tempFileUploadInput")
.append(
'<input onchange="sendImageUploadChange()" type="file" id="fileToUpload" name="content_image" style="width:100%;height:100%;margin:0;cursor:pointer;font-size:100px;" un="' + fileId + '"/>');
// set attributes
jQuery(form).css('position', 'absolute');
jQuery(form).css('top', '-1200px');
jQuery(form).css('left', '-1200px');
jQuery(form).appendTo('body');
return form;
},
ajaxFileUpload : function(s) {
// TODO introduce global settings, allowing the client to modify
// them for all requests, not only timeout
s = jQuery.extend( {}, jQuery.ajaxSettings, s);
var id = new Date().getTime();
var form = jQuery.createUploadForm(id, s.fileElementId,
(typeof (s.data) == 'undefined' ? false : s.data));
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if (s.global && !jQuery.active++) {
jQuery.event.trigger("ajaxStart");
}
var requestDone = false;
// Create the request object
var xml = {}
if (s.global)
jQuery.event.trigger("ajaxSend", [ xml, s ]);
// Wait for a response to come back
var uploadCallback = function(isTimeout) {
var io = document.getElementById(frameId);
try {
if (io.contentWindow) {
xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML
: null;
xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument
: io.contentWindow.document;
} else if (io.contentDocument) {
xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML
: null;
xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument
: io.contentDocument.document;
}
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (xml || isTimeout == "timeout") {
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or
// notmodified
if (status != "error") {
// process the data (runs the xml through httpData
// regardless of callback)
// var data = jQuery.uploadHttpData( xml, s.dataType
// );
var tempText = xml.responseText;
var firstIndex = tempText.indexOf("{");
var lastIndex = tempText.indexOf("}");
var data = tempText.substring(firstIndex,
lastIndex + 1);
// If a local callback was specified, fire it and
// pass it the data
if (s.success)
s.success(data, status);
// Fire the global callback
if (s.global)
jQuery.event.trigger("ajaxSuccess", [ xml, s ]);
} else
jQuery.handleError(s, xml, status);
} catch (e) {
status = "error";
jQuery.handleError(s, xml, status, e);
}
// The request was completed
if (s.global)
jQuery.event.trigger("ajaxComplete", [ xml, s ]);
// Handle the global AJAX counter
if (s.global && !--jQuery.active)
jQuery.event.trigger("ajaxStop");
// Process result
if (s.complete)
s.complete(xml, status);
jQuery(io).unbind()
setTimeout( function() {
try {
jQuery(io).remove();
jQuery(form).remove();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
}, 100)
xml = null
}
}
// Timeout checker
if (s.timeout > 0) {
setTimeout( function() {
// Check to see if the request is still happening
if (!requestDone)
uploadCallback("timeout");
}, s.timeout);
}
try {
var form = jQuery('#' + formId);
//jQuery(form).attr('action', s.url);
jQuery(form).attr('action', s.url);
jQuery(form).attr('method', 'post');
jQuery(form).attr('target', frameId);
if (form.encoding) {
jQuery(form).attr('encoding', 'multipart/form-data');
} else {
jQuery(form).attr('enctype', 'multipart/form-data');
}
jQuery(form).submit();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
jQuery('#' + frameId).load(uploadCallback);
return {
abort : function() {
}
};
},
uploadHttpData : function(r, type) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if (type == "script")
jQuery.globalEval(data);
// Get the JavaScript object, if JSON is used.
if (type == "json")
eval("data = " + data);
// evaluate scripts within html
if (type == "html")
jQuery("<div>").html(data).evalScripts();
return data;
},
handleError : function(s, xhr, status, e) {
if (s.error) {
s.error.call(s.context || s, xhr, status, e);
}
// Fire the global callback
if (s.global) {
(s.context ? jQuery(s.context) : jQuery.event).trigger(
"ajaxError", [ xhr, s, e ]);
}
}
})
2013-04-04
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