by kevin
8.
十月 2015 14:19
>
.net 4.0的环境下使用SmtpClient发送邮件，带有附件。碰到这个恶心的Exception System.FormatException: An invalid character was found in the mail header: 查了两天，终于解决了，是.Net自身的bug，据说后续版本是有解决的（估计.net 4.5以后）。 这里贴出解决方案： public static Attachment CreateAttachment(Stream attachmentFile, string displayName, string contentType, string attachmentFilePath)
{
var currentCulture = Thread.CurrentThread.CurrentCulture;//.net4.0 bug,
var attachment = new Attachment(attachmentFile, displayName);
try
{
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
attachment.ContentType = new ContentType(contentType);
attachment.ContentDisposition.CreationDate = File.GetCreationTime(attachmentFilePath);
attachment.ContentDisposition.ModificationDate = File.GetLastWriteTime(attachmentFilePath);
attachment.ContentDisposition.ReadDate = File.GetLastAccessTime(attachmentFilePath);
attachment.TransferEncoding = TransferEncoding.Base64;
attachment.NameEncoding = Encoding.UTF8;
string encodedAttachmentName = Convert.ToBase64String(Encoding.UTF8.GetBytes(displayName));
encodedAttachmentName = SplitEncodedAttachmentName(encodedAttachmentName);
attachment.Name = encodedAttachmentName;
}
finally
{
Thread.CurrentThread.CurrentCulture = currentCulture;
}
return attachment;
}
private static string SplitEncodedAttachmentName(string encoded)
{
const string encodingtoken = "=?UTF-8?B?";
const string softbreak = "?=";
const int maxChunkLength = 30;
int splitLength = maxChunkLength - encodingtoken.Length - (softbreak.Length * 2);
IEnumerable<string> parts = SplitByLength(encoded, splitLength);
string encodedAttachmentName = encodingtoken;
foreach (var part in parts)
{
encodedAttachmentName += part + softbreak + encodingtoken;
}
encodedAttachmentName = encodedAttachmentName.Remove(encodedAttachmentName.Length - encodingtoken.Length, encodingtoken.Length);
return encodedAttachmentName;
}
private static IEnumerable<string> SplitByLength(string stringToSplit, int length)
{
while (stringToSplit.Length > length)
{
yield return stringToSplit.Substring(0, length);
stringToSplit = stringToSplit.Substring(length);
}
if (stringToSplit.Length > 0)
{
yield return stringToSplit;
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
参考：https://support.microsoft.com/zh-cn/kb/2402064
by kevin
11.
十一月 2014 21:10
>
chown命令： 可以用来改变linux文件的所有者，用到这个，是因为交替使用ftp和winscp上传文件，而且使用了不同的用户，导致经常出现上传失败。 css的 line-height： 很多浏览器默认line-height的值是font-size的120%，也有是100%的，所有应该考虑reset一下。 php的日期比较： 过程化方法：date_diff 对象化方法：DateTimeObject->diff 这个没有.net那么舒服，有个TimeSpan，要获取相差多少天，多少秒的，真心麻烦。 直接上代码: 1: public static function datediff($dt_menor, $dt_maior, $str_interval, $relative=false) {
2: if (is_string($dt_menor))
3: $dt_menor = date_create($dt_menor);
4: if (is_string($dt_maior))
5: $dt_maior = date_create($dt_maior);
6:
7: $diff = date_diff($dt_menor, $dt_maior, !$relative);
8:
9: switch ($str_interval) {
10: case "y":
11: $total = $diff->y + $diff->m / 12 + $diff->d / 365.25;
12: break;
13: case "m":
14: $total = $diff->y * 12 + $diff->m + $diff->d / 30 + $diff->h / 24;
15: break;
16: case "d":
17: $total = $diff->y * 365.25 + $diff->m * 30 + $diff->d + $diff->h / 24 + $diff->i / 60;
18: break;
19: case "h":
20: $total = ($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h + $diff->i / 60;
21: break;
22: case "i":
23: $total = (($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i + $diff->s / 60;
24: break;
25: case "s":
26: $total = ((($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i) * 60 + $diff->s;
27: break;
28: }
29: if ($diff->invert)
30: return -1 * $total;
31: else
32: return $total;
33: }
by kevin
2.
九月 2014 23:15
>
css的float会将display为inline或者block的元素，修改成display:inline-block razor.parse 每次都会重新编译模板文件，这样做很耗资源（内存和CPU） Html.RenderPartial其实也是比较耗资源的 javascript，多个空格合并成一个： 1: string = string.replace(/\s{2,}/g, ' ');
asp.net mvc，使用 razor模板引擎，让方法返回的字符串不会被进行Html编码:
1: public static IHtmlString BeginScript(this HtmlHelper htmlHelper)
2: {
3: return new HtmlString("<script type=\"text/javascript\">");
4: }
5:
6: public static IHtmlString EndScript(this HtmlHelper htmlHelper)
7: {
8: return new HtmlString("</script>");
9: }
导出Excel中出现乱码的终极解决方案：
1: <meta http-equiv="content-type" content="application/ms-excel; charset=UTF-8"/>
2: <table>
3: <tr>
4: <td>cbcye@live.com | http://www.cbcye.com </td> …
5: </tr>
6: <table>
by kevin
15.
六月 2014 17:32
>
最近是累了点，懒了点。 一个div元素，点击，页面外的元素，隐藏此div。 1: $(document).mouseup(function (e)
2: {
3: var container = $("YOUR CONTAINER SELECTOR");
4:
5: if (!container.is(e.target) // if the target of the click isn't the container...
6: && container.has(e.target).length === 0) // ... nor a descendant of the container
7: {
8: container.hide();
9: }
10: });
jquery.bxslider 是一个很不错的插件。
目前的版本是4+，使用过程中，碰到了几个bug.
如果刚好slider正在切换[gotoprev,gotonext]的时候，进行重绘[redraw]，会造成slider停止工作。修复代码如下：
修改前：
1: el.redrawSlider = function () {
2: // resize all children in ratio to new screen size
3: slider.children.add(el.find('.bx-clone')).width(getSlideWidth());
4: // adjust the height
5: slider.viewport.css('height', getViewportHeight());
6: // update the slide position
7: if (!slider.settings.ticker) setSlidePosition();
8: // if active.last was true before the screen resize, we want
9: // to keep it last no matter what screen size we end on
10: if (slider.active.last) slider.active.index = getPagerQty() - 1;
11: // if the active index (page) no longer exists due to the resize, simply set the index as last
12: if (slider.active.index >= getPagerQty()) slider.active.last = true;
13: // if a pager is being displayed and a custom pager is not being used, update it
14: if (slider.settings.pager && !slider.settings.pagerCustom) {
15: populatePager();
16: updatePagerActive(slider.active.index);
17: }
18: }
修改后：
1: el.redrawSlider = function () {
2: if (slider.working) {
3: // Wait 'speed' amount of time before redrawing
4: setTimeout(function () { el.doRedrawSlider(); }, slider.settings.speed);
5: } else {
6: // Redraw immediately
7: el.doRedrawSlider();
8: }
9: };
10:
11: el.doRedrawSlider = function() {
12: // resize all children in ratio to new screen size
13: slider.children.add(el.find('.bx-clone')).width(getSlideWidth());
14: // adjust the height
15: slider.viewport.css('height', getViewportHeight());
16: // update the slide position
17: if (!slider.settings.ticker) setSlidePosition();
18: // if active.last was true before the screen resize, we want
19: // to keep it last no matter what screen size we end on
20: if (slider.active.last) slider.active.index = getPagerQty() - 1;
21: // if the active index (page) no longer exists due to the resize, simply set the index as last
22: if (slider.active.index >= getPagerQty()) slider.active.last = true;
23: // if a pager is being displayed and a custom pager is not being used, update it
24: if (slider.settings.pager && !slider.settings.pagerCustom) {
25: populatePager();
26: updatePagerActive(slider.active.index);
27: }
28: };
slider元素中，如果有img或者iframe无法正常加载，会引发slider无法正常工作。
修复前：
1: var loadElements = function (selector, callback) {
2: var total = selector.find('img, iframe').length;
3: if (total == 0) {
4: callback();
5: return;
6: }
7: var count = 0;
8: selector.find('img, iframe').each(function () {
9: $(this).one('load', function () {
10: if (++count == total) callback();
11: }).each(function () {
12: if (this.complete) $(this).load();
13: });
14: });
15: }
修复后：
1: var loadElements = function (selector, callback) {
2: var total = selector.find('img, iframe').length;
3: if (total == 0) {
4: callback();
5: return;
6: }
7: var count = 0;
8: selector.find('img, iframe').each(function () {
9: $(this).one('load', function () {
10: if (++count == total) callback();
11: }).one('error', function() {
12: if (++count == total) callback();
13: }).each(function () {
14: if (this.complete) $(this).load();
15: });
16: });
17: }
by kevin
17.
三月 2014 22:27
>
window.location.replace window.location.replace('url')，简单的防止后退到前一个页面。 fluentData的ParameterOut fluentData的ParameterOut方法有bug 如果output decimal的话，小数点的位置会被设置为0,所以改用 Currency ParameterOut("SubTotal", DataTypes.Currency)
by kevin
11.
三月 2014 14:52
>
关闭查询编辑器（SQL Query Editor）的查询结果窗口 快捷键是Ctrl+R 如果失效了，可以通过 Tools –> Options –> Environment –> Keyboard进行设置，如下图
by kevin
23.
二月 2014 15:38
>
查看DNS缓存 ipconfig /displaydns 清除DNS缓存 ipconfig /flushdns
by kevin
16.
十二月 2013 14:15
>
最近在改版65emall的时候，碰到一个很棘手的问题，Chrome浏览器有个最小字号设置，就是当字号小于最小字号时，就会自动调整为自动调整为最小的字号。如下图： 在中文版的Chrome中，默认的最小字号是12； 在英文版的Chrome中，默认的最小字号是10。 1: -webkit-text-size-adjust:none;
网上很多都建议使用上面这样的语法来实现，但在高版本的Chrome中，这个语法已经无效了。
所以使用 -webkit-transform:
代码如下：
1: .font-size8 { font-size: 8px;}
2: .font-size9 {font-size: 9px;}
3: .font-size10 {font-size: 10px;}
4: @media screen and (-webkit-min-device-pixel-ratio:0) {
5: .font-size8 {
6: font-size: 12px;
7: margin-top: 1px;
8: -webkit-transform: scale(0.83);
9: }
10: .font-size9 {
11: font-size: 12px;
12: margin-top: 2px;
13: -webkit-transform: scale(0.86);
14: }
15: .font-size10 {
16: font-size: 12px;
17: margin-top: 2px;
18: -webkit-transform: scale(0.92);
19: }
20: }
注意一下
为了能同时兼容中英文Chrome，10号，11号也要这样缩小
这个比例不是简单的等比例缩小，比如9号字，的缩放比例就不是0.75
另外需要注意的一点是，长度，高度，还是会按照10或者12号字来计算，所以，最好在外层在加个div作为容器。
1: <div>
2: <div class="font-size9">font-size:9px</div>
3: </div>
by kevin
8.
十一月 2013 13:40
>
做为一个非专业的Css编写人员，一不小心，就可以踩到坑。 觉得小于12号的字不利于阅读，所以google chrome小于12号的字，都会被修正为12号。 google了下，据说，随着浏览器版本的升级，处理的方案还不一样。 整体的代码如下： 1: * {
2: -webkit-text-size-adjust: none;
3: -webkit-transform-origin-x: 0;
4: -webkit-transform: scale(0.8333333333333334); /* 10/12=0.8333333333333334） */
5: }
by kevin
22.
十月 2013 13:58
>
要实现my cart那样的边框效果，很自然的想到 上面一个div， 下面一个div， 上面那个div的z-index比下面的这个大， 下面这个div往上移1px。 然后，悲剧就开始了。。。 总结了一下，基本上是以下几个坑： z-index 仅能在定位元素上奏效，就是要求该元素设置 position:xxxx，否则z-index无效。 如果元素内嵌于li，那么li需要设置 position:relative 上面的div需要设置background，否则无法遮住下面的div 主要代码如下: 1: <li style="position:relative" id="cart" >
2: <div style="width: 100px; height:23px; position: relative; z-index: 2; background-color: white; border: 1px solid #d3d3d3;"></div>
3: <div style="position: absolute; width: 100px; z-index: 1; top: 22px; background-color: white; border: 1px solid #d3d3d3; ">
4: </div>
5: </li>