如何在浏览器中同步ajax调用时显示等待消息？我尝试下面的代码,关闭Web服务器,但不显示"正在保存"消息.
一段时间后,只发生ajax调用的错误事件,没有任何进度消息.
如果同步ajax呼叫正在进行中,如何向用户显示等待消息？
var myInfo = '<div class="ui-state-highlight ui-corner-all" style="position: fixed;' +
'z-index: 10000; margin-top: 2%; margin-left: 2%">' +
' <br />' +
' <span class="ui-icon ui-icon-info" style="float: left; margin-right: .3em;"></span>' +
'<strong>Saving</strong> <br />' +
'<br /></div>'
$('#_info').html(myInfo);
$('#_info').show();
$.ajax( 'save',
{
async: false,
type: 'POST'
} );
添加工具栏按钮用于向jqgrid添加新行.添加显示的表单包含所有提交的项目空白.如何设置从发布添加命令时当前/选中的行的列值添加表单字段值？使用json远程数据.或者,如果这更简单,如何调用服务器方法传递当前/选定的行来检索从服务器添加表单的默认值？
jqgrid还包含隐藏的列.如果保存添加表单,则还应发送来自当前行的隐藏列的可能值以添加控制器.
更新
我尝试使用Oleg很好的建议
afterShowForm: function(formID) {
var selRowData,
rowid = grid.jqGrid('getGridParam', 'selrow');
if (rowid === null) {
// todo: how to cancel add command here
alert('Please select row');
return;
}
selRowData = grid.jqGrid('getRowData', rowid);
if (selRowData === null) {
alert('something unexpected happened');
return;
}
$('#' + 'Baas' + '.FormElement', formID).val(selRowData.Baas);
}
应用程序保存后保持添加表单.首先保存Baas字段为空.它看起来像afterShowForm事件只运行一次,而不是每次保存后.如何解决这个问题,以便可以在不关闭添加表单的情况下添加具有默认值的多行？如果没有选中的行,如何取消或不允许添加命令？
如何通过使用鼠标拖动面板页脚来更改面板高度.
我resize: vertical在下面的代码中尝试了样式,但它不允许拖动面板页脚.
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
<style>
.panel-resizable {
resize: vertical;
}
</style>
</head>
<body>
<div class="panel panel-default">
<div class="panel-body panel-resizable" style="height:80px">
</div>
<div class="panel-footer">Band1</div>
</div>
<div class="panel panel-default">
<div class="panel-body panel-resizable">
</div>
<div class="panel-footer">Band2</div>
</div>
</body>
</html>
Javascript代码
$(".designer-element").each(function () {
var $this = $(this),
var moot = $this.css(["color", "border-color", "background-color"]);
} );
用于获取元素颜色.这会将颜色返回为字符串
"background-color": "rgba(0, 0, 0, 0)"
"border-color": "rgb(211, 211, 211)"
"color": "rgb(51, 51, 51)"
如何从这些字符串中提取单个r,g和b值.不需要值.或者是否有一些更好的方法直接返回这些颜色值？
substrg不能使用,因为值的变量大小为1-3位可以使用一些正则表达式吗？
使用html5,jquery,jquery-ui和bootstrap.
我在.NET 3.5中尝试过以下代码,但mi为null.如何调用私有泛型方法以便在运行时传递类型参数？如果将SaveEntityGeneric标记为public,则此代码可以正常工作,但我不打算将其公开,因为它仅用于同一类中的其他方法,以使用GetType()传递此类类型.
using System.Reflection;
public class Main1
{
static void Main()
{
new Class1().Test();
}
}
class Class1
{
public void Test()
{
var mi = GetType().GetMethod("SaveEntityGeneric", BindingFlags.NonPublic);
// why mi is null ?
var gm = mi.MakeGenericMethod(GetType());
gm.Invoke(this, null);
}
void SaveEntityGeneric<TEntity>()
{
}
}
我把所有内容放在括号中,但下面的代码仍然在jslint中抛出错误:
Problem at line 5 character 104: The '&&' subexpression should be wrapped in parens.
if ((typeof (c1) === 'string') && (typeof (c2) === 'string') && (c1 !== n...
怎么修 ？
"use strict";
function t() {
var c1, c2;
if (((typeof (c1)) === 'string') && ((typeof (c2)) === 'string') && (c1 !== null) && (c2 !== null) && ((c1.trim()) === '') || ((c2.trim()) !== '')) {
return;
}
}
在PostgreSql 8.4中查询
explain analyze SELECT
max( kuupaev||kellaaeg ) as res
from ALGSA
where laonr=1 and kuupaev <='9999-12-31' and
kuupaev||kellaaeg <= '9999-12-3123 59'
需要3秒才能运行:
"Aggregate (cost=3164.49..3164.50 rows=1 width=10) (actual time=2714.269..2714.270 rows=1 loops=1)"
" -> Seq Scan on algsa (cost=0.00..3110.04 rows=21778 width=10) (actual time=0.105..1418.743 rows=70708 loops=1)"
" Filter: ((kuupaev <= '9999-12-31'::date) AND (laonr = 1::numeric) AND ((kuupaev || (kellaaeg)::text) <= '9999-12-3123 59'::text))"
"Total runtime: 2714.363 ms"
如何在PostgreSQL 8.4.4中加快速度？表结构如下.algsa表有关于kuupaev的索引也许这可以用吗？或者是否可以更改查询以添加其他索引以使其快速.表格中的列数不能更改.
CREATE TABLE firma1.algsa
(
id serial NOT NULL,
laonr numeric(2,0),
kuupaev date NOT NULL, …产品名称包含由空格分隔的单词.第一个字是品牌等的第二个字.
如何从字符串中提取这些单词,eq如何实现如下查询:
select
id,
getwordnum( prodname,1 ) as size,
getwordnum( prodname,2 ) as brand
from products
where ({0} is null or getwordnum( prodname,1 )={0} ) and
({1} is null or getwordnum( prodname,2 )={1} )
create table product ( id char(20) primary key, prodname char(100) );
如何在Postgres中创建getwordnum()函数或者是否应该在此查询中直接使用某些substring()或其他函数来提高速度？
如何在json结果中的ASP.NET MVC4 Web API v.1中将空字符串属性呈现为空字符串？WebAPI将它们呈现为
"myproperty": null
如何渲染这个
"myproperty": ""
控制器是
public class Customer {
public string myproperty { get; set; }
}
public class CustomersController : ApiController
{
public HttpResponseMessage Get()
{
var cust = new Customer();
return Request.CreateResponse(HttpStatusCode.OK,
new { customers = cust.ToArray() });
}
}
object是嵌套的,包含很多字符串属性.在构造函数中将它们全部设置为空字符串似乎很难看.API调用者需要空字符串或0表示小数,它不喜欢任何值中的null常量.
如何在ASP.NET MVC4 C＃应用程序的html页面中使用数据URL显示图像？
我在Chrome和Internet Explorer中尝试了以下代码，但出现空图像。borwser控制台窗口中没有错误。
从签名板返回图像URL https://github.com/szimek/signature_pad
有可能显示它还是应该在控制器中转换为png文件？
的HTML：
<!DOCTYPE html>
<html>
<body>
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAxcAAADVCAYAAAAl6A0eAAAcKElEQVR4Xu3da6x0V1kHcG6ltlRQlKKI8WAwxEgU0GirEY7GGCVGazQRhKRvo0aIRvATaFSKEuWD0fpBjJfEt15CPxitH0CDUY RD6IR8QKCQTlyaSViEKFoAanPX/eKq7sz58x5z5rzzuW3k5XZM7P3s9b 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