小编mbh*_*n88的帖子

我需要找到用户是否单击浏览器后退按钮或刷新按钮.

当他点击后退或刷新按钮时,我需要将页面重定向到错误页面.这该怎么做.

我需要在我的ASP.net页面的javascript中执行此操作

我正在使用windows 7系统和python编程.我该如何安装boto库windows7？

我使用下面的代码来获取方法中的调用方法名称及其参数.

var stackTrace = new StackTrace();
var methodName = stackTrace.GetFrame(1).GetMethod().Name;
var parameters = stackTrace.GetFrame(1).GetMethod().GetParameters();

foreach (var parameterInfo in parameters)
{
    var name = parameterInfo.Name;
    var value = "How to get value?";
}

现在我的问题是获取该参数的值.有任何想法吗？

因此,对于过去24小时的查询我使用这样的东西

SELECT COUNT(*) AS cnt FROM `mytable` WHERE timestamp >= DATE_SUB(NOW(), INTERVAL 1 DAY)

where timestamp表是带有时间戳的表字段.

但我怎样才能得到2天前和昨天之间的间隔.所以

今天是24岁.我希望在22日(上午00:00)和23日(上午00:00)之间进行查询

我最近安装了vs2012,我已经更新了我的ClickOnce应用程序.更确切地说,我第一次打开我的C++ project(依赖于我的主要c#项目)我没有更新它,一切正常.VS 2012仍然能够看到Visual C++ 2010的先决条件.后来我通过将Platform Toolset更改为"Visual Studio 2012 (v110)"under 来更新了我的项目Properties->Configuration Properties->General.

与此同时,我已经安装了其他版本software,现在我发现我无法为我的ClickOnce发布项目添加Visual C++先决条件.该Visual C++ 2010 Runtime Libraries (x64)前提标有黄色三角形,它是缺失的.理想情况下我想更新Visual C++ 2012 Runtime Libraries x64 (and x86),但即使这个先决条件也缺失了.

我想这是因为在文件夹C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\Bootstrapper\Packages中相应的包(vcredist_x64)是空的.我也注意到,在控制面板中安装的程序列表中我已经Microsoft Visual C++ 2010 x64和x86安装,同时可再发行版本和运行时版本(我认为他们在那里与Visual Studio 2010以前安装的),而我错过了在Visual C++ 2012文件.因此,我认为Visual C++ 2012没有与Visual Studio 2012结合在一起,不是吗？我甚至尝试通过下载来安装Visual C++ 2012 Redistributable x64软件包,现在它们已经在我安装的程序中列出,只有Redistributable,而不是Runtime版本.

但是先决条件仍然缺失.我怎么解决这个问题？我甚至想过手动复制引导程序包为Visual C++ 2010位于... \v7.0A\Bootstrapper\Packages文件夹,并手动更改它的C++ 2012,但我不知道我应该写在product.xml下面<MsiProductCheck …

我使用下面的代码来施法时间为UTC这是工作

import java.text.SimpleDateFormat;
import static java.util.Calendar.* 

def dt = "2018-03-19T06:00:00+01:00"
def format = "yyyy-MM-dd'T'HH:mm:ssX"

TimeZone tz  = TimeZone.getDefault(); //getting up local time zone
TimeZone.setDefault(TimeZone.getTimeZone("UTC")); 
SimpleDateFormat sdf = new SimpleDateFormat(format);      
Date d = sdf.parse(dt);
TimeZone.setDefault(tz);

println d //output: 2018-03-19T05:00:00Z

println d.toTimestamp(); //Output: 2018-03-19 06:00:00.0

但是当我使用TimeZone.setTimeZone(TimeZone.getTimeZone("UTC"));它时它不起作用。

它只与 TimeZone.setDefault(TimeZone.getTimeZone("UTC"));

为什么这样？

评论后更新：输出需要在 CET 但在 UTC

def dt = "2018-03-19T06:00:00+01:00"
def format = "yyyy-MM-dd'T'HH:mm:ssX"
SimpleDateFormat sdf = new SimpleDateFormat(format);      
sdf.setTimeZone(TimeZone.getTimeZone("CET"))
Date d = sdf.parse(dt);

println d
println d.toTimestamp();

? 输出：

Mon …

要从mongo集合中查找一个项目,我正在尝试将过滤器应用于集合.但是有一个编译错误如下.

此代码取自官方mongodb文档

var filter = Builders<BsonDocument>.Filter.Eq("_id", id);
var result = _collection.Find(filter);

我正在使用MVC#.当我尝试将base64字符串转换为图像时,图像不会被打开.我从javascript获取base64字符串并将其转换为控制器中的图像.这是我的代码.

var base64 = "data:image/png;base64,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...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";

byte[] str = System.Text.Encoding.Unicode.GetBytes(base64);
var buffer = Convert.FromBase64String(Convert.ToBase64String(str));
var file = Server.MapPath("~/Content/images/err.png");
System.IO.File.WriteAllBytes(file, buffer);
Image img = new Image();
img.ImageUrl = Server.MapPath("~/Content/images/err.png");

是否有可能获得总表count和rows相同的查询.这样的事情

SELECT COUNT(1),*
FROM tbl
GROUP BY ALL

我使用以下方式使用 JDBC Prepared Statement 执行命名参数。有什么建议可以改善这一点吗？

import java.sql.*;

def sqlQuery = "select * from table where col1=:col1 and col2=:col2"
def namedParameters =[
  ['ColumnName':'col1','Value':'test', 'DataType': 'int'],
  ['ColumnName':'col2','Value':'testsdfdf', 'DataType':'string'],
];

PreparedStatement stmt;

namedParameters.eachWithIndex{ k, v -> 
println "Index: " + v
println "Name: " + k.ColumnName
println "Value: " + k.Value

//To replace named parameters with ?
sqlQuery  = sqlQuery .replace(":" + k.ColumnName, "?")
println sqlQuery 

println "DataType: " + k.DataType

switch(k.DataType.toLowerCase())
{
    case('int'):
    stmt.setInt(v+1, k.Value)
    break;

    case('string'):
    stmt.setString(v+1, k.Value)
    break;

    default:
    stmt.setObject(v+1, …

我使用下面的代码按字段名称过滤集合.但result.Current总是null存在而数据存在于MongoCollection.有任何想法吗？

码

public async Task<IdentityUser> FindByNameAsync(string userName)
        {
            if (string.IsNullOrEmpty(userName))
            {
                throw new ArgumentException("Null or empty argument: userName");
            }

            var filter = Builders<IdentityUser>.Filter.Eq("UserName", userName);
            var result = await _collection.FindAsync(filter);

            if (result != null && result.Current != null && result.Current.Count() == 1)
            {
                return result.Current.Single();
            }

            return null;
        }

Mongo文件

{
    "_id": {
        "$oid": "558acd1768869a0f6c45ab78"
    },
    "CreatedBy": 0,
    "UpdatedBy": 0,
    "CreatedTime": {
        "$date": "2015-06-24T15:30:28.336Z"
    },
    "UpdatedTime": {
        "$date": "0001-01-03T00:00:00.000Z"
    },
    "UserName": "test",
    "Email": null,
    "EmailConfirmed": …

是否可以使用纯ASP.NET和C#将Listitems从1 DropDownlist拖放到另一个DropDownlist而不使用javascript？

我创建了一个type=file输入元素

<input type="file" id="input-id" accept="image/jpg" onchange="verifyFileUpload(event)">

我需要检查文件分辨率是否aXb使用纯 Javascript。我怎样才能在verifyFileUpload(event)函数中做到这一点？