我想要创建一个安装在多个平台(Windows,Mac OS,Linux)上的Java应用程序,作为此安装的一部分,我希望注册一个URL协议处理程序,以便在单击链接时加载我的应用程序.
即我想要这样的东西:myprotocol://example.com
这样做有什么综合方式吗?或者某种框架推断不同操作系统的差异.
请考虑以下以下代码段:
template <class T>
using identity = T;
template <class T>
void foo(identity<T>&&) {}
int main()
{
int i{};
foo(i);
}
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i
是一个左值,因此如果foo
声明一个转发引用参数,它应该编译.但是,如果identity<T>&&
转为int&&
,则应该引发错误.
该代码在GCC 6.0.0(演示)中编译.
代码无法在Clang 3.7.0(演示)中编译,并显示错误消息:
error: no known conversion from 'int'
to 'identity<int> &&' (aka 'int &&') for 1st argument
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哪一个是对的?
我有这样的属性,它检查最小和最大字符串长度:
[StringLength(10, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 3)]
public string PropertyName {get; set;}
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基本上它是在默认的asp.net mvc 3.0模板中声明的方式(它们只有最大值100).
因此,如果字符串包含少于3个字符,则显示错误消息将是
"The PropertyName must be at least 3 characters long."
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所以在这种情况下我没有看到任何问题
但是如果字符串长度超过10,显示消息仍然是
"The PropertyName must be at least 3 characters long."
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所以现在变得不正确了
但是,如果我将消息模板更改为类似的东西:
[StringLength(10, ErrorMessage = "The {0} must be at least {2} characters long and maximum {1} characters long", MinimumLength = 3)]
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两种情况的错误消息都是这样的:
"The PropertyName must be at least 3 characters long and maximum 10 …
Run Code Online (Sandbox Code Playgroud) 如果没有任何差异,为什么有两个服务器参数来实现一个行为?
我想将表从SQL Server 2012导出到XML文件.我找到了很好的答案,在这里如何从SQL Server数据库查询中获取XML结果,但我仍然缺少如何将此结果物理保存到文件中.
SQL查询是:
SELECT [Created], [Text]
FROM [db304].[dbo].[SearchHistory]
FOR XML PATH('Record'), ROOT('SearchHistory')
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我使用Microsoft SQL Server Management Studio来执行此结果.我在结果窗口中看到了XML,但我无法保存它.
在上下文菜单中有"Save Result As ..",但是有98900行,我使用此选项耗尽了8GB内存.
有没有办法如何将此查询直接保存到磁盘上的XML文件?
我有大多数页面的默认布局_Layout.cshtml.但是对于某些页面组,我希望稍微修改一下默认布局.我知道我可以将该文件复制一下,但这意味着复制代码并维护两个布局,99%的代码相同.
我想继承默认的布局,如下所示:
LayoutInherited.cshtml:
Layout = "~/Views/Shared/_Layout.cshtml";
ViewBag.BodyContentClassSpecial = "";
@section header{
<style>
#body-content {
width: 90%;
margin: 0 auto;
}
</style>
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}
可以这样做吗?
两个命令都创建文件夹 我读到 MKDIR可以创建甚至子文件夹.
我通过Measurement协议将Winform应用程序中的事件发送到Universal Analytics,我使用fiddler来检查请求和响应.一切似乎都没问题,但Universal Analytics中没有任何事件.
我的应用请求:
POST http://www.google-analytics.com/collect HTTP/1.1
Host: www.google-analytics.com
Content-Length: 112
Expect: 100-continue
v=1
&tid=UA-44974825-1
&cid=1aba0888-732f-4690-9a91-d906c94a4a23
&t=exception
&exd=NullReferenceException
&exf=1
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服务器响应:
HTTP/1.1 200 OK
Pragma: no-cache
Expires: Mon, 07 Aug 1995 23:30:00 GMT
Cache-Control: private, no-cache, no-cache=Set-Cookie, proxy-revalidate
Access-Control-Allow-Origin: *
Last-Modified: Sun, 17 May 1998 03:00:00 GMT
X-Content-Type-Options: nosniff
Content-Type: image/gif
Date: Fri, 18 Oct 2013 13:54:39 GMT
Server: Golfe2
Content-Length: 35
Alternate-Protocol: 80:quic
GIF89a???????????,???????D?;
Run Code Online (Sandbox Code Playgroud) 我并排安装了Visual Studio 2013和2015.我刚刚将组合解决方案(C#,C++,C++/CLI)升级到2015,并将Platform Toolset设置为v140.
Visual Studio的构建工作正常,但无法从MSBuild编译.我使用无法找到v140的MSBuild 14和MSBuild抱怨,但这是无稽之谈,因为v140安装在"c:\ Program Files(x86)\ MSBuild\Microsoft.Cpp\v4.0\V140"中的计算机上.
关于升级解决方案的建议无法完成,因为解决方案已经升级,解决方案上下文菜单中没有此类项目.
如果我将项目的平台工具切换到v120,它可以工作.
细节:
c:\git\hewerMaster>"c:\Program Files (x86)\MSBuild\14.0\Bin\MSBuild.exe" c:\git
\hewerMaster\Hewer.sln /property:Configuration=Debug /property:Platform=x86
Microsoft (R) Build Engine version 14.0.23107.0
Copyright (C) Microsoft Corporation. All rights reserved.
Building the projects in this solution one at a time. To enable parallel build,
please add the "/m" switch.
Build started 9/12/2015 4:00:25 PM.
Project "c:\git\hewerMaster\Hewer.sln" on node 1 (default targets).
ValidateSolutionConfiguration:
Building solution configuration "Debug|x86".
ValidateProjects:
The project "HewerDotNetWrapper" is not selected for building in solution …
Run Code Online (Sandbox Code Playgroud) 基于这个问题,我决定签署从ASP.NET.MVC发送的电子邮件,以减少电子邮件的垃圾邮件分数,但我在某处有一些错误.
码:
public void SendEmail(MailMessage mailMessage)
{
string domain = "kup-nemovitost.cz";
var message = MimeMessage.CreateFromMailMessage(mailMessage);
HeaderId[] headers = new HeaderId[] { HeaderId.From, HeaderId.Subject, HeaderId.Date };
DkimCanonicalizationAlgorithm headerAlgorithm = DkimCanonicalizationAlgorithm.Relaxed;
DkimCanonicalizationAlgorithm bodyAlgorithm = DkimCanonicalizationAlgorithm.Relaxed;
string dkimPath = Path.Combine(ConfigHelper.GetDataPath(), "DKIM");
string privateKey = Path.Combine(dkimPath, "kup-nemovitost.cz.private.rsa");
DkimSigner signer = new DkimSigner(privateKey, domain, "mail")
{
SignatureAlgorithm = DkimSignatureAlgorithm.RsaSha1,
AgentOrUserIdentifier = "@" + domain,
QueryMethod = "dns/txt",
};
message.Prepare(EncodingConstraint.SevenBit);
message.Sign(signer, headers, headerAlgorithm, bodyAlgorithm);
using (var client = new MailKit.Net.Smtp.SmtpClient())
{
client.Connect("localhost", 25, false); …
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