问题列表 - 第2082页

我在使用时遇到问题LoadControl( type, Params ).让我解释...

我有一个超级简单的用户控件(ascx)

<%@ Control Language="C#" AutoEventWireup="True" Inherits="ErrorDisplay" Codebehind="ErrorDisplay.ascx.cs" EnableViewState="false" %>

<asp:Label runat="server" ID="lblTitle" />
<asp:Label runat="server" ID="lblDescription" />

代码(c#)背后:

public partial class ErrorDisplay : System.Web.UI.UserControl
{

    private Message _ErrorMessage;    

    public ErrorDisplay()
    {
    }

    public ErrorDisplay(Message ErrorMessage)
    {
        _ErrorMessage = ErrorMessage;
    }    

    protected override void OnPreRender(EventArgs e)
    {
        base.OnPreRender(e);

        if (_ErrorMessage != null)
        {
            lblTitle.Text = _ErrorMessage.Message;
            lblDescription.Text = _ErrorMessage.Description;
        }
    }
}

在我的Web应用程序的其他地方,我使用以下代码将usercontrol的实例添加到页面:

divValidationIssues.Controls.Add(LoadControl(typeof(ErrorDisplay), new object[] { MessageDetails }));   

我正在使用LoadControl的重载版本,因为我想将Message参数传递给构造函数.这一切看起来都可行.

但是,当在OnPreRender()ErrorDisplay用户控件上触发时,lblTitle和lblDescription变量都是 …

当你有一个派生类时,是否有一种更简单的方法从以下方法引用变量:

BaseClass::variable

编辑
正如它发生的那样,我找到了一个使用函数来解释这个问题的页面: Template-Derived-Classes Errors.显然,使用模板类时会有所不同.

我有这个代码

#include <iostream>

using namespace std;

int main(int argc,char **argv) {

    unsigned long long num1 = 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999995LL;
    unsigned long long num2 = 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999996LL;
    unsigned long long num3 = 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999997LL;
    unsigned long long num4 = 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999998LL;
    unsigned long long num5 = 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999LL;

    cout << (unsigned long long)(num1 * num2 * num3 * num4 * num5) << endl;
    return 0;
}

你可以看到数字是巨大的,但当我在那里做数学时我得到了这个:18446744073709551496

在编译时我得到这些警告:

warning: integer constant is too large for its type|
In function `int main(int, char**)':|
warning: this decimal constant is …

如果在部署应用程序后数据发生更改,您如何使数据库保持最新？

我的意思是,你可以添加或删除表,这是一个简单的任务.改变现有的表也很简单.但是如果你经常改变结构,你如何控制它呢？

我曾经在数据库中保留一个包含当前数据库版本的表.然后每次升级都是一个完成其工作的SQL文件 - 创建新表,添加列或移动数据.文件是以这些版本命名的 - 所以如果我的升级脚本获得了数据库版本10,它只是将11.sql中的所有文件都带到N.sql并同时应用它们中的每一个递增数据库版本号.

这似乎工作正常,但我想知道 - 你的策略是什么？
如果我在一个"补丁"中对一个表进行规范化,那么这个系统似乎并不完美,之后我再次将其归一化为无论什么原因.然后它完成了两次.

但是,每次我改变一些东西时写一个完整的升级脚本似乎很痛苦,容易出错.至少更多这样的原子变化.

此外,我可以预期不同的客户可以随时运行不同的数据库版本,所以我真的应该有办法从任何一点上升.

我在Visual Studio中遇到了一大堆链接器错误,我甚至没有直接调用这些方法.我白天是一名java开发人员,但我有一个我需要用C++做的项目,打算在Windows机器上运行.因此,我在使用Visual Studio时陷入困境.

基本上,我有一个os项目,我添加了一个访问器方法.我将该项目编译为.lib文件(编译和链接正常).

然后我有自己的项目使用该lib.我在Project-> Properties - > Linker - > Input下包含了库,并在General - > Additional Lib Directories中设置了相应的目录.我已经在相应的文件中包含了标题,我只是调用其中一个类的构造函数...甚至没有调用我创建的方法.

代码编译,但我得到以下大量的链接器错误 - 主要是LNK2019和LNK2001错误.我尝试在不同的设置(lib,exe等)下重新编译,并且链接器错误似乎只是相乘.当我切换回之前的设置时,错误的数量仍保持在最高点.任何想法如何解决这一问题？

构建日志

Build build:Project:SpamCapture,Configuration:Debug | Win32

命令行:

创建临时文件"c:\ SpamCapture\SpamCapture\SpamCapture\Debug\RSP0000103081740.rsp",内容为[/ VERBOSE:LIB /OUT:"C:\SpamCapture\SpamCapture\SpamCapture\Debug\SpamCapture.exe"/ INCREMENTAL/LIBPATH: "C:\ SpamCapture\Config\Debug \"/ MANIFEST /MANIFESTFILE:"Debug\SpamCapture.exe.intermediate.manifest"/NODEFAULTLIB:"libcmtd.lib"/NODEFAULTLIB:"nafxcwd.lib"/ DEBUG/PDB:"c :\ SpamCapture\SpamCapture\SpamCapture\Debug\SpamCapture.pdb"/ SUBSYSTEM:CONSOLE/MACHINE:X86 KeyCapture_Config.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32 .lib uuid.lib odbc32.lib odbccp32.lib

"\调试\ Interaction.obj"

"\调试\ InteractionSet.obj"

"\调试\ LogReader.obj"

"\调试\ SpamCapture.obj"

"\调试\ StdAfx.obj的"

"\调试\ SpamCapture.res"

".\ Debug\SpamCapture.exe.embed.manifest.res"]创建命令行"link.exe @c:\ SpamCapture\SpamCapture\SpamCapture\Debug\RSP0000103081740.rsp/NOLOGO/ERRORREPORT:PROMPT"

输出窗口:

链接...链接:警告LNK4067:模糊的切入点; 选择'mainCRTStartup'搜索库搜索C:\ SpamCapture\Config\Debug\KeyCapture_Config.lib:搜索C:\ Program Files\Microsoft Visual Studio 8\VC\lib\kernel32.lib:搜索C:\ Program …

我正在寻找一个可以处理RDF和OWL数据的库.

到目前为止,我发现:

• semweb(我所知道的没有猫头鹰支持)
• rowlex(更多'浏览器'应用程序)

你的建议:

• LinqToRdf(非常有趣,谢谢!)

好奇,有多少人在VMware环境下开发？

雇主为每个人设置vmware是否受欢迎？

似乎是推出新台式计算机和执行备份等的好方法.

只是担心性能(PC vmwares).

更新

我只是在看vmware的网站,销售额为13亿!哇!

我正在开发一个小应用程序,我可以生成一个条形码列表.我的计算机上安装了正确的字体.现在我将它们直接打印到网页上,它可以在Chrome和IE 7中正常运行,但不适用于Firefox.有谁知道Firefox与IE和Chrome有什么不同？

这是我的代码:

<html>
    <head>
        <title>Barcode Font Test</title>

        <style type="text/css" media="screen">
            .barcode { font-family: "wasp 39 m", verdana, calibri; font-size: 36pt; }
        </style>
    </head>

    <body>
        <div class="barcode">*574656*</div>
    </body>
</html>

编辑: 我可能应该提到,这更像是一个个人项目,并不打算发布到世界各地.虽然我会采取一个有效的解决方案,但我想要一些不涉及Javascript/Flash /等的东西.

我的公司正在使用Python作为一个相对简单的嵌入式项目.是否有其他人在嵌入式平台上使用Python？总的来说,它对我们很有用,可以快速开发应用程序,快速调试.我喜欢这种语言的整体"简洁".

我在日常工作中唯一真正的问题是缺少静态检查和常规编译器会导致在运行时抛出问题,例如字符串的简单意外cat和print语句中的int可以带来整个申请下来.

有没有办法从最后插入的行中获取值？

我正在插入一个PK将自动增加的行,我想得到这个PK.只有PK才能保证在表中是唯一的.

我正在使用Java和JDBC和PostgreSQL.