问题列表 - 第35788页

我有一个HABTM关系,当我使用以下代码时.Multiple Select的大小非常长.我想知道如何减小尺寸.

<label for="checkbox">Cuisines:</label>
        <?php echo $this->Form->input('Cuisine', array('label' => false, 'div'=> false, 'class' => 'short')); ?>

我没有找到任何减少这个尺寸的选择.我应该只使用CSS吗？

我遇到了上述问题很多的问题.我们有一个TCP/IP服务器应用程序,已经运行了好几年.我现在需要允许应用程序接受来自直接连接的USB设备的连接,通过内部使用套接字连接来修补服务器应用程序中的localhost(127.0.0.1).(顺便说一句,我只提到USB来解释我为什么这样做 - 我禁用所有USB功能作为调试此问题的一部分).

沿此套接字的通信可导致在客户端和服务器端调用GUI元素.访问客户端上的GUI元素会导致标题中的错误(下面的调用堆栈).这里的一个关键问题是调试器无法暂停异常:尽管在抛出时将所有异常设置为暂停,但应用程序只是在发生错误时终止.

我的应用程序唯一看起来独一无二的是它使用内部套接字连接到127.0.0.1.我还确认,如果将客户端分成单独的应用程序,该应用程序可以正常工作.但是,出于其他原因,我无法将其用作永久解决方案.

有几篇帖子讨论了我在下面列出的这类问题.不幸的是,在我的案例中似乎没有提供解决方案:

• 大多数相关帖子讨论了通过使用Invoke或BeginInvoke确保在GUI线程上执行所有GUI操作的需要.我相信我的应用程序正确执行此操作(它使用Application.Forms获取表单以获取主窗体并在此调用Invoke)并在调试器中进行了双重检查.
• 关于上面的内容,有一些关于使用Invoke vs BeginInvoke来阻止/不阻止的讨论.在我的情况下,两者都有相同的结果.
• 一些帖子建议有必要在GUI线程上自己创建套接字(我的).
• 这个解释说,如果在应用程序中使用DoEvents,则可以得到错误(我没有).
• 这也意味着当使用异步调用进行客户端套接字连接时(我的客户端连接是同步的),您可能会在缺少EndConnect调用时收到错误.
• 这个解释说,如果尚未创建窗口句柄,则可以从InvokeRequired获取不正确的结果(已使用IsHandleCreated进行了检查).
• 微软连接上的这个报告了一个类似的声音错误,但没有解决方案(微软自2006年以来一直在'调查'它!)
• 这个包含一个建议,使用AsyncOperationManager.SynchronizationContext来备份/恢复同步上下文,这(不出所料？)只会导致不同的错误.
• 有几篇帖子暗示错误只是调试,以下内容会让它消失 - 但我没有费心去尝试:
  System.Windows.Forms.Form.CheckForIllegalCrossThreadCalls = false

还有其他帖子提出类似的问题:这里,这里和这里.这里也是一个好人.

这是一个代码片段 - 当客户端收到套接字数据时,这会导致ProcessCommandCT内的崩溃:

' Find application main form from any thread
' There is only one instance of 'RibbonForm1' and this is the main form
Public Function GetRibbonForm() As RibbonForm1
    Dim rf As RibbonForm1 = Nothing
    For Each f As Form In My.Application.OpenForms
        rf …

我对VB.Net和语法不太新,但我不是专家.我正在用VB重写一些以前在C#中的东西,当我这样做的时候,我遇到了一个"困境".我可以有一个ReadOnly属性:

Public ReadOnly Property MaximumIndenture()
    Get
        Try
            'If the connection is closed, open it.'
            If _dbConnection.State = ConnectionState.Closed Then
                _dbConnection.Open()
            End If

            Dim dictFigureIndenture As Dictionary(Of String, Integer) = New Dictionary(Of String, Integer)
            Using dbReader As IDataReader = ExecuteReader("SELECT PART_FIGURE, MAX(PART_INDENTURE) AS 'MAX_INDENT' FROM PARTS GROUP BY PART_FIGURE")
                While dbReader.Read()
                    dictFigureIndenture.Add(dbReader("PART_FIGURE").ToString(), Convert.ToInt32(dbReader("MAX_INDENT").ToString()))
                End While
            End Using

            'If the connection is open, do what you need to and/or close it.'
            If _dbConnection.State = ConnectionState.Open Then
                _dbConnection.Close()
            End If

            Return dictFigureIndenture
        Catch …

我需要将二进制补码格式的字节转换为正整数字节.范围-128到127映射到0到25​​5.

Examples: -128 (10000000) -> 0 , 127 (01111111) -> 255, etc.

编辑为了消除混淆,输入字节(当然)是0到255范围内的无符号整数.但它表示使用二进制补码格式在-128到127范围内的有符号整数.例如,输入字节值128(二进制10000000)实际上表示-128.

EXTRA EDIT Alrighty,假设我们有以下字节流0,255,254,1,127.在二进制补码格式中,它表示0,-1,-2,1,127.这需要钳位到0到25​​5范围.有关更多信息,请查看这篇难以找到的文章:两个补充

通常你去网站,右键单击,你可以选择查看源代码.或者您只需使用firebug并选择要分析的元素.是否可以在URL中编写源代码,以便右键单击+选择或选择元素不会显示它？

我问,因为我已经通过在safari中使用iphone模拟器看过一次这种现象.

我正在寻找什么想法或提示？你的帮助会很棒.

编辑:基于错误的信息.您可以通过右键单击来查看源代码.但该网址仍包含有关该网站的所有信息.一旦我得到更多信息,我就会尽快回复你.抱歉所有的困惑.

编辑:这是包含有关网站信息的网址中的代码.

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我在PHP中使用由HTML代码分隔的条件语句时遇到了一些问题.这是我正在尝试编写的代码类型.这是一个配置文件页面,它只应由其配置文件的用户看到(我正在使用会话变量进行检查):

<?php if(check if user is logged in) ?>
<display users profile in html>
<?php else ?>
<display an error>

但这不起作用.我也尝试使用简写符号,:在结尾if使用endif语句,但它没有用.(在早期的项目中,该:方法有效foreach,endforeach所以我想我会尝试一下)

有任何想法吗 ？

Vista和Windows 7中的文件系统资源管理器窗口在窗口顶部有一个栏,您可以在其中键入要查看的地址.当您离开该字段时,它将从文本编辑字段变为具有按钮和可用于导航的下拉菜单的字段.

有这样的现有组件吗？如何构建这种类型的组件？

我正在考虑如何编写应用程序以在Windows 7 Phone和IPhone上工作,一种选择是使用MonoTouch并使用MVVM构建应用程序,然后只需要平台之间的视图不同.

但MonoTouch似乎不支持数据绑定.

当(如果)数据绑定支持添加到MonoTouch时,请提供这些问题的答案,我将更改例外答案.

另请参见iOS是否有可用的数据绑定机制？

我对如何使用ELMAH以编程方式记录的错误添加消息感到困惑.

例如:

public ActionResult DoSomething(int id)
{
    try { ... }

    catch (Exception e)
    {
        // I want to include the 'id' param value here, and maybe some
        // other stuff, but how?
        ErrorSignal.FromCurrentContext().Raise(e);
    }
}

看来Elmah所能做的就是记录原始异常,我怎样才能记录自己的调试信息？

我想用c#在标签中显示新行,但它并不适用于所有浏览器.

我想在浏览器中以xml格式显示.

我的代码如下

lblSaleData.Text =""+"\n"+""+ eml +""+"";