许多控件的 Keydown 处理程序 [英] Keydown Handler for Many Controls

问题描述

是否有更好的方法为繁忙表单上的许多控件设置一个 keydown 处理程序?(在某些情况下，单独使用表单处理程序不起作用.)

Is there a better way to have a keydown handler for many controls on a busy form? (Using the form handler alone doesn't work in some cases.)

Private Sub rText_KeyDown(ByVal Sender As Object, ByVal e As KeyEventArgs) Handles rText0.KeyDown, txTaxon.KeyDown, txCommon.KeyDown, _
  txConfidence.KeyDown, txDate.KeyDown, txDateAdded.KeyDown, txFileName.KeyDown, txGPS.KeyDown, txRating.KeyDown, _
  txConfidence.KeyDown, txQuality.KeyDown, txRemarks.KeyDown, txKeyWords.KeyDown, txOriginalPath.KeyDown, txDateAdded.KeyDown, _
  txLink.KeyDown, chkLink.KeyDown, rview.KeyDown, cmdNext.KeyDown, tvTaxon.KeyDown, Me.KeyDown, _
  cmdTaxon.KeyDown
Call globalkey(e)
End Sub

推荐答案

我是一名 C# 程序员，因此无法提供可行的解决方案(如在 vb.net 代码中).

I am a C# programmer, and hence wont be able to provide a working solutions (as in vb.net code).

我认为您可以通过执行以下操作来实现这一点.

I think that you can get this working by doing following things.

1. 编写一个AddHandlers 用于您各自的控件，当且仅当它们具有设置为属性的特定值(详细信息在下面的第 2 步中)
2. 您希望将公共处理程序附加到的所有控件，设置它们的Tag 属性为唯一值，例如:"KeyDown".在这种情况下，我建议使用 Enum 而不是 string
3. 现在，在您的 Form 构造函数中，在 InitializeComponent 调用之后，调用您在上面 #1 中编写的方法.这会将处理程序附加到所有所需的控件.
4. 如果您有多个具有此要求的表单，您可以将此功能添加到主表单中，该功能就像所有其他表单的父表单(继承)

1. Write up a method which AddHandlers for your respective controls, if and only if, they have specific value set to a property (details in step #2 below)
2. All controls, to which you want a common handler to be attached, set their Tag property to a unique value, for example : "KeyDown". I would recommend use of Enum though in this case, instead of string
3. Now, in your Form constructor, after InitializeComponent call, call the method you wrote in #1 above. This will attach handlers to all desired controls.
4. If you have multiple forms having this requirement, you can add this functionality to a main form, which acts like a parent for all others (inheritance)

希望我足够清楚，这会有所帮助.

Hope I am clear enough and this helps.

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