Powershell无法找到类型[System.Windows.Forms.KeyEventHandler] [英] Powershell unable to find type [System.Windows.Forms.KeyEventHandler]

问题描述

这可能是一个非常简单的问题，但是我完全迷失了，寻找答案并没有帮助。

This might be a pretty simple question but I'm totally lost and searching for an answer hasn't been helpful.

我有一些powershell代码可以显示带有TextBoxes的简单GUI。一些文本框允许用户按Enter键运行Button_Click代码。当我尝试运行PS1脚本时，出现以下错误：

I've got some powershell code to display a simple GUI with TextBoxes. Some of the textboxes allows the user to press Enter to run Button_Click code. When I try running the PS1 script, I get errors saying the following:

Unable to find type [System.Windows.Forms.KeyEventHandler].
Make sure that the assembly that contains this type is loaded.At C:\Scripts\GUI-Testing.ps1:161 char:1

$TestVar=[System.Windows.Forms.KeyEventHandler]
CategoryInfo          : InvalidOperation: (System.Windows.Forms.KeyEventHandler:TypeName)
FullyQualifiedErrorId : TypeNotFound

奇怪的是，如果我关闭GUI然后重新运行脚本，我不会得到无法找到类型的错误，并且

The strange part, if I close the GUI then re-run the script, I don't get the Unable to find type error and pressing Enter works as desired.

认为我有一个答案，我尝试使用 [void] [reflection.assembly] :: Load（'System .Windows.Forms.KeyEventHandler'）会出现此错误使用 1参数调用 Load的异常：无法加载文件或程序集'System.Windows .Forms.KeyEventHandler或其依赖项之一。[FileNotFoundException]

Thinking I had an answer, I tried using [void][reflection.assembly]::Load('System.Windows.Forms.KeyEventHandler') which give this error Exception calling "Load" with "1" argument(s): "Could not load file or assembly 'System.Windows.Forms.KeyEventHandler' or one of its dependencies. [FileNotFoundException]

推荐答案

请确保已加载脚本顶部的以下程序集：

Make sure you load the following assemblies at the top of your script:

[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") 
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") 

如果仍然无法正常工作，则可以执行以下操作：

If it's still not working, you could do something like:

$objForm.KeyPreview = $True
$objForm.Add_KeyDown({
    if ($_.KeyCode -eq "Enter") 
    {    
        #Write Code Here
    }
})

这篇关于Powershell无法找到类型[System.Windows.Forms.KeyEventHandler]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！