如果在If-elseif语句中不起作用

我正在编写一个代码，要求用户标记他想要的某些文件，然后创建一个文件并对其进行相应的更改，现在就写信给你。如果在If-elseif语句中不起作用

问题是它只适用于if部分，而不适用于else if。我无法在网上找到答案。

这里是我的代码：

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

#This creates the path for the Json 
New-Item c:\users\$env:USERNAME\documents -ItemType directory -Name Json 

#creating the form 
$objForm = New-Object System.Windows.Forms.Form 
$objForm.Text = "Ofir`s script" 
$objForm.Size = New-Object System.Drawing.Size(270,200) 
$objForm.StartPosition = "CenterScreen" 

#creating the label 
$objLabel = New-Object System.Windows.Forms.Label 
$objLabel.Location = New-Object System.Drawing.Size(10,20) 
$objLabel.Size = New-Object System.Drawing.Size(280,20) 
$objLabel.Text = "Please check the relevant boxes:" 
$objForm.Controls.Add($objLabel) 

#This creates a checkbox called dsp.z 
$objDspCheckbox = New-Object System.Windows.Forms.Checkbox 
$objDspCheckbox.Location = New-Object System.Drawing.Size(10,40) 
$objDspCheckbox.Size = New-Object System.Drawing.Size(500,20) 
$objDspCheckbox.Text = "dsp.z" 
$objDspCheckbox.TabIndex = 0 
$objForm.Controls.Add($objDspCheckbox) 

#This creates a checkbox called fpga.bin 
$objFpgaCheckbox = New-Object System.Windows.Forms.Checkbox 
$objFpgaCheckbox.Location = New-Object System.Drawing.Size(10,60) 
$objFpgaCheckbox.Size = New-Object System.Drawing.Size(500,20) 
$objFpgaCheckbox.Text = "fpga.bin" 
$objFpgaCheckbox.TabIndex = 1 
$objForm.Controls.Add($objFpgaCheckbox) 

#This creates a checkbox called bootrom_uncmp.bin 
$objBootCheckbox = New-Object System.Windows.Forms.Checkbox 
$objBootCheckbox.Location = New-Object System.Drawing.Size(10,80) 
$objBootCheckbox.Size = New-Object System.Drawing.Size(500,20) 
$objBootCheckbox.Text = "bootrom_uncmp.bin" 
$objBootCheckbox.TabIndex = 2 
$objForm.Controls.Add($objBootCheckbox) 

#ok Button 
$OKButton = New-Object System.Windows.Forms.Button 
$OKButton.Location = New-Object System.Drawing.Size(40,120) 
$OKButton.Size = New-Object System.Drawing.Size(75,23) 
$OKButton.Text = "OK" 
$OKButton.Add_Click({if ($objDspCheckbox.Checked -eq $true) 
{ 
New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello" ;$objForm.close()} 
} 
) 

elseif ($objFpgaCheckbox.Checked -eq $true) 
{ 
New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello2" ;$objForm.close() 
} 

elseif ($objBootCheckbox.Checked -eq $true) 
{ 
New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello3" ;$objForm.close() 
} 

$objForm.Controls.Add($OKButton) 



#cancle Button 
$CancelButton = New-Object System.Windows.Forms.Button 
$CancelButton.Location = New-Object System.Drawing.Size(140,120) 
$CancelButton.Size = New-Object System.Drawing.Size(75,23) 
$CancelButton.Text = "Cancel" 
$CancelButton.Add_Click({$objForm.Close()}) 
$objForm.Controls.Add($CancelButton) 


#makes the form appear on top of the screen 
$objForm.Topmost = $True 

$objForm.Add_Shown({$objForm.Activate()}) 
[void] $objForm.ShowDialog()

来源

2016-12-04 ofribouba

检查它。你只关闭'if-loop'这里：'$ OKButton.Add_Click（{if ...}）' –

我不明白。我在if语句中只有“{”，所以这是我唯一需要关闭的地方..不是？正如我在网上看到的其他结构如果是“else if（condition）{action} – ofribouba

我的意思是''''应该在'else-if'之后？ –

这是工作现在用elseif。我做了一些改进，如果json文件夹已经存在，那么它会抛出错误。所以我在之前检查，如果该文件夹已经存在，那么不要创建或覆盖。使用相同的文件夹并在其下创建Json文件。如果该文件夹不存在，那么只创建它。

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

#This creates the path for the Json and also check if it is already there. 
If(!(Test-Path -Path C:\Users\$env:USERNAME\documents\Json)) 
{ 
New-Item c:\users\$env:USERNAME\documents -ItemType directory -Name Json 
} 
#creating the form 
$objForm = New-Object System.Windows.Forms.Form 
$objForm.Text = "Ofir`s script" 
$objForm.Size = New-Object System.Drawing.Size(270,200) 
$objForm.StartPosition = "CenterScreen" 

#creating the label 
$objLabel = New-Object System.Windows.Forms.Label 
$objLabel.Location = New-Object System.Drawing.Size(10,20) 
$objLabel.Size = New-Object System.Drawing.Size(280,20) 
$objLabel.Text = "Please check the relevant boxes:" 
$objForm.Controls.Add($objLabel) 

#This creates a checkbox called dsp.z 
$objDspCheckbox = New-Object System.Windows.Forms.Checkbox 
$objDspCheckbox.Location = New-Object System.Drawing.Size(10,40) 
$objDspCheckbox.Size = New-Object System.Drawing.Size(500,20) 
$objDspCheckbox.Text = "dsp.z" 
$objDspCheckbox.TabIndex = 0 
$objForm.Controls.Add($objDspCheckbox) 

#This creates a checkbox called fpga.bin 
$objFpgaCheckbox = New-Object System.Windows.Forms.Checkbox 
$objFpgaCheckbox.Location = New-Object System.Drawing.Size(10,60) 
$objFpgaCheckbox.Size = New-Object System.Drawing.Size(500,20) 
$objFpgaCheckbox.Text = "fpga.bin" 
$objFpgaCheckbox.TabIndex = 1 
$objForm.Controls.Add($objFpgaCheckbox) 

#This creates a checkbox called bootrom_uncmp.bin 
$objBootCheckbox = New-Object System.Windows.Forms.Checkbox 
$objBootCheckbox.Location = New-Object System.Drawing.Size(10,80) 
$objBootCheckbox.Size = New-Object System.Drawing.Size(500,20) 
$objBootCheckbox.Text = "bootrom_uncmp.bin" 
$objBootCheckbox.TabIndex = 2 
$objForm.Controls.Add($objBootCheckbox) 

#ok Button 
$OKButton = New-Object System.Windows.Forms.Button 
$OKButton.Location = New-Object System.Drawing.Size(40,120) 
$OKButton.Size = New-Object System.Drawing.Size(75,23) 
$OKButton.Text = "OK" 
$OKButton.Add_Click(
    { 
    if($objDspCheckbox.Checked -eq $true) 
     { 
      New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello" ;$objForm.close() 
     } 

    elseif($objFpgaCheckbox.Checked -eq $true) 
     { 
      New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello2" ;$objForm.close() 
     } 
    elseif($objBootCheckbox.Checked -eq $true) 
     { 
      New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello3" ;$objForm.close() 
     } 
    } 
    ) 


$objForm.Controls.Add($OKButton) 



#cancle Button 
$CancelButton = New-Object System.Windows.Forms.Button 
$CancelButton.Location = New-Object System.Drawing.Size(140,120) 
$CancelButton.Size = New-Object System.Drawing.Size(75,23) 
$CancelButton.Text = "Cancel" 
$CancelButton.Add_Click({$objForm.Close()}) 
$objForm.Controls.Add($CancelButton) 


#makes the form appear on top of the screen 
$objForm.Topmost = $True 

$objForm.Add_Shown({$objForm.Activate()}) 
[void] $objForm.ShowDialog()

来源

2016-12-04 14:33:12

多数民众赞成在伟大！感谢您的改进和帮助！ – ofribouba

@ofribouba。请接受答案if它可以帮助你。 –

你有一个花括号这一行：

New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello" ;$objForm.close()}

所以更改单击处理程序：

$OKButton.Add_Click(
{ 
    if ($objDspCheckbox.Checked -eq $true) 
    { 
     New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello" ;$objForm.close() 
    } 

    elseif ($objFpgaCheckbox.Checked -eq $true) 
    { 
     New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello2" ;$objForm.close() 
    } 

    elseif ($objBootCheckbox.Checked -eq $true) 
    { 
     New-Item c:\users\$env:USERNAME\documents\Json -itemtype file -name file.json -value "Hello3" ;$objForm.close() 
    } 
})

来源

2016-12-04 14:27:11

非常感谢！为我工作:) – ofribouba

如果在If-elseif语句中不起作用

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