Question

这是一个小程序，它会在WPF Get-Childitem中显示GridView的结果。＆＃39;名称＆＃39;，＆＃39;长度＆＃39;，＆＃39; LastWriteTime＆＃39;和＆＃39;模式＆＃39;的列添加。

[void][System.Reflection.Assembly]::LoadWithPartialName('PresentationFramework')

$grid_view = New-Object -TypeName System.Windows.Controls.GridView

$property_names = 'Name', 'Length', 'LastWriteTime', 'Mode'

foreach ($elt in $property_names)
{
    $grid_view.Columns.Add((New-Object -TypeName System.Windows.Controls.GridViewColumn `
        -Property @{ 
            Header = $elt
            DisplayMemberBinding = New-Object System.Windows.Data.Binding -ArgumentList @(, $elt) 
        }))
}

$list_view = New-Object -TypeName System.Windows.Controls.ListView `
    -Property @{
        Name = 'abc'
        Margin = New-Object System.Windows.Thickness -ArgumentList @(, 10)
        View = $grid_view
    }

Get-ChildItem | ForEach-Object { $list_view.Items.Add($_) | Out-Null }

$grid = New-Object System.Windows.Controls.Grid

$grid.Children.Add($list_view) | Out-Null

$window = New-Object System.Windows.Window -Property @{ Content = $grid }

$window.ShowDialog() | Out-Null

这是生成的窗口：

请注意＆＃39;模式＆＃39;列是空的。

＆＃39;模式＆＃39;有什么特别之处？属性？那么，让我们仔细看看它：

PS C:\> Get-ChildItem C:\Windows\notepad.exe | Get-Member | Where-Object { $_.MemberType -match 'property' }


   TypeName: System.IO.FileInfo

Name              MemberType     Definition                                                    
----              ----------     ----------                                                    
Mode              CodeProperty   System.String Mode{get=Mode;}                                 
PSChildName       NoteProperty   System.String PSChildName=notepad.exe                         
PSDrive           NoteProperty   System.Management.Automation.PSDriveInfo PSDrive=C            
PSIsContainer     NoteProperty   System.Boolean PSIsContainer=False                            
PSParentPath      NoteProperty   System.String PSParentPath=Microsoft.PowerShell.Core\FileSy...
PSPath            NoteProperty   System.String PSPath=Microsoft.PowerShell.Core\FileSystem::...
PSProvider        NoteProperty   System.Management.Automation.ProviderInfo PSProvider=Micros...
Attributes        Property       System.IO.FileAttributes Attributes {get;set;}                
CreationTime      Property       datetime CreationTime {get;set;}                              
CreationTimeUtc   Property       datetime CreationTimeUtc {get;set;}                           
Directory         Property       System.IO.DirectoryInfo Directory {get;}                      
DirectoryName     Property       string DirectoryName {get;}                                   
Exists            Property       bool Exists {get;}                                            
Extension         Property       string Extension {get;}                                       
FullName          Property       string FullName {get;}                                        
IsReadOnly        Property       bool IsReadOnly {get;set;}                                    
LastAccessTime    Property       datetime LastAccessTime {get;set;}                            
LastAccessTimeUtc Property       datetime LastAccessTimeUtc {get;set;}                         
LastWriteTime     Property       datetime LastWriteTime {get;set;}                             
LastWriteTimeUtc  Property       datetime LastWriteTimeUtc {get;set;}                          
Length            Property       long Length {get;}                                            
Name              Property       string Name {get;}                                            
BaseName          ScriptProperty System.Object BaseName {get=if ($this.Extension.Length -gt ...
VersionInfo       ScriptProperty System.Object VersionInfo {get=[System.Diagnostics.FileVers...

我们可以看到Mode是CodeProperty，而正确显示的属性属于MemberType Property。

如果我们更改此行：

Get-ChildItem | ForEach-Object { $list_view.Items.Add($_) | Out-Null }

到这一行：

Get-ChildItem | select $property_names | ForEach-Object { $list_view.Items.Add($_) | Out-Null }

出现Mode列值！：

这里发生了什么？好吧，通过运行Get-ChildItem到Select-Object的输出并显式选择属性，MemberTypes将转换为NoteProperty类型：

PS C:\> Get-ChildItem C:\Windows\notepad.exe | select Name, Mode | Get-Member


   TypeName: Selected.System.IO.FileInfo

Name        MemberType   Definition                    
----        ----------   ----------                    
Equals      Method       bool Equals(System.Object obj)
GetHashCode Method       int GetHashCode()             
GetType     Method       type GetType()                
ToString    Method       string ToString()             
Mode        NoteProperty System.String Mode=-a---      
Name        NoteProperty System.String Name=notepad.exe

显然，CodeProperty属性在这种情况下似乎没有正确绑定。

当然，我希望将Get-Chiditem的结果直接存储在ListView而不是Selected变种中。

所以我的问题是，有没有办法在列中正确显示CodeProperty？

Answer 1

看起来DataGrid处理Mode属性就好了。

这是一个名为Out-DataGrid的函数，它使用DataGrid代替GridView和ListView：

[空隙] [System.Reflection.Assembly] :: LoadWithPartialName（＆＃39; PresentationFramework＆＃39）

函数Out-DataGrid（$ properties） {

$data_grid = New-Object -TypeName System.Windows.Controls.DataGrid

$data_grid.IsReadOnly = $true
$data_grid.AutoGenerateColumns = $false

foreach ($elt in $properties)
{
    $data_grid.Columns.Add((New-Object -TypeName System.Windows.Controls.DataGridTextColumn `
        -Property @{
            Header = $elt
            Binding = (New-Object System.Windows.Data.Binding -ArgumentList @(, $elt))  
        }))
}

$data_grid.ItemsSource = @($input)

$grid = New-Object System.Windows.Controls.Grid

$grid.Children.Add($data_grid) | Out-Null

$window = New-Object System.Windows.Window -Property @{ Content = $grid }

$window.ShowDialog() | Out-Null

$data_grid.SelectedItem

}

使用示例：

ls | Out-DataGrid -properties 'Name', 'Mode', 'Length'

GridView - 如何绑定CodeProperty

1 个答案: