PowerShell学习笔记

1，ps7官方文档

2，使用脚本生成帮助文档

function Add-Node {
        param (
            $selectedNode,
            $name,
            $tag
        )
        $newNode = new-object System.Windows.Forms.TreeNode
        $newNode.Name = $name
        $newNode.Text = $name
        $newNode.Tag = $tag
        $selectedNode.Nodes.Add($newNode) | Out-Null
        return $newNode
} 

function Get-HelpTree {
    if ($script:cmdletNodes)
    {
          $treeview1.Nodes.remove($script:cmdletNodes)
        $form1.Refresh()
    }
    $script:cmdletNodes = New-Object System.Windows.Forms.TreeNode
    $script:cmdletNodes.text = "PowerShell Help"
    $script:cmdletNodes.Name = "PowerShell Help"
    $script:cmdletNodes.Tag = "root"
    $treeView1.Nodes.Add($script:cmdletNodes) | Out-Null 

    $treeView1.add_AfterSelect({
        if ($this.SelectedNode.Tag -eq "Cmdlet") {
            $helpText = Get-Help $this.SelectedNode.Name -Full
            $richTextBox1.Text = $helpText | Out-String
            $linkLabel1.Text = $helpText.relatedLinks.navigationLink[0].uri
            $form1.refresh()
        } else {
            $richTextBox1.Text = "Example to show how to use TreeView control in PowerShell script"
            $linkLabel1.Text = "http://www.ravichaganti.com/blog"
        }
    }) 

    #Generate Module nodes
    $modules = @("Microsoft.PowerShell.Core","Microsoft.PowerShell.Diagnostics","Microsoft.PowerShell.Host","Microsoft.PowerShell.Management","Microsoft.PowerShell.Security","Microsoft.PowerShell.Utility") 

    $modules | % {
        $parentNode = Add-Node $script:cmdletNodes $_ "Module"
        $moduleCmdlets = Get-Command -Module $_
        $moduleCmdlets | % {
            $childNode = Add-Node $parentNode $_.Name "Cmdlet"
        }
    }
    $script:cmdletNodes.Expand()
} 

#Generated Form Function
function GenerateForm {
########################################################################
# Code Generated By: SAPIEN Technologies PrimalForms (Community Edition) v1.0.7.0
# Generated On: 3/2/2010 5:46 PM
# Generated By: Ravikanth Chaganti (http://www.ravichaganti.com/blog)
######################################################################## 

#region Import the Assemblies
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
#endregion 

#region Generated Form Objects
$form1 = New-Object System.Windows.Forms.Form
$linkLabel1 = New-Object System.Windows.Forms.LinkLabel
$label4 = New-Object System.Windows.Forms.Label
$label3 = New-Object System.Windows.Forms.Label
$label2 = New-Object System.Windows.Forms.Label
$button1 = New-Object System.Windows.Forms.Button
$richTextBox1 = New-Object System.Windows.Forms.RichTextBox
$treeView1 = New-Object System.Windows.Forms.TreeView
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
#endregion Generated Form Objects 

#----------------------------------------------
#Generated Event Script Blocks
#----------------------------------------------
#Provide Custom Code for events specified in PrimalForms.
$button1_OnClick=
{
$form1.Close() 

} 

$OnLoadForm_StateCorrection=
{Get-HelpTree
} 

$linkLabel1_OpenLink=
{
    [system.Diagnostics.Process]::start($linkLabel1.text)
}
#----------------------------------------------
#region Generated Form Code
$form1.Text = "Primal Form"
$form1.Name = "form1"
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 838
$System_Drawing_Size.Height = 612
$form1.ClientSize = $System_Drawing_Size 

$linkLabel1.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",9,0,3,0)
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 539
$System_Drawing_Size.Height = 23
$linkLabel1.Size = $System_Drawing_Size
$linkLabel1.TabIndex = 10
$linkLabel1.Text = "http://www.ravichaganti.com/blog"
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 253
$System_Drawing_Point.Y = 541
$linkLabel1.Location = $System_Drawing_Point
$linkLabel1.TabStop = $True
$linkLabel1.DataBindings.DefaultDataSourceUpdateMode = 0
$linkLabel1.Name = "linkLabel1"
$linkLabel1.add_click($linkLabel1_OpenLink) 

$form1.Controls.Add($linkLabel1) 

$label4.TabIndex = 9
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 136
$System_Drawing_Size.Height = 23
$label4.Size = $System_Drawing_Size
$label4.Text = "Cmdlet Help URI"
$label4.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",9,1,3,0) 

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 253
$System_Drawing_Point.Y = 518
$label4.Location = $System_Drawing_Point
$label4.DataBindings.DefaultDataSourceUpdateMode = 0
$label4.Name = "label4" 

$form1.Controls.Add($label4) 

$label3.TabIndex = 6
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 100
$System_Drawing_Size.Height = 23
$label3.Size = $System_Drawing_Size
$label3.Text = "Description"
$label3.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",9,1,3,0) 

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 255
$System_Drawing_Point.Y = 37
$label3.Location = $System_Drawing_Point
$label3.DataBindings.DefaultDataSourceUpdateMode = 0
$label3.Name = "label3" 

$form1.Controls.Add($label3) 

$label2.TabIndex = 5
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 177
$System_Drawing_Size.Height = 23
$label2.Size = $System_Drawing_Size
$label2.Text = "PowerShell Help Tree"
$label2.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",9,1,3,0) 

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 13
$System_Drawing_Point.Y = 13
$label2.Location = $System_Drawing_Point
$label2.DataBindings.DefaultDataSourceUpdateMode = 0
$label2.Name = "label2" 

$form1.Controls.Add($label2) 

$button1.TabIndex = 4
$button1.Name = "button1"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 75
$System_Drawing_Size.Height = 23
$button1.Size = $System_Drawing_Size
$button1.UseVisualStyleBackColor = $True 

$button1.Text = "Close" 

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 253
$System_Drawing_Point.Y = 577
$button1.Location = $System_Drawing_Point
$button1.DataBindings.DefaultDataSourceUpdateMode = 0
$button1.add_Click($button1_OnClick) 

$form1.Controls.Add($button1) 

$richTextBox1.Name = "richTextBox1"
$richTextBox1.Text = ""
$richTextBox1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 255
$System_Drawing_Point.Y = 61
$richTextBox1.Location = $System_Drawing_Point
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 562
$System_Drawing_Size.Height = 454
$richTextBox1.Size = $System_Drawing_Size
$richTextBox1.TabIndex = 1 

$form1.Controls.Add($richTextBox1) 

$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 224
$System_Drawing_Size.Height = 563
$treeView1.Size = $System_Drawing_Size
$treeView1.Name = "treeView1"
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 13
$System_Drawing_Point.Y = 37
$treeView1.Location = $System_Drawing_Point
$treeView1.DataBindings.DefaultDataSourceUpdateMode = 0
$treeView1.TabIndex = 0 

$form1.Controls.Add($treeView1) 

#endregion Generated Form Code 

#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($OnLoadForm_StateCorrection)
#Show the Form
$form1.ShowDialog()| Out-Null 

} #End Function 

#Call the Function
GenerateForm

3，查看命令帮助：man get-filehash / get-help get-filehash

4，get-filehash

1, 获取文件MD5

get-filehash xxx.txt -Algorithm MD5

2, 获取字符串MD5： 需要自定义函数实现, 这里的函数有些问题，比如例子中得出的“123456”的MD5值和实际不同：实际：E10ADC3949BA59ABBE56E057F20F883E答案：E1ADC3949BA59ABBE56E057F2F883E少了2位，当然也不是全部的0都去掉了。原因是字节转换成字符串的时候没有保证是2位宽度造成的，待研究。

function Get-Hash{
param(
    [string] $string = $(throw 'string is required'),
     [ValidateSet("MD5", "SHA256")]
    [string] $algorithm
)

$utf8 = new-object -TypeName System.Text.UTF8Encoding
$hasher = [System.Security.Cryptography.HashAlgorithm]::create($algorithm)
$hash = $hasher.ComputeHash($utf8.GetBytes($string))

 -join ( $hash | foreach {"{0:X}" -f $_} )
}

Get-Hash '123456' -algorithm MD5
Get-Hash '123456' -algorithm SHA256

5,

6,