[英]passing powershell variables to C# code within PS script
I read a lot about passing vars from C# to powershell script but i am interesten in the other way around.我阅读了很多关于将变量从 C# 传递到 powershell 脚本的内容,但我对其他方式感兴趣。
here I have this code to create a Type in my powershell script:在这里,我有这段代码可以在我的 powershell 脚本中创建一个类型:
Add-Type @'
public class Node
{
public string Type;
public string VM_Name;
public string VM_IP;
public string Hostname;
}
'@
$vm1 = New-Object Node
$vm2 = New-Object Node
$vm3 = New-Object Node
$vm4 = New-Object Node
After this code I have C# code:在这段代码之后,我有 C# 代码:
$sourceCode = @'
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void InitializeComponent()
{
}
}
'@
How I might be able to access $vm1,2,3,4 in the C# code above ?我如何才能在上面的 C# 代码中访问 $vm1,2,3,4 ?
You could either pass the variables into the type via a method in your C# class that would accept the variables as parameters eg:您可以通过 C# 类中的方法将变量传递到类型中,该方法将接受变量作为参数,例如:
$form = new-object Form1
$form.SetVariables($vm1, $vm2, $vm3, $vm4)
I recommend that approach.我推荐这种方法。
Another option (heavier weight and not tested) is to try accessing the current runspace from the C# code eg:另一种选择(较重且未经测试)是尝试从 C# 代码访问当前运行空间,例如:
var defRunspace = System.Management.Automation.Runspaces.Runspace.DefaultRunspace;
var pipeline = defRunspace.CreateNestedPipeline();
pipeline.Commands.AddScript("$vm1,$vm2,$vm3,$vm4");
var results = pipeline.Invoke();
var vm1 = results[0];
var vm2 = results[1];
...
I haven't tried this from C# code (only from within PowerShell) so I'm not 100% sure it will work.我还没有从 C# 代码(仅在 PowerShell 中)尝试过这个,所以我不能 100% 确定它会起作用。
A way to pass variables to C# scripts running inside Powershell is to use an HttpListener (monitoring a localhost port) that harvests the Content-Type.将变量传递给在 Powershell 内运行的 C# 脚本的一种方法是使用 HttpListener(监视本地主机端口)来收集内容类型。 The Content-Type field can take up to 16,000 characters, and I used it to prevent colleagues on your machine using a browser to create spurious input.
Content-Type 字段最多可以包含 16,000 个字符,我用它来防止您机器上的同事使用浏览器创建虚假输入。
The listener shown here is in a stand-alone Powershell script:此处显示的侦听器位于独立的 Powershell 脚本中:
Add-Type -TypeDefinition @'
using System;
using System.Threading.Tasks;
using System.Net;
using System.Windows.Forms;
namespace LocalHostListener
{
public class Program
{
HttpListener listener = new HttpListener();
public static void Main(string[] args)
{
Program program = new Program();
program.Start(args[0]);
}
public void Start(string url_)
{
listener.Prefixes.Add(url_);
listener.Start();
listener.BeginGetContext(new AsyncCallback(GetContextCallback), null);
Console.ReadLine();
listener.Stop();
}
public void GetContextCallback(IAsyncResult result)
{
HttpListenerContext context = listener.EndGetContext(result);
HttpListenerRequest request = context.Request;
HttpListenerResponse response = context.Response;
Task.Factory.StartNew(() =>
{
// KICK OFF YOUR UPDATE ACTIONS HERE (THE LENGTH FILTER EXCLUDES BROWSER CALLS)
if(request.ContentType.Length>0) yourAction(request.ContentType);
});
// SEND A RESPONSE TO KEEP POWERSHELL Invoke-WebRequest,
// BROWSERS AND VBS MSXML2.XMLHTTP.6.0 HAPPY
// (C# HttpWebRequest DOESN'T CARE)
response.ContentLength64 = 1;
response.OutputStream.WriteByte(Convert.ToByte('!'));
listener.BeginGetContext(new AsyncCallback(GetContextCallback), null);
}
public void yourAction(string update)
{
Console.WriteLine(update);
MessageBox.Show(new Form(), update,"Message from localhost feed",
MessageBoxButtons.OK,MessageBoxIcon.None,
MessageBoxDefaultButton.Button1,(MessageBoxOptions)0x40000);
}
}
}
'@ -Language CSharp -ReferencedAssemblies System.Windows.Forms
$Host.UI.RawUI.WindowTitle='Monitoring "Content-Type" on http://localhost:1959'
[LocalHostListener.Program]::Main('http://localhost:1959/')
You can then update the listener using the Powershell WebRequest:然后,您可以使用 Powershell WebRequest 更新侦听器:
Invoke-WebRequest -ContentType 'Your message here' -URI http://localhost:1959
Updates can also be sent to the listener using a C# sender that sets the Content-Type with your variables (again, shown here in a stand-alone Powershell script):还可以使用 C# 发送器将更新发送到侦听器,该发送器使用您的变量设置 Content-Type(同样,此处显示为独立 Powershell 脚本):
Add-Type -TypeDefinition @'
using System;
using System.Net;
namespace LocalHostSender
{
public class Program
{
public static void Main(string[] args)
{
try{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:1959");
request.ContentType = args[0];
request.Timeout = 200;
request.GetResponse();
}catch{}
}
}
}
'@ -Language CSharp -ReferencedAssemblies System.Net
[LocalHostSender.Program]::Main("Your message here")
The response section of the listener script can be removed if only the C# sender is used.如果仅使用 C# 发送器,则可以删除侦听器脚本的响应部分。
Another advantage with this method is that VBS scripts can also update the Content-Type:这种方法的另一个优点是 VBS 脚本还可以更新 Content-Type:
text_ = "Your message here"
Randomize
Set req = CreateObject("MSXML2.XMLHTTP.6.0")
req.open "GET", "http://localhost:1959/" & rnd, False
req.setRequestHeader "Content-Type", text_
req.send
'req.responseText
The random addition to the page request is required if you want to loop multiple requests, as MSXML2.XMLHTTP.6.0 doesn't send Content-Type information on identical page requests.如果您想循环多个请求,则需要对页面请求进行随机添加,因为 MSXML2.XMLHTTP.6.0 不会在相同的页面请求上发送 Content-Type 信息。
If you actually wanted browser/HTML access you could harvest the page requests in the listener using:如果您确实想要浏览器/HTML 访问,您可以使用以下方法在侦听器中收集页面请求:
string simplePageRequest_ = request.Url;
//Parsing "favicon.ico" and "http://localhost:1959/"
string pageQuery_ = request.QueryString["q"];
updating via the browser page requests, or again using the Powershell WebRequest:通过浏览器页面请求更新,或再次使用 Powershell WebRequest:
Invoke-WebRequest 'http://localhost:1959/Your message here'
Invoke-WebRequest 'http://localhost:1959/?q=Your message here'
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