使用 C# 中的 PowerShell 计算属性 [英] Using PowerShell Calculated Properties from C#

问题描述

所以我想从 C# 执行 PowerShell 计算属性(我希望这是正确的名称).

So I want to execute PowerShell Calculated Properties (I hope that's the correct name) from C#.

我在 PS (Exchange) 控制台中的 CmdLet 如下所示:

My CmdLet in the PS (Exchange) Console looks like this:

Get-Something -ResultSize unlimited |Select-Object DisplayName,@{name="RenamedColumn;expression={$_.Name}},ToBeExpanded -Expand ToBeExpanded |Select-Object DisplayNameRenamedColumn,ToBeExpandedGuid

这很好用，当我尝试从 C# 执行它时出现问题.

This works just fine, the problem occures when I try to execute it from C#.

我的代码如下所示:

List<string> parameters = new List<string>()
            {
                "DisplayName","@{{name=\"RenamedColumn\";expression={{$_.Name }} }}","ToBeExpanded"
            };
List<string> parameters2 = new List<string>()
            {
                "DisplayName","RenamedColumn","ToBeExpanded","ToBeExpandedGuid"
            };
    powershell.AddCommand("Get-Something");
    powershell.AddParameter("ResultSize","unlimited");
    powershell.AddCommand("Select-Object");
    powershell.AddParameter("Property",parameters);
    powershell.AddParameter("ExpandProperty","ToBeExpanded");
    powershell.AddCommand("Select-Object");
    powershell.AddParameters("Property",parameters2);

    result = powershell.Invoke();

然后我的结果包含空的 ToBeExpandedGuid (null).所以我在没有第二个选择的情况下尝试了这个命令，它告诉我它有这个列:

My result then contains the empty ToBeExpandedGuid (null). So I tried the command without the second select and it shows me that it has the column:

@{{name=\"RenamedColumn\";expression={{$_.Name }} }}

所以我的想法是 powershell 无法识别这种重命名...现在我的问题是如何使用 C# 中的类似内容?有什么解决办法吗?

So my thought was that powershell doesn't recognize this renaming... Now my question how do I use something like this from C#? Is there any solution?

推荐答案

在 PowerShell @{Name="RenamedColumn";Expression={$_.Name}} 不是字符串而是 Hashtable，因此在 C# 中，您还必须创建一个 Hashtable(或其他实现 IDictionary 的集合)以将其传递给 Select-Object cmdlet:

In PowerShell @{Name="RenamedColumn";Expression={$_.Name}} is not a string but a Hashtable, so in C# you also have to create a Hashtable (or other collection implementing IDictionary) to pass it to Select-Object cmdlet:

new Hashtable{
    {"Name","RenamedColumn"},
    {"Expression",ScriptBlock.Create("$_.Name")}
}

附注
如果您想要的只是重命名，那么这里不需要 ScriptBlock:

@{Name="RenamedColumn";Expression="Name"}

new Hashtable{
    {"Name","RenamedColumn"},
    {"Expression","Name"}
}

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