powershell - 文件IO，这是Powershell中的一个错误吗？

Question

我在 Powershell 中有以下代码

$filePath = "C:\my\programming\Powershell\output.test.txt"

try
{
    $wStream = new-object IO.FileStream $filePath, [System.IO.FileMode]::Append, [IO.FileAccess]::Write, [IO.FileShare]::Read

    $sWriter = New-Object  System.IO.StreamWriter $wStream

    $sWriter.writeLine("test")
 }

我不断收到错误:

Cannot convert argument "1", with value: "[IO.FileMode]::Append", for "FileStream" to type "System.IO.FileMode": "Cannot convert value "[IO.FileMode]::Append" to type "System.IO.FileMode" due to invalid enumeration values. Specify one of the following enumeration values and try again. The possible enumeration values are "CreateNew, Create, Open, OpenOrCreate, Truncate, Append"."

我尝试了 C# 中的等效方法，

    FileStream fStream = null;
    StreamWriter stWriter = null;

    try
    {
        fStream = new FileStream(@"C:\my\programming\Powershell\output.txt", FileMode.Append, FileAccess.Write, FileShare.Read);
        stWriter = new StreamWriter(fStream);
        stWriter.WriteLine("hahha");
    }

效果很好!

我的 powershell 脚本出了什么问题？顺便说一句，我正在 powershell 上运行

Major  Minor  Build  Revision
-----  -----  -----  --------
3      2      0      2237

Answer 1

另一种方法是仅使用值的名称并让 PowerShell 将其转换为目标类型:

New-Object IO.FileStream $filePath ,'Append','Write','Read'