为什么直接访问静态失败,但间接工作?请注意,加载的文件在两个示例中均有效。
使用直接静态失败
class OpPrj {
[string] $ProjectPath
static [string] $configFile = 'settings.json';
[OpPrj] static GetSettings(){
return [OpPrj](Get-Content [OpPrj]::configFile | Out-String|ConvertFrom-Json);
}
通过分配到本地工作
class OpPrj {
[string] $ProjectPath
static [string] $configFile = 'settings.json';
[OpPrj] static GetSettings(){
$file = [OpPrj]::configFile
Write-Host $file # outputs settings.json
return [OpPrj](Get-Content $file | Out-String | ConvertFrom-Json);
}
您在调用Get-Content
时出现语法错误:
Get-Content [OpPrj]::configFile
PowerShell解析器无法确定结束的位置(我不确定原因),因此您需要将其明确地包装在括号中(我还建议明确说明您传递的参数,特别是在脚本中,以提高可读性):
Get-Content -Path ([OpPrj]::configFile)
您需要为枚举和静态类成员遵循此语法。
总之(你不需要调用Out-String
):
class OpPrj
{
[string] $ProjectPath
static [string] $ConfigFile = 'settings.json'
static [OpPrj] GetSettings()
{
return [OpPrj](Get-Content -Path ([OpPrj]::ConfigFile) -Raw | ConvertFrom-Json)
}
}