PowerShell 中与 [ref] 一起使用的 out 参数未填充
我试图从 PowerShell 脚本调用 SharePoint 的 Copy.asmx WebService：
$copyWS = .\Connect-WebService.ps1 $copyWsdlUrl -requiresAuthentication
$copyWS.UseDefaultCredentials = $true
[FieldInformation[]]$fieldInfos = $null
[System.Byte[]]$data = $null
$copyWS.GetItem($fileUrl, [ref]$fieldInfos, [ref]$data)
结果：GetItem 返回 0 表示成功，但 $fieldInfos 和 $data 为 $null。如果我从 C# 控制台应用程序执行相同的操作，则它可以正常工作，并且 data.Length 等于我的文件长度。
Copy copyWS = new Copy();
copyWS.UseDefaultCredentials = true;
FieldInformation[] fieldInfos = null;
byte[] data = null;
uint result = copyWS.GetItem(fileUrl, out fieldInfos, out data);
Console.WriteLine(result);
Console.WriteLine(data.Length);
我的错误在哪里，或者这是一个 PowerShell 错误？
按照 Beefarino 的建议，我调用了 $copyWS.GetItem 并得到：
System.UInt32 GetItem(string Url,
Microsoft.PowerShell.Commands.NewWebserviceProxy.AutogeneratedTypes.WebServiceProxy3http___moss__vti_bin_Copy_asmx.FieldInformation[]&, jfww_71i, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null Fields,
System.Byte[]&, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Stream)
所以我的参数看起来正确，我什至更改了 $fieldInfos 的类型以显示全名 Microsoft.PowerShell.Commands.NewWebserviceProxy.Auto generatedTypes.WebServiceProxy3http___moss__vti_bin_Copy_asmx.FieldInformation[]< /code> 但无济于事。
I'm trying to call the Copy.asmx WebService of SharePoint from a PowerShell Script:
$copyWS = .\Connect-WebService.ps1 $copyWsdlUrl -requiresAuthentication
$copyWS.UseDefaultCredentials = $true
[FieldInformation[]]$fieldInfos = $null
[System.Byte[]]$data = $null
$copyWS.GetItem($fileUrl, [ref]$fieldInfos, [ref]$data)
Result: GetItem returns 0 for success, but $fieldInfos and $data are $null. If I do the same thing from a C# Console Application, it works fine and data.Length equals my file length.
Copy copyWS = new Copy();
copyWS.UseDefaultCredentials = true;
FieldInformation[] fieldInfos = null;
byte[] data = null;
uint result = copyWS.GetItem(fileUrl, out fieldInfos, out data);
Console.WriteLine(result);
Console.WriteLine(data.Length);
Where is my mistake or is this a PowerShell bug?
Following beefarino's advice I called $copyWS.GetItem and got:
System.UInt32 GetItem(string Url,
Microsoft.PowerShell.Commands.NewWebserviceProxy.AutogeneratedTypes.WebServiceProxy3http___moss__vti_bin_Copy_asmx.FieldInformation[]&, jfww_71i, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null Fields,
System.Byte[]&, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Stream)
So my parameters look right, I even changed the type of $fieldInfos to display the full name Microsoft.PowerShell.Commands.NewWebserviceProxy.AutogeneratedTypes.WebServiceProxy3http___moss__vti_bin_Copy_asmx.FieldInformation[] but to no avail.
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假设 connect-webservice.ps1 最终调用 new-webserviceproxy...
使用 get-member 从 powershell 验证 Web 服务方法的签名：
$copyWS | get-member或将方法转储到主机而不调用它：
$copyWS.GetItem代理并不总是如您所期望的那样；例如，对于此方法：
int GetData(out byte[] value);powershell 生成的 new-webserviceproxy 方法如下所示：
void GetData([ref] $result, [ref] $resultSpecified, [ref] $value)Assuming that connect-webservice.ps1 ends up invoking new-webserviceproxy...
Verify the signature of the web service method from powershell using get-member:
$copyWS | get-memberor by dumping the method to the host without invoking it:
$copyWS.GetItemThe proxies don't always look as you'd expect; e.g., for this method:
int GetData(out byte[] value);the new-webserviceproxy method generated by powershell looks like this:
void GetData([ref] $result, [ref] $resultSpecified, [ref] $value)