Question

我有一个简单的函数来查找Oracle中的一些数据，并返回一个包含表中各种数据元素的对象。

function Get-OracleInfo {

[OutputType([PSObject])]
Param(  [Parameter(Mandatory=$False)][string]$BindValue,
[Parameter(Mandatory=$True)][string]$OraclePath,
[Parameter(Mandatory=$True)][string]$OracledbConnectionString,)

Begin {
$Query="select stuff......" 
Add-Type -Path $OraclePath
}

PROCESS {

#get data 
try {
$connection=New-Object Oracle.ManagedDataAccess.Client.OracleConnection($OracledbConnectionString)
$connection.Open()
$OprIDLookupCmd=$connection.CreateCommand()
$OprIDLookupCmd.CommandText=$Query

#set bind value to parameter
$OprIDLookupBindParam = New-Object Oracle.ManagedDataAccess.Client.OracleParameter
$AccountLookupBindParam.Value = $BindValue
$AccountLookupCmd.Parameters.Add($AccountLookupBindParam) 
$AccountRdr=$AccountLookupCmd.ExecuteReader()
if ($AccountRdr.Read()) {
$accountInfo = New-Object psobject -Property @{'StringVal1'=$AccountRdr.Item("field1")
'StringVal2'=$AccountRdr.Item("field2")
'Date1'=[datetime]$AccountRdr.Item("field3")}

}
}
catch
{
Write-Error ("Error in lookup Account - Can't open connection: {0}`n{1}" -f

$connection.ConnectionString, $_.Exception.ToString())
}
}

END {
if ($connection.State -eq 'Open') { $connection.close() }
return $accountInfo
}

它在Oracle中获取数据就好了，并将表字段分配给对象就好了。在调试中运行它时，查看变量$ accountInfo的值，它返回一个具有3个属性的对象，正如预期的那样。

String1             Date2                     String2   
--------            ------------               -----   
StringVal2      5/11/2016 12:00:00 AM         StringVal2

但是当从命令行调用函数并将其分配给变量.....从函数返回时，它显示为具有2个元素的数组。

$UserData=Get-OracleInfo -BindValue $account -OraclePath $OraclePath -OracledbConnectionString $OracledbConnectionString

$ UserData [1]是返回的对象（意味着它显示具有Stringval1，Stringval2，Date1的3个属性的对象）。我无法弄清楚它是作为一个数组返回的原因，第一个元素（即$ UserData [0]）是一个OracleObject。以下是运行命令时的详细信息

$UserData | Get-Member 

TypeName: Oracle.ManagedDataAccess.Client.OracleParameter

Name                      MemberType Definition                                                                        
----                      ---------- ----------                                                                        
Clone                     Method     System.Object Clone(), System.Object ICloneable.Clone()                           
CreateObjRef              Method     System.Runtime.Remoting.ObjRef CreateObjRef(type requestedType)                   
Dispose                   Method     void Dispose(), void IDisposable.Dispose()                                        
Equals                    Method     bool Equals(System.Object obj)                                                    
GetHashCode               Method     int GetHashCode()                                                                 
GetLifetimeService        Method     System.Object GetLifetimeService()                                                
GetType                   Method     type GetType()                                                                    
InitializeLifetimeService Method     System.Object InitializeLifetimeService()                                         
ResetDbType               Method     void ResetDbType()                                                                
ResetOracleDbType         Method     void ResetOracleDbType()                                                          
ToString                  Method     string ToString()                                                                 
ArrayBindSize             Property   int[] ArrayBindSize {get;set;}                                                    
ArrayBindStatus           Property   Oracle.ManagedDataAccess.Client.OracleParameterStatus[] ArrayBindStatus {get;set;}
CollectionType            Property   Oracle.ManagedDataAccess.Client.OracleCollectionType CollectionType {get;set;}    
DbType                    Property   System.Data.DbType DbType {get;set;}                                              
Direction                 Property   System.Data.ParameterDirection Direction {get;set;}                               
IsNullable                Property   bool IsNullable {get;set;}                                                        
Offset                    Property   int Offset {get;set;}                                                             
OracleDbType              Property   Oracle.ManagedDataAccess.Client.OracleDbType OracleDbType {get;set;}              
OracleDbTypeEx            Property   Oracle.ManagedDataAccess.Client.OracleDbType OracleDbTypeEx {get;set;}            
ParameterName             Property   string ParameterName {get;set;}                                                   
Precision                 Property   byte Precision {get;set;}                                                         
Scale                     Property   byte Scale {get;set;}                                                             
Size                      Property   int Size {get;set;}                                                               
SourceColumn              Property   string SourceColumn {get;set;}                                                    
SourceColumnNullMapping   Property   bool SourceColumnNullMapping {get;set;}                                           
SourceVersion             Property   System.Data.DataRowVersion SourceVersion {get;set;}                               
Status                    Property   Oracle.ManagedDataAccess.Client.OracleParameterStatus Status {get;set;}           
UdtTypeName               Property   string UdtTypeName {get;set;}                                                     
Value                     Property   System.Object Value {get;set;}                                                    


   TypeName: System.Management.Automation.PSCustomObject

Name         MemberType   Definition                                 
----         ----------   ----------                                 
Equals       Method       bool Equals(System.Object obj)             
GetHashCode  Method       int GetHashCode()                          
GetType      Method       type GetType()                             
ToString     Method       string ToString()                          
Date1         NoteProperty datetime Date1=5/11/2016 12:00:00 AM

StringVal2   NoteProperty string StringVal2=String2                      
StringVal1   NoteProperty string StringVal1=String1

希望我对事件和问题的解释是有道理的......我完全不知所措，所以感谢任何帮助。谢谢！

Answer 1

尝试抛弃添加操作的结果：

[void]$AccountLookupCmd.Parameters.Add($AccountLookupBindParam)

PowerShell函数返回意外数据

1 个答案: