helpers/Invoke-ClientContextLoad.ps1
|
#Requires -Version 3.0 <# Invoke-ClientContextLoad.ps1 Copyright (c) 2017 karamem0 This software is released under the MIT License. https://github.com/karamem0/SPClient/blob/master/LICENSE #> function Invoke-ClientContextLoad { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [Microsoft.SharePoint.Client.ClientContext] $ClientContext = $SPClient.ClientContext, [Parameter(Mandatory = $true)] [Microsoft.SharePoint.Client.ClientObject] $ClientObject, [Parameter(Mandatory = $false)] [string] $Retrieval ) process { $ItemType = $ClientObject.GetType() $FuncType = [type]'System.Func`2' | &{ process { $_.MakeGenericType($ItemType, [object]) } } $ExprType = [type]'System.Linq.Expressions.Expression`1' | &{ process { $_.MakeGenericType($FuncType) } } $ListType = [type]'System.Collections.Generic.List`1' | &{ process { $_.MakeGenericType($ExprType) } } $LambdaExprs = New-Object $ListType if (-not [string]::IsNullOrEmpty($Retrieval)) { if (Test-GenericSubclassOf -InputType $ItemType -TestType 'Microsoft.SharePoint.Client.ClientObjectCollection`1') { if (-not ($Retrieval.StartsWith('Include(') -and $Retrieval.EndsWith(')'))) { $Retrieval = 'Include(' + $Retrieval + ')' } $ParamExpr = [System.Linq.Expressions.Expression]::Parameter($ItemType, $ItemType.Name) $PropExpr = Convert-RetrievalIncludeExpression -InputString $Retrieval -Expression $ParamExpr $LambdaExpr = [System.Linq.Expressions.Expression]::Lambda($FuncType, $PropExpr, $ParamExpr) $LambdaExprs.Add($LambdaExpr) } else { if ($Retrieval.StartsWith('Include(') -and $Retrieval.EndsWith(')')) { $Retrieval = $Retrieval.Substring(8, $Retrieval.Length - 9) } $ParamExpr = [System.Linq.Expressions.Expression]::Parameter($ItemType, $ItemType.Name) $Splits = Split-RetrievalExpressionString -InputString $Retrieval -Separator ',' foreach ($Split in $Splits) { $PropExpr = Convert-RetrievalMemberAccessExpression -InputString $Split -Expression $ParamExpr $CastExpr = [System.Linq.Expressions.Expression]::Convert($PropExpr, [object]) $LambdaExpr = [System.Linq.Expressions.Expression]::Lambda($FuncType, $CastExpr, $ParamExpr) $LambdaExprs.Add($LambdaExpr) } } } $LoadMethod = $ClientContext.GetType().GetMethod('Load').MakeGenericMethod($ItemType) $LoadMethod.Invoke($ClientContext, @($ClientObject, $LambdaExprs.ToArray())) | Out-Null $ClientContext.ExecuteQuery() } } |