Compare-DataTable
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function Compare-DataTable { | |
<# | |
.SYNOPSIS | |
Compare two DataTables. | |
.DESCRIPTION | |
Compare two DataTables. | |
.EXAMPLE | |
Compare-DataTable -ReferenceTabel $table1 -DifferenceTable $table2 -CompareMode 'Full' | |
Performes a full compare of $table1 and $table2 | |
.NOTES | |
Author: Øyvind Kallstad | |
Date: 20.10.2014 | |
Version: 1.0 | |
#> | |
[CmdletBinding()] | |
[OutputType([System.Boolean])] | |
param ( | |
[Parameter()] | |
[System.Data.DataTable] $ReferenceTable, | |
[Parameter()] | |
[System.Data.DataTable] $DifferenceTable, | |
# Schema only compares the table structure while Full compares the data as well. | |
[Parameter()] | |
[ValidateSet('Full','Schema')] | |
[string] $CompareMode = 'Schema' | |
) | |
if (-not (Compare-DataTableSchema -ReferenceTable $ReferenceTable -DifferenceTable $DifferenceTable)) { | |
return $false | |
} | |
if($CompareMode -eq 'Full') { | |
foreach ($row in $ReferenceTable.Rows) { | |
if (-not(Compare-DataRow -ReferenceRow $row -DifferenceRow ($DifferenceTable.Rows | Where-Object {$_.Name -eq $row.Name}))) { | |
return $false | |
} | |
} | |
} | |
return $true | |
} | |
# Helper function for Compare-DataTable | |
function Compare-DataColumn { | |
[CmdletBinding()] | |
[OutputType([System.Boolean])] | |
param ( | |
[System.Data.DataColumn] $ReferenceColumn, | |
[System.Data.DataColumn] $DifferenceColumn | |
) | |
if ($ReferenceColumn.ColumnName -ne $DifferenceColumn.ColumnName) { | |
return $false | |
} | |
if ($ReferenceColumn.DataType -ne $DifferenceColumn.DataType) { | |
return $false | |
} | |
return $true | |
} | |
# Helper function for Compare-DataTable | |
function Compare-DataTableSchema { | |
[CmdletBinding()] | |
[OutputType([System.Boolean])] | |
param ( | |
[System.Data.DataTable] $ReferenceTable, | |
[System.Data.DataTable] $DifferenceTable | |
) | |
if ($ReferenceTable.Columns.Count -ne $DifferenceTable.Columns.Count) { | |
return $false | |
} | |
else { | |
$referenceTableColumns = $ReferenceTable.Columns | |
$differenceTableColumns = $DifferenceTable.Columns | |
foreach ($column in $referenceTableColumns) { | |
if (-not (Compare-DataColumn -ReferenceColumn $column -DifferenceColumn ($differenceTableColumns | Where-Object {$_.Ordinal -eq $column.Ordinal}))) { | |
return $false | |
} | |
} | |
} | |
return $true | |
} | |
# Helper function for Compare-DataTable | |
function Compare-DataRow { | |
[CmdletBinding()] | |
[OutputType([System.Boolean])] | |
param ( | |
[System.Data.DataRow] $ReferenceRow, | |
[System.Data.DataRow] $DifferenceRow | |
) | |
foreach ($property in ($ReferenceRow | Get-Member -MemberType 'Property')) { | |
$propertyName = $property.Name | |
if ($ReferenceRow.$propertyName -ne $DifferenceRow.$propertyName) { | |
return $false | |
} | |
} | |
return $true | |
} |
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