Change DataSource of SSRS Report with Powershell

Question

I'm trying to ahange data sources of multiple SSRS Report with Powershell to one shared data source on my reporting server. Here my code:

cls;  
$reportserver = "myServer";<br/>
$url = "http://$($reportserver)/reportserver/reportservice2005.asmx?WSDL";";<br/>
$ssrs = New-WebServiceProxy -uri $url -UseDefaultCredential -Namespace "ReportingWebService";

[ReportingWebService.DataSource[]] $myDataSource = new-object ReportingWebService.DataSource
$myDataSource[0].Name = "myDS"";<br/>
$myDataSource[0].Item = New-Object ReportingWebService.DataSourceReference<br/>
$myDataSource[0].Item.Reference = "/Data Sources/MyDS"<br/>

$reports = $ssrs.ListChildren('/DH', $false)

$reports | ForEach-Object {<br/>
$reportPath = $_.path<br/>
 Write-Host "Report: " $reportPath<br/>
 $dataSources = $ssrs.GetItemDataSources($reportPath)<br/>
 $dataSources | ForEach-Object {<br/>
              Write-Host "Old source: $($_.Name), $($_.Item.ConnectString)"<br/>
              $ssrs.SetItemDataSources($reportPath, $myDataSource)<br/>
              Write-Host "New source: $($_.Name), $($_.Item.ConnectString)"<br/>
          }<br/>

 Write-Host "------------------------"
}

But I'm getting the following error when calling "SetItemDataSources"-method:

***Argument "1" having the value "ReportingWebService.DataSource[]" of "SetItemDataSources" can not be converted to type "ReportingWebService.DataSource[]".***

The question is: What's wrong? The types are the SAME!

Answer 1

Thanks e82.eric!

you led me to the working solution. Here it is:

cls;

#Set variables:
$reportserver = "myServer";
$newDataSourcePath = "/Data Sources/MyDS"
$newDataSourceName = "MyDS";
$reportFolderPath = "/DH"
#------------------------------------------------------------------------

$ssrs = New-WebServiceProxy -uri $url -UseDefaultCredential

$reports = $ssrs.ListChildren($reportFolderPath, $false)

$reports | ForEach-Object {
            $reportPath = $_.path
            Write-Host "Report: " $reportPath
            $dataSources = $ssrs.GetItemDataSources($reportPath)
            $dataSources | ForEach-Object {
                            $proxyNamespace = $_.GetType().Namespace
                            $myDataSource = New-Object ("$proxyNamespace.DataSource")
                            $myDataSource.Name = $newDataSourceName
                            $myDataSource.Item = New-Object ("$proxyNamespace.DataSourceReference")
                            $myDataSource.Item.Reference = $newDataSourcePath

                            $_.item = $myDataSource.Item

                            $ssrs.SetItemDataSources($reportPath, $_)

                            Write-Host "Report's DataSource Reference ($($_.Name)): $($_.Item.Reference)"
                            }

            Write-Host "------------------------" 
            }