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sharepoint list query working at root, I need this code to work even if the list is below the root

I have the following code that I am trying to fix.  This will work if I keep "mylist" at the root.  I need it to work even if the list exists in a subsite.  Unfortunately the only thing that I know is the name of the list.  I won't know if it is in the root or lower.  I need to be able to access the SPListItem.  I have been trying to use SPSiteDataQuery, but I can't get anything to work.  I am not sure what the issue is.  I do know the guid of the column 4b7403de-8d94-43e8-9f0f-137a3e298126, but there is no content type, and I don't know the list guid
 
using (SPSite ospSite = new SPSite("http://mysite"))  //this is the issue.  It works on mysite, but not on mysite/subsite or /sub/sub/sub...
{                   
    web = ospSite.OpenWeb();
    SPList doclist = web.Lists["mylist"];
    SPFolder folder = doclist.RootFolder;
    SPQuery qry = new SPQuery();
    string camlQuery = "<Where><Eq><FieldRef Name='UniqueId' /><Value Type='Lookup'>69d51de9-b5b3-424b-9cd5-62a6b8cbcbae</Value></Eq></Where>";
    SPListItemCollection docItems = doclist.GetItems(qry);
    if (docItems != null && docItems.Count > 0)
        {
        SPListItem theListItem = docItems[0];
        ...more code here
}

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jackjohnson44
Asked:
jackjohnson44
1 Solution
 
PstryCommented:
If you are using MOSS 2010 this powershell code works:

$ssdq = New-Object -TypeName Microsoft.SharePoint.SPSiteDataQuery
$ssdq.Webs = "<Webs Scope='SiteCollection' />"
$ssdq.ViewFields = "<FieldRef Name='Title' Nullable='TRUE' /><ListProperty Name='Title' />"
$ssdq.Lists = "<Lists BaseType='1' />" # enter valid list type (0-generic, 1-doclib)
$ssdq.Query = "<Where><Eq><FieldRef Name='UniqueId' /><Value Type='Guid'>00000000-1111-2222-3333-444444444444</Value></Eq></Where>"
$w = Get-SPWeb -Identity http://your-site-url
$dt = $w.GetSiteData($ssdq)
if ($dt.Rows.Count -gt 0) { $dt.Rows | % { Write-Host $_.ItemArray } }
$w.Dispose()
Remove-Variable w,dt,ssdq

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Maybe the "Value Type='Lookup'" you are using in your code makes problem (type should be Guid). So your query (MOSS 2007/2010) should look like this:

...
 web = ospSite.OpenWeb();
 SPSiteDataQuery qry = new SPQuery();
 qry.Query = "<Where><Eq><FieldRef Name='UniqueId' /><Value Type='Guid'>69d51de9-b5b3-424b-9cd5-62a6b8cbcbae</Value></Eq></Where>";
 qry.List = "<Lists BaseType='1' />"; // if Document Library
 qry.ViewFields = "<FieldRef Name='Title' Nullable='TRUE' /><ListProperty Name='Title' />";
 DataTable table = web.GetSiteData(query);

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