[Mono-aspnet-list] LinqDataSourceView NullReferenceException

sigma54 conwaykyle at mail.com
Tue Feb 21 22:42:25 UTC 2012 

I'm having some trouble porting an ASP.NET web application to Linux. I'm
using DbLinq to connect to MySQL - I created a parameterless constructor so
that LinqDataSource should work. Most things seem to be working well except
that I'm getting a null reference exception when LinqDataSourceView tries to
do a MoveNext although it works fine on Windows with the same configuration.
Anyone have any idea what might be causing the issue?

Thanks!
Kyle

*Code Snippet That Creates LinqDataSource:*
LinqDataSource ds = new LinqDataSource();
ds.AutoGenerateWhereClause = true;
ds.ContextTypeName = "DataClassesDataContext";
ds.TableName = "Clusters";
ds.Select = "new (GenbankAccession, Description, Enum_Phyla.Phylum as
Phylum, OrgName, BPStart, BPEnd, Lineage, ID, UserInfo.User_Name as
Contributor, UserInfo.First_Name as FirstName, UserInfo.Last_Name as
LastName, UserInfo.Lab_Name as LabName, UserInfo.Lab_Url as LabURL,
CompoundFamily.FamilyName as FamilyName,
CompoundFamily.Enum_PathwayType.Type as PathwayTypeName)";
ds.WhereParameters.Add("OrgName", orgname);
ds.WhereParameters.Add("CompoundFamily.FamilyName",
parameters["CompoundFamily"]);

GridView gv = new GridView();
GridViewTemplate.applyStyletoGridView(gv);
gv.ID = setting;
gv.DataSource = ds;

*Here is the stack trace (long): *
System.NullReferenceException: Object reference not set to an instance of an
object
  at System.Web.UI.WebControls.LinqDataSourceView+c__IteratorB.MoveNext ()
[0x000d7] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/LinqDataSourceView.cs:274 
  at System.Web.UI.WebControls.GridView.CreateChildControls (IEnumerable
data, Boolean dataBinding) [0x00361] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/GridView.cs:1486 
  at System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding
(IEnumerable data) [0x00012] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/CompositeDataBoundControl.cs:65 
  at System.Web.UI.WebControls.GridView.PerformDataBinding (IEnumerable
data) [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/GridView.cs:1771 
  at System.Web.UI.WebControls.DataBoundControl.InternalPerformDataBinding
(IEnumerable data) [0x0001e] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:251 
  at System.Web.UI.WebControls.DataBoundControl.OnSelect (IEnumerable data)
[0x00016] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:242 
  at System.Web.UI.DataSourceView.Select
(System.Web.UI.DataSourceSelectArguments selectArgs,
System.Web.UI.DataSourceViewSelectCallback callBack) [0x00020] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/DataSourceView.cs:149 
  at System.Web.UI.WebControls.DataBoundControl.PerformSelect () [0x00029]
in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:225 
  at System.Web.UI.WebControls.BaseDataBoundControl.DataBind () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs:141 
  at System.Web.UI.WebControls.GridView.DataBind () [0x00012] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/GridView.cs:1756 
  at OrgListViewTemplate.container_DataBinding (System.Object sender,
System.EventArgs e) [0x00000] in :0 
  at System.Web.UI.Control.OnDataBinding (System.EventArgs e) [0x00029] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:1175 
  at System.Web.UI.Control.DataBind (Boolean raiseOnDataBinding) [0x0003c]
in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:2041 
  at System.Web.UI.Control.DataBind () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:1470 
  at System.Web.UI.WebControls.ListView.InsertDataItem (System.Object
dataItem, System.Web.UI.Control container, Boolean dataBinding,
System.Collections.ArrayList keyArray, Int32 startIndex, Int32 position,
System.Int32& displayIndex) [0x000b3] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:977 
  at System.Web.UI.WebControls.ListView.CreateItemsWithoutGroups
(System.Web.UI.WebControls.ListViewPagedDataSource dataSource, Boolean
dataBinding, InsertItemPosition insertPosition, System.Collections.ArrayList
keyArray) [0x00162] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:1166 
  at System.Web.UI.WebControls.ListView.CreateChildControls (IEnumerable
dataSource, Boolean dataBinding) [0x00135] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:838 
  at System.Web.UI.WebControls.ListView.PerformDataBinding (IEnumerable
data) [0x00058] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:1900 
  at System.Web.UI.WebControls.DataBoundControl.InternalPerformDataBinding
(IEnumerable data) [0x0001e] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:251 
  at System.Web.UI.WebControls.DataBoundControl.OnSelect (IEnumerable data)
[0x00016] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:242 
  at System.Web.UI.DataSourceView.Select
(System.Web.UI.DataSourceSelectArguments selectArgs,
System.Web.UI.DataSourceViewSelectCallback callBack) [0x00020] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/DataSourceView.cs:149 
  at System.Web.UI.WebControls.DataBoundControl.PerformSelect () [0x00029]
in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:225 
  at System.Web.UI.WebControls.ListView.PerformSelect () [0x00006] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:1908 
  at System.Web.UI.WebControls.BaseDataBoundControl.DataBind () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs:141 
  at System.Web.UI.Control.DataBindChildren () [0x0003d] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:1481 
  at System.Web.UI.Control.DataBind (Boolean raiseOnDataBinding) [0x00047]
in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:2042 
  at System.Web.UI.Control.DataBind () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:1470 
  at System.Web.UI.Control.DataBindChildren () [0x0003d] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:1481 
  at System.Web.UI.Control.DataBind (Boolean raiseOnDataBinding) [0x00047]
in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:2042 
  at System.Web.UI.Control.DataBind () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Control.cs:1470 
  at System.Web.UI.WebControls.ListView.InsertDataItem (System.Object
dataItem, System.Web.UI.Control container, Boolean dataBinding,
System.Collections.ArrayList keyArray, Int32 startIndex, Int32 position,
System.Int32& displayIndex) [0x000b3] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:977 
  at System.Web.UI.WebControls.ListView.CreateItemsWithoutGroups
(System.Web.UI.WebControls.ListViewPagedDataSource dataSource, Boolean
dataBinding, InsertItemPosition insertPosition, System.Collections.ArrayList
keyArray) [0x00162] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:1166 
  at System.Web.UI.WebControls.ListView.CreateChildControls (IEnumerable
dataSource, Boolean dataBinding) [0x00135] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:838 
  at System.Web.UI.WebControls.ListView.PerformDataBinding (IEnumerable
data) [0x00058] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:1900 
  at System.Web.UI.WebControls.DataBoundControl.InternalPerformDataBinding
(IEnumerable data) [0x0001e] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:251 
  at System.Web.UI.WebControls.DataBoundControl.OnSelect (IEnumerable data)
[0x00016] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:242 
  at System.Web.UI.DataSourceView.Select
(System.Web.UI.DataSourceSelectArguments selectArgs,
System.Web.UI.DataSourceViewSelectCallback callBack) [0x00020] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/DataSourceView.cs:149 
  at System.Web.UI.WebControls.DataBoundControl.PerformSelect () [0x00029]
in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/DataBoundControl.cs:225 
  at System.Web.UI.WebControls.ListView.PerformSelect () [0x00006] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web.Extensions/System.Web.UI.WebControls/ListView.cs:1908 
  at System.Web.UI.WebControls.BaseDataBoundControl.DataBind () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs:141 
  at BrowseList.instantiateBrowseTemplate (System.String rootpath, Int32
viewtype) [0x00000] in :0 
  at
NaturalProductsWebsite.Controls.MainListsControl.RadioButtonList1_SelectedIndexChanged
(System.Object sender, System.EventArgs e) [0x00000] in :0 
  at System.Web.UI.WebControls.ListControl.OnSelectedIndexChanged
(System.EventArgs e) [0x0001c] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/ListControl.cs:455 
  at System.Web.UI.WebControls.RadioButtonList.RaisePostDataChangedEvent ()
[0x00035] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/RadioButtonList.cs:261 
  at
System.Web.UI.WebControls.RadioButtonList.System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent
() [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI.WebControls/RadioButtonList.cs:271 
  at System.Web.UI.Page.RaiseChangedEvents () [0x00025] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Page.cs:1639 
  at System.Web.UI.Page.ProcessRaiseEvents () [0x0002b] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Page.cs:1498 
  at System.Web.UI.Page.InternalProcessRequest () [0x001c5] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Page.cs:1443 
  at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext context)
[0x0005b] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Page.cs:1269 
  --- End of inner exception stack trace ---
  at System.Web.UI.Page.ProcessException (System.Exception e) [0x00053] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Page.cs:1307 
  at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext context)
[0x00089] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web.UI/Page.cs:1281 
  at System.Web.HttpApplication+c__Iterator6.MoveNext () [0x00d81] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web/HttpApplication.cs:1368 
  at System.Web.HttpApplication.Tick () [0x00000] in
/home/abuild/rpmbuild/BUILD/mono-2.10.6/mcs/class/System.Web/System.Web/HttpApplication.cs:932

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