ConstraintException Error While Filling Dataset?

Nov 15, 2006

Hi,

  I always get a "ConstraintException" error when trying, at beginning of application, to run following statement (within "Form1_Load" routine called by "this->Load" EventHandler):

"this->TauxTaxeTableAdapter->FillByPays(this->TauxTaxeDataSet->TauxTaxe,Cur_GrdView_SlPays);"

  Also curiously if, while application is still running, I invoke again that same statement by means of a pushbutton clickevent,  everything is running smootly without error...  Looks to me that it is bugging only when running the first time...

  Within Dataset, I tried to see what constraint could give me such trouble.  Here is the only constraint I could find:

"this->Constraints->Add((gcnew System::Data::UniqueConstraint(L"Constraint1", gcnew cli::array< System::Data::DataColumn^ >(2) {this->columnPays, this->columnProvince_Etat}, true)));" 

  I then tried to find within "TauxTaxe" table if there could be any trace of records where "Pays" and "Province_Etat" columns would show any null value as well as any duplicate key values but there wasn't any... 

  Any place I should start to look for?  BTW, I'm using a SQL Express database.

Thanks for your help,

Stéphane

Here is the detailed error log I got:

System.Data.ConstraintException: Impossible d'activer les contraintes. Une ou plusieurs lignes contiennent des valeurs qui violent les contraintes de type non null, unique ou de clé externe.
   Ã System.Data.DataSet.FailedEnableConstraints()
   Ã System.Data.DataSet.EnableConstraints()
   Ã System.Data.DataSet.set_EnforceConstraints(Boolean value)
   Ã System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords)
   Ã System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
   Ã System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior)
   Ã System.Data.Common.DbDataAdapter.Fill(DataTable dataTable)
   Ã Test_ADO.DS_TauxTaxeTableAdapters.TA_TauxTaxe.FillByPays(TauxTaxeDataTable dataTable, String Pays) dans d:projetvisual c++ 2005projets c++cli est_adods_tauxtaxe.h:ligne 1247
   Ã Test_ADO.Form1.Sel_Pays_NewSel(Object sender, EventArgs e) dans d:projetvisual c++ 2005projets c++cli est_adoform1.h:ligne 1887
   Ã System.Windows.Forms.RadioButton.OnCheckedChanged(EventArgs e)
   Ã System.Windows.Forms.RadioButton.set_Checked(Boolean value)
   Ã Test_ADO.Form1.Init_Form1() dans d:projetvisual c++ 2005projets c++cli est_adoform1.h:ligne 1480
   Ã Test_ADO.Form1.Form1_Load(Object sender, EventArgs e) dans d:projetvisual c++ 2005projets c++cli est_adoform1.h:ligne 1446
   Ã System.Windows.Forms.Form.OnLoad(EventArgs e)
   Ã System.Windows.Forms.Form.OnCreateControl()
   Ã System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   Ã System.Windows.Forms.Control.CreateControl()
   Ã System.Windows.Forms.Control.WmShowWindow(Message& m)
   Ã System.Windows.Forms.Control.WndProc(Message& m)
   Ã System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   Ã System.Windows.Forms.ContainerControl.WndProc(Message& m)
   Ã System.Windows.Forms.Form.WmShowWindow(Message& m)
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   Ã System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   Ã System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   Ã System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Finally, SQL Statement for "TA_TauxTaxe::FillByPays" is the following:

SELECT        Pays, Province_Etat, Taxe1_Appl, Taxe1_Dsc, Taxe1_Taux, Taxe2_Appl, Taxe2_Dsc, Taxe2_Taux
FROM            TauxTaxe
WHERE        (Pays = @Pays)

In debug mode, I double-checked and could verify that @Pays didn't have any null value but a valid string value at time "Fill" routine was invoked.  Any clue?

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 hello, i'd need a little help with filling GridViewsi browsed over like 10 search pages, but couldnt find any which would solve my problem.so in my ajax project i made a testing page pulled a gridview (GridView1) on it with a fhew buttons and textboxes.i need to fill the gv from code so my websie.asp.cs looks like this 1 protected void Page_Load(object sender, EventArgs e)2 {3 4 5 string connstr = "Data Source=.;database=teszt;user id=user;password=pass";6 SqlConnection conn = new SqlConnection(connstr);7 SqlCommand comm = new SqlCommand("select * from users", conn);8 conn.Open();9 SqlDataReader reader;10 reader = comm.ExecuteReader();11 if (reader.HasRows)12 {13 GridView1.DataSource = reader;14 GridView1.DataBind();15 }16 reader.Close();17 conn.Close();18 comm.Dispose();19 } so i load the page and there's no gridview on the page at all, nor an error msg, the connection and the database/table is fine.any suggestions on what am i doing wrong? and i also like to know if there would be any problem with using this on a tabcontrol/tabthankyou  

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Filling A Table In Sqlserver2005

Apr 9, 2008

hello everyone
i have created a table in sqlserver2005  named "Departments" - in this table different departments of a telephone ( landline ) company are to be stored,which deals with complaints registered to them by there users.
i want to know the name of these different departments which deals with complaints assigned to them like if i do have complaint from a user who has problem with his handset then that complaint will be assigned to "Maintance dept."
as i was never in indusrty , i need the help in filling the table.
just do write me name of departments and the nature of complaints wh they deal with!!!
thanks for the consideration

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Filling In Missing Values

Oct 29, 2004

I have a table that keeps track of click statistics for each one of my dealers.. I am creating graphs based on number of clicks that they received in a month, but if they didn't receive any in a certain month then it is left out..I know i have to do some outer join, but having trouble figuring exactly how..here is what i have:

select d.name, right(convert(varchar(25),s.stamp,105),7), isnull(count(1),0)
from tblstats s(nolock)
join tblDealer d(nolock)
on s.dealerid=d.id
where d.id=31
group by right(convert(varchar(25),s.stamp,105),7),d.name
order by 2 desc,3,1

this dealer had no clicks in april so this is what shows up:
joe blow 10-2004 567
joe blow 09-2004 269
joe blow 08-2004 66
joe blow 07-2004 30
joe blow 06-2004 8
joe blow 05-2004 5
joe blow 03-2004 9

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