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POUpdating context after db modification using a stored procedure
 

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  1. POUpdating context after db modification using a stored procedure
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    <p>In a Silverlight application I use a stored procedure to update a table of my data base.</p> <pre><code>ALTER PROCEDURE [dbo].[SP_ADD_MIS_MISSION] ( @IdMission as int, @IdVersion as smallint, @LibMission as varchar (50) ) AS BEGIN DECLARE @IDNEWVERSION as int = 1, @IDNEWMISSION as int = @IdMission, @supp as bit = 1 BEGIN IF @IdMission != 0 AND @IdMission is not NULL BEGIN SELECT @IDNEWVERSION = MAX(IDVERSION)+1 FROM MIS_Mission where MIS_Mission.IdMission=@IdMission Update MIS_Mission SET Suppression = @supp WHERE MIS_Mission.IdMission=@IdMission AND MIS_Mission.IdVersion=(@IDNEWVERSION-1) END ELSE BEGIN SET @IDNEWVERSION = 1 select @IDNEWMISSION = MAX(MIS_Mission.IdMission)+1 from MIS_Mission if @IDNEWMISSION is NULL SET @IDNEWMISSION=1 END Insert MIS_Mission ( IdMission, IdVersion, LibMission, Suppression ) values ( @IDNEWMISSION, @IDNEWVERSION, @LibMission, @Suppression ) SELECT @IDNEWMISSION END </code></pre> <p>I added this code in my WCF RIA services to launch the stored procedure:</p> <pre><code>public void SetMission(MIS_Mission mis) { _entity.ADD_MIS_MISSION(mis.IdMission,mis.IdVersion,mis.LibMission); } </code></pre> <p>And I added this code in my Silverlight application to update my database whith the value enter in my datagrid :</p> <pre><code>private void UpdateMission_Click(object sender, RoutedEventArgs e) { foreach(MIS_Mission mis in dG_Mission.ItemsSource) { var operation = _Context.SetMission(mis); operation.Completed += (se, ev) =&gt; { }; } } </code></pre> <p>But when I finished to update my database, my context didn't updat whith the new values of IdVersion, and my datagrid display the old versions of my missions.</p> <p>How can I update my context without reload my datagrid?</p>
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    1. USFabrice Mainguené
    1. USFabrice Mainguené
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    1. COdoes `_Context.SetMission(mis);` trigger event? If yes you need to assign `operation.Completed += (se, ev) =>` before you call it. If no, you need to fire event which will trigger `operation.Completed` after you attach it
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      1. USNogard
    2. COThank you for your reply. my `operation.Completed +=` seems working this way. When I try I have no problem.
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      1. POUpdating context after db modification using a stored procedure
      1. USFabrice Mainguené
    3. COdo you retrieve data from database once you updated it? if not, your application may not know you have updated anything. If you don't want to re-query database, you need to store underlying data in `List<>` or any other structure and rebind `datagrid` to it after each update to DB. Another approach is to use `DataBinding` with implementation of `INotifyPropertyChanged` - with this approach your UI `datagrid` will be automatically updated from underlying structure.
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      1. USNogard
 

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