Wrong Index after a datagrid is sorted -- Help!

  • Thread starter Thread starter Jason
  • Start date Start date
J

Jason

I have a dataadapter that fills a dataset in an asp.net web application. A
DataGrid then pulls data from a dataview whose source is the dataset. All
of this works great.

When I click on 'edit' in the datagrid it returns the proper record (proper
primary key value of the record I'm editing). However, if I sort the
datagrid (via the built-in sorting headers) then click on 'edit' it returns
the original record, not the record now in the sorted place in the datagrid.
That is, if I have a datagrid displaying:

ID Name
================
9 George
3 Jane
6 Harry

and click on any ID it returns the proper index (ie. 9 or 3 or 6) --This is
working as it should. If I sort the data however,(by clicking on 'ID') and
get

ID Name
================
3 Jane
6 Harry
9 George

and click on '3' I always get ID=9 back which is the orginal value of that
index.

I'm sorting the data through a dataview with the following code:

Private Sub DataGrid1_SortCommand(ByVal source As Object, ByVal e As
System.Web.UI.WebControls.DataGridSortCommandEventArgs) Handles
DataGrid1.SortCommand

dvwParam.Sort = e.SortExpression

DataGrid1.DataSource = dvwParam

DataGrid1.DataBind()

End Sub

and when the a specific ID is click I'm getting that value by:

Private Sub DataGrid1_EditCommand(ByVal source As Object, ByVal e As
System.Web.UI.WebControls.DataGridCommandEventArgs) Handles
DataGrid1.EditCommand

'This is the value of the cell(1) a.k.a. ID in the datagrid

propChange_ID = CType(e.Item.Cells(1).Text, String)

End Sub

Am I missing a critical step to sync the dataview with the underlying
datagrid somehow? I'm performing a databind as shown in my Sort command so
I'm completely at a loss as to what's wrong with my code. Yes, I am
desparate at this point.

Thanks for any and all help in this.

Jay
 
Dont sort the dataview, and Check how you are obtaining the dataview.
The best way I know is
1 Get the Currency manager for datagrid..
2 Get the Dataview from this currency manager.

Ex:
CurrencyManager cm = (CurrencyManager) datagrid.BindingContext[
Datasource, Datamember ];
DataView dv = (DataView) cm.List;

This way the data view should work properly... and current index get always
from "cm.Position" property
and dont sort these things.


Regards,
Sanjeeva,
Proteans Software Solutions
Bangalore, India.
 
Thanks for your reply Sanjeeva,

It appears the Currency Manager is only for winforms, I'm using asp.net web
forms. Is there an equivalent?


Sanjeeva said:
Dont sort the dataview, and Check how you are obtaining the dataview.
The best way I know is
1 Get the Currency manager for datagrid..
2 Get the Dataview from this currency manager.

Ex:
CurrencyManager cm = (CurrencyManager) datagrid.BindingContext[
Datasource, Datamember ];
DataView dv = (DataView) cm.List;

This way the data view should work properly... and current index get always
from "cm.Position" property
and dont sort these things.


Regards,
Sanjeeva,
Proteans Software Solutions
Bangalore, India.


Jason said:
I have a dataadapter that fills a dataset in an asp.net web application. A
DataGrid then pulls data from a dataview whose source is the dataset. All
of this works great.

When I click on 'edit' in the datagrid it returns the proper record (proper
primary key value of the record I'm editing). However, if I sort the
datagrid (via the built-in sorting headers) then click on 'edit' it returns
the original record, not the record now in the sorted place in the datagrid.
That is, if I have a datagrid displaying:

ID Name
================
9 George
3 Jane
6 Harry

and click on any ID it returns the proper index (ie. 9 or 3 or 6) --This is
working as it should. If I sort the data however,(by clicking on 'ID') and
get

ID Name
================
3 Jane
6 Harry
9 George

and click on '3' I always get ID=9 back which is the orginal value of that
index.

I'm sorting the data through a dataview with the following code:

Private Sub DataGrid1_SortCommand(ByVal source As Object, ByVal e As
System.Web.UI.WebControls.DataGridSortCommandEventArgs) Handles
DataGrid1.SortCommand

dvwParam.Sort = e.SortExpression

DataGrid1.DataSource = dvwParam

DataGrid1.DataBind()

End Sub

and when the a specific ID is click I'm getting that value by:

Private Sub DataGrid1_EditCommand(ByVal source As Object, ByVal e As
System.Web.UI.WebControls.DataGridCommandEventArgs) Handles
DataGrid1.EditCommand

'This is the value of the cell(1) a.k.a. ID in the datagrid

propChange_ID = CType(e.Item.Cells(1).Text, String)

End Sub

Am I missing a critical step to sync the dataview with the underlying
datagrid somehow? I'm performing a databind as shown in my Sort command so
I'm completely at a loss as to what's wrong with my code. Yes, I am
desparate at this point.

Thanks for any and all help in this.

Jay
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