Gridview rowupdating old values
Now, the biggest problem with this child grid is that each and every event you to write manually because grid will lost it's binding when any command is get fired. Net1.1's datagrid child grid's handler will get called when any command of childgird get fired like Edit, Delete, Sorting, Paging. Net1.1 Data grid's Inner control's event will be first handled by Grid's Item Command event irrespective of whether that control is Data Grid, Button, List Box etc.But here it will not call the Row Command event of Master Grid it will directly call Row Command event of Child Grid. Now it will call Row Data Bound of Mastergrid here you will find the whether the Row State of particular Row is edit then you will find Child Grid with Edit and Delete Command in the Edit Tempalate of Template Column. When you press Edit Command of Child Grid it will Row Command of Child Grid unlike ASP.But this functionality is some what different in Grid View Control. I mean to say that in Grid View Control if you have added one template column having Grid View inside it and now if you select "Column Sorting" command then it will not call any event of Master grid.It will directly call the sorting handler of the child grid.We’ll start with binding data to the Grid View, then build up functionality from there.First, we’ll implement a method to databind the Grid View, which will be called whenever databinding needs to be performed. NET forums is how to deal with exceptions like The Grid View 'Grid View1' fired event Row Editing which wasn't handled.
And one thing I have found that if you did not write handler of edit, delete, update, sort, page command it will give error because when you press Edit Command of Child Grid it will find for the Row Editing Handler of child grid even if you are doing your all the activity in Row Command event. Here one thing is important is that in Row Command event of Child Grid you will get the old values in the grid means viewstate of the grid. We also need force databinding to occur when then page is loaded, which we’ll handle in Page_Load.The required actions for paging to work are setting the new page index, setting the Data Source, and calling Data Bind (the last two through the Bind Data method).We also want it to be something persistent, so that, for example, if you sort, then page, the sort is maintained.The way we’ll accomplish this is to create two properties that store those values in View State.
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The important point is not which of these two events call Bind Data, but one of them must or the Grid View will not be updated. When bound using a Data Source ID, the Grid View internally tracks the current Sort Expression and Sort Direction, and those are available through properties with the same names.