This is a migrated thread and some comments may be shown as answers.

first Row Deleting Problem

19 Answers 525 Views

GridView

This is a migrated thread and some comments may be shown as answers.

19 Answers, 1 is accepted

answered on 16 Jun 2008, 03:40 PM

Hi Rehan ,

I'm not sure I completely understand your scenario.

In Q1 2008, the event system of the RadGridView has been changed. In older versions, there were a variety of events for the different operations that can be performed on the data stored in the grid. These have been replaced by one event, which is raised with different event args.

This means that you will not have to place your code in the handler for a different event. Place all of the code you need to perform after a deletion of a row in the handler of the RowChanging event. You only need to verify that the event arguments indicate that a row has been deleted.

If you have any further questions, please contact me.

All the best,
Kiril
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

answered on 17 Jun 2008, 10:38 AM

dear i think you cant understand my Problem. ok let me give u the example code .

Private

Sub RadGridView1_RowsChanging(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCollectionChangingEventArgs) Handles RadGridView1.RowsChanging

''' MsgBox("step row changing")

If e.Action = Telerik.WinControls.Data.NotifyCollectionChangedAction.Remove Then

Dim cCancel As DialogResult

cCancel = MessageBox.Show(

"Are you sure you want to delete the selected row ?", SystemConfiguration.MessageTitle, MessageBoxButtons.YesNo, MessageBoxIcon.Question)

If cCancel = DialogResult.Yes Then

If Me.RadGridView1.Rows(CurrentRow).IsCurrent = False Or Me.RadGridView1.Rows(CurrentRow).Cells(ItemNumberColumn).Value.ToString() = "" Then

Else

UpdateITMTable.SubQtyInEachItemLine(Me.RadGridView1.Rows(CurrentRow).Cells(ItemNumberColumn).Value, Me.RadGridView1.Rows(CurrentRow).Cells(QuantityColumn).Value)

CurrentRowDeleted =

True

End If

Else

e.Cancel = True

End If

End Sub

this is wut i m doing behid the rowchanging event ... here if we have only 1 row ... row changing event will occured and i say yeah i want to delete the row and my code behind deletion do some calculations on grid rows count. if i call it here then rows will be still 1 as this event is in process.

the calculation code only needs to call at RowChanged Event as you ppl also mention that in Q1 2008

RowDeleting

/RowDeleted events have been replaced by RadGridView

RowsChanging

/RowsChanged events.

the only problem is that if we have only 1 row in gridview we cant be able to catch RowChanged Event.bt if we have more then one row it works f9.

answered on 18 Jun 2008, 01:41 PM

Hi Rehan ,

Excuse me for taking so long to resolve this issue. The issue you reported has been added to our TODO list and will be resolved in one of the future releases. For the time being, there's another method you can use to execute logic following the deletion of a row - subscribe to the ListChanged method the datasource of the grid control.

    
            this.radGridView1.DataSource = customersBindingSource;  
        
            customersBindingSource.ListChanged += new ListChangedEventHandler(customersBindingSource_ListChanged);

In the handler of this event, you can place the code below, to let you know when an item has been deleted:

    
            void customersBindingSource_ListChanged(object sender, ListChangedEventArgs e)  
        
            {  
        
                switch (e.ListChangedType)  
        
                {  
        
                    case ListChangedType.ItemDeleted:  
        
                        //your code here  
        
                        break;  
        
                }  
        
            }

I hope this helps. If you have further questions, please let me know.

Regards,
Kiril
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

answered on 15 Aug 2008, 02:59 PM

Hello David,

Thank you for this question.

I confirm that in the latest release of RadGridView the RowsChanged event isn't fired when there is only one row. This issue will be addressed in our upcoming service pack.

To work around the issue you could process the RowChanging event instead. Consider the code below:

    
            void radGridView1_RowsChanging(object sender, GridViewCollectionChangingEventArgs e) 
        
            { 
        
                if (e.Action == NotifyCollectionChangedAction.Remove) 
        
                { 
        
                } 
        
            }

I hope this helps you. Please let me know if you need further assistance.

Regards,
Jack
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 09 Jun 2010, 06:51 PM

I have this problem to I am using the version 2010 Sp1.

I try to Delete the first row and after delete the row present a error say: Index 0 is either negative or above rows count.,

Private Sub rgvWidth_RowsChanging(ByVal sender As System.Object, ByVal e As Telerik.WinControls.UI.GridViewCollectionChangingEventArgs) Handles rgvWidth.RowsChanging

Try

Select Case e.Action

Case Telerik.WinControls.Data.NotifyCollectionChangedAction.Remove

If CType(e.OldItems(0), GridViewDataRowInfo).Cells("Id").Value <> 0 Then

' Delete the row in the data base and reload all the Data

RemoveMatedSetWidth(CType(e.OldItems(0), GridViewDataRowInfo).Cells("Id").Value)

End If

End Select

Catch ex As Exception

rgvWidth.CancelEdit()

MsgBox(ex.Message, MsgBoxStyle.Exclamation, "Samtec Product Data Base")

LoadMatedSetWidth()

End Try

End Sub

Product Bundles

DevCraft

Web

Mobile

Document Management

Desktop

Reporting & Mocking

Automated Testing

CMS

UI/UX Tools

Debugging

Free Tools

Support and Learning

Productivity and Design Tools

first Row Deleting Problem

19 Answers, 1 is accepted