Gridview data not refreshing

Question

I have a gridview which has a List (Of MyObject) as its datasource.

gv.DataSource = MyListObject
gv.Databind()

Under a templatefield i have a button configured to delete a record from MyListObject and then rebind it. To add a record i have the below code

Protected Sub btnAddRecord_Click(sender As Object, e As EventArgs) Handles btnAddRecord.Click
    Dim Customer As New Customer

    With Customer
        .Name = txtName.Text
        .Surname = txtSurname.Text
        .....
        .ID += MyListObject.Count
    End With

    MyListObject.Add(Customer)

    gv.DataSource = MyListObject 
    gv.DataBind()
End Sub

This works fine, but then i need to allow the user to delete a record if need be:

Private Sub gv_RowCommand(sender As Object, e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles gv.RowCommand
    If e.CommandName = "Delete" Then
        MyListObject.RemoveAt(e.CommandArgument)

        gv.DataSource = Nothing
        gv.DataBind()

        gv.DataSource = MyObjectList
        gv.DataBind()

        upnl.UpdateMode = UpdatePanelUpdateMode.Conditional
        upnl.Update()
    End If
End Sub

When i click the button it deletes the record but doesnt refresh the data. By that i mean when the record is added i am assigning the ID as a row ID and then use that ID to remove the record. Since the List and Gridview values are now out of sync i set the datasource to nothing and rebind it in order that i was going to have the values reset and the ID would be the correct one - but this doesnt works as i expected.

Could anyone advise where im going wrong and how to correct this problem?

In your gv_RowCommand function, this line: gv.DataSource = _DirectorAddList is actually referring to the MyListObject I'm guessing? gv.DataSource = MyListObject — Cortright
Remove the update panel and do normal page refresh to see if you get the desired results. That way you can pinpoint the proper reason. — gmail user
Removing the update panels seems to point at my code, but im a little lost where the bug could be? MyListObject is a Shared private variable but if it isnt then it only remembers the last item added to the gridview? — Computer
Or if possible how could i get the RowIndex under the RowCommand event? — Computer

gmail user gmail user · Accepted Answer · 2013-04-08T18:13:30

1

votes

Is gridview in the updatepanel? If yes, that panel should also be refreshed.

Gridview data not refreshing

3 Answers