Getting row not in table exception: This row has been removed from a table and does not have any data.BeginEdit() will allow creation of new data in this row

Hi

I have never seen this exception before and iam stucked with how to resolve this...?
Can anyone guide how i can fix this?
public decimal Sum
        {
            get
            {
                decimal mySum = 0;

                foreach( DsReconItems.MatchItemRow row in reconcileRows )
                {
                    mySum += row.Amount;   GETTING EXCEPTION HERE
                }

                return mySum;
            }
        }

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AdnanAsked:
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AdnanAuthor Commented:
i have 2 tab...one Search transactions tab, and one open transaction...when i search for some transactions and get the result, and then i switch to open transaction tab and back again i get this exception....it seems like the datatable get empety or something when i switch between two tabs... ???!
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saraganiCommented:
Which UI are you working with (Winforms, WPF?)

I know for sure on WPF that when you switch tabs, the UI of the old tab get unloaded and when you return back to it, it reloads.


I can't understand the whole logic of your code without seeing it, but it must be something with the Load event.
(I can assume that you load your DsReconItems.MatchItemRow on your Load event of the UserControl/UI which is located inside the tab, am I right?)
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AdnanAuthor Commented:
hi


yes man,i load my DsReconItems.MatchItemRow on Load event of the UserControl, wich is located inside the tab...????!
and iam working with WinForms, WPF!
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AdnanAuthor Commented:
here is my code where i call tab_click event....

and at this line i call to function decimal Sum function where i get error...code above...
private void tabSrch_Click(object sender, EventArgs e)
        {
            if (showReconciled)
            {
                ReconManuallyGridView.Visible = true;
                btnReconcile.Text = GetValue("reconcile");
                ClearLeftRightPage();
                SetSelectedTab(tabButtonOpenItems);
                ShowReconciled();
            }
            if (manRecon.Diff != 0)
            {
                searchControl1.ClearControls();
                searchControl1.searchTextDecimalFieldAmount.TextBox.Text = manRecon.Sum.ToString();  I CALL TO DECIMAL Sum FUNCTIUN here....
            }

            SetSelectedTab(tabSrch);
            //ReconManuallyGridView.SendToBack();
            searchControl1.SearchDb();

        }

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AdnanAuthor Commented:
if i change my code lines to:


                searchControl1.searchTextDecimalFieldAmount.TextBox.Text = manRecon.Sum.ToString();
                searchControl1.ClearControls();

The i stop getting this exception...but i want my data grid/dataset whatever to remeber those rows i had searched for before i swicthed to another tab and back again??!!! the state of the row is detached...?!
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saraganiCommented:
I'm not entirely familiar with your code, but maybe you can load the  DsReconItems.MatchItemRow once on the Load event of the Tab, and they check if it's already loaded before clearing it or creating a new instance of it.
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AdnanAuthor Commented:
oki the issue here was that i was clearing my dataset before so i get this message...i have resolved it by clearing ds after....
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