I am getting an error mentioned in title when i modify all ready saved values and when i press save button the error occurs in this code
Code:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Me.Validate()
        Me.ItemsBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me.ItemsDataSet)         


can any body please tell me how to solve the problem . i heard that by inserting sql command builder i can solve this problem but where to put that code.      :confused:
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