Problem in linking Oracle XE to visual studio 2017 c#

Question

I connected to a database.Then i dragged and dropped a table to a form.When I edited the data from data sheet and saving the form iam getting,

 

System.InvalidOperationException

HResult=0x80131509

Message=Update requires a valid UpdateCommand when passed DataRow collection with modified rows.

Source=SRB_SHOPS

StackTrace:

at SRB_SHOPS.DataSet3TableAdapters.TableAdapterManager.UpdateAll(DataSet3 dataSet) in D:\Accounts\SRB_SHOPS\SRB_SHOPS\DataSet3.Designer.cs:line 1972

at SRB_SHOPS.Form2.tABLE2BindingNavigatorSaveItem_Click(Object sender, EventArgs e) in D:\Accounts\SRB_SHOPS\SRB_SHOPS\Form2.cs:line 35

at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)

at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)

at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)

at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)

at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)

at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)

at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)

at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at System.Windows.Forms.ToolStrip.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)

at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.Run(Form mainForm)

at SRB_SHOPS.Program.Main() in D:\Accounts\SRB_SHOPS\SRB_SHOPS\Program.cs:line 19

 

What should I do ?