สอบถามเรื่องการแก้ไขเออเร่อ requested clipboard operation did not succeed

workBook = App.Workbooks.Add(misValue)
                Dim worksheet = workBook.ActiveSheet

                With WorkSheet

                    Dgv1.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableAlwaysIncludeHeaderText
                    Dgv1.SelectAll()

                    Dim str As String = TryCast(Dgv1.GetClipboardContent().GetData(DataFormats.UnicodeText), String)

                    Clipboard.SetText(str, TextDataFormat.UnicodeText)
                    '.Range("A1:" & ConvertToLetter(DGV1.ColumnCount) & DGV1.RowCount).Numberformat = "Text" 'set format excel.
                    .Range("A1:" & ConvertToLetter(Dgv1.ColumnCount) & Dgv1.RowCount, misValue).Select()
                    .Paste()
                    Clipboard.Clear()

                    
                End With