datagridview的数据源未得到更新

我绑定DataGridView的DataSource属性，并使用DataAdaptor更新它，以及它的工作。现在我正试图将Excel文件中的DataSource与DataGridView的DataSource合并，并将这些合并DataSource保存在数据库中，2个数据源正在进行合并，但DataAdaptor无法更新数据库中的合并数据源，即使我在更新DataAdaptor时也没有遇到任何错误，以下是合并和保存DataSource 的代码

        //Code for Merging DataSources
        byte[] dataTable = GetExcelFileByteArray();
        //ExcelDataTable is of type DataTable
        ExcelDataTable = GetTableDataOfByteArrayOfExcel(dataTable);
        //dgvAllGridView is DataGridVIew
        DataTable _dgvDataTable = this.dgvAllGridView.DataSource as DataTable;
        if (!ExcelDataTable.Columns.Contains("ID"))
            ExcelDataTable.Columns.Add("ID", _dgvDataTable.Columns["ID"].GetType()).SetOrdinal(0);
        _dgvDataTable.Merge(ExcelDataTable, true, MissingSchemaAction.Ignore);
        dgvAllGridView.DataSource = _dgvDataTable;
        //Code for Updatating DataAdaptor
        //DataAdaptor is a OleDBDataAdaptor
        DataAdaptor.UpdateCommand = new OleDbCommandBuilder(DataAdaptor).GetUpdateCommand();
        DataAdaptor.InsertCommand = new OleDbCommandBuilder(DataAdaptor).GetInsertCommand();
        DataAdaptor.Update((DataTable)dgvAllGridView.DataSource);