... access, and modify data stored in an Excel workbook. The sample code contains two event handlers: Form.Load Creates an OleDbDataAdapter that uses the Jet OLE DB provider to access an Excel ... 1-2. Example 1-2. File: ExcelForm.cs // Namespaces, Variables, and Constants using System; using System.Configuration; using System.Data; private OleDbDataAdapter da; private DataTable ... OleDbCommand(updateSql, da.SelectCommand.Connection); da.UpdateCommand.Parameters.Add("@CategoryName", OleDbType.Char, 15, "CategoryName"); da.UpdateCommand.Parameters.Add("@Description",...