Could not find installable ISAM

程序中去读EXCEL文档，以前一直参考《

程序又可以跑起来了...

 public static string ExcelConnectionString(string filePhysicalPath)
        {
            string connectionString = string.Empty;
            string fileExtension = filePhysicalPath.Substring(filePhysicalPath.LastIndexOf(".") + 1);
            switch (fileExtension)
            {
                case "xls":
                    connectionString = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"", filePhysicalPath);
                    break;
                case "xlsx":
                    connectionString = String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 8.0;HDR=YES\"", filePhysicalPath);
                    break;
            }
            return connectionString;
        }

Source Code