无法读取Excel工作表

真奇怪，我正在尝试使用数据读取器访问Excel工作表，但遇到错误，无法弄清楚。想知道是否有人遇到过同样的问题。

Microsoft Office Access数据库引擎找不到对象“ SHEETNAME”。确保对象存在，并且正确拼写了它的名称和路径名

var str = new StringBuilder();

        using (var myConnection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=foreignkeys.xlsx;Extended Properties='Excel 8.0;HDR=Yes'"))
        {
            using (var myCommand = new OleDbCommand())
            {
                myConnection.Open();
                myCommand.Connection = myConnection;
                myCommand.CommandText = "select TableName, ColumnName from [SHEETNAME]";

                using (var dr = myCommand.ExecuteReader())
                {
                    while (dr.Read())
                    {
                        var tableName = dr["TableName"].ToString();
                        var columnName = dr["ColumnName"].ToString();
                        var tmp = columnName;
                        tmp = tmp.Replace("ID", "").Replace("Id", "");

                        str.AppendLine(string.Format("IF NOT EXISTS ( SELECT 1 FROM sys.foreign_keys AS FK WHERE name = 'FK_{0}_{1}' AND parent_object_id = OBJECT_ID('{2}'))", tableName, tmp, tableName));
                        str.AppendLine("BEGIN");
                        str.AppendLine(string.Format("ALTER TABLE dbo.{0} WITH CHECK", tableName));
                        str.AppendLine(string.Format("ADD CONSTRAINT FK_{0}_{1} FOREIGN KEY ({2}) REFERENCES dbo.{3}({4})", tableName, tmp, columnName, tmp, columnName));
                        str.AppendLine("END");
                        str.AppendLine("");
                        str.AppendLine("");
                    }
                }                    
            }
        }
        return str.ToString();