#region 读取Excel文件内容到DataSet中
         public static DataSet ReadExcel(string xlsPath)
         {
             // 读取Excel数据，填充DataSet
             // 连接字符串            
             string connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                             "Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\";" + // 指定扩展属性为 Microsoft Excel 8.0 (97) 9.0 (2000) 10.0 (2002)，并且第一行作为数据返回，且以文本方式读取
                             "data source=" + xlsPath + ";";
             string sql_F = "SELECT * FROM [{0}]";

             System.Data.OleDb.OleDbConnection conn = null;
             System.Data.OleDb.OleDbDataAdapter da = null;
             System.Data.DataTable tblSchema = null;
             IList<string> tblNames = null;

             // 初始化连接，并打开
             conn = new System.Data.OleDb.OleDbConnection(connStr);
             try
             {
                 conn.Open();
             }
             catch (Exception ex)
             {
                 throw ex;
             }
             // 获取数据源的表定义元数据                        
             //tblSchema = conn.GetSchema("Tables");
             tblSchema = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });

             //关闭连接
             conn.Close();

             tblNames = new List<string>();
             foreach (DataRow row in tblSchema.Rows)
             {
                 tblNames.Add((string)row["TABLE_NAME"]); // 读取表名
             }

             // 初始化适配器
             da = new System.Data.OleDb.OleDbDataAdapter();
             // 准备数据，导入DataSet
             DataSet ds = new DataSet();

             foreach (string tblName in tblNames)
             {
                 da.SelectCommand = new System.Data.OleDb.OleDbCommand(String.Format(sql_F, tblName), conn);
                 try
                 {
                     da.Fill(ds, tblName);
                 }
                 catch
                 {
                     // 关闭连接
                     if (conn.State == ConnectionState.Open)
                     {
                         conn.Close();
                     }
                     throw;
                 }
             }

             // 关闭连接
             if (conn.State == ConnectionState.Open)
             {
                 conn.Close();
             }
             return ds;
         }
         #endregion

------解决方案--------------------
探讨

OleDbDataAdapter oda = new OleDbDataAdapter("select * from [" + table_name + "]", myConnection);


------解决方案--------------------
那我想问你，你不用建数据库吗，你数据库字段也没确定？你筛选数据总有个条件吧，根据这些还不能确定？总之问题就这，你都写了select *  还不让空白列出来不是搞笑么，再看看吧