DataSet多表查询操作VIP专享

OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=HouseDB.mdb"); DataSet MySet = new DataSet(); OleDbDataAdapter MyAdapter = new OleDbDataAdapter(Query, con); MyAdapter.Fill(MySet, TableName); 一.源码及说明: 1using System; 2using System.Collections.Generic; 3using System.Data; 4 5namespace Andy.DataSetHelper 6{ 7 public class DataSetHelper 8 { 9 10 11 public DataSet ds; 12 13 private System.Collections.ArrayList m_FieldInfo; 14 private string m_FieldList; 15 16 public DataSetHelper(ref DataSet DataSet) 17 { 18 ds = DataSet; 19 } 20 public DataSetHelper() 21 { 22 ds = null; 23 } 24 ///

25 /// 该方法根据给定的字段列表(FieldList)和表名（TableName），创建表结构，并返回表对象 26 /// 给定的字段可来自创建了关系的两张表，如果是源表（子表）中的字段，直接写字段名即可。 27 /// 如果是关系表（父表）中的字段， 28 /// 字段前面须加上关系名称，格式如：relationname.fieldname 29 /// FieldList 语法：[relationname.]fieldname[ alias][,[relationname.]fieldname[ alias]] 30 ///

31 /// 生成新结构表的表名 32 /// 源表名（子表） 33 /// 生成新结构表的目标字段 34 /// 具有目标结构的表对象 35 public DataTable CreateJoinTable(string TableName, DataTable SourceTable, string FieldList) 36 { 37 if (FieldList == null) 38 { 39 throw new ArgumentException("You must specify at least one field in the field list."); 40 } 41 else 42 { 43 DataTable dt = new DataTable(TableName); 44 ParseFieldList(FieldList, true); 45 foreach (FieldInfo Field in m_FieldInfo) 46 { 47 if (Field.RelationName == null) 48 { 49 DataColumn dc = SourceTable.Columns[Field.FieldName]; 50 dt.Columns.Add(dc.ColumnName, dc.DataType, dc.Expression); 51 } 52 else 53 { 54 DataCo...