Datatable db=null;
DataTable dt = ds.Tables[0];
////两个datatable进行合并
db = dt.Copy();
DataRow[] foundRows = dt.Select();
for (int i = 0; i < foundRows.Length;i++)
{
db.ImportRow(foundRows[i]);
}
- //两个结构一样的DT合并
- DataTable DataTable1 = new DataTable();
- DataTable DataTable2 = new DataTable();
- DataTable newDataTable = DataTable1.Clone();
- object[] obj = new object[newDataTable.Columns.Count];
- for (int i = 0; i < DataTable1.Rows.Count; i++)
- {
- DataTable1.Rows[i].ItemArray.CopyTo(obj,0);
- newDataTable.Rows.Add(obj);
- }
- for (int i = 0; i < DataTable2.Rows.Count; i++)
- {
- DataTable2.Rows[i].ItemArray.CopyTo(obj,0);
- newDataTable.Rows.Add(obj);
- }
- //两个结构不同的DT合并
- /// <summary>
- /// 将两个列不同的DataTable合并成一个新的DataTable
- /// </summary>
- /// <param name="dt1">表1</param>
- /// <param name="dt2">表2</param>
- /// <param name="DTName">合并后新的表名</param>
- /// <returns></returns>
- private DataTable UniteDataTable( DataTable dt1 ,DataTable dt2 ,string DTName)
- {
- DataTable dt3 = dt1.Clone();
- for( int i = 0 ;i < dt2.Columns.Count ;i ++ )
- {
- dt3.Columns.Add( dt2.Columns[i].ColumnName ) ;
- }
- object[] obj = new object[dt3.Columns.Count];
- for (int i = 0; i < dt1.Rows.Count; i++)
- {
- dt1.Rows[i].ItemArray.CopyTo(obj,0);
- dt3.Rows.Add(obj);
- }
- if( dt1.Rows.Count >= dt2.Rows.Count )
- {
- for( int i = 0 ;i < dt2.Rows.Count ;i++ )
- {
- for( int j = 0 ;j < dt2.Columns.Count ;j ++ )
- {
- dt3.Rows[i][j+dt1.Columns.Count] = dt2.Rows[i][j].ToString() ;
- }
- }
- }
- else
- {
- DataRow dr3 ;
- for( int i = 0 ;i < dt2.Rows.Count - dt1.Rows.Count ;i ++ )
- {
- dr3 = dt3.NewRow() ;
- dt3.Rows.Add( dr3 ) ;
- }
- for( int i = 0 ;i < dt2.Rows.Count ;i++ )
- {
- for( int j = 0 ;j < dt2.Columns.Count ;j ++ )
- {
- dt3.Rows[i][j+dt1.Columns.Count] = dt2.Rows[i][j].ToString() ;
- }
- }
- }
- dt3.TableName = DTName ; //设置DT的名字
- return dt3 ;
- }
- //多个 结构相同的DataTable合并
- public DataTable GetAllEntrysDataTable()
- {
- DataTable newDataTable = GetEntrysDataTable(0).Clone();
- object[] obj = new object[newDataTable.Columns.Count];
- for (int i = 0; i < entryGroups.GetEntryGroupCount(); i++)
- {
- for (int j = 0; j < GetEntrysDataTable(i).Rows.Count; j++)
- {
- GetEntrysDataTable(i).Rows[j].ItemArray.CopyTo(obj, 0);
- newDataTable.Rows.Add(obj);
- }
- }
- return newDataTable;
- }