小编bra*_*art的帖子

我有一个填充了两个表的DataSet:

dbSet = new DataSet();
//DataTable and DataRelation
DataTable dtStudent = new DataTable("Student");


//fill datatable 1
dtStudent.Columns.Add("Id", typeof(int));
dtStudent.Columns.Add("Name", typeof(string));
dtStudent.Columns.Add("TownId", typeof(int));

dtStudent.Rows.Add(new object[] { 1, "Arthur", 1 });
dtStudent.Rows.Add(new object[] { 2, "Stefan", 2 });


DataTable dtTown = new DataTable("Town");
dtTown.Columns.Add("Id", typeof(int));
dtTown.Columns.Add("Name", typeof(string));

dtTown.Rows.Add(new object[] { 1, "KW",});
dtTown.Rows.Add(new object[] { 2, "Perg", });

dbSet.Tables.Add(dtStudent);
dbSet.Tables.Add(dtTown);

然后我有这两个表的DataRelation.所以我想用他的身份证,姓名和他的镇名来打印学生.这就是我创建DataRelation的原因.

//DataRelation
DataColumn parentCol, childCol;
childCol = dbSet.Tables["Town"].Columns["Id"];
parentCol = dbSet.Tables["Student"].Columns["TownId"];

DataRelation dr;
dr = new DataRelation("DataRelation", parentCol, childCol);

dbSet.Relations.Add(dr); …