DataTable dataTableDistinct = dataTable.DefaultView.ToTable(true,"FieldName1","FieldName2","...");
//注：其中ToTable（）的第一个参数为是否DISTINCT
DataTable dataTableDistinct = dataTable.DefaultView.ToTable(true,"FieldName1","FieldName2","...");
//注：其中ToTable（）的第一个参数为是否DISTINCT