Datagrid从源复制一个项目

Question

我有一个RIA服务，即返回学校列表并填充数据网格。此数据网格在整个网格中复制第一个结果，而不是在其自己的行中显示源中的每个项目。

服务如下

var schools1 = (from i in DataContext.PrevSchools
                       join skl in DataContext.SchoolLists on i.School_id equals skl.School_Id
                       where i.Email_Address == email
                       select new PreviousSchools
                                  {
                                      PrevSchoolsId = i.PrevSchools_id,
                                      AppEmail = i.Email_Address,
                                      SchoolId = i.School_id,
                                      DateAttended = i.YearsAttended,
                                      Study = i.Study, 
                                      Credit = i.Credit, 
                                      CompleteStatus = i.Complete_Status,  
                                      Award = i.Award, 
                                      SchoolName = skl.School_name
                                  }).Union(from i in DataContext.PrevSchools
                       join skl1 in DataContext.Schools on i.School_id equals skl1.School_id
                       where i.Email_Address == email && i.School_type_id == 1
                       select new PreviousSchools
                       {
                           PrevSchoolsId = i.PrevSchools_id,
                           AppEmail = i.Email_Address,
                           SchoolId = i.School_id,
                           DateAttended = i.YearsAttended,
                           Study = i.Study,
                           Credit = i.Credit,
                           CompleteStatus = i.Complete_Status,
                           Award = i.Award,
                           SchoolName = skl1.School_name
                       }).OrderBy(q => q.SchoolName);

        return schools1;

数据绑定是：

this.PrevSchools.prevSchoolDataGrid.DataContext = SchoolsList;

SchoolList是一个ObservableCollection，它被设置为一个列表，也是一个IEnumerable，它仍然产生了重复的结果。

Answer 1

修正了它，这是Model类中的一个错误，该键被设置为错误的属性