c#写的学生管理系统的心得1

1.html文件中引入另一个html文件，用 #parse("../include/header.htm")，最好不要用这种形式的

2.需要连接数据库和导入sqlhelper(数据库里边的一些方法)和引用Nvelocity(渲染html页面)

连接数据库需要在web.config中配置：

            --stuentsystem数据库名称
 

3.可以往Data存多个数据：

                    DataTable dt = SqlHelper.ExecuteDataTable("select * from class where CLASS_ID=@CLASS_ID", new SqlParameter("@CLASS_ID", id));
                    DataTable dts = SqlHelper.ExecuteDataTable("select * from teacher");
                    var Data = new { team = dt.Rows[0], teachers=dts.Rows};
                    string html = CommonHelper.RenderHtml("editteam.html", Data);
                    context.Response.Write(html);

相应的前台可以通过$Data.team和$Data.teachers调用

4.比如班级（班级表中）里边得到所有的班主任老师名称（在另一个数据表teacher中）  添加页面

相当于遍历老师表：

前台：
                    
                请选择
                   #foreach($p in $Data.teachers)                 
                  $p.NAME     
                  #end                        
               
             

后台（需要得到teachers）：

              DataTable dt = SqlHelper.ExecuteDataTable("select * from teacher");
                var Data = new { teachers = dt.Rows };
                string html = CommonHelper.RenderHtml("addteam.html", Data);
                context.Response.Write(html);

5.编辑页面    显示已经选择的老师名称，并且遍历

前台：

          
              班主任老师
             
               
                 #foreach($p in $Data.teachers)
                        #if($Data.team.TEACHER_ID == $p.TEACHER_ID)        --班级里的老师ID和教师表里的id一致的时候，显示老师名称；否则显示所有的老师名称
                        $p.NAME
                        #else
                        $p.NAME
                        #end
                 #end            
               
             
           

后台：需要得到当前编辑的班级和教师列表

                  DataTable dt = SqlHelper.ExecuteDataTable("select * from class where CLASS_ID=@CLASS_ID", new SqlParameter("@CLASS_ID", id));
                    DataTable dts = SqlHelper.ExecuteDataTable("select * from teacher");
                    var Data = new { team = dt.Rows[0], teachers=dts.Rows};
                    string html = CommonHelper.RenderHtml("editteam.html", Data);
                    context.Response.Write(html);

6.模糊查询：

 DataTable dt = SqlHelper.ExecuteDataTable("select * from class_teacher where C_NAME like @C_NAME", new SqlParameter("@C_NAME", "%" + searchText + "%"));                                                                                                                                                                                                     --searchText为输入框的name

好了，现在就这么多吧，别的问题暂时还没怎么遇到呢