Question

我有3个表，我从（ModuleStaff，Staff，Roles检索。我打算做的是在一行中的gridview中显示数据。例如，负责组号1和2的staff(adrian)将显示为：

StaffName |  RoleName |  GroupNumber

Adrian    |  Lecturer |  1,2

目前，我遇到的问题是同一个staff(adrian)，但使用不同的角色名称，即使其数据库数据对于导师和领导者空白

我现在得到了什么：

groupnumbers (1 and 2)

应该是什么：

StaffName |  RoleName |  GroupNumber

Adrian    |  Lecturer |  1,2

Adrian    |  Tutor    |  1,2

Adrian    |  Leader   |  1,2

这是我的代码：

StaffName |  RoleName |  GroupNumber

Adrian    |  Lecturer |  1,2

Adrian    |  Tutor    |  

Adrian    |  Leader   |

我不太清楚我应该如何查询XML Path / sql语句，以便根据public DataTable DisplayModuleStaffGroup(string year, string module, string diploma) { try { using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MARSConnectionString"].ConnectionString)) { using (SqlCommand cmd = con.CreateCommand()) { cmd.CommandText = "SELECT ms.ModuleCode, ms.ModuleYear, ms.DiplomaID, sr.RoleName, s.StaffName, s.StaffStatus, GroupNumber = "; cmd.CommandText += " substring((SELECT ( ', ' + GroupNumber ) FROM ModuleStaff ms2, Staff s2 "; cmd.CommandText += " WHERE ms.StaffID = ms2.StaffID AND ms2.StaffID = s2.StaffID "; cmd.CommandText += " ORDER BY s2.StaffName, ms2.GroupNumber "; cmd.CommandText += " FOR XML PATH( '' )), 3, 1000) "; cmd.CommandText += " FROM ModuleStaff ms "; cmd.CommandText += " INNER JOIN StaffRoles sr ON ms.RoleID = sr.RoleID "; cmd.CommandText += " INNER JOIN Diploma d ON ms.DiplomaID = d.DiplomaID "; cmd.CommandText += " INNER JOIN Staff s ON ms.StaffID = s.StaffID "; cmd.CommandText += " WHERE (ms.DiplomaID = @dip) AND (ms.ModuleYear = @year) AND (ms.ModuleCode = @code) "; cmd.CommandText += " ORDER BY ms.RoleID DESC "; cmd.Parameters.AddWithValue("@dip", diploma); cmd.Parameters.AddWithValue("@year", year); cmd.Parameters.AddWithValue("@code", module); DataSet dSet = new DataSet(); using (SqlDataAdapter da = new SqlDataAdapter(cmd)) { da.Fill(dSet, "DisplayModuleStaffGroup"); return dSet.Tables["DisplayModuleStaffGroup"]; } } } } catch { throw; } finally { } }和rolename为我提供组号。谁可以帮我这个事？谢谢。

Answer 1

你可以在sql中完成循环.. 这是你可以申请的想法

declare @totalStaff int
declare @totalRoles int
declare @staffCount int
declare @roleCount int
declare @staffId int
declare @staffName varchar(max)
declare @roleId int
declare @roleName varchar(max)
declare @groupCount int
declare @table table(staffName varchar(max),roleName varchar(max),roles varchar(max))

set @staffCount=1
set @roleCount=1
set @totalStaff=(select count(*) from staff)

while(@staffCount<=@totalStaff)
begin
   set @staffId=select a.ID from
                  (select row_number() over(order by ID) as sr,ID from satff)a
           where a.sr=@staffCount
    set @staffName=(select staffName from staff where staffId=@staffId)
    set @totalRoles=(select count(*) from roles where staffId=@staffId)
    while(@roleCount<=@totalRoles)
    begin
    set @roleId=select a.ID from
                (select row_number() over(order by ID) as sr,ID from roles)a
                where a.sr=@roleCount
    set @roleName=(select roleName from roles where roleId=@roleId)
     --now same as above go through the loop for group 
    end
end

SQL查询 - 如何使用gridview的XML路径查询显示单行

1 个答案: