使用vb.net和Ms Access在DatagridView中显示多个表

Question

你好家伙我遇到了这个问题。我想要在Access数据库中获取我的5表的值，并将其放到单个DatagridView中。这是我的代码..我在我的表中获取值，并且希望它在DataGridView中显示.. 在此先感谢。

“代码

 If cmbGradelevel.Text = "All" Then 
     Dim da As New OleDb.OleDbDataAdapter("SELECT Number_001 as [Number],StudentID_001 as [Student Number], " & _ 
              "LastName_001 as [Last Name],FirstName_001 as [First Name], " & _ 
              " MiddleName_001 as [Middle Name], Address_001 as [Address], " & _ 
              "Age_001 as [Age], Gender_001 as [Gender]" & _ 
              " FROM grade1 ORDER BY Number_001", con) 

     con.Close() 

     ' 
     Dim da2 As New OleDb.OleDbDataAdapter("SELECT Number_002 as [Number],StudentID_002 as [Student Number], " & _ 
           "LastName_002 as [Last Name],FirstName_002 as [First Name], " & _ 
           " MiddleName_002 as [Middle Name], Address_002 as [Address], " & _ 
           "Age_002 as [Age], Gender_002 as [Gender]" & _ 
           " FROM grade2 ORDER BY Number_002", con) 

     con.Close() 
     ' 
     Dim da3 As New OleDb.OleDbDataAdapter("SELECT Number_003 as [Number],StudentID_003 as [Student Number], " & _ 
           "LastName_003 as [Last Name],FirstName_003 as [First Name], " & _ 
           " MiddleName_003 as [Middle Name], Address_003 as [Address], " & _ 
           "Age_003 as [Age], Gender_003 as [Gender]" & _ 
           " FROM grade3 ORDER BY Number_003", con) 
     con.Close() 
     ' 

     Dim da4 As New OleDb.OleDbDataAdapter("SELECT Number_004 as [Number],StudentID_004 as [Student Number], " & _ 
           "LastName_004 as [Last Name],FirstName_004 as [First Name], " & _ 
           " MiddleName_004 as [Middle Name], Address_004 as [Address], " & _ 
           "Age_004 as [Age], Gender_004 as [Gender]" & _ 
           " FROM grade4 ORDER BY Number_004", con) 
     con.Close() 
     ' 
     Dim da5 As New OleDb.OleDbDataAdapter("SELECT Number_005 as [Number],StudentID_005 as [Student Number], " & _ 
              "LastName_005 as [Last Name],FirstName_005 as [First Name], " & _ 
              " MiddleName_005 as [Middle Name], Address_005 as [Address], " & _ 
              "Age_005 as [Age], Gender_005 as [Gender]" & _ 
              " FROM grade5 ORDER BY Number_005", con) 
     con.Close() 
     ' 
     Dim da6 As New OleDb.OleDbDataAdapter("SELECT Number_006 as [Number],StudentID_006 as [Student Number], " & _ 
           "LastName_006 as [Last Name],FirstName_006 as [First Name], " & _ 
           " MiddleName_006 as [Middle Name], Address_006 as [Address], " & _ 
           "Age_006 as [Age], Gender_006 as [Gender]" & _ 
           " FROM grade6 ORDER BY Number_006", con) 
     con.Close() 


    Dim dt as new DataTabe 

    'Now I want to get da,da2,da3,da4,da5,da6 value and fill it to datatable 

    'example. da & da2 & da3 & da4 & da5 & da6.Fill(dt) 

    'but you cant fill datatable with many data adapter.. 
    'is there a way to display multiple table in single DataGridView? 

Answer 1

如何一次全部运行的SQL。只需在每个人之间添加“union all”。 下面是两个表的一个例子加盟：

"SELECT Number_001 as [Number],StudentID_001 as [Student Number], " & _ 
" LastName_001 as [Last Name],FirstName_001 as [First Name], " & _ 
" MiddleName_001 as [Middle Name], Address_001 as [Address], " & _ 
" Age_001 as [Age], Gender_001 as [Gender]" & _ 
" FROM grade1 ORDER BY Number_001" & _ 
" UNION ALL SELECT Number_002 as [Number],StudentID_002 as [Student Number], " & _ 
" LastName_002 as [Last Name],FirstName_002 as [First Name], " & _ 
" MiddleName_002 as [Middle Name], Address_002 as [Address], " & _ 
" Age_002 as [Age], Gender_002 as [Gender]" & _ 
" FROM grade2 ORDER BY Number_002"