Cách nhập dữ liệu từ VB vào Access (1)

Toi muon lap trinh bang VB de nhap du lieu cho mot table trong Access. Cu the la toi co lam mot form co chua cac textbox de nhap du lieu, xin cac anh chi cho huong dan lam the nao de dua du lieu trong cac textbox do vao mot table trong Access theo cac truong tuong ung. Mong cac anh chi hoi am som. Cam on rat nhieu!

Nguyen Dai An

Hồi âm:

Em men!
Anh that su van chua hieu ro ve cau hoi cua em dua ra. Em nhap du lieu gi vay? Anh da viet thu tu tung phan lien ket giua lap trinh VB va Database de chi dan cach thuc duoi day cho em tham khao them. Vay em lam theo cach huong dan duoi day:

1. Cau tao mot ASCII text file de dung trong thi du nay. Neu em chua co cau tao san the text file, em co the bo qua buoc thu 5 -- Ngoai tru loading Grid1 with data from your text file.
2.Tang them three command buttons and two grid controls (GRID.VBX) to Form1.
3. Dung theo bang chi dan duoi day, dat the properties of the controls ma em da tang them o buoc thu 2.
Control Property New Value
--------------------------------------------------------------------
Command1 Caption "Press to Build Text File and Display in Grid"
Command2 Caption "Press to Transfer Data and Build New DB"
Command3 Caption "Press to Display the Data of the New Database"
Grid1 Cols 5
Grid1 Rows 35
Grid2 Cols 5
Grid2 Rows 35
4.Tang them code toi the (general) section of Form1:
Dim nums(30) As Long
Dim names(30) As String * 20
Dim addresses(30) As String * 25
Dim ss_nums(30) As String * 12
Const DB_LONG = 4
Const DB_TEXT = 10
Const DB_LANG_GENERAL = ";LANGID=0x0809;CP=1252;COUNTRY=0"
5.Tang them code toi the Form load event procedure:
Sub Form_Load ()
Show
grid1.ColWidth(1) = 1000 "For Emp ID
grid1.ColWidth(2) = 2000 "For Emp Name
grid1.ColWidth(3) = 3000 "For Emp Addr
grid1.ColWidth(4) = 2000 "For Emp SSN
grid1.Col = 1
grid1.Row = 0
grid1.Text = "Emp ID"
grid1.Col = 2
grid1.Row = 0
grid1.Text = "Emp Name"
grid1.Col = 3
grid1.Row = 0
grid1.Text = "Emp Addr"
grid1.Col = 4
grid1.Row = 0
grid1.Text = "Emp SSN" grid2.ColWidth(1) = 1000
grid2.ColWidth(2) = 2000
grid2.ColWidth(3) = 3000
grid2.ColWidth(4) = 2000
grid2.Col = 1
grid2.Row = 0
grid2.Text = "Employee ID"
grid2.Col = 2
grid2.Row = 0
grid2.Text = "Employee Name"
grid2.Col = 3
grid2.Row = 0
grid2.Text = "Employee Addr"
grid2.Col = 4
grid2.Row = 0
grid2.Text = "Employee SSN"
End Sub
6.Tang them code toi the Command1 click event procedure:
Sub Command1_Click ()
For i% = 1 To 30
nums(i%) = i%
names(i%) = "John Doe # " + Str$(i%)
addresses(i%) = Str$(i%) + " Mocking Bird Lane"
If i% < 9 Then
"* Enter the following four lines as one, single line:
ss_nums(i%) = Trim$(Str$(i%) + Trim$(Str$(i%))
+ Trim$(Str$(i%)) + "-" + Trim$(Str$(i% + 1))
+ Trim$(Str$(i% + 1)) + "-" + Trim$(Str$(i%))
+ Trim$(Str$(i%)) + Trim$(Str$(i%)) + Trim$(Str$(i%)))
Else
"* Enter the following two lines as one, single line:
ss_nums(i%) = Trim$(Trim$(Str$(999)) + "-" + Trim$(Str$(88))
+ "-" + Trim$(Str$(7777)))
End If
Next i%
Open "Testdata.DAT" For Output As #1
For j% = 1 To 30
Print #1, nums(j%)
Print #1, names(j%)
Print #1, addresses(j%)
Print #1, ss_nums(j%)
Next j%
Close #1
For i% = 1 To 30
grid1.Col = 1
grid1.Row = i%
grid1.Text = nums(i%) "Load Emp IDs
grid1.Col = 2
grid1.Row = i%
grid1.Text = names(i%) "Load Emp Names
grid1.Col = 3
grid1.Row = i%
grid1.Text = addresses(i%) "Load Emp Addrs
grid1.Col = 4
grid1.Row = i%
grid1.Text = ss_nums(i%) "Load Emp SSNs
Next i%
End Sub
7.Tang them code toi the Command2 click event procedure:
Sub Command2_Click ()
Dim newdb As Database
Dim newtb As Table
Dim newtd As New tabledef
Dim newidx As New Index
Dim field1 As New field "For Emp nums
Dim field2 As New field "For Emp names
Dim field3 As New field "For Emp addresses
Dim field4 As New field "For Emp ss_nums
screen.MousePointer = 11 "Display the time to build
Set newdb = CreateDatabase("NEWDB.MDB", DB_LANG_GENERAL)
newtd.Name = "Emp_Table" "* New table name
field1.Name = "Emp_ID" "* Holds Employee ID nums()
field1.Type = DB_LONG
newtd.Fields.Append field1
field2.Name = "Emp_Name" "* Holds Emp names()
field2.Type = DB_TEXT
field2.Size = 20
newtd.Fields.Append field2
field3.Name = "Emp_Addr" "* Holds Employee addr()
field3.Type = DB_TEXT
field3.Size = 25
newtd.Fields.Append field3
field4.Name = "Emp_SSN" "* Holds emp ss_nums()
field4.Type = DB_TEXT
field4.Size = 12
newtd.Fields.Append field4
newidx.Name = "Emp_ID_IDX" "* You have to have an index
newidx.Fields = "Emp_ID"
newidx.Primary = True
newtd.Indexes.Append newidx
newdb.TableDefs.Append newtd
Set newtb = newdb.OpenTable("Emp_Table")
Open "Testdata.dat" For Input As #1
BeginTrans
Do While Not (EOF(1))
newtb.AddNew
Line Input #1, tmp1$ "Retrieve empl_id
Line Input #1, tmp2$ "Retrieve empl_name
Line Input #1, tmp3$ "Retrieve empl_addr
Line Input #1, tmp4$
newtb("Emp_ID") = Trim$(tmp1$) "Place in field1
newtb("Emp_Name") = Trim$(tmp2$) "Place in field2
newtb("Emp_Addr") = Trim$(tmp3$) "Place in field3
newtb("Emp_SSN") = Trim$(tmp4$) "Place in field4
newtb.Update "Save to table
Loop
CommitTrans
Close #1 "Close text file
newtb.Close "Close DB"s table
newdb.Close "Close DB
screen.MousePointer = 0 "Set back to show done
End Sub
8.Tang them code toi the Command3 click event procedure:
Sub Command3_Click ()
Dim db As Database
Dim t As Table
Dim counter%
Set db = OpenDatabase("NEWDB.MDB")
Set t = db.OpenTable("Emp_Table")
counter% = 1 "Start counter at Row=1
Do Until t.EOF
grid2.Col = 1
grid2.Row = counter%
grid2.Text = t(0) "Load Emp ID
grid2.Col = 2
grid2.Row = counter%
grid2.Text = t(1) "Load Emp Name
grid2.Col = 3
grid2.Row = counter%
grid2.Text = t(2) "Load Emp Addr
grid2.Col = 4
grid2.Row = counter%
grid2.Text = t(3) "Load Emp SSN
counter% = counter% + 1
t.MoveNext
Loop
t.Close
db.Close
End Sub
9.Tu the Run menu, em chon Start (ALT, R, S), hoac nhan phim F5 to run chuong trinh nay. Dau tien em nhan vao nut the Command1. Sau do nhan vao nut the Command2 button, va roi nhan vao nut the Command3 button de so sanh cac ket qua. Chuc em vui ve!

Phucusa