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问题描述
大家好吧,
im试图运行我的代码,但它给我一个错误。不允许更改connectionstring属性。连接''当前状态是开放的如何解决这个错误?
以下是我的代码..
hi all,
i m trying to run my code but it give me an error."Not allowed to change the"connectionstring property".The connection''s current state is open " how to solve this error??
below is my code..
1 Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5. Click
2 Try
3 Dim file_name As String = "E:\EXPORTDATA\customerInformation.txt"
4 Dim txtline, q, data(4) As String
5
6
7 If System.IO.File.Exists(file_name) = True Then
8 Dim objreader As New System.IO.StreamReader(file_name)
9 Do While objreader.Peek <> -1
10 ' Storing line to string variable
11 txtline = objreader.ReadLine() & vbNewLine
12 'breaking the line & stroing to array variable
13 data = txtline.Split(",")
14 q = "insert into customer_info values(@CUSTOMER_NAME,@CUSTOMER_ID,@CUSTOMER_ADD,@CITY)"
15 con.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=E:E\connectivity\MYDB.accdb;"
16
17 con.Open()
18
19 cmd = New OleDbCommand(q, con)
20 cmd.Connection = con
21
22 With cmd.Parameters
23 .Add("@CUSTOMER_NAME", OleDbType.VarChar).Value = data(0)
24 .Add("@CUSTOMER_ID", OleDbType.VarChar).Value = data(1)
25 .Add("@CUSTOMER_ADD", OleDbType.VarChar).Value = data(2)
26 .Add("@CITY", OleDbType.VarChar).Value = data(3)
27
28 End With
29 cmd.ExecuteNonQuery()
30 con.Close()
31 Loop
32 End If
33
34 MessageBox.Show("Data Saved")
35
36 Catch ex As Exception
37 MsgBox(ex.Message.ToString)
38 End Try
39
40 End Sub
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