[英]ADODB Connection - Error: Data source name not found and no default driver specified
I never had problems connecting to Access DBs in the past using ODBC. 过去,使用ODBC连接到Access DB从未遇到问题。 Now I am trying to connect using ADO/OLEDB and I am getting this error (DSNless connection):
现在,我尝试使用ADO / OLEDB进行连接,并且出现此错误(DSNless连接):
System.Runtime.InteropServices.COMException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified. System.Runtime.InteropServices.COMException:[Microsoft] [ODBC驱动程序管理器]找不到数据源名称,也未指定默认驱动程序。
I am no longer using ODBC. 我不再使用ODBC。 As I said I am using ADO/OLEDB.
正如我所说的,我正在使用ADO / OLEDB。 Here's my code:
这是我的代码:
var conString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=d:\\test.mdb";
// I've also tried the one below, same error
// var conString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=d:\\test.mdb";
var con = new ADODB.Connection( conString );
// bombs here
con.Open();
I've looked at almost everything Google and this site has regarding this error with MS Access. 我已经查看了Google几乎所有内容,并且该站点上有关MS Access的此错误。 I've tried changing my projects back to 32-bit (x86).
我尝试将项目改回32位(x86)。 Nothing seems to work.
似乎没有任何作用。
Anyone have any ideas? 有人有想法么?
UPDATE: I need an ADODB connection because I am using ADOX which requires an ADODB connection. 更新:我需要一个ADODB连接,因为我正在使用需要ADODB连接的ADOX。
var cat = new Catalog();
// this line below will bomb for ODBC or OLEDB
cat.ActiveConnection = con;
Try making OLEDB connection. 尝试建立OLEDB连接。 Also please mention the output .
还请提及输出。
Imports System.Data.OleDb
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim connetionString As String
Dim cnn As OleDbConnection
connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=yourdatabasename.mdb;"
cnn = New OleDbConnection(connetionString)
Try
cnn.Open()
MsgBox("Connection Open ! ")
cnn.Close()
Catch ex As Exception
MsgBox("Can not open connection ! ")
End Try
End Sub
End Class
You need to provide the specific Driver Info While making the connection .Follow the Next code . 在建立连接时,您需要提供特定的驱动程序信息。
Imports System.Data.Odbc
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim connetionString As String
Dim cnn As OdbcConnection
connetionString = "Driver={Microsoft Access Driver (*.mdb)};DBQ=yourdatabasename.mdb;"
cnn = New OdbcConnection(connetionString)
Try
cnn.Open()
MsgBox("Connection Open ! ")
cnn.Close()
Catch ex As Exception
MsgBox("Can not open connection ! ")
End Try
End Sub
End Class
You have to install OLEDB drivers which required to make connection: 您必须安装进行连接所需的OLEDB驱动程序:
Connection string: 连接字符串:
<add name="ConnectionString" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source d:\\\\test.mdb;Persist Security Info=False;" />
Drivers can install from below link: http://www.microsoft.com/en-in/download/details.aspx?id=13255 驱动程序可以从下面的链接安装: http : //www.microsoft.com/en-in/download/details.aspx?id=13255
I was just wrestling with this problem and I found an odd solution that worked for me: 我只是在努力解决这个问题,却发现了一个对我有用的奇怪解决方案:
// NOTE: this way doesn't work. It throws an error:
// System.RuntimeInteropServices.COMException (0x80004005): [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified at ADODB.Connection.Open
//_connection = new Connection(_connectionString);
//_connection.Open();
// This way *does* work.
_connection = new Connection();
_connection.Open(_connectionString, null, null, 0);
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