vs怎么连接数据库

你有数据库吗？

连接你的数据库的位置，加他的 连接条件就可以拉下面是一个连接数据库的模块，大家可以使用它来连接SQL数据库，使用起来比ADO控件还简单：

代码如下：

Public rsNew As ADODB.Recordset

Public CnNew As ADODB.Connection

Public addFlag As Boolean

'连接数据库

Public Function OpenCn() As Boolean

Dim Mag As String

On Error GoTo strErrMag

Set CnNew = New ADODB.Connection

CnNew.ConnectionTimeout = 25

CnNew.Provider = "sqloledb"

CnNew.Properties("data source").value = "" 'SQL服务器的名

CnNew.Properties("initial catalog").value = "pubs"'库名

CnNew.Properties("integrated security").value = "SSPI"'登陆类型

'con.Properties("user id").value = "sa"

'con.Properties("password").value = "wwww"

CnNew.Open

OpenCn = True

addFlag = True

Exit Function

strErrMag:

Mag = "数据库末连接"

Call MsgBox(Mag, vbOKCancel, "错误:数据库连接")

addFlag = False

End

End Function

Public Sub Clocn()

'闭关数据库

On Error Resume Next

If CnNew.State <>adStateClosed Then CnNew.Close

Set CnNew = Nothing

End Sub

Public Function OpenRs(ByVal strSql As String) As Boolean

'连接数据库记录集

Dim Mag As String

Dim rpy As Boolean

On Error GoTo strErrMag

Set rsNew = New ADODB.Recordset

If addFlag = False Then rpy = OpenCn

With rsNew

.ActiveConnection = CnNew

.CursorLocation = adUseClient

.CursorType = adOpenKeyset

.LockType = adLockOptimistic

.Open strSql

End With

addFlag = True

OpenRs = True

Exit Function

strErrMag:

Mag = "数据库数据集末连接"

Call MsgBox(Mag, vbOKOnly, "错误:数据库连接")

OpenRs = False

End

End Function

Public Sub cloRs()

'闭关数据集

On Error Resume Next

If rsNew.State <>adStateClosed Then rsNew.Close

Set rsNew = Nothing

End Sub

利用Sql控件配置数据源连接数据库。

1、使用GridView控件绑定该数据源。

2、添加计数器添加SQL的常用统计然后在下面列出的项目里面选择用户连接就可以时时查询到数据库的连接数了。

---