vb.net本地数据库 vb数据库开发

VB.net 数据库

改成下面这样：

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Dim cmdtext As String = "Update 用户信息表 Set 密码='" txt密码new.Text "',用户='" txt用户名.Text "' Where ID=" Int(Val(UserID))

VB.NET怎么获取本机的数据库

这里以OERACLE数据库为例 ：

Provider=MSDAORA;data source =主机名:1521/ORCL;User ID=system;Password=ORACLE;Unicode=True

Dim myConn As Data.OleDb.OleDbConnection

myConn = New System.Data.OleDb.OleDbConnection()

myConn.ConnectionString = strCon

myConn.Open()

vb.net和mysql本地数据库连接

直接在代码里连接就可以啦。

首先本地的数据库要启动起来。然后直接再点net里的配置文件里配置数据库的访问，然后就可以发文了数据库的地址，用户名和密码。

求用vb.net写一个读取数据库数据的简单操作。

Option Explicit On

Option Strict On

Imports System

Imports System.Data

Imports System.Data.SqlClient

Public Class Program

Public Shared Sub Main()

Dim connectionString As String = _

"Data Source=(local);Initial Catalog=Northwind;" _

"Integrated Security=true"

' Provide the query string with a parameter placeholder.

Dim queryString As String = _

"SELECT ProductID, UnitPrice, ProductName from dbo.Products " _

"WHERE UnitPrice @pricePoint " _

"ORDER BY UnitPrice DESC;"

' Specify the parameter value.

Dim paramValue As Integer = 5

' Create and open the connection in a using block. This

' ensures that all resources will be closed and disposed

' when the code exits.

Using connection As New SqlConnection(connectionString)

' Create the Command and Parameter objects.

Dim command As New SqlCommand(queryString, connection)

command.Parameters.AddWithValue("@pricePoint", paramValue)

' Open the connection in a try/catch block.

' Create and execute the DataReader, writing the result

' set to the console window.

Try

connection.Open()

Dim dataReader As SqlDataReader = _

command.ExecuteReader()

Do While dataReader.Read()

Console.WriteLine( _

vbTab "{0}" vbTab "{1}" vbTab "{2}", _

dataReader(0), dataReader(1), dataReader(2))

Loop

dataReader.Close()

Catch ex As Exception

Console.WriteLine(ex.Message)

End Try

Console.ReadLine()

End Using

End Sub

End Class

这是我在vs2010中微软自带的MSDN示例代码里面拷的，是关于ADO.net连接sql的操作。

希望对你有帮助。 如果你还需要其他的，我也可以再拷给你看。