使用VB.Net连接到在线MySQL数据库

Question

我已经四处搜寻，却无法找到任何符合此目的的东西。

Answer 1

您需要安装Connector / Net ，它将为您提供可使用的MySql的完整ADO.Net提供程序。 请注意，这是GPL软件，这意味着，如果您将其作为商业产品的一部分进行分发，则还必须分发源代码。 这是一个开放的法律问题，但是最后我听说大多数网站对此都可以接受，因为您没有分发服务器代码。 但是，桌面应用程序可能有问题。

Answer 2

Imports System.Data.SqlClient
Imports MySql.Data.MySqlClient
Public Class LoginForm1
    Dim MySQLConnection As MySqlConnection
    Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Me.Close()
    End Sub

    Private Sub Cancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Me.Close()
    End Sub

    Private Sub Cancel_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Cancel.Click
        End
    End Sub
Private Sub OK_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
        MySQLConnection = New MySqlConnection
        MySQLConnection.ConnectionString = "server=db4free.net;Port=3306; User ID=db4freeusername; password=db4freepassword; database=nameofyourdatabase"
        MySQLConnection.Open()

        Dim MyAdapter As New MySqlDataAdapter
        Dim SqlQuary = "SELECT * From nameofthetable WHERE Username='" & UsernameTextBox.Text & "' AND password = '" & PasswordTextBox.Text & "';"
        Dim Command As New MySqlCommand
        Command.Connection = MySQLConnection
        Command.CommandText = SqlQuary
        MyAdapter.SelectCommand = Command
        Dim Mydata As MySqlDataReader
        Mydata = Command.ExecuteReader
        If Mydata.HasRows = 0 Then
            MsgBox("Error During Login:Please Enter Valid Data")
        Else
            Form1.Show()
            Me.Hide()
        End If
    End Sub
End Class

Answer 3

首先，您需要为.NET安装MySQL连接器 。

Imports MySql.Data.MySqlClient

Dim myConnection As MySqlConnection = New MySqlConnection()
Dim myConnectionString As String = "Server=SERVERNAME;Database=DATABASE;Uid=root;Pwd=password;"
myConnection.ConnectionString = myConnectionString
myConnection.Open()

//execute queries, etc

myConnection.Close()

Answer 4

安装.NET和APACHE的MySQL连接器，还安装XAMPP，以便可以使用phpMyAdmin

Answer 5

我使用C＃：

const String ConnectionString = "Driver={MySQL ODBC 5.1 Driver};Server=localhost;Port=3306;Database=test;User=root;Password=;Option=3;";

OdbcConnection conn = new OdbcConnection(ConnectionString);

conn.Open();

OdbcCommand command = new OdbcCommand();

command.CommandType = CommandType.StoredProcedure;

command.Connection = conn;

command.CommandText = "insert into search (tempsearchKey, state, suburb) values ('" + tempsearchKey+"','"+state+"','"+suburb+"')";

command.ExecuteNonQuery();

command.Cancel();

从mysql网站安装odbc驱动程序

并将其转换为VB.NET，

也许此链接可以帮助您：

http://dev.mysql.com/tech-resources/articles/ebonat-load-and-search-mysql-data-using-vbnet-2005.html