连接到 wampserver MySQL 在 PHP 中有效但在 vb.NET 中无效

Question

我有一个本地 wampserver 运行 MySQL。我已通过 PHP:

成功连接到它

<?php
$servername = "localhost";
$username = "pyramid";
$password = "pyramid";

try {
    $conn = new PDO("mysql:host=$servername;dbname=test", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully"; 
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage();
    }
?>

这非常有效，我得到了结果 "Connected Successfully"。

然而，当我在 vb.net 中使用此代码尝试相同的操作时：

Imports System.Data.SqlClient
Public Class Form1

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs)     Handles MyBase.Load
        Dim ConnectionString As String
        Dim SQLCon As SqlConnection

        ConnectionString =     "Server=localhost;Database=test;Uid=pyramid;Pwd=pyramid"
        SQLCon = New SqlConnection(ConnectionString)

        Try
            SQLCon.Open()
        Catch ex As Exception
            If ex.InnerException IsNot Nothing Then
                MessageBox.Show(ex.InnerException.Message)
            Else
                MessageBox.Show(ex.Message)
            End If
        Finally
            If SQLCon.State = ConnectionState.Open Then SQLCon.Close()
        End Try
    End Sub
End Class

经过 5 到 10 秒的漫长等待，我得到 "The system cannot find the file specified"

两者具有完全相同的用户名、密码服务器和数据库名称，但仍然vb.NET拒绝连接。

我已经尝试了几乎所有我能想到的方法，并且用尽了我的选择。你能说点什么吗？

Answer 1

您需要下载 .NET Framework (http://dev.mysql.com/downloads/connector/net/) 的 MySQL 连接器，然后在您的项目中引用 .DLL。

Imports MySqL.Data.MySqlClient
Public Class Form1

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs)     Handles MyBase.Load
    Dim ConnectionString As String
    Dim SQLCon As MySqlConnection

    ConnectionString =     "Server=localhost;Database=test;Uid=pyramid;Pwd=pyramid"
    SQLCon = New MySqlConnection(ConnectionString)

    Try
        SQLCon.Open()
    Catch ex As Exception
        If ex.InnerException IsNot Nothing Then
            MessageBox.Show(ex.InnerException.Message)
        Else
            MessageBox.Show(ex.Message)
        End If
    Finally
        If SQLCon.State = ConnectionState.Open Then SQLCon.Close()
    End Try
End Sub
End Class

连接到 wampserver MySQL 在 PHP 中有效但在 vb.NET 中无效

Connecting to wampserver MySQL works in PHP but not in vb.NET

php

mysql

vb.net

wamp

visual-studio-2010