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VB.NET快遞2010年無法連接到MySQL數據庫
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim connection As MySqlConnection
connection = New MySqlConnection()
connection.ConnectionString = "Server=example.com; Uid=***; Pwd=***; Database=***;"
Try
connection.Open()
MessageBox.Show("Connection Opened Successfully")
connection.Close()
Catch mysql_error As MySqlException
MessageBox.Show("Error Connecting to Database: " & mysql_error.Message)
Finally
connection.Dispose()
End Try
End Sub
我已經進口MySql.Data.MySqlClient太:
Imports MySql.Data.MySqlClient
但是,當我按一下按鈕,整個應用程序只是凍結。
我已經添加了對MySql.Data.dll的引用。路徑:
C:\Program Files\MySQL\MySQL Connector Net 6.4.4\Assemblies\v4.0\MySql.Data.dll
這些文件是從安裝程序安裝從http://dev.mysql.com/downloads/connector/net/
這是爲什麼下載?
它在應用程序執行過程中凍結在哪裏?我敢打賭,這是試圖建立一個連接到服務器,它需要比預期更長的時間,而不是超時。在MessageBox.Show上設置一個斷點並查看它是否被擊中。 – 2011-12-28 03:35:31