未定义类型'MySqlConnection'

问题描述

在app_code中创建函数调用类时，我在以下代码上遇到错误.

I am facing the error on the below code while i created a function call class at app_code.

我的错误正在显示-> BC30002:类型'MySqlConnection'未定义.请帮忙.谢谢！

My error is showing -->BC30002: Type 'MySqlConnection' is not defined. Please help.Thanks!

Imports System.Data
Imports System.Data.SqlClient
Imports System.Net.Mail
Imports MySql.Data.MySqlClient

Namespace check90daysreturn

Public Class Check90days
    Public Function check(ByVal datereceived As String, ByVal shipdate As String, ByVal partsn As String)

        Dim con As String = ConfigurationManager.ConnectionStrings("xxxConnectionString").ConnectionString
        Dim Sql As New MySqlConnection(con)

        Dim reader2 As Object
        Dim theQuery2 As String = "SELECT Max(shipmentdate) FROM prc.tbsrparts t WHERE Substring(partsn, 17, 11) = '" + partsn.ToString + "'" 'get latest shipment date from database
        Dim command2 As New MySqlCommand(theQuery2, Sql)
        reader2 = command2.ExecuteScalar

        'send auto email
        Dim mailmssg As New MailMessage()
        Dim smtp_client As New SmtpClient

        mailmssg.IsBodyHtml = True
        smtp_client = New SmtpClient
        smtp_client.Host = "ll.smtp.xxxxx.com"
        smtp_client.Port = 25

        mailmssg.From = New MailAddress("[email protected]")

        mailmssg.CC.Add("[email protected]")
        mailmssg.Subject = "(Testing)"
        mailmssg.Body = "Testing"

        smtp_client.DeliveryMethod = SmtpDeliveryMethod.Network
        smtp_client.Send(mailmssg)



    End Function
End Class
End Namespace

推荐答案

我遇到了同样的错误.

I got the same error.

添加后

Imports MySql.Data.MySqlClient;

，以及对MySql.Data.dll的引用，我得到了' MySqlConnection未定义'.

, and a reference to the MySql.Data.dll I got 'MySqlConnection is not defined'.

我已通过添加较旧版本的引用MySql.Data.dll(而不是V4.5)来解决此问题.

I have fixed it by adding the reference MySql.Data.dll from the older version that is V2.0 instead of V4.5.

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