Question

当我尝试执行以下代码以在文本框中输入值时，会出现错误说明：对主机进行身份验证＆＃39;＆＃39;对于用户＆＃39;＆＃39;使用方法＆＃39; mysql_native_password＆＃39;消息失败：用户访问被拒绝＆＃39;＆＃39; Adam-PC＆＃39; （使用密码：否）

Public Sub TextBox1_TextChanged（sender as Object，e As EventArgs）处理Datetxt.TextChanged Dim ConnectionString As String Dim con As New MySqlConnection

    ConnectionString = "server=localhost;user id=root;database=river_data;allowuservariables=True"";Integrated Security=True;MultipleActiveResultSets=True;"

    Dim cmd As MySqlCommand
    Dim query As String = "SELECT date FROM river-derwent-keswick-portinscale WHERE(`date` = '01.01.2013') "
    cmd = New MySqlCommand(query, con)
    con.Open()

    Dim myreader As MySqlDataReader = cmd.ExecuteReader()
    If myreader.Read() Then
        Datetxt.Text = myreader.GetValue(0)
    Else
        Me.Close()
        HomeForm.Show()
    End If
    myreader.Close()

Answer 1

ConnectionString = "server=localhost;user id=root;database=river_data;allowuservariables=True"";Integrated Security=True;MultipleActiveResultSets=True;"

看起来用户部分是错误的。尝试：

ConnectionString = "server=localhost;user=root;database=river_data;allowuservariables=True"";Integrated Security=True;MultipleActiveResultSets=True;"

连接到mysql数据库失败

1 个答案: