Question

我是新来的，我正在尝试连接到我的数据库并打开一个名为“Sintabar”的新表。我的代码有效，但数据没有进入我的表格。

Imports MySql.Data.MySqlClient

Public Class Form1
    Dim conn As New MySqlConnection

Public Sub connect()
    Dim DatabaseName As String = "sql6141508"
    Dim server As String = "sql6.freemysqlhosting.net"
    Dim userName As String = "'******'"
    Dim password As String = "*******"
    If Not conn Is Nothing Then conn.Close()
    conn.ConnectionString = String.Format("server={0}; user id={1}; password={2}; database={3}; pooling=false", server, userName, password, DatabaseName)
    Try
        conn.Open()

        MsgBox("התחברת בהצלחה")
    Catch ex As Exception
        MsgBox(ex.Message)
    End Try
    conn.Close()
End Sub

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    connect()
End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Try
        conn.Open()
    Catch ex As Exception
    End Try
    Dim cmd As New MySqlCommand(String.Format("CREATE TABLE sintabar (id INTEGER, name TEXT, age INTEGER);"))
    cmd.ExecuteNonQuery()
    conn.Close()

End Sub
End Class

错误消息：

类型'System.InvalidOperationException'的未处理异常发生在MySql.Data.dll中。 system.invalidOpertionException： {“连接必须有效且开放。”}

是的，我的用户是管理员。

尝试打开新表，但收到错误

0 个答案: