有人可以帮我解决以下问题。使用MySQL数据库的VB.NET登录表格
我创建了一个名为dbhr的数据库和一个名为user的表,其中有两个字段'username'和'password'具有VARCHAR数据类型。 我有两个文本框(tbxUsername,tbxPassword)和一个确定按钮的登录表单。我已连接我的数据库以验证用户名和密码。但它总是给我错误的密码信息。我不知道我错在哪里。 请帮忙。
我使用MySQL Workbench 6.1
在此先感谢。
这里是VB.NET登录按钮代码。
Imports MySql.Data.MySqlClient
Public Class Login
Dim mydbcon As MySqlConnection
Dim COMMAND As MySqlCommand
' TODO: Insert code to perform custom authentication using the provided username and password
' (See http://go.microsoft.com/fwlink/?LinkId=35339).
' The custom principal can then be attached to the current thread's principal as follows:
' My.User.CurrentPrincipal = CustomPrincipal
' where CustomPrincipal is the IPrincipal implementation used to perform authentication.
' Subsequently, My.User will return identity information encapsulated in the CustomPrincipal object
' such as the username, display name, etc.
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
mydbcon = New MySqlConnection
mydbcon.ConnectionString = "server=localhost;userid=root;password=rootword;database=hrdb"
Dim reader As MySqlDataReader
Try
mydbcon.Open()
Dim Query As String
Query = "select * from user where username= ' " & tbxUsername.Text & "' and password= ' " & tbxPassword.Text & "' "
COMMAND = New MySqlCommand(Query, mydbcon)
reader = COMMAND.ExecuteReader
Dim count As Integer
count = 0
While reader.Read
count = count + 1
End While
If count = 1 Then
MessageBox.Show("Username and password are correct")
ElseIf count > 1 Then
MessageBox.Show("Username and password are duplicate")
Else
MessageBox.Show("Username and password are wrong")
End If
mydbcon.Close()
Catch ex As MySqlException
MessageBox.Show(ex.Message)
Finally
mydbcon.Dispose()
End Try
End Sub
请点击以下链接查看数据库表记录和数据类型。
点击here!
为什么你不把你的按钮代码放在这篇文章中,而不是提供一个链接到一些下载网站? – Mych 2014-08-29 14:25:49
添加了按钮代码。我也必须提供数据库设置,这就是为什么我附上截图。 – user3765415 2014-08-29 14:35:08
好的......现在你总是得到什么信息?顺便说一句,你看到的东西存储密码未加密的是你的意图吗? – Mych 2014-08-29 14:40:14