vb.net中怎么修改用户密码?ds1.Tables.Item(0).Rows.Item(0).Item(1) = userpassword提示无法找到表0
你可以debug将sql语句截出来放到数据里运行一下试试sql语句有没有问题
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再有将ds1.Tables.Item(0)改为ds.Tables[0]试试
vb.net中修改用户密码
以下这里有错误:
Dim mysqlstr As String = "SELECT * FROM 登录表 WHERE users='" username " 'AND password='" userpassword " '"
修改为:
Dim mysqlstr As String = "SELECT * FROM 登录表 WHERE users='" username "' AND password='" userpassword "'"
VB.NET用户登录,账号密码正确,却提示密码错误!
Private Sub BtOk_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Btok.Click
Dim con As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Admin.accdb;Persist Security Info=True")
Dim com As OleDbCommand = New OleDbCommand("select * from 用户名", con)
con.Open()
Dim h1 As OleDbDataReader
Dim table As New DataTable
h1 = com.ExecuteReader()
table.Load(h1)
If txtName.Text = "" Then
MsgBox("请输入用户名", MsgBoxStyle.OkCancel + MsgBoxStyle.Exclamation, "错误提示")
ElseIf txtName.Text "" And txtPasswd.Text = "" Then
MsgBox("请输入密码", MsgBoxStyle.OkCancel + MsgBoxStyle.Exclamation, "错误提示")
ElseIf table.Select("用户名='" txtName.Text "'").Length 0 Then
If table.Select("用户名='" txtName.Text "'")(0)("密码").ToString = txtPasswd.Text Then
MsgBox("成功登陆", MsgBoxStyle.OkCancel + MsgBoxStyle.Exclamation, "错误提示") Then
Form1.Show()
Me.Visible = False
Exit Sub
Else
MsgBox("密码错误", MsgBoxStyle.OkCancel + MsgBoxStyle.Exclamation, "错误提示")
End If
Else
MsgBox("用户名不存在", MsgBoxStyle.OkCancel + MsgBoxStyle.Exclamation, "错误提示")
Exit Sub
End If
table.Clear()
h1.Close()
con.Close()
End Sub
新闻名称:vb.net账号密码,vb输入密码
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