我写了一些代码,并得到两个错误:
-
'Else' must be preceded by a matching 'If' or 'ElseIf'.
-
Expression expected.
代码如下:
Imports System.Data.Odbc
Public Class FormLogin
Dim CMD As New OdbcCommand
Dim RD As OdbcDataReader
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If TextBox1.Text = "" Or TextBox2.Text = "" Then MsgBox("Data Login Belum Lengkap!")
Exit Sub
Else
Call Koneksi()
CMD = New OdbcCommand("Select * From tbl_admin where kode_admin=" & TextBox1.Text & "and password_admin=" & TextBox2.Text &, Conn)
RD = CMD.ExecuteReader
RD.Read()
If RD.HasRows Then
Me.Close()
FormMenuUtama.Show()
FormMenuUtama.LoginToolStripMenuItem.Enabled = False
FormMenuUtama.LogoutToolStripMenuItem.Enabled = True
FormMenuUtama.MasterToolStripMenuItem.Enabled = True
FormMenuUtama.TransaksiToolStripMenuItem.Enabled = True
FormMenuUtama.LaporanToolStripMenuItem.Enabled = True
Else
MsgBox("Kode Admin atau Password Salah")
End If
End Sub
Private Sub FormLogin_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TextBox1.MaxLength = 6
TextBox2.PasswordChar = "*"
TextBox1.Clear()
TextBox2.Clear()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
End Class
1)在If
语句中,Then
后面不加代码。变成一行
:
If TextBox1.Text = "" Or TextBox2.Text = "" Then
MsgBox("Data Login Belum Lengkap!")
...
不是If TextBox1.Text = "" Or TextBox2.Text = "" Then MsgBox("Data Login Belum Lengkap!")
...
2)有一个额外的&
:
CMD = New OdbcCommand("Select * From tbl_admin where kode_admin=" & TextBox1.Text & "and password_admin=" & TextBox2.Text , Conn)
不是CMD = New OdbcCommand("Select * From tbl_admin where kode_admin=" & TextBox1.Text & "and password_admin=" & TextBox2.Text &, Conn)
在结束子标题前添加另一个结束If。
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If TextBox1.Text = "" Or TextBox2.Text = "" Then MsgBox("Data Login Belum Lengkap!")
Exit Sub
Else
Call Koneksi()
CMD = New OdbcCommand("Select * From tbl_admin where kode_admin=" & TextBox1.Text & "and password_admin=" & TextBox2.Text &, Conn)
RD = CMD.ExecuteReader
RD.Read()
If RD.HasRows Then
Me.Close()
FormMenuUtama.Show()
FormMenuUtama.LoginToolStripMenuItem.Enabled = False
FormMenuUtama.LogoutToolStripMenuItem.Enabled = True
FormMenuUtama.MasterToolStripMenuItem.Enabled = True
FormMenuUtama.TransaksiToolStripMenuItem.Enabled = True
FormMenuUtama.LaporanToolStripMenuItem.Enabled = True
Else
MsgBox("Kode Admin atau Password Salah")
End If
End If
End Sub