各位大侠,帮小弟看看
这是我写的一段VB登录界面代码,没有提示错误,但是运行的时候,点击什么都没反应的呢Public Class HelloUser
Private Sub btnOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOK.Click
Dim str As String
str = "Data Source=程少COOL-PC\MSSQLSERVER2008;Initial Catalog=SMS;Integrated Security=True"
Dim con As New SqlClient.SqlConnection(str)
Try
con.Open()
Catch ex As Exception
End Try
Dim sql As String = "select * from manager where admin='" & Text1.Text.ToString().Trim() & "' and 密码='" & TextBox1.Text.ToString().Trim() & " '"
Dim cmd As New SqlClient.SqlCommand(sql, con)
Dim reader As SqlClient.SqlDataReader
Try
reader = cmd.ExecuteReader
If reader.Read() = True Then
功能首页.Show()
Me.Hide()
Else
MsgBox("对不起,用户名或密码错误!重新输入(请正确选择用户类型)", 16, "警告")
Me.Text1.Text = ""
Me.Text1.Text = ""
Text1.Focus()
End If
Catch ex As Exception
End Try
End Sub
End Class
望给予指导,谢谢!
--------------------编程问答-------------------- 出错了呗,因为你用Try..catch进行异常处理了,所以他就不提示错误了,你可以把try..catch去掉就知道错误在哪里了。
--------------------编程问答-------------------- 刚才是我有个地方搞错了,不过很快就解决啦 --------------------编程问答-------------------- 接分 --------------------编程问答--------------------
已经说得很明白了
补充:.NET技术 , VB.NET