(HtmlTextWriterTag.Tr)
writer.RenderBeginTag(HtmlTextWriterTag.Td)
writer.Write("密码：")
writer.RenderEndTag()
writer.RenderBeginTag(HtmlTextWriterTag.Td)
writer.AddAttribute(HtmlTextWriterAttribute.Type, "Password")
writer.AddAttribute(HtmlTextWriterAttribute.Name, Me.UniqueID & ":Pass")
writer.AddAttribute(HtmlTextWriterAttribute.Maxlength, "30")
writer.RenderBeginTag(HtmlTextWriterTag.Input)
writer.RenderEndTag()
writer.RenderEndTag()
writer.RenderEndTag()
writer.RenderBeginTag(HtmlTextWriterTag.Tr)
writer.AddAttribute(HtmlTextWriterAttribute.Cols, "2")
writer.RenderBeginTag(HtmlTextWriterTag.Td)
writer.AddAttribute(HtmlTextWriterAttribute.Type, "submit")
writer.AddAttribute(HtmlTextWriterAttribute.Name, Me.UniqueID)
writer.AddAttribute(HtmlTextWriterAttribute.value, "提交")
writer.RenderBeginTag(HtmlTextWriterTag.Input)
writer.RenderEndTag()
writer.RenderEndTag()
writer.RenderEndTag()
writer.RenderEndTag()
Catch _error As Exception
System.Web.HttpContext.Current.Response.Write("未能完成请求，错误信息如下：" & _error.Message)
Exit Sub
End Try
End Sub
Public Function LoadPostData(ByVal postDataKey As String, ByVal postCollection As System.Collections.Specialized.NamevalueCollection) As Boolean Implements System.Web.UI.IPostBackDataHandler.LoadPostData
Dim _txtUserName As String = postCollection(Me.UniqueID & ":User")
Dim _txtPass As String = postCollection(Me.UniqueID & ":Pass")
If _txtUserName = "" Or _txtPass = "" Then
Return True
Else
txtUser = _txtUserName
txtPass = _txtPass
OnCheckMain()
Return False
End If
End Function
Public Sub RaisePostDataChangedEvent() Implements System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent
RaiseEvent EnterEmpty(Me, New EventArgs())
End Sub
Private Sub OnCheckMain() ''''验证用户的合法性，引发CheckedResult事件
Dim _connStr As String = ConnStr
Dim _conn As New SqlConnection(_connStr)
Dim _comm As New SqlCommand()
Dim _dataReader As SqlDataReader
Try
_comm.Connection = _conn
_comm.CommandText = "select * from " & DataTable & " where " & ColUser & "=''''" & txtUser & "'''' and " & ColPass & "=''''" & txtPass & "''''"
_comm.CommandType = CommandType.Text
_conn.Open()
_dataReader = _comm.ExecuteReader(CommandBehavior.CloseConnection)
If _dataReader.Read Then
RaiseEvent CheckedResult(Me, New LoginEvent(txtUser, txtPass, True))
Else
RaiseEvent CheckedResult(Me, New LoginEvent(txtUser, txtPass, False))
End If
_dataReader.Close()
Catch _error As Exception
Throw New Exception(_error.Message)
Finally
If _conn.State = ConnectionState.Open Then _conn.Close()
End Try
End Sub
End Class
---------------------------------------------------------源码2
''''2004.6.10
''''Programmer by czclk
''''自定义事件类LoginEvent，该事件参数e继承自EventArgs，含有用户名，密码，登录合法性(布尔值)
Public Class LoginEvent
Inherits EventArgs
Public Sub New()
End Sub
Public Sub New(ByVal user As String, ByVal pass As String, ByVal result As Boolean)
_userName = user
_userPass = pass
_CheckedPass = result
End Sub
Private _userName As String
Private _userPass As String
Private _CheckedPass As Boolean
Public Property CheckPass() As Boolean
Get
Return _CheckedPass
End Get
Set(ByVal value As Boolean)
_CheckedPass = value
End Set
End Property
Public Property UserName() As String
Get
Return _userName
End Get
Set(ByVal value As String)
_userName = value
End Set
End Property
Public Property UserPass() As String
Get
Return _userPass
End Get
Set(ByVal value As String)
_userPass = value
End Set
End Property
End Class
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