我在ASP页面上有一个文本框。该文本框充满了来自数据库的电子邮件,在文本框中每行打印出一封电子邮件,每行用vbCrLf分隔以使其正常工作。该文本框是可写的,因此人们可以输入更多电子邮件或清除该列表中的电子邮件。更改电子邮件列表后,有一个保存按钮,该按钮应读入新的电子邮件列表并将其发送回去。
但是,在文本框中输入新电子邮件或从文本框中删除一封电子邮件后,我单击了保存按钮,并且在其后面的代码中仍将文本框的文本读取为原始文本,而没有更改。我不知道为什么,因为代码仅在进行更改后才运行,所以当我调用emailBox.Text(我的文本框)时,它应该查找文本框中的任何文本,对吗?任何和所有帮助将不胜感激。
这是我的代码:
VB:
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Try
emailBox.Text = ""
Dim tempstoreID As Integer = 101
Dim ds As DataSet
Dim emailList As String = ""
ds = DBUtility.GetKisokAlertEmails(tempstoreID)
If Not ds Is Nothing AndAlso ds.Tables.Count > 0 And ds.Tables(0).Rows.Count > 0 Then
For Each dr In ds.Tables(0).Rows
emailList = dr("EmailList")
Next
End If
Dim seperatedEmailList() As String
seperatedEmailList = Split(emailList, ";")
For Each email As String In seperatedEmailList
emailBox.Text &= email & vbCrLf
Next
Catch ex As Exception
Dim tempstoreID As Integer = 101
LogUtility.LogMessage("Error in getting and parsing email list from database. " & ex.ToString, LogUtility.INFO_MESSAGE, tempstoreID)
End Try
End Sub
Protected Sub SaveButton(sender As Object, e As EventArgs)
Dim newEmailList() As String
newEmailList = Split(emailBox.Text, vbCrLf)
Dim regexExpression As New Regex("^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$")
Dim valid As Boolean
Dim errorEmail As String = "Nope"
Dim counter As Integer = 0
While counter < newEmailList.Length - 1
If (regexExpression.IsMatch(newEmailList(counter))) Then
valid = True
counter += 1
Else
valid = False
errorEmail = newEmailList(counter)
Exit While
End If
End While
End Sub
ASP:
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="label1" Text="List Of Emails" runat="server" /> <br />
<asp:TextBox ID="emailBox" TextMode="MultiLine" Text="" AutoPostBack="true" runat="server" />
<br/><br/>
<asp:Button Text="Save" OnClick="SaveButton" runat="server" />
<asp:Button Text="Cancel" runat="server" />
<br />
<asp:Label ID="TestLabel" Text = "Hi" runat="server"/>
<br />
<asp:Label ID="TestLabel2" Text ="howdy" runat="server" />
<br />
<asp:Label ID="TestLabel3" Text = "emails" runat="server" />
</div>
</form>
</body>
</html>
答案 0 :(得分:0)
当您单击button
保存时,首先执行Form1_Load,然后执行SaveButton函数,这就是为什么拥有旧数据的原因。因此,您需要将Form1_Load代码放入PostBack中:
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
if not IsPostBack then
//your code
end if
End Sub
您可以查看this post有关回发的信息。