回覆。寫給標籤

Question

我在表單上有以下代碼，以便用戶提交表單併發送併發送電子郵件。我有兩個response.write語句，我想改變它們，以便它將這些寫入標籤（lblSubmit）。任何幫助，將不勝感激。

<script runat="server"> 

    protected void Page_Load(object sender, EventArgs e) 
    { 


     if (IsPostBack) 
     { 



      SmtpClient sc = new SmtpClient("smtp.talktalk.net"); 
      StringBuilder sb = new StringBuilder(); 
      MailMessage msg = null; 

      sb.Append("Email from: " + txtEmail.Text + "\n"); 
      sb.Append("Message : " + txtQuestion.Text + "\n"); 

      try 
      { 
       msg = new MailMessage(txtEmail.Text, 
        "myemail@talktalk.net", "Message from Web Site", 
        sb.ToString()); 

       sc.Send(msg); 




       Response.Write("Message sent!"); 

      } 
      catch (Exception ex) 
      { 

       // something bad happened 
       Response.Write("Something bad happened!"); 

      } 
      finally 
      { 

       if (msg != null) 
       { 
        msg.Dispose(); 
       } 

      } 

     } 

    } 







</script> 
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> 
</asp:Content> 
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> 



<div id="title"><p>Contact Us...</p></div> 



<div id="titletext"><p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.</p></div> 

<div id="contactform"> 



    <asp:Label ID="lblName" runat="server" Text="Name:"></asp:Label> 
    &nbsp; 
    <asp:TextBox ID="txtName" runat="server" Width="189px"></asp:TextBox> 
    <br /> 
    <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" 
     ControlToValidate="txtName" ErrorMessage="Please enter your name" 
     ForeColor="Red" Display="Dynamic"></asp:RequiredFieldValidator> 
    <br /><br /> 
    <asp:Label ID="lblEmail" runat="server" Text="Email:"></asp:Label> 
    &nbsp; 
    <asp:TextBox ID="txtEmail" runat="server" Width="189px"></asp:TextBox> 
    <br /> 
    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
     ControlToValidate="txtEmail" Display="Dynamic" ErrorMessage="Please enter an email address" 
     ForeColor="Red"></asp:RequiredFieldValidator> 
    <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" 
     ControlToValidate="txtEmail" ErrorMessage="Please enter a valid Email address" 
     ForeColor="Red" 
     ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" 
     Display="Dynamic"></asp:RegularExpressionValidator> 
    <br /> 
    <br /> 

    <asp:Label ID="lblPhone" runat="server" Text="Phone:"></asp:Label> 
    &nbsp; 
    <asp:TextBox ID="txtPhone" runat="server" Width="189px"></asp:TextBox> 
    <br /> 
    <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" 
     ControlToValidate="txtPhone" 
     ErrorMessage="Please enter a contact telephone number" ForeColor="Red" 
     Display="Dynamic"></asp:RequiredFieldValidator> 

    <br /> 

    <asp:Label ID="lblQuestion" runat="server" Text="Question:"></asp:Label> 
    <asp:TextBox ID="txtQuestion" runat="server" Height="103px" TextMode="MultiLine" 
     Width="189px"></asp:TextBox> 
    <br /> 
    <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
     ControlToValidate="txtQuestion" ErrorMessage="Please enter a message" 
     ForeColor="Red"></asp:RequiredFieldValidator> 


    <asp:Label ID="lblSubmit" runat="server"></asp:Label> 


<asp:Button ID="cmdSubmit" runat="server" Text="Submit" CssClass="cmdSubmit" 
     onclick="cmdSubmit_Click" PostBackUrl="~/Contact Us.aspx" /> 


</div> 
</asp:Content> 

Answer 1

要設置你只設置在其.Text屬性值Label控件的文本。因此，而不是這樣的：

Response.Write("some string"); 

你有這樣的：

lblSomeLabel.Text = "some string"; 

這是大大超過首選Response.Write因爲標籤控件允許你的頁面作爲佔位符在指定位置。 Response.Write只是盲目地將字符串寫入響應，可能是將它追加到HTML的其餘部分或中間的某個未定義位置。

請注意，Label控件將文字包裝在span元素中。如果要輸出完成標記控制的原始數據，請考慮使用Literal控件。

在一個側面說明，建議的幾句話，你的代碼...

查找到the using statement在C＃。它以更優雅的方式處理try/finally構造的任何實現IDisposable（任何需要撥打.Dispose()的東西）的任何東西。從本質上來說，它可以節省您自己編寫處理代碼的需求，並且通常會產生更清潔和更安全的代碼。

在您的catch聲明中，您當前的完全忽略了您實際遇到的異常。這是故意的嗎？或者正在用這段代碼修復你的計劃的這一部分？作爲一般規則，絕不會丟棄異常數據。它包含實際的錯誤信息什麼發生（而不是「發生了什麼壞事」）以及其中發生了。

Answer 2

如果你有一個ASP.NET標籤控件，你可以設置它的Text屬性值。

<asp:Label ID="lblSubmit" runat="server" Text="Label"></asp:Label> 

，並在代碼中，

lblSomeLabel.Text = "Email Sent"; 

你甚至可以使用一個DIV控制中具有runat = 「服務器」 屬性，並從代碼中設置的是內部HTML

<div id="divMessage" runat="server" /> 

並在代碼中，

divMessage.innerHTML="Email Sent!"; 

Answer 3

B etter使用labelname.text =「yourtext」;

或上面提到的標籤的文本屬性值。