Question

我正在尝试使用C＃ASP.NET从网站发送包含字段名称，电子邮件，类别，主题和消息的电子邮件。我的要求是当用户点击发送按钮时，电子邮件将发送到给定的邮件地址。我在下面解释我的代码。

Contact.aspx：

<form id="form1" class="contactformdetils" runat="server" >
    <fieldset>
        <div class="clearfix">
            <div class="input">
                <label>Your name:</label>
                <asp:TextBox ID="txtName" name="name" runat="server" ></asp:TextBox>
            </div>
            <div class="input">
                <label>Your email:</label>
                <asp:TextBox ID="txtEmail" runat="server" name="email"></asp:TextBox>
            </div>
        </div>
        <div class="clearfix">
            <div class="input">
                <label>Category:</label>
                <asp:TextBox ID="txtCategory" runat="server" name="category"></asp:TextBox>
            </div>
            <div class="input">
                <label>Subject:</label>
                <asp:TextBox ID="txtSubject" runat="server" name="subject"></asp:TextBox>
            </div>
        </div>
        <label>Message:</label>
        <asp:TextBox ID="txtMessage" runat="server" name="message" Rows="6" TextMode="MultiLine"></asp:TextBox>
        <div class="clearfix captcha">
        <asp:Button  runat="server" Text="Send Message" class="button" id="email_submit" onClick="email_submit_Click"  />
            <div class="captcha-wrapper">
            <asp:Label  ID="lblResult" runat="server" Visible="false" />
            </div> 
        </div>
    </fieldset>
</form>

Contact.aspx.cs：

protected void email_submit_Click(object sender, EventArgs e)
{
    if (txtName.Text == "")
    {
        lblResult.Visible = true;
        lblResult.Text = "Name field should not keep blank";
        lblResult.ForeColor = System.Drawing.Color.Red;
        return;
    }
    if (txtEmail.Text == "")
    {
        lblResult.Visible = true;
        lblResult.Text = "Email field should not keep blank";
        lblResult.ForeColor = System.Drawing.Color.Red;
        return;
    }
    if (txtCategory.Text == "")
    {
        lblResult.Visible = true;
        lblResult.Text = "Catagory field should not keep blank";
        lblResult.ForeColor = System.Drawing.Color.Red;
        return;
    }
    if (txtSubject.Text == "")
    {
        lblResult.Visible = true;
        lblResult.Text = "Subject field should not keep blank";
        lblResult.ForeColor = System.Drawing.Color.Red;
        return;
    }
    if (txtMessage.Text == "")
    {
        lblResult.Visible = true;
        lblResult.Text = "Message field should not keep blank";
        lblResult.ForeColor = System.Drawing.Color.Red;
        return;
    }
   bool isEmail = Regex.IsMatch(txtEmail.Text.Trim(), @"\A(?:[A-Za-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[A-Za-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-z0-9])?\.)+[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-z0-9])?)\Z");
   if (!isEmail)
   {
        lblResult.Visible = true;
        lblResult.Text = "Enter Valid Email ID..";
        lblResult.ForeColor = System.Drawing.Color.Red;
        return;
   }
   if (txtName.Text.Trim().Length > 0 && txtEmail.Text.Trim().Length > 0 && txtCategory.Text.Trim().Length > 0 && txtSubject.Text.Trim().Length > 0 && txtMessage.Text.Trim().Length > 0 )
   {
       SmtpClient smtpClient = new SmtpClient();
       MailMessage message = new MailMessage();
       try
       {
           MailAddress fromAddress = new MailAddress(txtEmail.Text, txtName.Text);
           smtpClient.Host = "localhost";
           smtpClient.Port = 25;
           message.From = fromAddress;
           message.To.Add("*********@gmail.com");
           message.Subject = txtSubject.Text;
           message.IsBodyHtml = false;
           message.Body = txtMessage.Text;
           smtpClient.Send(message);
           lblResult.Visible = true;
           lblResult.Text = "Email successfully sent.";
       }
       catch (Exception ex)
       {
           lblResult.Visible = true;
           lblResult.Text = "Send Email Failed.<br>" + ex.Message;
       }
   }
}

当用户点击发送按钮时，邮件将被发送到此表单上键入的电子邮件地址。

Answer 1

这可能是由于端口号。我有一次类似的问题。尝试使用端口

587或465

smtpClient.Port = 587;

或

smtpClient.Port = 465;

应该可以正常工作。如果它们不起作用，请尝试其他端口号。

Answer 2

            SmtpClient smtpClient= new SmtpClient("smtp.gmail.com");                
            smtpClient.Port = 587;
            smtpClient.Credentials = new System.Net.NetworkCredential("username", "password");
            smtpClient.EnableSsl = true;

Answer 3

您的代码

smtpClient.Host = "localhost";
smtpClient.Port = 25;

替换为以下内容：

smtpClient.Host = "smtp.gmail.com";
smtpClient.Port = 587;

修改

smtpClient.EnableSsl = true;

<强>更新

smtpClient.Credentials = new System.Net.NetworkCredential("From EmailID","Password");

注意：

From EmailID不是User enterd emailid。用于向最终用户发送电子邮件的From EmailID电子邮件。并提供该emailid密码。

并确保您尝试发送群发邮件，然后检查smtpClient.Port是否应该阻止。

希望这对你有所帮助。

Answer 4

如果您使用Gmail发送邮件，请使用

smtp.Host = "smtp.gmail.com";

而不是

smtpClient.Host = "localhost";

无法以网络形式发送电子邮件

4 个答案: