非静态字段、方法或属性System.Net.Mail.SmtpClient.EnableSsl.get需要对象引用

Question

有人能帮我纠正这个错误吗？我基本上是在尝试创建一个个人电子邮件客户端，以更熟悉语言，但我似乎找不到如何解决这个问题。这是代码。

 private void fusionButton1_Click(object sender, EventArgs e)
    {
        String One = textBox1.Text;
        String Two = textBox2.Text;
        String Three = textBox3.Text;
        String Four = textBox4.Text;
        MailMessage message = new MailMessage();
        message.From = new MailAddress("[e-mail]");
        message.To.Add(new MailAddress(String.Copy(Four)));
        message.Subject = String.Copy(Three);
        message.Body = String.Copy(One); String.Copy(Two);
        SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
        client.Send(message);
        NetworkCredential netCre = new NetworkCredential("[e-mail]", "Pass");
        client.UseDefaultCredentials = false;
        SmtpClient.EnableSsl = true;

Answer 1

使用此行：

client.EnableSsl = true;

而不是这个：

SmtpClient.EnableSsl = true;

您将非静态属性EnableSsl引用为静态。

注意：

您不需要使用String.Copy:

message.Subject = String.Copy(Three);

你可以直接使用这个：

message.Subject = textBox3.Text; 
message.Body = textBox1.Text + " " + textBox2.Text;

试试这个代码：

private void fusionButton1_Click(object sender, EventArgs e)
{       
    MailMessage message = new MailMessage();
    message.From = new MailAddress("[e-mail]");
    message.To.Add(new MailAddress(textBox4.Text));
    message.Subject =  textBox3.Text;
    message.Body =  textBox1.Text + " " + textBox2.Text; 
    SmtpClient client = new SmtpClient("smtp.gmail.com", 587);       
    client.DeliveryMethod = SmtpDeliveryMethod.Network;
    client.UseDefaultCredentials = false;
    client.Credentials = new NetworkCredential("[e-mail]", "Pass");        
    client.EnableSsl = true;
    client.Send(message);
 }