convert string to smtpclient in c#

I am currently developing an asp.net web app. I have a 开发者_如何学运维class which is going to be used for sending an email.

I want to get the SMTP Server address from a MySQL Database. To get the value from the MySQL Database I am using

string smtp = reader.GetString("smtp_server");

For assigning the smtp server to the mail function I am using

SmtpClient server = new SmtpClient(smtp);

Hoever, I am getting the error unable to convert from string to SmtpClient. I have tried to add a cast of (SmtpClient) but it is not letting me do this.

Thanks for any help you can provide.

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Are you sure the error is happening where you think it's happening. The SmtpClient class has a constructor which accepts a string. I get the feeling there's more happening in your code than you're sharing with us. Can you show us more code?