如何從Web.config文件

Question

讀system.net/mailSettings/smtp這是我web.config郵件設置：

<system.net> 
    <mailSettings> 
     <smtp deliveryMethod="Network" from="smthg@smthg.net"> 
     <network defaultCredentials="true" host="localhost" port="587" userName="smthg@smthg.net" password="123456"/> 
     </smtp> 
    </mailSettings> 
    </system.net> 

這裏就是我試圖從讀出的值web.config

var smtp = new System.Net.Mail.SmtpClient(); 
var credential = new System.Net.Configuration.SmtpSection().Network; 

string strHost = smtp.Host; 
int port = smtp.Port; 
string strUserName = credential.UserName; 
string strFromPass = credential.Password; 

但憑據始終爲空。我怎樣才能訪問這些值？

Answer 1

通過使用配置，下面一行：

var smtp = new System.Net.Mail.SmtpClient(); 

將使用配置的值 - 你不需要訪問，並再次將它們分配。

---

至於null價值觀 - 你試圖訪問不正確的配置值。您只是創建一個空的SmtpSection而不是從配置中讀取它。

var smtpSection = (SmtpSection)ConfigurationManager.GetSection("<the section name>"); 
var credentials == smtpSection.Network; 

Answer 2

我想如果你有defaultCredentials =「true」設置你將有憑據= null，因爲你沒有使用它們。

當您調用.Send方法時發送電子郵件嗎？

所以

這是我的web配置郵件設置：

<system.net> 
    <mailSettings> 
     <smtp deliveryMethod="Network" from="smthg@smthg.net"> 
     <network defaultCredentials="false" host="localhost" port="587" 
      userName="smthg@smthg.net" password="123456"/> 
     </smtp> 
    </mailSettings> 
</system.net> 

，這是CS

SmtpClient smtpClient = new SmtpClient(); 

string smtpDetails = 
    @" 
    DeliveryMethod = {0}, 
    Host = {1}, 
    PickupDirectoryLocation = {2}, 
    Port = {3}, 
    TargetName = {4}, 
    UseDefaultCredentials = {5}"; 

Console.WriteLine(smtpDetails, 
    smtpClient.DeliveryMethod.ToString(), 
    smtpClient.Host, 
    smtpClient.PickupDirectoryLocation == null 
     ? "Not Set" 
     : smtpClient.PickupDirectoryLocation.ToString(), 
    smtpClient.Port, 
    smtpClient.TargetName, 
    smtpClient.UseDefaultCredentials.ToString) 
); 

Answer 3

確保你的應用程序

Answer 4

有參考System.Net

由於沒有答案被接受，而其他人都沒有爲我工作：

using System.Configuration; 
using System.Net.Configuration; 
// snip... 
var smtpSection = (SmtpSection)ConfigurationManager.GetSection("system.net/mailSettings/smtp"); 
string username = smtpSection.Network.UserName; 

Answer 5

  //You can access the network credentials in the following way. 
      //Read the SmtpClient section from the config file  
      var smtp = new System.Net.Mail.SmtpClient(); 
      //Cast the newtwork credentials in to the NetworkCredential class and use it . 
      var credential = (System.Net.NetworkCredential)smtp.Credentials; 
      string strHost = smtp.Host; 
      int port = smtp.Port; 
      string strUserName = credential.UserName; 
      string strFromPass = credential.Password; 

Answer 6

這是沒有必要使用ConfigurationManager和手動獲取值。簡單實例化一個SmtpClient就足夠了。

SmtpClient client = new SmtpClient(); 

這是MSDN說：

此構造通過在應用程序或設備配置文件中的設置初始化主機，憑證和港口新SmtpClient屬性。

Scott Guthrie在前段時間寫了一個小的post。

Answer 7

設置defaultCredentials =「false」，因爲當它設置爲true時，不使用憑證。