System.Reflection.TargetInvocationException

[faramarz_s]

اصل برنامه ساده و کاملا مشخص است:::ارسال نامه به فردی از طریق وبفرمها

using System;

using System.Configuration;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Data.SqlClient;

using System.Drawing;

using System.Web;

using System.Web.Mail;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;



namespace sendMail

{

	/// <summary>

	/// Summary description for WebForm1.

	/// </summary>

	public class WebForm1 : System.Web.UI.Page

	{

		protected System.Web.UI.WebControls.Label Label2;

		protected System.Web.UI.WebControls.Label Label3;

		protected System.Web.UI.WebControls.TextBox TextBox1;

		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;

		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;

		protected System.Web.UI.WebControls.Button Button1;

		protected System.Web.UI.WebControls.Label Label4;

		protected System.Web.UI.WebControls.TextBox TextBox3;

		protected System.Web.UI.WebControls.Label lblResult;

		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator3;

		protected System.Web.UI.WebControls.Label Label1;

		protected System.Web.UI.WebControls.RegularExpressionValidat  or RegularExpressionValidator1;

		protected System.Web.UI.WebControls.TextBox TextBox2;

	

		

		public string getConnectionStrFromWebConfig(string webConfigKey_ConnectionStr) 

		{ 

			// the best way for getting state from web.config 

			return System.Configuration.ConfigurationSettings.AppSett  ings[webConfigKey_ConnectionStr]; 

		}

		

		private void Page_Load(object sender, System.EventArgs e)

		{

			// Put user code to initialize the page here

		}



		#region Web Form Designer generated code

		override protected void OnInit(EventArgs e)

		{

			//

			// CODEGEN: This call is required by the ASP.NET Web Form Designer.

			//

			InitializeComponent();

			base.OnInit(e);

		}

		

		/// <summary>

		/// Required method for Designer support - do not modify

		/// the contents of this method with the code editor.

		/// </summary>

		private void InitializeComponent()

		{    

			this.Button1.Click += new System.EventHandler(this.Button1_Click);

			this.Load += new System.EventHandler(this.Page_Load);



		}

		#endregion



		private void Button1_Click(object sender, System.EventArgs e)

		{

			try

			{

				MailMessage Mailer = new MailMessage();

				Mailer.From = TextBox1.Text;

				Mailer.To = "faramarz_s@hotmail.com";

				Mailer.Subject = TextBox2.Text;

				Mailer.Body = TextBox3.Text;				

				Mailer.BodyFormat = System.Web.Mail.MailFormat.Html;

				SmtpMail.Send(Mailer);

				lblResult.Visible=true;

				lblResult.Text="نامه شما با موفقیت ارسال گردید";		

			}

			catch(Exception ex)

			{

				lblResult.Visible=true;

				lblResult.Text = "خطا در ارسال نامه! " + ex.ToString();

			}

		}

	}

}

نتیجه امتحان برنامه بر روی هاست:

خطا در ارسال نامه! System.Web.HttpException: Could not access 'CDO.Message' object. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Runtime.InteropServices.COMException (0x80040220): The "SendUsing" configuration value is invalid. --- End of inner exception stack trace --- at System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) at System.RuntimeType.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParameters) at System.Web.Mail.LateBoundAccessHelper.CallMethod&#  40;Object obj, String methodName, Object[] args) --- End of inner exception stack trace --- at System.Web.Mail.LateBoundAccessHelper.CallMethod&#  40;Object obj, String methodName, Object[] args) at System.Web.Mail.CdoSysHelper.Send(MailMessage message) at System.Web.Mail.SmtpMail.Send(MailMessage message) at sendMail.WebForm1.Button1_Click(Object sender, EventArgs e) in d:\inetpub\wwwroot\projects\sendmail\default.a  spx.cs:line 80  

[Vahid_Nasiri]

چرا smptMailserver را مشخص نکرده اید؟

[faramarz_s]

1-مگر بطور دیفالت مقدار دهی نمیشود؟
2-در ضمن سورس فوق عین MSDNمی باشد و تعجب می کنم ایراد داشته باشد.
3- در هر صورت جمله یا جملاتی را که باید بیافزایم را بفرمایید.
با تشکر

[Vahid_Nasiri]

این را تست کنید و نتیجه را اعلام بفرمایید:

private void Button1_Click(object sender, System.EventArgs e)

        {                

            MailMessage mail = new MailMessage();

            

            mail.From = "gabor.erdi@sap.com";

            mail.To    = "gabor.erdi@sap.com";

            mail.Subject = "New ad-hoc request was posted";

            mail.Body = "There is new ad-hoc request";

            mail.BodyFormat = MailFormat.Text;



            SmtpMail.SmtpServer = "localhost";

            

            SmtpMail.Send(mail);        



        }

[Vahid_Nasiri]

نکته اش این است:

I had a similar problem - had to add SMTPServer = "localhost"

and go to IIS > SMTP Server > right click Properties > Access tab > Click the Relay button > Add > in the IP address 127.0.0.1 - this is localhost.

مرجع :
http://p2p.wrox.com/topic.asp?TOPIC_ID=4959

[faramarz_s]

جناب نصیری؛
اصولا SMTP SERVER را در کلاینت نصب نکرده ام اما برنامه را روی هاست وب ماتریکس امتحان نموده و دقیقا همین پیغم را میدهد!
آنجا که دیگر لوکال هاست معنی ندارد!
در ضمن عین این برنامه قبلا جواب می داد!!!
با اینحال شما بفرمایید...

[faramarz_s]

The transport failed to connect to the server. 

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 



Exception Details: System.Runtime.InteropServices.COMException: The transport failed to connect to the server. 



Source Error: 





Line 104:			SmtpMail.SmtpServer = "localhost"; 

Line 105:            

Line 106:			SmtpMail.Send(mail);   

Line 107:		}

Line 108:	}