Log exception to file in c# .net core application explained

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In production environment when any bug gets reported at that time as developer wants to get the exception details of bug to resolve the issue on high priority.
In some case there might be situation where exception is not logged in table but developer wants to check the bug immediately. for that purpose we need to write the
exception details including stack trace of bug in file. To implement this easily i am going to demonstrate the implementation of custom logging in file as below.

First we need to construct the exception and logger method in custom logger class as shown below.


public class CustomLogger { public static List<string> ConstructExceptionDetails(Exception ex,string FunctionName) { return new List<string>() { $"{DateTime.Now} - {FunctionName}", $"Exception: {ex.Message}", $"StackTrace: {ex.StackTrace}", $"InnerException: {ex.InnerException?.…
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Send bulk Email in asp.net using excel file

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When you want to send the mail to multiple person email id and your data exists in the excel file like email address and his name. you can accomplish this task using asp.net and c#. In C# under System.Net.Mail and System.Net namespace you can use classes which can help us to send mail effortlessly.

I am giving some sample code to understand the concept

Following is aspx design Page Sample


<%@ Page Language="C#" AutoEventWireup="true" CodeFile="LogDatails.aspx.cs" Inherits="LogDatails" %> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml" > 
<head runat="server"> 
    <title>Untitled Page</title> 
</head> 
<body> 
    <form id="form1" runat="server"> 
    <div> 
    <a href="Default.aspx">Back</a> 
        <asp:GridView ID="GridView1" runat="server" AllowPaging="True"  PageSize="6" AutoGenerateColumns="False" CellPadding="4" DataSourceID="XmlDataSource1" ForeColor="#333333" GridLines="None"> 
            <RowStyle BackColor="#F7F6F3" ForeColor="#333333" /> 
            <Columns> 
                <asp:BoundField DataField="Message" HeaderText="Message" SortExpression="Message" /> 
                <asp:BoundField DataField="Date" HeaderText="Date" SortExpression="Date" /> 
            </Columns> 
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> 
            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" /> 
            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" /> 
            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> 
            <EditRowStyle BackColor="#999999" /> 
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" /> 
        </asp:GridView> 
        <asp:XmlDataSource ID="XmlDataSource1" runat="server" DataFile="~/myLog.xml"></asp:XmlDataSource> 
    </div> 
    </form> 
</body> 
</html>


and the following is aspx.cs Page sample



using System; 
using System.Data; 
using System.Configuration; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.Net.Mail; 
using System.Net; 
using System.Data.OleDb; 
using System.Xml; 
using System.IO; 
public partial class _Default : System.Web.UI.Page
{ 
    XmlTextWriter writer; 
    protected void Page_Load(object sender, EventArgs e)
    { 

    } 
    protected void btnSend_Click(object sender, EventArgs e)
    {  
        SmtpClient client = new SmtpClient("smtp.gmail.com");//Host Name 
        MailMessage msg = new MailMessage(); 
        NetworkCredential account = new NetworkCredential("something@gmail.com", ""); //User Name Password of Ur Email  

        bool fileExist = false;


        MailAddress from = new MailAddress("something@gmail.com", "something"); //From Name 



        OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.oledb.4.0;Data Source=" + Server.MapPath("~/Email.xls") + ";Extended Properties=Excel 8.0"); 
        string temp = OleDbMetaDataCollectionNames.Tables; 
        con.Open(); 
        DataTable dtsheetNames = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,null); 
        con.Close(); 
        OleDbDataAdapter Sda = new OleDbDataAdapter("Select * from ["+dtsheetNames.Rows[0]["TABLE_NAME"]+"]",con); 
        DataTable dt=new DataTable("hello"); 
         
        Sda.Fill(dt); 
         
        lblStatus.Text = dt.Rows[0]["Name"].ToString(); 

        if (File.Exists(Server.MapPath(".") + "/myLog.xml") == true) 
        { 
            fileExist = true; 
         
        } 
        if (fileExist != true)
        { 
            createXml("", "", Server.MapPath(".") + "/myLog.xml", false, false);
        } 
        foreach (DataRow dr in dt.Rows)
        { 
             
          
            msg.From = from; 
              
            msg.To.Add(dr["Email"].ToString()); 
            msg.Body = txtBody.Text; 
            msg.IsBodyHtml = true; 
            msg.Subject = txtSubject.Text; 
            client.EnableSsl = true; 
            client.UseDefaultCredentials = false; 
            client.Credentials = account; 
            try 
            { 
                client.Send(msg); 
                lblStatus.Text =  lblStatus.Text+"Successully Sent Mail To \"" + dr["Name"].ToString() + "\" for the Email Id \"" + dr["Email"].ToString() + "\" <br>"; 
                if (fileExist != true)
                    createXml("Successully Sent Mail To \"" + dr["Name"].ToString() + "\" for the Email Id \"" + dr["Email"].ToString() + "\"", DateTime.Now.ToString("dd-MMM-yyyy hh:mm"), Server.MapPath(".") + "/myLog.xml", true, false); 
                else 
                    getxml("Successully Sent Mail To \"" + dr["Name"].ToString() + "\" for the Email Id \"" + dr["Email"].ToString() + "\"", DateTime.Now.ToString("dd-MMM-yyyy hh:mm"), Server.MapPath(".") + "/myLog.xml"); 
                  
            } 
            catch (Exception ex) 
            { 
                lblStatus.Text = lblStatus.Text + "Error sending Mail To \"" + dr["Name"].ToString() + "\" for the Email Id \"" + dr["Email"].ToString() + "\"<br>"; 

                if (fileExist != true)
                    createXml("Error sending Mail To \"" + dr["Name"].ToString() + "\" for the Email Id \"" + dr["Email"].ToString() + "\"", DateTime.Now.ToString("dd-MMM-yyyy hh:mm"), Server.MapPath(".") + "/myLog.xml", true, false); 
                else 
                    getxml("Error sending Mail To \"" + dr["Name"].ToString() + "\" for the Email Id \"" + dr["Email"].ToString() + "\"", DateTime.Now.ToString("dd-MMM-yyyy hh:mm"), Server.MapPath(".") + "/myLog.xml"); 
            
            } 
          
        } 
        if(!fileExist) 
        createXml("", "", Server.MapPath(".") + "/myLog.xml", false, true); 
    } 
    public void getxml(string message,string date,string fileName) 
    { 
        XmlDocument doc = new XmlDocument(); 
        doc.Load(fileName); 
        XmlElement el = doc.CreateElement("LogTable"); 
        el.SetAttribute("Message",message); 

        el.SetAttribute("Date", date); ; 
         
        doc.DocumentElement.AppendChild(el); 
        doc.Save(fileName); 
    } 
    public void createXml(string message, string date, string fileName, bool ischild, bool isendEle)
    { 
        if (ischild == false && isendEle==false) 
        { 
            writer = new XmlTextWriter(Server.MapPath(".") + "/myLog.xml", null); 

            writer.WriteStartDocument(); 
            writer.WriteStartElement("EmailLog"); 
        } 
        else 
        { 
            if (isendEle == false)
            { 
                writer.WriteStartElement("LogTable"); 
                writer.WriteAttributeString("Message", message); 
          


            writer.WriteAttributeString("Date", date); 
            writer.WriteEndElement();   } 
        } 
        if (isendEle == true)
        { 
            writer.WriteEndElement(); 
            writer.Close(); 
        } 
    } 
}

The above code reads the excel file and iterates each email id. This code also stores the logs of each mail sent into xml file for the reference. this code is ideal for the sending bulk emails using code. above code can be used as class library in project to reuse in different modules of project.

I Hope that you will benefited by the above code.

Hoppy Coding:)

Comments

  1. UnknownJune 6, 2012 at 2:42 AM

    its very nice that i stumbled upon your website..it was really a wonderful read...i will bookmark your website and will take the rss feed also...thanks for sharing...

    bulk email server

    ReplyDelete
  2. Vinay SinghDecember 11, 2012 at 3:24 AM

    If you need to build up a distribution lists you can get third parties to send on your behalf (the recipients of these e-mails have either signed up for this service or are content to see appropriate adverts within their mail).


    Best Email Marketing Software

    ReplyDelete
  3. klotyldaMarch 31, 2018 at 2:20 AM

    Awesome. I always make sure I'm building high quality lists by removing the invalid addresses as soon as I can. Luckily, thanks to my favourite mass email checker, correct.email, it's really just a piece of cake.

    ReplyDelete

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