Exception Error Handling Log Maintenance in a Text File: Part 1. Normally when we do coding in our program we usually do the try catch finally statement for exception handling. Then an exception might occur for your database related operation or some system level operation. So when the exception happens we would display the exception message like: "ex. Now for a software project in production if an exception happens and if we include in the exception error handling log the inner exceptions then we can easily identify the specific error and where it got stuck. Because the end user can see the error but for fixing that exception issue the developer should know the details of that exception. So for that it's a very good way to keep log the program exception.
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Here Mudassar Ahmed Khan has explained with an example, how to create a simple Error Log Text File in ASP.Net using C# and VB.Net. Writing or Logging errors. How to create temporary text file. Please tell me this is an assignment from another dickhole professor. I always just use the File.ReadAllText(strFilePath.
This article demonstrates how to read from and write to a text file by using Microsoft Visual Basic 2005 or Microsoft Visual Basic.NET.
Now in this article I will create a class library where there will be 2 methods. After that I will make this class library a "dll" where we can use this dll in multiple projects. Create. Error. Message()This method is for preparing the error message derived from the Exception Object. Lof. File. Write()This method is for writting the Log file with message parameter. Now let's start to create the program.
I updated your question with the code snippet. After proper indenting, it is immediately clear what the problem is: you use File.Create() but don't close the. How to Write to a Text File in VB.NET Create, Read, Write, Copy, Move and Delete a Text File. vb.net - Write mutiple lines to a text file using Visual. This article demonstrates different ways to create a text file in C#. In this article I will describe how to log program exceptions and save into a text file. Introduction. It is often a common requirement in a web application to have the ability to download some sort of file to the client's computer. This article will.
Step 1: First create a Windows class library project. Give it the name "Error. Handling": Step 2: Now I will create the first method. That is "Create. Error. Message". The coding ispublicstaticstring Create. Error. Message(Exception service. Exception){String.
Builder message. Builder = new. String. Builder(); try {message. Builder. Append("The Exception is: -"); message.
Builder. Append("Exception : : " + service. Exception. To. String()); if (service. Exception. Inner.
Exception != null){ message. Builder. Append("Inner. Exception : : " + service.
Exception. Inner. Exception. To. String()); }return message. Builder. To. String(); }catch {message.
Builder. Append("Exception: : Unknown Exception."); return message. Builder. To. String(); } }I create the method as a static method so when we use the dll we don't need to create the object. Step 3: Now the 2nd method is: publicstaticvoid Log. File. Write(string message){File. Stream file. Stream = null; Stream. Writer stream. Writer = null; try {string log. File. Path = "c: \\Log.
Error\\"; log. File. Path = log.
File. Path + "Program. Log" + "- " + Date. Time. Today. To. String("yyyy. MMdd") + "." + "txt"; if (log. File. Path. Equals("")) return; #region Create the Log file directory if it does not exists Directory. Info log. Dir. Info = null; File. Info log. File. Info = new.
File. Info(log. File. Path); log. Dir. Info = new.
Directory. Info(log. File. Info. Directory. Name); if (! log.
Dir. Info. Exists) log. Dir. Info. Create(); #endregion Create the Log file directory if it does not exists if (!
File. Info. Exists){file. Stream = log. File. Info. Create(); }else {file. Stream = new. File. Stream(log. File. Path, File. Mode. Append); }stream.
Writer = new. Stream. Writer(file. Stream); stream.
Writer. Write. Line(message); }finally {if (stream. Writer != null) stream. Writer. Close(); if (file.
Stream != null) file. Stream. Close(); } }Now the final code of that class is: using System; using System. Collections. Generic; using System. Linq; using System. Text; using System.
IO; namespace Error. Handiling{publicclass. Class. 1 {///< summary> /// This method is for preapare the error massage on base of Exception Object ///< /summary> ///< param name="service. Exception"> < /param> ///< returns> < /returns> publicstaticstring Create. Error. Message(Exception service. Exception){String. Builder message. Builder = new.
String. Builder(); try {message. Builder. Append("The Exception is: -"); message.
Builder. Append("Exception : : " + service. Exception. To. String()); if (service. Exception. Inner. Exception != null){message. Builder. Append("Inner.
Exception : : " + service. Exception. Inner. Exception. To. String()); }return message. Builder. To. String(); }catch {message.
Builder. Append("Exception: : Unknown Exception."); return message. Builder. To. String(); } } ///< summary> /// This method is for writting the Log file with message parameter ///< /summary> ///< param name="message"> < /param> publicstaticvoid Log. File. Write(string message){File.
Stream file. Stream = null; Stream. Writer stream. Writer = null; try {string log. File. Path = "c: \\Log. Error\\"; log.
File. Path = log. File. Path + "Program. Log" + "- " + Date. Time. Today. To. String("yyyy. MMdd") + "." + "txt"; if (log.
File. Path. Equals("")) return; #region Create the Log file directory if it does not exists Directory. Info log. Dir. Info = null; File. Info log. File. Info = new. File. Info(log. File.
Path); log. Dir. Info = new. Directory. Info(log. File. Info. Directory.
Name); if (! log. Dir. Info. Exists) log. Dir. Info. Create(); #endregion Create the Log file directory if it does not exists if (! File. Info. Exists){file.
Stream = log. File. Info. Create(); }else {file. Stream = new. File. Stream(log. File. Path, File. Mode.
Append); }stream. Writer = new. Stream. Writer(file. Stream); stream. Writer. Write. Line(message); }finally {if (stream. Writer != null) stream. Writer. Close(); if (file. Stream != null) file.
Stream. Close(); }}}}So here we have seen how these two methods handle the log maintenance for exceptions. Just build the application and we will get the 'dll' of the project.
In my next article I will explain how this "dll" can be used to log the exception and also in the logtext file what it looks like. Conclusion: So in this method we know how to handle and log the Exception error in a text file.
Visual Basic . NET Tutorial 3. How to Create and Write to a Text File in VB . NETVer. Г¶ffentlicht am 1. How to Write Text to a File. How to Write to a Text File in VB .
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