C# Error Object
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C# Error Code -2147467259
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C# Exceptions List
arguments Object Array Object Boolean Object Date Object Enumerator Object Error Object Error Object Properties and Methods Function Object Global Object Math Object Number Object Object Object RegExp Object Regular Expression Object String Object VBArray throw exception c# Object TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Error Object Visual Studio 2010 Other Versions Visual Studio 2008 Visual Studio 2005 Visual Studio .NET 2003 Contains information about errors. There are two forms of the Error constructor. Copy function Error([description : String ]) function Error([number : Number [, c# custom exception description : String ]]) ArgumentsnumberOptional. Numeric value assigned to the error, specifying the value of the number property. Zero if omitted.descriptionOptional. Brief string that describes the error, specifying the initial value of the description and message properties. Empty string if omitted.RemarksError objects can be explicitly created using the constructor shown above. You can add properties to the Error object to expand its capabilities. An Error object is also created whenever a run-time error occurs to describe the error.Typically, an Error object is thrown with the throw statement and the expectation that it will be caught by a try...catch statement. You can use a throw statement to pass any type of data as an error; the throw statement will not implicitly create an Error object. However, by throwing an Error object, a catch block can treat JScript run-time errors and user-defined errors similarly.The Error object has four intrinsic properties: the description of the error (description and message properties), the error number (number property), and the name of the error (name property). The description and message properties refer to the same message; the description property provides backwards compatibility, while the message property complies with the ECMA standard.An error number is a 32-bit value. The upper 16-bit word is the facility code
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C# Exception Handling
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Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, https://msdn.microsoft.com/en-us/library/t9zk6eay(v=vs.100).aspx helping each other. Join them; it only takes a minute: Sign up C#, “Object reference not set to an instance of an object.” error up vote 2 down vote favorite I've got this code... namespace YellowBox { public partial class Form1 : Form { private string sid = ""; FileTransferManager fm = new FileTransferManager(); Jid _jid = http://stackoverflow.com/questions/5274921/c-object-reference-not-set-to-an-instance-of-an-object-error new Jid(); public Form1() { InitializeComponent(); fm.OnError += fm_OnError; fm.OnEnd += fm_OnEnd; fm.OnStart += fm_OnStart; fm.OnProgress += fm_OnProgress; } private void btn_pickFile_Click(object sender, System.EventArgs e) { var of = new OpenFileDialog(); if (of.ShowDialog() == DialogResult.OK) { tb_file.Text = of.FileName; var fi = new FileInfo(of.FileName); //lblSize.Text = Util.HumanReadableFileSize(fi.Length); btn_sendFile.Enabled = true; } } private void btn_sendFile_Click(object sender, System.EventArgs e) { _jid.Server = "xxx"; _jid.User = "xxx"; /// EDIT, added the _jid values. _jid.Resource = "xxx"; sid = fm.Send(_jid, tb_file.Text, ""); /// HERE IT SAYS "Object reference not set to an instance of an object." ??? btn_sendFile.Enabled = false; btn_pickFile.Enabled = false; } ... And when I hit the btn_sendFile it gives me a "Object reference not set to an instance of an object." error. But I had instanced the fm object in FileTransferManager fm = new FileTransferManager(); , didn't I? SOLVED: Appears it was missing fm.XmppClient = xmppClient; c# share|improve this question edited Mar 11 '11 at 16:20 asked Mar 11 '11 at 15:34 Roger 2,526154278 It is probab
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question https://forum.unity3d.com/threads/object-reference-not-set-to-an-instance-of-an-object-c.226430/ x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What c# error is a NullReferenceException, and how do I fix it? up vote 1313 down vote favorite 256 I have some code and when it executes, it throws a NullReferenceException, saying: Object reference not set to an instance of an object. What does this mean, and what can I do about it? c# .net vb.net null nullreferenceexception share|improve this question edited May 4 at 16:06 community c# error object wiki 21 revs, 15 users 45%John Saunders 3 in case framework based error refer my below answer stackoverflow.com/questions/779091/… –Vijay Kumbhoje Dec 17 '14 at 7:17 1 @bobby because it is such a common problem –John Saunders Mar 7 at 3:04 object pointing to null reference are almost useless.... –ΦXocę 웃 Пepeúpa ツ Jul 21 at 17:48 add a comment| 21 Answers 21 active oldest votes up vote 1391 down vote accepted What is the cause? Bottom Line You are trying to use something that is null (or Nothing in VB.NET). This means you either set it to null, or you never set it to anything at all. Like anything else, null gets passed around. If it is null in method "A", it could be that method "B" passed a null to method "A". The rest of this article goes into more detail and shows mistakes that many programmers often make which can lead to a NullReferenceException. More Specifically The runtime throwing a NullReferenceException always means the same thing: you are trying to use a reference. The reference is not initialized (or it was initialized, b
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