473,595 Members | 2,468 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

error: An object reference is required for the nonstatic field......



Hi

When I run this code:

using System;

namespace DelegateProject
{
public delegate void MyDelegate(stri ng s);

class Class1
{

public void SayHello(string s)
{
Console.Write(s );
}

static void Main(string[] args)
{
MyDelegate MyInstDel = new MyDelegate(SayH ello);
MyInstDel("Hell o");
}
}
}

I get the error:

An object reference is required for the nonstatic field, method, or
property 'DelegateProjec t.Class1.SayHel lo(string)'
??

What could be wrong?

thanks

Bert Effmans
*** Sent via Developersdex http://www.developersdex.com ***
Feb 16 '06 #1
2 11232
Hi.

This is because you calling non static method in a static method (main)

change the declaration of SayHello to

pubic static void SayHello(string s)
class Class1

{

public static void SayHello(string s)

{

Console.Write(s );

}

static void Main(string[] args)

{

MyDelegate MyInstDel = new MyDelegate(SayH ello);

MyInstDel("Hell o");

}
}

Regards
Vinu

<Beffmans> wrote in message news:uv******** ******@TK2MSFTN GP09.phx.gbl...


Hi

When I run this code:

using System;

namespace DelegateProject
{
public delegate void MyDelegate(stri ng s);

class Class1
{

public void SayHello(string s)
{
Console.Write(s );
}

static void Main(string[] args)
{
MyDelegate MyInstDel = new MyDelegate(SayH ello);
MyInstDel("Hell o");
}
}
}

I get the error:

An object reference is required for the nonstatic field, method, or
property 'DelegateProjec t.Class1.SayHel lo(string)'
??

What could be wrong?

thanks

Bert Effmans
*** Sent via Developersdex http://www.developersdex.com ***

Feb 16 '06 #2
Hi,
main is a static method, it's not associated with any instance, SayHello is
an instace method, you need to create an instance before call it, change
your code to:

static void Main(string[] args)
{
Class1 instance = new Class1();
MyDelegate MyInstDel = new MyDelegate( instance.SayHel lo);
MyInstDel("Hell o");
}

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

Feb 16 '06 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

8
2960
by: Jinesh | last post by:
I illustrate the compiler error I get using the following example. --------------------------------------------------------------- Class ClassName { private: static const int constVarName = 100; void functionName(int parameterName) }; void ClassName::functionName(int parameterName=constVarName)
6
1465
by: WayneD | last post by:
Hi All, Just got started in C#... Here's some C# code: public MyClass { private MyThingy m_Thingy;
1
1156
by: Ray Cheung | last post by:
I am starting to realize that there are differences in vb.net and c#: in terms of syntax, object and keyword in small or big letter In the routine below, I got this error message in c An object reference is required for the nonstatic field, method, or property 'System.Web.UI.Page.MapPath(string) But I would not get an error messaage if this same code is converted in vb. Please help. I am new in c# private static void getnow(string...
5
2397
by: Peter | last post by:
Hi, I have a COM object in a dll and it is registered on the system. The COM object was made with Borland C++ Builder and works nicely when used in BC++ projects. I'm TOTALLY new to .NET (first day) and I have no clue how to use make use of the COM object. I made a small test app with a button and now I'm stuck ;-))
6
1549
by: Laura Carr | last post by:
I have been getting the following error fro an event in an rpx.cs file. The error is as follows: An object reference is required for the nonstatic field, method, or property 'DataDynamics.ActiveReports.ActiveReport.Sections' Can someone point me in the right direction in terms of where I am going wrong. private void Detail_Format(object sender, System.EventArgs eArgs) {
6
1315
by: tshad | last post by:
I am getting the following error for: C:\VSProjects\ClassLibrary4\NewHire.cs(72): An object reference is required for the nonstatic field, method, or property 'MyFunctions.NewHire.firstName' My program looks something like: public class NewHire { private string firstName = "";
9
1387
by: tshad | last post by:
Why does this not work? Can't I call a function directly from within a class? I also tried this with public in place of private. I get the following error: An object reference is required for the nonstatic field, method, or property 'MultiNamespaces.Class1.displayHeadline()' The code is:
3
3938
by: hazz | last post by:
Why do I get this error for this simple console app. It is complaining about the 'timer1_Elapsed' argument in System.Timers.ElapsedEventHandler(timer1_Elapsed); An object reference is required for the nonstatic field, method, or property 'TestTimerIntervalFromConfig.Class1.timer1_Elapsed(object, System.Timers.ElapsedEventArgs)' using System;
0
1087
by: manicmax | last post by:
Hey I have a question for u I am taking connection string from IIS like this readonly string dataSource3 =ConfigurationManager.ConnectionStrings.ConnectionString; and using this dataSource3 variable above the page_load (to make this connection obj global) SqlConnection dbConn_data = new SqlConnection(dataSource3); But....
0
7955
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
8261
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
8251
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
6674
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
3873
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
3911
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
2391
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
1
1490
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
0
1223
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.