What is Error in 5 line code (C#) please help

Question

3.00/5 (1 vote)

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace CoMicrosEditBox
{
    public class CoMicrosEditBox: System.Windows.Forms.TextBox
    {
        {
            private List<string> _ColumnHeading = new List<string>();

            public List<string> ColumnHeading
            {
                set { _ColumnHeading = value; }
                get { return _ColumnHeading; }
            }
        }
    }

While using this CoMicrosEditBox in another application, cannot add values for ColumnHeading. Saying System.String doesn't have contructor.
But if replace string with int, it is working fine.

[edit]'<' and '>' characters escaped to make the code fragment more meaningfull! - OriginalGriff[/edit]

Posted 26-Sep-10 2:10am

CoMicros

Updated 27-Sep-10 6:07am

Toli Cuturicu

v7

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Richard MacCutchan 26-Sep-10 9:23am

Something missing from the above; where is the String that you replace with int?

E.F. Nijboer 26-Sep-10 9:34am

You might also consider renaming your class or namespace because the same can work quite confusing (eg. CoMicrosEditBox.CoMicrosEditBox)

OriginalGriff 26-Sep-10 11:14am

I replaced your < and > characters with the escaped versions < and >. If you don't then the HTML removes them together with any contents as it considers them HTML commands.
There are a set of options below the text box to use when pasting code fragments which can help with this.

OriginalGriff 26-Sep-10 11:16am

Bloody HTML! In the comment above, then second pair of less and greater than characters shoule be read as:
ampersand lt semicolon (& lt ;)
and
ampersand gt semicolon (& gt ;)

3 solutions

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Richard MacCutchan · Answer 1 · 2010-09-26T06:24:00

Solution 2

I have just tried your code (corrected for that misplaced open brace), and it compiles and runs fine. Perhaps you could post the actual snippet that fails, including the error message.

Posted 26-Sep-10 6:24am

Richard MacCutchan

Comments

Sandeep Mewara 26-Sep-10 13:13pm

:) so basically he already have a resolved issue at hand!

Richard MacCutchan 26-Sep-10 15:07pm

Dunno, Sandeep; all I'm saying is that the code posted above has no errors.

nakulkundra · Answer 2 · 2010-09-26T05:19:00

Solution 1

First add

using System.Collections;

and make your list as arraylist

Bcoz list is a generic
if you want to use generic please define the generic type "T"

___________________________________________________
Regards

Nakul Kundra
(Software Developer)

Posted 26-Sep-10 5:19am

nakulkundra

Comments

OriginalGriff 26-Sep-10 11:54am

He did - that why I edited his post. Don't forget that HTML assumes the < and > are meant for it, and swallows them unless they are escaped. In this case, (as most) swapping from a List<string> to an ArrayList would be a step back in all sorts of ways...

Toli Cuturicu · Answer 3 · 2010-09-27T06:09:00

Solution 3

Line 5 is:

using System.Windows.Forms;

There is no error in it.

Posted 27-Sep-10 6:09am

Toli Cuturicu