replace item in a List

[baba123]

I would like to conditionally replace the value of an item in a list.

How can I achieve that task ?

For example :

public Value ( int barnumber, double price)
{ barnumbe r= BarCount;
price = Price; }

private List<Value> xx = new List<Value>();

then on the OnBarUpdate() method , I add values to my xx until it contain n values (barnumber,price).

now I want to replace "price" on the i-th row of my list when Condition1 is met.
How do I do that ?

[bukkan]

see this to get an idea.

http://www.volumedigger.com/NinjaTrader/Strategies/dsChartTrader.aspx

[NinjaTrader_Brett]

Hello,

Thanks for your forum post.

Please see the following link specifically Inserting Elements sections.

http://dotnetperls.com/list

Let me know if I can be of further assistance.

[baba123]

Thank you Brett for your reply.

If I understand well,I shoud "RemoveAt(i)" first and then use "xx.Insert(i,barcount,newprice)" (not sure of the Insert part since my List contains 2 elements on each row,could you confirm ?).

By the way,I was wondering if there is a more proper way to do it ?

[NinjaTrader_Brett]

Hello,

This is how I would do it.

Let me know if I can be of further assistance.

[baba123]

It does not work since insert method only take 2 arguments (index,item).

I cannot write xx.Insert(i,barnumber,newprice).

Any help would be highly appreciated

[NinjaTrader_JoshP]

baba123,

If it only takes 2 parameters, then you will need to use a signature with only 2 parameters. This is a more general C# programming concepts and I would highly recommend trying to search google for some examples of how to achieve what you want with either Lists or ArrayLists.

[baba123]

I just figure it out. It works fine exept in the log file I get the following error message :

Error on calling the OnBarUpdate on bar 502(lastbar) : You are accessing an index with a value that is invalid since its out of range

I printed the first calculation I made ie :

if (CurrentBar < period)
return;
else
{

Cvalue.Set(SMA(Close,period)[0]);
Print(Cvalue[0]);
....

Is there something wrong with the SMA or am I doing something wrong ?

that is when I get the error message

[NinjaTrader_Brett]

Hello,

I believe you want this:

if (CurrentBar > period)