Cannot implicitly convert string to boolean

August 11th, 2010, 10:02 PM

Here is the code where I am trying to build a series of boolean logic steps into a string:

privatestring tradeStringLong = "TradeReset";
privatestring tradeStringShort = "TradeReset";
.
.
.
if (UseMACD)
{
tradeStringLong += " && macdSeries[0] >= macdSeries[1]";
tradeStringShort += " && macdSeries[0] < macdSeries[1]";
}
if (UseDszlDszl)
{
tradeStringLong += " && dszlDirection1 == 1 && dszlDirection2 == 1";
tradeStringShort += " && dszlDirection1 == -1 && dszlDirection2 == -1";
}
if (UseCCI)
{
tradeStringLong += " && cciDirection == 1";
tradeStringShort += " && cciDirection == -1";
}
.
.
.

So I end up with a string with different instructions depending on which indicators I want to use. Below is where I am trying to execute the code by converting the string back to useable boolean logic:

if (tradeStringLong)
GoLong();
if (tradeStringShort)
GoShort();

This does not work and I get the error message. I looked at Eval() but that is not supported. I found Boolean.Parse() but that doesn't seem to work either. Any ideas on how to make this code work?

August 11th, 2010, 10:09 PM

You should wrap code with php or code tags.

From memory only, months since I did any NT programming, but I would use approach of:

Code

                            
tradestringlong = (macdSeries[0] >= macdSeries[1] ? true : false);

and change in init to actual boolean.

Mike

August 11th, 2010, 10:28 PM

Mike

Not exactly what I had in mind, but your comments sparked another angle to get the job done. That is to just cascade the boolean throughout. I was just trying to learn something new and cool.

Thanks Mike!

G

August 12th, 2010, 12:26 AM

gordo

Mike

Not exactly what I had in mind, but your comments sparked another angle to get the job done. That is to just cascade the boolean throughout. I was just trying to learn something new and cool.

Thanks Mike!

G

Yeah actually the code I gave you was quite inefficient, but I am totally out of it lately, very sick. The condition you were evaluating was already a boolean so no need to do the true:false switch lol.

Have fun,
Mike

August 26th, 2010, 02:46 PM

gordo

Mike

Not exactly what I had in mind, but your comments sparked another angle to get the job done. That is to just cascade the boolean throughout. I was just trying to learn something new and cool.

Thanks Mike!

G

gordo,

Would you please post your solution? I may find it helpful in what I am trying to do as well!

TIA!
Jon

August 26th, 2010, 08:01 PM

You can maybe rewrite your own Eval(), using the CSharpCodeProvider class, which will compile/execute the code previously generated by the indicator.
But not efficient at all, it's for @gordo who was looking for something "new and cool", but may not to be use in serious code.

February 22nd, 2011, 04:40 PM

Trader.Jon

gordo,

Would you please post your solution? I may find it helpful in what I am trying to do as well!

TIA!
Jon

Jon

Took me MONTHS to figure this out. Better than years....I guess!

Here is what I did. I was hoping for something cooler, but this works.

Gordo

Cannot implicitly convert string to boolean

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Cannot implicitly convert string to boolean