Connecting strings togther

J

Jost aus Soest

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• Apr 20, 2012

• #2

With the assumption of

B4X:

Dim pLatMap, pLongMap As Float
Dim mGoogleMap As String

I get the expected result:

B4X:

http://maps.google.com/maps?q=33,0

 

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rfresh

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• Apr 20, 2012

• #3

Gosh, I wonder why I don't...:sign0148:

Hmmm...so I can string together Floats with Strings?

mGoogleMap = "http://maps.google.com/maps?q=" & pLatMap & "," & pLongMap

 

Last edited: Apr 20, 2012

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J

Jost aus Soest

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• Apr 20, 2012

• #4

You can concatenate everything!

For further investigations we need much more code...
How have you checked the result?

 

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rfresh

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• Apr 20, 2012

• #5

I use the Log feature to see that the Lat and Long vars are correct and they are. Then I email the whole URL string to myself and that's where the first char (the 3) of the lat is missing when I view the body of the email.

 

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rfresh

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• Apr 20, 2012

• #6

I've discovered the problem is with the '=' char in the URL string:

mGoogleMap = "http://maps.google.com/maps?q=" & pLatMap & "," & pLongMap

If I remove the = char and email myself the URL the pLatMap string has the 33. correctly. So I think this means I need to escape the URL string right?

 

Last edited: Apr 20, 2012

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rfresh

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• Apr 20, 2012

• #7

Do we have a function to escape strings?

 

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R

Roger Garstang

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• Apr 20, 2012

• #8

If you escape the = you may lose the meaning of it in the url depending on how it is escaped. URL Escaping would make it a character and not mean a separator for your GET variables. I don't think = would need escaping either, or at least it hasn't in other languages. If so it is usually with a slash (/ or \ whichever B4A uses...I just started coding in it) You could try isolating it putting it in its own quotes with & concatenating it, or maybe converting/casting the floats to strings and see if that helps. I use that very same string to pull Google Map locations in PHP and C# without converting or escaping anything.

 

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NJDude

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• Apr 20, 2012

• #9

rfresh said:

I've discovered the problem is with the '=' char in the URL string:

mGoogleMap = "http://maps.google.com/maps?q=" & pLatMap & "," & pLongMap

If I remove the = char and email myself the URL the pLatMap string has the 33. correctly. So I think this means I need to escape the URL string right?

Click to expand...

It seems there's a bug in that lib when a string has a "q=", search the forums and youl will find the thread and you'll see the workaround.

 

Last edited: Apr 20, 2012

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rfresh

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• Apr 20, 2012

• #10

I'm attaching a small test app that shows this problem. The lat string is 33.7669 and when the URL is built in the app, it is correct and Logs correctly but when the email is sent out (using gmail) when you open the email, that first char of the Lat string 33.7669 is missing so you end you end up with just 3.7669.

The problem char is the = char but I don't know how to fix this.

Thanks...

 

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• gpstest.zip

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Last edited: Apr 20, 2012

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rfresh

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• Apr 21, 2012

• #11

NJDude said:

It seems there's a bug in that lib when a string has a "q=", search the forums and youl will find the thread and you'll see the workaround.

Click to expand...

Thanks NJDude but I can't find the post with the workaround. I tried searching on q= and = bug and url bug but nothing was found?

 

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NJDude

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• Apr 21, 2012

• #12

Read the whole thread HERE

 

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rfresh

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• Apr 21, 2012

• #13

Yes, thanks for the help. Adding that fake attachment solved the problem for me.

 

Last edited: Apr 21, 2012

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