I'm currently experimenting with App Inventor but am having trouble with my code. It the text box in my app, I want to have the ability to type a number and work out if its going to be more or less than 100 but I am getting the following message after entering any number in the text box while running the app:
"The operation < cannot accept the arguments: , [empty-string], [100]"
Any suggestions anyone? Thanks a heap in advance!
The error message is trying to tell you, that the textbox never should be empty.
To avoid that error, you might want to add another if statement like this as first statement:
if is empty Textbox1.Text
then set Textbox1.Text to 0
http://appinventor.mit.edu/explore/ai2/support/blocks/text#isempty
Also it might make more sense to use the Textbox1.Text directly without using additionally a global variable, because you set that global variable only during the Screen Initialize event...
Related
I am not sure what's wrong with the below code.
Set obj=description.Create()
obj("micClass").Value="Link"
obj("name").Value="Advertising Programs"
Set totalnobuttons=Browser("title:=.*").Page("title:=.*").ChildObjects(obj)
totalnobuttons.highlight
print totalnobuttons.count
For i=0 to totalnobuttons.count-1
print totalnobuttons(i).GetRoProperty("name")
Next
This gives an error "Object doesn't support this property or method error" during execution. I need to highlight the "Advertising Programs" program link using the above code.
Your line:
totalnobuttons.highlight
is a culprit. You are trying to highlight the whole collection of Link objects. You cannot do that. Instead, remove that line and put that in your For...Loop like this:
For i = 0 to totalnobuttons.count-1
totalnobuttons(i).HighLight
print totalnobuttons(i).GetRoProperty("name")
Next
You are trying to find collection object. Return type should be always array of objects.
Try to use advanced for loop to proceed. Find the code below:
For each button in totalnobuttons
button.HighLight
print button.GetRoProperty("name")
Next
I am new to tibco and I am working on tibco BW 5.X versions.
I have a scenario where I am working on multiple records coming in from a schema and I have to write a text file with only specific values out of those records.
Ex :
if this is the input:
<param>1</param>
<param>2</param>
<param>1</param>
<param>1</param>
I only have to write the param having values 1 and have to generate error for param having values 2 but after generating error the iteration that is currently going on should continue and must not stop.
I would be grateful if someone can help
I assume in case of the value "2" you want to invoke the "Generate Error" Activity to throw an error up to a calling process or client that some entry was not correct, right?
So if you want to make sure to process the whole list you should not throw the error in the loop group on the list as it will exit.
You can either:
Use 2 seperated lists
map the entries with value "1" into a good list that enter the loop and entries with value "2" into a bad list, that will if filled let you then invoke the "Generate Error" activity after the loop processing.
Append the entries with value "2" in your loop
Thereby after processing the loop you have these entries and if the list contains entries invoke the "Generate Error" activity.
Hope that helps
Cheers Seb
P.s.: if you upload your process it would be more clear to show ;)
You could create a output schema which contains only param1 values and use a mapper activity to perform corresponding transformation and xpath functions for filtering. If you try to implement this solution you can eliminate the chance of param2 values creeping into your output.
I'm stuck on an error in my App Inventor 2 application. I' m using three checkboxes, so the user to pass values to a timer interval in a clock component.
The values are stored in a variable as a list of three values of miliseconds (e.g. 1600, 1800, 2000). I check in code when and which checkbox is checked and then pass it over to a TinyDB database as a tag.
Problem is that, in Do it and on the device running the app, I get the following error as title suggests.
Here is the coding blocks I've used so far:
Does anyone be kind enough to direct me to how solving this error? Is it possible to pass values to a clock component through this logic. I've used a listPicker with success sometime ago, but I need it done with a checkBoxes layout. Thank you all in advance for your answers.
[Edit1]
To overcome this error and before #Taifun's remarks and suggestions, I followed the variable path, to pass values in the timer interval field. Do not now if it is very efficient but it is working for now. Here is the coding blocks:
Bracket pairs like this () represent a list.
The operation TimerInterval cannot accept the arguments: [(1800)]
This is, what the error message is trying to tell you: You are trying to assign a list, which has the item 1800 inside, to the TimerInterval property of a clock component.
You should assign the value directly instead.
Also you should think about the default value: which value should be used, if the user did not store anything in TinyDB... You are currently using an empty string in the valueIfTagNotThere socket... This does not really make sense... A better value would be for example 1000 ... same for the else part in your if-then-else statement...
I am slimming down my databases, eliminating duplicate reports where I can and creating better code. I have one database that involves our welders and foremen. In this code, I can print a report for an individual foreman, which sends the string "strActive" through openargs The report looks at strActive and on the OpenForm action, sets the filter for active, inactive, or all welders, based on the string value passed through.
It works perfectly for the single page at a time code. There, the user chooses a foreman from a list or enters the foreman's clock number. The query the report is based on uses the global string "ForemanCLK" to only get results for that welder.
Formerly, I had three reports; one for all welders, one for active welders, and one for inactive welders.
Previously, I would set a variable based on strActive and open the appropriate report using another variable in the code in place of the report name. The loop worked fine and opened the report 39 times, each time with a new foreman name and data.
I'm baffled as to why opening the report now, with an openarg, doesn't work. I only get the first foreman name, 39 times. I've verified that I get the foremanCLK variable of the different foremen by commenting out the docmd line and debug.print(ing) the various values needed by the form. The report simply doesn't load it correctly.
Set rec = CurrentDb.OpenRecordset(sql)
rec.MoveFirst
For ctr = 0 To rec.RecordCount - 1
ForemanCLK = rec(0).Value
DoCmd.OpenReport "rptForeman", acViewNormal, , , , strActive
'DoCmd.OpenReport "rptForeman", acViewNormal
rec.MoveNext
Next
The above code gets me many copies of the same foreman's report filtered by strActive
For ctr = 0 To rec.RecordCount - 1
ForemanCLK = rec(0).Value
'DoCmd.OpenReport "rptForeman", acViewNormal, , , , strActive
DoCmd.OpenReport "rptForeman", acViewNormal
rec.MoveNext
But this gets me all the different foremen, except it is not filtered.
I've tried passing in a Where clause.
acViewNormal, ,"[active]=" & True
and
acViewNormal, ,"[active]=" & False
and
acViewNormal, ,"[active]=" & True & " OR [active]=" & False
I did the same verification with the single report, and it filters correctly, but in the loop, it does not filter at all. It does, however give me the different foremen.
The big question here is...
WHY? Does access not have enough time between reports to close it and therefore it doesn't perform the operations on the open event?
Any other ideas?
You must close the report explicitly inside your loop: DoCmd.Close acReport, "rptForeman". If OpenReport is called a second time on an already-open report, the object gets the focus in access, but it doesn't re-run the Open event.
Okay, I must hang my head in shame.
I error checked the hell out of that code above using every variable except strActive.
When I added that to my debug.print line, it came up with nothing. How can that be!?!!??
I simply forgot to set that at the beginning of the sub, like I did with the other action that opens a single report. strActive is a global variable, but was not set at any other point in the code up until this piece.
Once this was added to the beginning of the sub, all worked fine.
When an error occurs in a function, I'd like to know the sequence of events that lead up to it, especially when that function is called from a dozen different places. Is there any way to retrieve the call stack in VB6, or do I have to do it the hard way (e.g., log entries in every function and error handler, etc.)?
You do have to do it the hard way, but it's not really all that hard... Seriously, once you've written the template once, it's a quick copy/paste/modify to match the function name in the Err.Raise statement to the actual function name.
Private Function DoSomething(ByVal Arg as String)
On Error GoTo Handler
Dim ThisVar as String
Dim ThatVar as Long
' Code here to implement DoSomething...
Exit Function
Handler:
Err.Raise Err.Number, , "MiscFunctions.DoSomething: " & Err.Description
End Function
When you have nested calls, this unwinds as each routine hits its Handler and adds its name to the error description. At the top level function, you get a "call stack" showing the list of routines that were called, and the error number and description of the error that actually occurred. It's not perfect, in that you don't get line numbers, but I've found that you don't usually need them to find your way to the problem. (And if you really want line numbers, you can put them in the function and reference them in the Err.Raise statement using the Erl variable. Without line numbers, that just returns 0.)
Also, note that within the function itself, you can raise your own errors with the values of interesting variables in the message like so:
Err.Raise PCLOADLETTER_ERRNUM, , "PC Load Letter error on Printer """ & PrinterName & """"
(The syntax highlighting looks wonky in the preview... I wonder how will it look when posted?)
I'm pretty sure you have to do it the hard way. At a previous job of mine, we had a very elegant error handling process for VB6 with DCOM components. However, it was a lot redundant code that had to be added to every method, so much that we had home-grown tools to insert it all for you.
I can't provide too much insight on its implementation (both because I've forgotten most of it and there's a chance they may consider it a trade secret). One thing that does stand out was that the method name couldn't be derived at run-time so it was added as a string variable (some developers would copy-paste instead of using the tool and it would lead to error stacks that lied...).
HTH
The hard, manual way is pretty much the only way. If you check out this question, someone suggested a tool called MZTools that will do much of the grunt work for you.
As other people said (years ago, I see... but there's so many people still using VB6! :) ), I think it's not possible to programmatically retrieve the Call Stack, unless you use some 3rd-party tool.
But if you need to do that for debugging purposes, you can consider of adding to the called routine an Optional input string variable, were you'll put the caller's name.
Sub MyRoutine
(...) ' Your code here
call DoSomething (Var1, Var2, Var3, "MyRoutine")
' ^
' Present routine's name -----------+
(...) ' Your code here
End Sub
Public DoSomething (DoVar1, DoVar2, DoVar3, Optional Caller as string = "[unknown]")
Debug.Print " DoSomething Routine Called. Caller = " & Caller
... ' (your code here)
End Sub
Not so elegant, maybe, but it worked for me.
Regards,
Max - Italy
Compuware (or was it Numega at the time) DevStudio for Visual Basic 6 used to do this. The way was by adding adding instrumenation to every call that called a very small snippet that added to the code stack. On any error it dumped out that callstack, and then did things like mail or post to a webserver all the debuging information. Adding and removing the instrumentation was a potentially lethal operation (especially back then, when we were using VSS as our source control), but if it worked, it work well.
As Darrel pointed out, you could add something very simlar by using MZTools and setting up a template. It's a lot of working, and is probably more effeort than the reward would be but if you have very difficult to track down bugs, it might help).