MC75 Using Symbol.imaging.device Libraries For Program?
Jan 7, 2010
I have a .net application running on a symbol mc75 (motorola) using the scanner. I am now trying to add functionality for the camera and I am running into issues.
To find the 'devices' you are supposed to use the library's 'available devices' function.
With the barcode it is symbol.barcode.devices.availabledevices and it returns two items (you can scan from the scanner or using the camera device) However, when I do the camera library it does not find any devices - symbol.imaging.devices.availabledevices returns 0
I can take a picture using the software on the mc75, so I know the functionality is there, I just can't figure out how to get to it programmatically..
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We are trying to modify a program to control a usb relay device. Essentially what the program originally does is give you a series of check boxes that you check to make the relay fire. We tried to modify the code so that the box is checked after 5 seconds using a counter and an if statement. It works, but only partially, what happens is the check box shows a check, but the even that is normally triggered does not happen. [code]
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Dim doc set doc = CreateObject("MODI.Document") msgbox "Task completed."
But when I translate it to vb.Net I get the error above:
Dim doc As Object = CreateObject("MODI.Document")
[Code]...
I tried unregistering the DLL (I know it unregistered because the script stopped working) and then I reregistered it again (whence the script started working again), but I still get the error in VB.Net.
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Would it be easier (or possible) to code for that from within the program, or with the EXE file's settings?
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What I need is to create a very simple application that sends control signals or voltages out to an external device connected via serial perhaps. The external device will in turn trigger some electromechanical devices. There needs to be 24 independent controls each with a simple command equivalent to on or off. What is important is being able to control the timings of the on and off on each control.[code]....
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Example:
PrjctA makes reference to LibA, LibB, LibC, & LibD.If LibA references LibB & LibC also will this fail?
I have spent the best part of a day to try and get metadata out of a jpg.
Function getmetadata(ByVal f As String) As String Dim txt As String Dim fs As New System.IO.FileStream(f, FileMode.Open, FileAccess.Read, FileShare.Read)
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Unfortunately, Lib2 is not backward compatible with Lib1. What's worse is that they both use the same namespace Product.Common.
How do I use Lib2 and Lib1 in the same project? Right now if I add references to both of them, VS tells me that certain classes are ambiguous (which makes sense, since they using the same namespace).
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Whats the benefit of using DLL's instead of just creating a bunch of modules in my application to store my functions? I have read that another benefit of using DLL's is they are easier to maintain and update as you can update the DLL rather than your entire application. I dont quite understand this, as if you are going to utilize new and updated functions you have added to your DLL's, then you will need to update the code that calls them as well. So again i don't see the benefit in using DLL's in my application.
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Can you not use Try.. Catch blocks in external libraries? If not, how are you suppose to handle errors in these functions?
