Object Reference not set to an Instance of an Object
Error
The "Object Reference not set to an Instance of an Object" error
may appear when using VB 6, Visual Studio .NET, VB .NET or C# .NET.
Solution(s):
General causes of this error include undeclared or improperly
declared controls and variables, therefore, ensure that all variables
and controls used in code are properly declared.
This error may also occur in IDAutomation
2D Font and Encoder
products if the string parameters in the FontEncode subroutine are
not initialized to a string that contains data. For example, setting
the DataToEncode string parameter to an empty text box may cause the
error because the DataToEncode property cannot be empty.
A workaround is to enable a check to test for the text box being
empty and set the DataToEncode string appropriately. For example:
Dim DataToEncode as String
Dim EncodedText as String
EncodedText = ""
If TextToEncode.Text = "" Then
DataToEncode = ""
Else
DataToEncode = TextToEncode.Text
End If
QRFontEncoder.FontEncode DataToEncode, 0, 0, 0, 0, EncodedText
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