Class

TypeMismatchException

Description

Occurs when you try to assign a value to an object that is an incorrect data type.

Properties

Name	Type	Read-Only	Shared
ErrorNumber	Integer
Message	String

Methods

Name	Parameters	Returns
Constructor	message As String = "", errorCode As Integer = 0
Stack		String()
StackFrames		StackFrame()

Property descriptions

TypeMismatchException.ErrorNumber

ErrorNumber As Integer

Used to contain an error number that describes the runtime error.

TypeMismatchException.Message

Message As String

Used to contain descriptive text to display when the runtime exception is encountered.

Method descriptions

TypeMismatchException.Constructor

Constructor(message As String = "", errorCode As Integer = 0)

Note

Constructors are special methods called when you create an object with the New keyword and pass in the parameters above.

Used to raise your own RuntimeException with a message and optional error code.

TypeMismatchException.Stack

Stack As String()

Returns a String array that contains a list of all of the methods in the stack from the main entrypoint to the point at which the exception was invoked.

The stack contains all the method names up and including the current method name.

This feature only works if the IncludeFunctionNames property on the App object is selected in the Shared Build Settings.

In addition to your own method calls, you will also see framework method calls, but these may not always be completely accurate due to insufficient symbols for the OS to resolve.

TypeMismatchException.StackFrames

StackFrames As StackFrame()

Returns an array containing the stack when the exception was first raised.

Notes

A TypeMismatchException error occurs when you try to assign a value of an incorrect data type to an object. This error can occur only if the compiler cannot determine the type of the value at compile time - for example, when using variants. Ordinarily, the compiler catches incorrect typing when you try to compile the application.

Sample code

The following code assigns a picture that has been added to the Project Editor to the variant, v, and then tries to assign v to an Integer. The Exception statement displays a message box, allowing the developer to track down the problem. Exception handling prevents the built application from quitting when the error occurs.

Var v As Variant
Var i As Integer
v = ProductLogo ' a picture
i = v
Exception err
  If err IsA TypeMismatchException Then
    MessageBox("The variable i must be assigned a number!")
  End If

Compatibility

Project Types	All
Operating Systems	All