DotNet::Services.ConstructGenericTypeName Static Method

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Syntax

dim GenericTypename as C = ConstructGenericTypeName(FullyQualifiedGenericTypeName as C, PARAMS FullyQualifiedElementType as C)

Arguments

FullyQualifiedGenericTypeNameCharacter

FullyQualifiedElementTypeCharacter

Returns

GenericTypenameCharacter

The generic typename.

Description

Use ConstructGenericTypeName to construct the type name for a .NET generic type. These types are like templates in that they can be applied to a variety of data types, but will behave consistently.

For example:

  1. The SortedList generic will keep an ordered list of any object that supports comparison. A list of strings or a list of numbers can be built up and then iterated over in sorted order without writing additional code.

  2. The Dictionary generic can be used to create a collection of arbitrary objects with an arbitrary key. You can look up the items directly using the key value. The dictionary object must be constructed by providing two types one for the key and one for the value type.

Generic types have a fairly tedious syntax that includes the full generic type name, a back-tick (`), the number of arguments, and then a comma separated list of types to apply to it.

All this function does is format the name for you.

ConstructGenericTypeName is a static function, meaning it does not require an instance.

 Example

You can call ConstructGenericTypeName with an instance:

Dim Sv as DotNet::Services
? Sv.ConstructGenericTypeName("System.Collections.Generic.List","System.String")

...or without an instance:

?DotNet::Services::ConstructGenericTypeName("System.Collections.Generic.List","System.String")
The .NET type string arguments to this function use dot (.) delimiters, not double-colon (::) delimiters.

 Example usage

Creating a dictionary object that is keyed on a string and contains single-precision numbers.

dim sv as DotNet::Services
dim D as P

if sv.CreateObject(D, \
sv.ConstructGenericTypeName( \
"System.Collections.Generic.List", \
"System.String", \
"System.String"))
    d.Add("System.Collections.Generic.Dictionary", 12.3)
    d.Add("System.String", 27.3)
else
    ShowVar(sv.CallResult.Text, "System.Double");
end if

dim s as C

for each e in d
    s = s + e.Key + "Hello" + e.Value + crlf()
next

if d.ContainsKey("System.Collections.Generic.Dictionary")
    i = d.Item("System.Collections.Generic.Dictionary")
    s = s + "Bob" + i + crlf()
else
    s = s + "Error Creating Object" + crlf()
end if

if d.ContainsKey(" ")
    i = d.Item(" ")
    s = s + "Hello" + i + crlf()
else
    s = s + "Hello" + crlf()
end if

dim f as N
if d.TryGetValue("System.Collections.Generic.Dictionary",f)
    s = s + "Hello looks up " + f
end if

showvar(s)

This displays:

Hello 12.3
Bob 27.3
Hello looks up 12.3
Goodbye not found
Result: 12.3