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Once created, the
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.NET Component can be used the same way as any other Visual LANSA component.
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An instance of
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the component can be created and its properties, methods and events can be used. Some components are very simple and little programming is required to use them, others provide complex functionality and may require much more coding than using native Visual LANSA controls.
Define an instance of a component
Use the DEFINE_COM command. If the class does not Use the DEFINE_COM command. If the class does not have a constructor or has a constructor which takes no parameters then you may define the instance as either static or dynamic. Otherwise you must define the instance as dynamic:
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Variable <= *New --- Fully qualified class name ------------------ > |
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RDML Variable . .NET Property Name ----------------------------------------------- > |
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RDML Variable . Method Name ----------------------------------------------- > |
Example
C#
public void
IncrementDateByDays(
ref DateTime dateTime,
int dayAdjustment
...
)
{
dateTime = dateTime.AddDays( dayAdjustment );
...
}
RDML
Define_Com Class(#DOTNET1.TestClasses.MyClass) Name(#LClass01)
Define Field(#LDat01) Type(*DATETIME)
Define Field(#LDat02) Type(*DATETIME)
...
#LDat01 := '1954-04-25 10:04:00.000000'
#LDat02 := '1954-05-05 10:04:00.000000'
#LClass01.IncrementDateByDays( #LDat01 10 )
If ((#LDat01 = #LDat02))
…
Endif
C#
...
public String
DoubleIntegerReturnString(
int number,
out int result )
{
result = number * 2;
return String.Format( "Double
...
{0
...
} is
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{1
...
}", number, result );
...
}
RDML
Define_Com Class(#DOTNET1.TestClasses.MyClass) Name(#LClass01)
Define Field(#LNum01) Type(*INT) Length(4)
Define Field(#LNum02) Type(*INT) Length(4)
Define Field(#LStr01) Type(*CHAR) Length(80)
#LNum01 := 411
#LStr01 := #LClass4101.DoubleIntegerReturnString( #LNum01 #LNum02 )
If (#LNum02 = (#LNum01 * 2))
…
Endif
Event Handling
) If (#LNum02 = (#LNum01 * 2)) … Endif Event Handling Event handling functions are defined using the EVTROUTINE command. See the [<span style="color: #0000ee"><span style="text-decoration: underline; ">EVTROUTINE</span></span>|../../../lansa015/Content/lansa/evtroutine.htm] documentation in the Technical Reference Guide for further details about this command. The basic syntax of the command is as follows: EVTROUTINE --- HANDLING ( Variable Name . Event Name ) EVTROUTINE documentation in the Technical Reference Guide for further details about this command. The basic syntax of the command is as follows:
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EVTROUTINE --- HANDLING ( Variable Name . Event Name )------------ > |
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Example
C#
public class EventArgs1
{
private String mName;
public EventArgs1() { }
public String Name
{
get { return mName; }
set \{ mName = value; }
}
}
Public class EventTests
{
public event MyEventDelegate MyEvent;
public delegate void MyEventDelegate( String str, EventArgs1 eventArgs );
}
RDML
Define_Com Class(#DOTNET1.TestClasses.EventTests) Name(#EventTest)
Evtroutine Handling(#EventTest.MyEvent) Str(#s1) EventArgs(#c1)
#STD_TEXT := #s1
#STD_NAME := #c1.Name
Endroutine