WiX CustomActionData在名为CustomAction的位置为空

Question

once again I'm stuck at a problem, that is probably easy to solve.
I want to extend a setup, created with WiX, to make changes in the configuration file of the installed program. In order to do this I've created a CustomAction . To be able to change the configuration file, I need to know the (install-)location of it within my CustomAction . Therefore I try passing the INSTALLLOCATION and Filename to my CustomAction . Here lies the problem: The CustomActionData -Attribute is always empty and the setup throws an exception.

My CustomAction is a C# DLL file: DemoDatumErzeugen.CA.dll . It contains a method DatumEintragen which modifies the configuration file. I'm trying to access the data this way:

string path = session.CustomActionData["LOCATION"];

This is where the exception is thrown. I only got the German error message, but it says something along the lines: The supplied key was not found in the dictionary ( Der angegebene Schlüssel war nicht im Wörterbuch angegeben. ).

This is how I try passing the properties from my setup-script to my custom action:

<Binary Id="DemoDatumEinrichtenCA" SourceFile="DemoDatumErzeugen.CA.dll"/>

<CustomAction Id="DemoDatum.SetProperty" Return="check" Property="DatumEintragen" Value="LOCATION=[INSTALLLOCATION];NAME=StrategieplanConfig.xml;"/>
<CustomAction Id="DemoDatum" BinaryKey="DemoDatumEinrichtenCA" DllEntry="DatumEintragen" Execute="deferred" Return="check" HideTarget="no"/>

<InstallExecuteSequence>
  <Custom Action="DemoDatum.SetProperty" After="InstallFiles"/>
  <Custom Action="DemoDatum" After="DemoDatum.SetProperty"/>
</InstallExecuteSequence>

I've seen many examples where it was done the same way or at least very similar. I've tried many things but nothing seems to help like changing the value After in <Custom Action="DemoDatum.SetProperty" After="InstallFiles"/> . CustomActionData is always zero.
I check it with: session.CustomActionData.Count
Once again I'm pretty thankful for any help or hints where I've done something wrong.

Answer 1

The Property attribute value of DemoDatum.SetProperty should be equal to the Id attribute value of the deferred action. So, either change the property name to DemoDatum , or change the Id of the deferred action to DatumEintragen .