How can I insert custom dialog before WelcomeDlg?

问题

I want to let the user select the language before start the welcome dialog in WiX, so that the installer can install the different features for each language.

So far, I have created my own custom dialog that contains ComboBox, I am aware of how to insert custom dialog between any other dialog, but I have no idea how to insert it before the WelcomeDlg.

回答1:

I have not done it but I am sure it can be easily done:

At the bottom of the WelcomeDlg you should see this:

  <InstallUISequence>
    <Show Dialog="WelcomeDlg" After="CostFinalize" Overridable="yes">NOT Installed OR PATCH</Show>
  </InstallUISequence>  

This allows you to override the dialog sequence. Schedule your custom dialog to run after CostFinalize and before WelcomeDlg. I haven't tested this but it should easily be done.

  <InstallUISequence>
    <Show Dialog="CustomDlg" After="CostFinalize">NOT Installed OR PATCH</Show>
    <Show Dialog="CustomDlg" Before="WelcomeDlg">NOT Installed OR PATCH</Show>
  </InstallUISequence>  

回答2:

Try to use Sequence attribute:

<InstallUISequence>
    <Show Dialog="SplashDlg" Sequence="1" >NOT Installed OR PATCH</Show>
</InstallUISequence>

来源：https://stackoverflow.com/questions/14394374/how-can-i-insert-custom-dialog-before-welcomedlg