Looks like you are referencing a form field in your query; form.invid.  You are not submitting a form, you are calling a cfc so you probably want to add an argument to your function and pass the value when you call it.  Change like so:

<!---CFC PAGE--->

<cfcomponent>

<cffunction name="getinvoice" access="public" returntype="query">

<cfargument name="invid" type="numeric" required="true" />

<cfquery name="recent_invoice" datasource="w9">

SELECT invoice.*, project.*, bid.*, CONCAT(w9.w9fname,' ', w9.w9lname,'  ', w9.w9businessname) AS Contractor, w9.*

FROM invoice, project, bid, w9

WHERE invid = <cfqueryparam cfsqltype="cf_sql_integer" value="#arguments.invid#" />

AND INVOICE.invcontractor = W9.w9ID

AND INVOICE.invproject = PROJECT.proID

AND INVOICE.invproject = BID.bidproject

AND INVOICE.invcontractor = BID.bidcontractor

</cfquery>

<cfreturn recent_invoice>

</cffunction>

</cfcomponent>

<!---Display page that show the invoked query--->

<cfinvoke

  component="invoice.componets.test"

  method="getinvoice"

  invid="#yourInvoiceNumber#"

  returnvariable="recent_invoice">

<!--- CFC Query --->

</cfinvoke>

Probably.  I meant that as a placeholder for you.  Just replace #yourInvoiceNumber# with the invoice number that you want to query for (like 8 or whatever).  The other variables I gave you, like arguments.invid, do not need to be changed.

If the invoice number truly is coming from a form field prior to the cfc call then you could change #yourInvoiceNumber# to #form.invid# (or whatever).

Does that make sense?

Sorry I didn't reply sooner. Was off-line all weekend.

Without seeing more of your code I can't pinpoint exactly what the issue is.  One possibilty is that you have not included a condition around your cfinvoke tag so that it only attempts to call your cfc AFTER the form has been submitted.  Something like this:

<cfif IsDefined("form.invid")>

     <!---INVOKE PAGE--->

     <cfinvoke

       component="invoice.componets.test"

       method="getinvoice"

       invid="#form.invid#"

       returnvariable="recent_invoice">

     <!--- CFC Query --->

     </cfinvoke>

<cfelse>

     <!---FORM PAGE--->

     <form action="2_Try_Test_cfc.cfm" method="get" enctype="application/x-www-form-urlencoded" name="form" id="form">

     <input name="invid" id="invid" type="text" /><input name="submit" type="submit" />

     </form>

</cfif>

That is if the form page is submitting to itself.

If your form page is submitting to a different page (2_Try_Test_cfc.cfm ?) then your cfc call should be in that page with the reference to your #form.invid# variable.

Remember, you can always use <cfdump var="#form#" /> on pages to see what is available (or not).