• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 338
  • Last Modified:

How do I invoke a function using a button in coldfusion?

I have the following function which I need to invoke using a "download" button. The download button is located just below a cfgrid. The function will output an Excel file when supplied with data.

1. How do I invoke the function when a user clicks the download button?
2. How do I supply the full dataset and not just what is available in the current page of the cfgrid?
<cffunction name="generateExcel" output="Yes" access="remote">
		<cfargument name="theQuery" type="query">
		<cfargument name="columnList" type="string" default="">
		<cfargument name="mode" type="string" default="display">
		<cfargument name="theFilename" type="string" default="clients_admin.xls">
 
		<cfset var TAB = chr(9)>
		<cfset var i = 1>
		<cfset var headerArray = ArrayNew(1)>
 
      <cfquery name="getClientsAdmin" datasource="#THIS.dsn#">
	  		SELECT *
			FROM    Clients
        </cfquery>
 
 
        <cfquery name="getClients" datasource="#THIS.dsn#">
			SELECT *
			FROM Clients WHERE owner = <cfqueryparam value="#SESSION.MM_Username#" cfsqltype="cf_sql_clob" maxlength="10"> 
        </cfquery>
		
		
		<cfsetting enablecfoutputonly="Yes">
		
		<!--- Dump all content before this fn call --->
		<cfcontent reset="yes">
		
		<!--- Use the full column list, if none is provided --->
		<cfif Len( ARGUMENTS.columnList ) IS 0>
			<cfset ARGUMENTS.columnList = ARGUMENTS.theQuery.columnList>
		</cfif>
		
		<cfswitch expression="#ARGUMENTS.mode#">
			<cfcase value="display">
				<cfif NOT isdefined("REQUEST.headerDoneFlag")>
					<cfset REQUEST.headerDoneFlag = true>
					<CFHEADER NAME="Content-Disposition" VALUE="inline; filename=""#ARGUMENTS.theFilename#""">
					<CFCONTENT TYPE="application/msexcel">
				</cfif>
			</cfcase>
			<cfcase value="save">
				<cfset guid = CreateUUID()>
				<cfset filename = GetDirectoryFromPath(GetCurrentTemplatePath()) & "temp_" & guid & ".xls">
				<cfset REQUEST.headerDoneFlag = true>
				<cfheader name="Content-type" value="application/octet-stream"> 
				<cfheader name="Content-Disposition" value="attachment;filename=""#ARGUMENTS.theFilename#""">
				<cfsavecontent variable="output">
					<cfset generateExcel( ARGUMENTS.theQuery, ARGUMENTS.columnList, "save" )>
				</cfsavecontent><cfoutput>#output#</cfoutput><cfabort>
				<cffile action="WRITE" file="#filename#" output="#output#">
				<cfcontent type="application/msexcel" file="#filename#" deleteFile="Yes">
			</cfcase>
			<cfcase value="debug">
				<cfoutput><pre></cfoutput>
			</cfcase>
			<cfdefaultcase>
				<cfthrow message="Mode must be either 'display', 'save', or 'debug'.">
			</cfdefaultcase>
		</cfswitch>
		
		<!--- Write the header row --->
		<cfloop index="i" from="1" to="#ListLen( columnList )#">
			<cfset item = Trim( ListGetAt( columnList, i ) )>
			<cfset headerArray[ ArrayLen( headerArray )+1 ] = item>
			<cfoutput>#item##TAB#</cfoutput>
		</cfloop>
		<cfoutput>#chr(13)#</cfoutput>
		
		<!--- Write all the sub rows --->
		<cfloop query="ARGUMENTS.theQuery">
		
			<cfloop index="i" from="1" to="#ArrayLen( headerArray )#">
				<cfset dbVal = Trim( ARGUMENTS.theQuery[headerArray[i]][CurrentRow] )>
				<cfif IsDate( dbVal )>
					<cfset dbVal = DateFormat( dbVal, "mm/dd/yyyy" )>
				<cfelse>
					<cfset dbVal = replaceList(dbVal,"#TAB#,#chr(10)#,#chr(13)#"," , , ")>
				</cfif>
				<cfoutput>#dbVal##TAB#</cfoutput>
			</cfloop>
			
			<cfoutput>#chr(13)#</cfoutput>
		
		</cfloop>
		
		<cfif ARGUMENTS.mode EQ "debug">
			<cfoutput></pre></cfoutput>
		</cfif>
		
		<cfsetting enablecfoutputonly="No">
	</cffunction>

Open in new window

0
futr_vision
Asked:
futr_vision
  • 4
  • 2
1 Solution
 
srikanthmadishettiCommented:
use cfjaxproxy onclick event.
0
 
futr_visionAuthor Commented:
Thanks. But my problem is that i am extremely new to ColdFusion and cfjaxproxy is greek to me.  I'll need a little more detail on how to accomplish this.
0
 
srikanthmadishettiCommented:
0
[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

 
futr_visionAuthor Commented:
Hmmm. Doesn't look like what I am trying to do. All I really need is the code and the place to put it to hook this function up.
0
 
futr_visionAuthor Commented:
Looking at this a little further i don't think cfajaxproxy will work for me. My download link/button is outside of the grid and needs to return the entire recordset. To me this simple means creating a way of calling the function and passing query data to it for it to do its thing. I just don't know how to do it.
0
 
futr_visionAuthor Commented:
Here is where I am at. I have some code that invokes the function and a cfc with the function. The invoke is pasted below and the function is in my original message except it is surrounded by the cfcomponent tag.
<cfquery name="customerDownload" datasource="THIS.dsn">
	Select *
	From Customers
</cfquery>
 
<cfinvoke component="CFC.ExcelDownload" method="generateExcel">
	<cfinvokeargument name="theQuery" value="#customerDownload#">
</cfinvoke>

Open in new window

0

Featured Post

The 14th Annual Expert Award Winners

The results are in! Meet the top members of our 2017 Expert Awards. Congratulations to all who qualified!

  • 4
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now