uploadfile.cfm

<!--- Upload file. --->
<cfset UploadPath="x:\abc\uploads">
<cfset ThumbnailHeight="200">
<cfset ThumbnailWidth="200">

<!---Logofile is the name of form fields--->
<cffile action="upload" filefield="#Logofile#" destination="#UploadPath#" nameconflict="MakeUnique">
<cfset LogoFile = #File.ServerFile#>

<cfset SourcePic = UploadPath & "/" & LogoFile>
    <cfimage action="info" structname="imagetemp" source="#SourcePic#">
    <cfset x=max(imagetemp.width,imagetemp.height)>
    <cfset newheight=imagetemp.height*ThumbnailHeight/x>
    <cfset newwidth=imagetemp.width*ThumbnailWidth/x>
    <cfimage action="resize" source="#UploadPath#/#LogoFile#" width="#newwidth#" height="#newheight#" destination="#UploadPath#/t_#LogoFile#" overwrite="true">



<!---This is another way to create image thumbnail without losing dimension ratio.--->

<cffile action="upload" filefield="#Logofile#" destination="#UploadPath#" nameconflict="MakeUnique">
 <cfset LogoFile = #File.ServerFile#>
 <cfset SourcePic = UploadPath & "/" & LogoFile>
 <cfimage source="#SourcePic#" name="SourceImage">
 <cfset info=ImageInfo(SourceImage)>

<cfif Info.Width GE Info.Height>
  <cfimage source="#SourcePic#" action="resize" width="219" height="" destination="#UploadPath#/t_#LogoFile#" overwrite="No">
<cfelse>
  <cfimage source="#SourcePic#" action="resize" width="" height="234" destination="#UploadPath#/t_#LogoFile#" overwrite="No">
</cfif>