440
Chapter 2: ColdFusion Tags
cftry
Description
Used with one or more
cfcatch
tags. Together, they catch and process exceptions in ColdFusion
pages.
Exceptions
are events that disrupt the normal flow of instructions in a ColdFusion page,
such as failed database operations, missing include files, and developer-specified events.
Category
Exception handling tags
Syntax
<cftry>
Code that might throw an exception
One or more cfcatch blocks
</cftry>
See also
cfcatch
,
cferror
,
cfrethrow
,
cfthrow
,
onError
; Chapter 14, “Handling Errors” in
ColdFusion MX Developer’s Guide
History
ColdFusion MX: Changed
cfscript
to include
try
and
catch
statements that are equivalent to
the
cftry
and
cfcatch
tags.
Usage
Within a
cftry
block, put the code that might throw an exception, followed by one ore more
cfcatch
tags that catch and process exceptions. This tag requires an end tag.
Example
<!--- cftry example, using TagContext to display the tag stack. --->
<h3>cftry Example</h3>
<!--- Open a cftry block. --->
<cftry>
<!--- Note misspelled tablename "employees" as "employeeas". --->
<cfquery name = "TestQuery" dataSource = "cfdocexamples">
SELECT *
FROM EMPLOYEEAS
</cfquery>
<!--- <p>... other processing goes here --->
<!--- specify the type of error for which we search --->
<cfcatch type = "Database">
<!--- the message to display --->
<h3>You've Thrown a Database <b>Error</b></h3>
<cfoutput>
<!--- and the diagnostic message from the ColdFusion server --->
<p>#cfcatch.message#</p>
<p>Caught an exception, type = #CFCATCH.TYPE# </p>
<p>The contents of the tag stack are:</p>
<cfloop index = i from = 1
to = #ArrayLen(CFCATCH.TAGCONTEXT)#>
Содержание COLFUSION MX 7 - INSTALLING AND USING COLDFUSION MX
Страница 1: ...COLDFUSION MX7 CFML Reference...
Страница 20: ...20 Chapter 1 Reserved Words and Variables...
Страница 50: ...50 Chapter 2 ColdFusion Tags cfelse br Searching cfif cfloop cfif...
Страница 101: ...cfdefaultcase 101 cfdefaultcase cfswitch cfoutput Your grade is grade cfoutput...
Страница 115: ...cfdocumentsection 115 cfdocumentsection cfoutput cfdocument...
Страница 311: ...cfNTauthenticate 311 Please Try again H2 cfif cfoutput cfinclude template loginform cfm cfabort cfif cfif cflogin...
Страница 411: ...cftable 411 cftable body html...
Страница 515: ...Chr 515 maxlength 5 p input type Submit name input type RESET cfform...
Страница 605: ...GetEncoding 605 WriteOutput The encoding is theEncoding cfscript cfif...
Страница 629: ...GetProfileString 629 tr td input type Submit name Submit value Submit td td td tr table form...
Страница 655: ...IIf 655 cfoutput IIf Hour Now GTE 12 DE It is afternoon or evening DE It is morning cfoutput b...
Страница 664: ...664 Chapter 3 ColdFusion Functions cfelse h3 Conversion error h3 cfif...
Страница 687: ...IsStruct 687 cfoutput cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Страница 693: ...IsWDDX 693 struct data wddxPacket hr xmp cfoutput packet xmp IsWDDX returns IsWDDX packet br cfoutput...
Страница 751: ...LSDateFormat 751 hr noshade cfoutput cfloop...
Страница 861: ...StructFind 861 cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Страница 869: ...StructIsEmpty 869 cfoutput cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Страница 903: ...Val 903 value Is the beginning numeric name form...
Страница 932: ...932 Chapter 3 ColdFusion Functions...
Страница 944: ...944 Chapter 4 ColdFusion MX Flash Form Style Reference...
Страница 962: ...962 Chapter 5 Application CFC Reference...
Страница 1008: ...1008 Chapter 6 ColdFusion MX Event Gateway Reference cfset retValue Reason reason cfreturn retValue cffunction...
Страница 1054: ...1054 Chapter 6 ColdFusion MX Event Gateway Reference...