ColdFusion Developer's Guide

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Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Code Description Missing Include File Message: #cfcatch.Message# Detail: #cfcatch.Detail# File name: #cfcatch.MissingFilename# Database Error Message: #cfcatch.Message# Native error code: #cfcatch.NativeErrorCode# SQLState: #cfcatch.SQLState# Detail: #cfcatch.Detail# Other Error: #cfcatch.Type# Message: #cfcatch.message# Detail: #cfcatch.Detail# 388 Handling Errors Handles exceptions thrown when a page specified by the cfinclude tag cannot be found. Displays cfcatch variables, including the ColdFusion basic error message, detail message, and the name of the file that could not be found. Sets the errorCaught variable to indicate the error type. Handles exceptions thrown when accessing a database. Displays cfcatch variables, including the ColdFusion basic error message, the error code and SQL state reported by the databases system, and the detailed error message. Sets the errorCaught variable to indicate the error type. Handles any other exceptions generated in the cftry block. Since the error can occur after information has displayed (in this case, the contents of the include file), draws a line before writing the message text. Displays the ColdFusion basic and detailed error message. Sets the errorCaught variable to indicate the error type. Ends the HTML page, then the cftry block.
Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Using the cfthrow tag You can use the cfthrow tag to raise your own, custom exceptions. When you use the cfthrow tag, you specify any or all of the following information: Attribute Meaning type The type of error. It can be a custom type that has meaning only to your application, such as InvalidProductCode. You can also specify Application, the default type. You cannot use any of the predefined ColdFusion error types, such as Database or MissingTemplate. message A brief text message indicating the error. detail A more detailed text message describing the error. errorCode An error code that is meaningful to the application. This field is useful if the application uses numeric error codes. extendedInfo Any additional information of use to the application. All of these values are optional. You access the attribute values in cfcatch blocks and Exception type error pages by prefixing the attribute with either cfcatch or error, as in cfcatch.extendedInfo. The default ColdFusion error handler displays the message and detail values in the Message pane and the remaining values in the Error Diagnostic Information pane. Catching and displaying thrown errors The cfcatch tag catches a custom exception when you use any of the following values for the cfcatch type attribute: ■ The custom exception type specified in the cfthrow tag. ■ A custom exception type that hierarchically matches the initial portion of the type specified in the cfthrow tag. For more information, see the next section, “Custom error type name hierarchy”. ■ Application, which matches an exception that is thrown with the Application type attribute or with no type attribute. ■ Any, which matches any exception that is not caught by a more specific cfcatch tag. Similarly, if you specify any of these types in a cferror tag, the specified error page will display information about the thrown error. Because the cfthrow tag generates an exception, a Request error handler or the Site-wide error handler can also display these errors. Handling runtime exceptions with ColdFusion tags 389
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Beta ColdFusion Developer’s Guide
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Beta Contents Introduction . . . .
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Beta Chapter 8: Creating ColdFusion
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Beta About resource and sandbox sec
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Beta Refining your searches with zo
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Beta Authentication. . . . . . . .
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Beta Using WDDX. . . . . . . . . .
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Beta Sending outgoing messages . .
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Index A access client variables 412
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authentication application-based ex
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cfexit tag about 43 behavior of 296
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SetVariable 103 StructClear 134 Str
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caching 1144 curve chart considerat
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web services and 1306 when to use 2
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forms for updating 584 insert form
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adding custom header 1428 attachmen
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in user-defined functions 222 infor
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esponding to messages from ColdFusi
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Internet applications 19 ColdFusion
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functions for 502 generating multi-
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described 1539 example 1544 onIncom
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unions 609 user guide 609 using 599
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text 1470 retrieving, e-mail messag
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about 37, 74, 324, 400, 404, 417 bu
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web services, consuming 1319 web se
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V validating data types 83 form fie
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type conversions 1304 web services,
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