list The available components appear in the main portion of the panel in Java

Drawing QR Code in Java list The available components appear in the main portion of the panel

The Create Component dialog box appears, as shown in Figure 5-4

4 Fill in the following fields in the Component section:

Display Name: Enter a descriptive name for your component Hint: Enter a brief description of what your component does This field automatically appears in the documentation for your component Extends: You can leave this field blank Use this field to base your component on an existing component Component Directory: Click the Browse button to specify where you want to save the component Select a directory by using the Web application root folder, usually C:\Inetpub\wwwroot, or a subfolder

Name: Enter a filename for your component in the Name field The name follows general naming rules only letters, numbers, and underscores Don t add the cfc file extension to the name

from the Section list Click the plus (+) button to add properties: Name: Enter a name for your property in the Name field The name follows general naming rules only letters, numbers, and underscores Display Name: Enter a descriptive name for your property Hint: Enter a brief description of what your property stores This field automatically appears in the documentation for your component Type: Select the type of data your property stores

shown in Figure 5-5: Name: Enter a descriptive name for your function Display Name: Enter the same name that you enter in the Name field This display name gives you the option to make a longer, more descriptive version of the name Hint: Enter a summary of what your function does This summary appears in the automatic documentation for your component Access: Select an access type from the drop-down list Selecting Remote makes your function available as a Web service Return Type: Select a return type from the drop-down list All the ColdFusion data types appear in the list You can leave the Roles text box blank and the Output check box deselected

shown in Figure 5-6:

Name, Display Name, Hint, and Type: You can enter these fields as you do in the Functions section (see Step 7) Required: If you need the argument when calling the function, click the Required check box Default Value: To supply a default value, enter it in the Default Value field The function uses this value if calling code doesn t supply a value when calling the function

Sometimes, you may have a chunk of code that you don t always want to execute For example, you want the code to display an error message only after an error To specify that you want a code block to execute based on a condition, you can use this syntax:

<@ if (condition1) @> codeblockif [<@ elseif (condition2) @> codeblockifelse] [<@ else @> codeblockelse] <@ endif @>

Replace the labels that start with code-

portion (the brackets [] represent optional parts)

Here s a closer look at this syntax:

Dreamweaver creates the component as a cfc file and saves it in the directory that you specify in Step 4 To ensure that Dreamweaver can use your custom component, upload the cfc file to your remote server To remove a component, delete the cfc file from your RDS server Dreamweaver only lists components it finds on the RDS testing server

Server behaviors are blocks of code that send a request to the server and then receive data in return Dreamweaver provides many server behaviors in the Server Behaviors panel (choose Windows Server Behaviors), but you can also add more You can use Adobe Exchange (wwwadobecom/cfusion/exchange) to add packages of server behaviors You can also create your own server behaviors by using the Server Behavior Builder If you re planning to create your own server behavior, first check the Exchange site to see if the server behavior that you want to create already exists