The execution of a method of DC with parameters: variable bindings or pageFlowScope?

I use a data control method to send the email that has parameters.  Based on the behavior I see when I drag and drop methods of data control to a page and I have JDeveloper automatically generate a form of parameter, I did the following which uses to store the settings.

My data control method sendEmail method that has two input parameters 'recipient' and 'sender '.

<af:commandImageLink id="cil1" icon="/images/email.png" actionListener="#{bindings.sendEmail.execute}">
    <af:setActionListener from="#{row.recipient}" to="#{bindings.sendEmail_recipient.inputValue}"/> 
    <af:setActionListener from="#{row.sender}" to="#{bindings.sendEmail_sender.inputValue}"/>
</af:commandImageLink>

Can I manually set the sendEmail_recipient and sendEmail_sender variables in the definition of page like this file...

<variableIterator id="variables">
    <variable Type="java.lang.String" Name="sendEmail_recipient" IsQueriable="false"/>
    <variable Type="java.lang.String" Name="sendEmail_sender" IsQueriable="false"/>
</variableIterator>

. . .

<attributeValues IterBinding="variables" id="sendEmail_recipient">
    <AttrNames>
        <Item Value="sendEmail_recipient"/>
    </AttrNames>
</attributeValues>
<attributeValues IterBinding="variables" id="sendEmail_sender">
    <AttrNames>
        <Item Value="sendEmail_sender"/>
    </AttrNames>
</attributeValues>

.. then I put my method parameters in the definition of page like this file...

<methodAction id="sendEmail" RequiresUpdateModel="true"

                  Action="invokeMethod" MethodName="sendEmail"

                  IsViewObjectMethod="false" DataControl="CustomDC"

                  InstanceName="CustomDC.dataProvider">

      <NamedData NDName="recipient"

                 NDValue="#{bindings.sendEmail_recipient}"

                 NDType="java.lang.String"/>

      <NamedData NDName="sender"

                 NDValue="#{bindings.sendEmail_sender}"

                 NDType="java.lang.String"/>

</methodAction>

Notice that I use the GUI to define the parameters of the method, but the changes to the XML here is the same.

A colleague asked why it saying that it is just as easy to put my data in pageFlowScope like that...

<af:commandImageLink id="cil1" icon="/images/email.png" actionListener="#{bindings.sendEmail.execute}">

    <af:setActionListener from="#{row.recipient}" to="#{pageFlowScope.sendEmail_recipient}"/>

    <af:setActionListener from="#{row.sender}" to="#{pageFlowScope.sendEmail_sender}"/>

</af:commandImageLink>

.. then change the method like this...

<methodAction id="sendEmail" RequiresUpdateModel="true"

                  Action="invokeMethod" MethodName="sendEmail"

                  IsViewObjectMethod="false" DataControl="CustomDC"

                  InstanceName="CustomDC.dataProvider">

      <NamedData NDName="recipient"

                 NDValue="#{pageFlowScope.sendEmail_recipient}"

                 NDType="java.lang.String"/>

      <NamedData NDName="sender"

                 NDValue="#{pageFlowScope.sendEmail_sender}"

                 NDType="java.lang.String"/>

</methodAction>

In this way does not require that I define "variables" in the definition of page file.

My question is why or why not this method of using pageFlowScope appropriate or better than using "links" to store my parameter values and the link between my commandImageLink and the method of backend?

User, tell us your version of Jdev, please!

The iterator variable lives only with the page. Scope of page file lives in the course of the entire task. If a difference is the scope of variables. It is not necessary to their scope of flow layout. You can use views instead. The two approaches can be used, but I would like to put these partners in the iterator as variable they so clearly show its use here. You go green like any other attribute of the link layer that gives you more consistent programming experience.

A question, if you move the method into the page create a form of parameter, parameter variables must be created automatically by the framework of he. From your description, I understand that this was not the case?

Timo

Tags: Java

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    Is someone can you please help me what this error 7?

    as a result, that it is bound to the HTTP POST vi method...

    How can it be fix?

    Its quite urgent...

    Thanks in advance.

    Solution is provided by the NOR... Vi POST method missing two files that need to be there in the startup of the CRIO.insted folder there is in the system folder. That's why when running the exe that the startup on crio application it gives error as the files are not there. The fix for this HTTP POST vi update isn't out yet EITHER.

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    Hello world!

    I have programmed a function that returns a boolean value based on the result of the SQL. It's the function:

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    Frame you your variable in quotes, which makes the string literal ' |. ' seq_name | "rather than the content of the variable.

    I think that something like this would be an improvement.

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    Start

    Select 1

    in exist_check

    of all_sequences

    where upper (sequence_name) = upper (seq_name);

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    end;

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    Kind regards

    Mike

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