selectOneMenu

[James Clinton]

I need to get to the selected items ID value, as apposed to the actual value, because I use this reference to look up something in the DB, and its not clear from the API how to get to this.

Binding to the value is no problem, but this is not neccessary unique in the database.

Do I need to bind the component to a UI object to get to this, or is there a much simplier way I am overlooking?

Thanks.

[Ali Gohar]

is this something related to JSF?

Not understood your question exactly

[James Clinton]

<h:selectOneMenu id="roles" value="#{userMaintainCommand.roleId}" required="true">                                        
  <f:selectItems value=".."/>
  <f:selectItems value=".."/>
</h:selectOneMenu>

On submit, the value of the selected item is binded to roleId. However, I want the id Value, not the displayed value of the item...so in HTML it would be:

<OPTION value="UUID123456">Displayed Value</OPTION>

roleId = UUID123456 (I want this)

as apposed to

roleId=Displayed Value (I dont want this)

regards
[ December 18, 2006: Message edited by: James Clinton ]

[Tushar Kherde]

Try folloing code

In Jsp
<f:selectItems value="#{myBean.listitem}"/>


In bean create getter method

getListitem() whose return Type shold be SelectItem[]

in method you can create SelectItem[] whose syntax is as follows

SelectItem[] listitem = new SelectItem[size];

listitem[i] = new SelectItem(storedColumnValue,displayColumnValue);


Hope this will help you

[Ali Gohar]

James,

<h:selectOneMenu id="roles" value="#{userMaintainCommand.roleId}" required="true">
<f:selectItems value=".."/>
<f:selectItems value=".."/>
</h:selectOneMenu>

This code will bind the userMaintainCommand.roleId to the value not to the item that is displayed in the select list.

You should return Arraylist<SelectItem> for using with <f:selectItems>.

[James Clinton]

How do you know which is the selected option when binding to the ArrayList?

Cheers.
[ December 19, 2006: Message edited by: James Clinton ]

[Bauke Scholtz]

The selected item is the one in the valuebinding of the h:selectOneMenu. You can use this for pre-selection.

[James Clinton]

You should return Arraylist<SelectItem> for using with <f:selectItems>.

Apoligies if this is a stupid question, but what exactly do you mean, how can this achieved?

[Bauke Scholtz]

JSF

<f:selectItems value="#{myBean.selectItems}" />

MyBean

public ArrayList<SelectItem> getSelectItems() { // Or just List<SelectItem>.
    // populate here
}

[James Clinton]

Thank you.

So back to my orginal problem of getting hold of the selected value, not label, how can this be achieved

Previously doing this binds the selected items label to selectItem which is a String in the backing bean.

---JSF
<h:selectOneMenu id="roles" value="#{myBean.selectItem}">
<f:selectItems value="#{myBean.selectItems}"/>
</h:selectOneMenu>

---MyBean.java
String selectItem;

regards

[James Clinton]

Finally discovered how to do this....

You need to bind the selectItems to a object of type http://www.docjar.com/docs/api/javax/faces/component/UISelectOne.html

binding="#{bean.uiSelectOneObj}"

<h:selectOneMenu id="roles" binding="#{bean.uiSelectOneObj}">                                        
 <f:selectItems value="#{list of SelectItem objects}" />
</h:selectOneMenu>

Then, you can call getValue() on it.

[Bauke Scholtz]

The getValue() returns exact the same as you definies in the valuebinding "{myBean.selectItem}". So I don't get the problem.

[James Clinton]

the 'value="#{bean.stringValue"' binding, binds local value, not the key value....or this is what i have discovered.

So

SelectItem.setLabel("displayed value");
SelectItem.setValue("key");

in HTML

<OPTION value="key-value">displayed-value</OPTION>

I have found the value binding always returns the local value, not the key value.

Please correct me if i have missed something..regards. J.
[ December 28, 2006: Message edited by: James Clinton ]