When we are working on ComboBox control in Flex we give a default value to it so that the user using the Control is Prompted with some message. The default value like “select a product” …. something like that for the user Interface to select a value from the list. So to set this we can use a existing property in the ComboBox control called “prompt”.Example is given below.
<mx:ComboBox x=”89″ y=”299″ width=”240″ prompt=”Select Product..” labelField=”@PRO” dataProvider=”{arrColl}” id=”cmbStatus” ></mx:ComboBox>
As you can see the property usage in the control and the dataProvider is the ArrayCollection [An Example].
Enjoy the new Property in ComboBox control. And Enjoy the code.
This image shows the property.
flex on blog - by kumar 
Hello,
Imagine your code with the change on the prompt:
It’s possible use the string “All” as a value if i don´t change anything in the combobox??
Thanks!!
José Carlos Fonseca
FAFE – PORTUGAL
But after selecting a product the prompt value ‘Select Product..’ disappears then what to do
After selecting a value , that value is highlighted on the Combobox, thats the feature of it., if you want to reset it, then assign -1 as the selectedIndex to the Combobox.
regards,
kumar.
[…] prompt in ComboBox control in Flex. […]
I really find this a interesting subject. Never looked at this subject in this way. If you are going to create some more articles about this subject, I will be back soon!
Gandhi, Nice to see your blog ra. Long time . I have a question ra, i had a Combo Box, with a prompt(select a value). i want to change this value dynamically, in the sense, suppose the combo box is getting filled, the prompt says loading,if the values are not filled then it says the (select a value). So any idea regarding this.
I am new to Flex .
Hi Santosh,
In script we can change the prompt value of the combobox, like comboboxID.prompt=”select a value”; dunamically.So you working on flex??.
regards,
kumar.
I tried the comboboxID.prompt=” “, But i am getting error in my action script. The combo value is defined in another file say wizard.mxml, how an i use that combo box, toc hange dynmically in another file tool.mxml. i tried like wizard.comboboxID.prompt, but no result.
I am working on .NET , as apart of my project now working on flex.
I assume you want to change the prompt value of a combobox in wizard.mxml from tool.mxml before loading that wizard.mxml component right, then this is my solution, use getter/setter methods for promt in wizard.mxml and assign that to the combobox prompt, so while in tools.mxml before loading/popping wizard.mxml change the prompt using the setter method,like below.
//in tools.mxml
var wizardinstance:Wizard=new Wizard();
wizardinstance.setComboBoxpromtp=”Select a value”;
//here pop that wizard or change view to wizard//
//in wizard.mxml in combobox component tag use
prompt={getComboBoxPrompt}
so now if you open the wizard.mxml(through the instance we created above) we can see the change.
drop me your mail id, i will send some code snippet.
regards,
kumar.
Thanks, for the sugegstion, i will try it, my email id is santu_589@yahoo.com