I have one picklist
and I have one vf button

if we choose the value in the picklist only that time button should be apper on the screen plz help me

​plz use only apex and visualforce

Thanks

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Here Child is Student
Parent is College

I have one custom field in Student fee
And in Parent Total Amount

Whenever student joined to college Total Amount will be update using trigger

<aura:component >
    <aura:attribute name="item" type="Camping_Item__c" required="true"/>
    <p><ui:outputText value="{!v.item.Name}"/></p>
    <p><ui:outputCurrency value="{!v.item.Price__c}"/></p>
    <p><ui:outputNumber value="{!v.item.Quantity__c}"/></p>
    <p><ui:outputCheckbox value="{!v.item.Packed__c}"/></p>

I have one picklist
and I have one vf button

if we choose the value in the picklist only that time button should be apper on the screen plz help me

​plz use only apex and visualforce

Thanks

<aura:component >
    <aura:attribute name="item" type="Camping_Item__c" required="true"/>
    <p><ui:outputText value="{!v.item.Name}"/></p>
    <p><ui:outputCurrency value="{!v.item.Price__c}"/></p>
    <p><ui:outputNumber value="{!v.item.Quantity__c}"/></p>
    <p><ui:outputCheckbox value="{!v.item.Packed__c}"/></p>

Hi, I am having trouble with the "Attributes and Expressions" module from trailhead.

Here is the challenge:
Create a Lightning Component to display a single item for your packing list.

• Create a component called campingListItem that displays the name (ui:outputText) and the three custom fields using the appropriate output components.
• Add an attribute named 'item' for type Camping_Item__c.

I created an component named campingListItem and this is the code:

<aura:component >
    <aura:attribute name="item" type="<my_domain>__Camping_Item__c"/>
    
    <ui:outputText value="{!v.item.Name}"/>
    <ui:outputCheckbox value="{!v.item.<my_domain>__Packed__c}"/>
    <ui:outputCurrency  value="{!v.item.<my_domain>__Price__c}"/>
    <ui:outputNumber value="{!v.item.<my_domain>__Quantity__c}"/>
</aura:component>

The error that I am getting is: "Challenge Not yet complete... here's what's wrong: 
The packingListItem Lightning Component's attribute tag doesn't exist or its attributes are not set correctly."

With this, I tried to create another component, with the name "packingListItem", but It didn't work.

Can anyone help me?

Thanks,