How to create a Dynamic drop down box by key?

[Former Member]

Hi All,

I have a drop down box populated with values.Now on the selection of any value in this drop down , the adjacent drop down box should get populated.

Can any one write some code snippet to make this easy for me.

Relevant answers will be appreciated and awarded.

Regards

DK

[sridhar_k2 · Accepted solution]

Hi DK,

It is very simple. For the first DropDown you just assign a action.This action will be called whenever you select any element in the DropDown.

In this method, just populate elements for the second drop down.

IWDAttributeInfo aInfo=wdContext.getNodeInfo().getAttribute("Currency");
if(aInfo!=null){
IModifiableSimpleValueSet valSet=aInfo.getModifiableSimpleType().getSVServices().getModifiableSimpleValueSet();
for(int i = 0;i<3;i++){
valSet.put("i"+1,"i"+1);
}

//Currency is your context element, which is binded to

2nd dropdown.

//ValSet, u can keep values, statically or dynamically.

Reply me, if you struck .

Regards,

SK

[saraswathi_d]

Hi,

Follow the below procedure

1. First you create two simple types in dictionary -->local dictionary->simple types. Go to enumeration tab enter the values (whatare the values you need to display in the first drop down)

Ex: first level

Doc_ documents

QBANK_ Question bank

2.Enter the values in second simple type enter the secondlevel dropdown values.

Ex: Secondlevel

Doc_P PlainDocs

Doc_R Reports

QBANK_F Functional

QBANK_T Technical

3. Create three context attributes

Ex: FirstLevel

SecondLevel

SecondLevel

All

4. If you want to display the second dropdown after selecting the first dropdown. Create one context attribute called visibility--> set property data type as visibility

5. Create two dropdown UI elements. Bound these dropdowns with wit the context atrributes.

6 Create one action and one method.

Go to implementation. Sample code id below.

public void wdDoInit()

{

//@@begin wdDoInit()

fillValueSet(true);

//@@end

}

public void fillValueSet( boolean initialize )

{

//@@begin fillValueSet()

IWDNodeInfo nodeInfo=wdContext.getNodeInfo();

IWDNodeElement element=wdContext.currentContextElement();

String choice1=element.getAttributeAsText("LevelOne");

IModifiableSimpleValueSet LevelTwoAll_SV=nodeInfo.getAttribute("LevelTwoAll").getModifiableSimpleType().getSVServices().getModifiableSimpleValueSet();

IModifiableSimpleValueSet LevelTwo_SV=nodeInfo.getAttribute("LevelTwo").getModifiableSimpleType().getSVServices().getModifiableSimpleValueSet();

LevelTwo_SV.clear();

String LevelTwo=element.getAttributeAsText("LevelTwo");

if(LevelTwo!=null)

{

if(!LevelTwo.startsWith(choice1))

{

element.setLevelTwo("");

}

}

for(int i=0;i<LevelTwoAll_SV.size();i++)

{

if(initialize || LevelTwoAll_SV.getKey(i).toString().startsWith(choice1))

{

LevelTwo_SV.put(LevelTwoAll_SV.getKey(i),LevelTwoAll_SV.getText(i));

}

}

//@@end

}

public void onActionFilterValues(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )

{

//@@begin onActionFilterValues(ServerEvent)

fillValueSet(false);

//@@end

}

Regards,

Saraswathi.

Hi,

Sorry by mistake i ahve written the procedure for design time dropdown

This is the sample code for Dynamic ui elements creation. Instead of Input field you can dropdown.

subInputField<i> =(IWDInputField) view.createElement(IWDInputField.class,"Subject" + i);

wdThis.wdGetContext().getContext().getRootNodeInfo().addAttribute("subjectloop"+i, "ddic:com.sap.dictionary.string");

wdThis.wdGetContext().getCurrentElement().setAttributeValue("subjectloop"+i, subject1<i>);

subInputField<i>.bindValue(wdThis.wdGetContext().getNodeInfo().getAttribute("subjectloop"+i));

group<i>.addChild(subInputField<i>);

Pls reward points for useful info

Message was edited by: Saraswathi D

[Former Member]

Hai Dipendra,

Create Valuenode X under this create a value attribute y in context.

Dnd two DorpdownbyIndex UI elements.

Bind first one with your data, and bind second one with X.

Create Action onSelectedFirst() to First dropdown .

write this code in above acion

onSelectedFirst{

ArrayList al=new ArrayList();

for(int i=0;i<8;i++){

IprivateYOURView.IXElement ele=wdContext.createXElement();

ele.setY(""+i);

al.add(ele);

}

wdContext.nodeX().bind(al);

}

Hope this will solve your problem.

regards,

Naga Raju