CAML Query to get specific item in folder based on dropdown value using Javascript client object model

Question

Hi,
I am using the Javascript Client object model.
I have a custom list and a custom document library.
Custom list contains 2 columns - dlName , dlValue
The document library contains 2 folders - "folder1" ,  "folder2" and contains some images.
The image name starts with the "dlValue" available in the custom list
I am using a visual webpart and using javascript client object model.
I am trying to achieve the below functionality:
1) Load a dropdown with the custom list.
2) set the image based on the value in dropdown.
I have achieved the first option, I have set the dropdown, but not sure how to query the folder and set the image.
Below is the code i have used so far:
//In Visual webpart
<select id="ddlTest" >
</select>
<br/>
<div id="PreviewLayer">
<img id="imgPlaceHolder" runat="server" alt="Image" title="imgPlaceHolder" src=" " />
</div>
// In Javascript file
function RenderHtmlOnSuccess() {
var ddlTest = this.document.getElementById("ddlTest");
ddlTest.options.length = 0;
var enumerator = this.customListItems.getEnumerator();
while (enumerator.moveNext()) {
var currentItem = enumerator.get_current();
var dropdownValue = currentItem.get_item("dlValue");
ddlTest.options[ddlTest.options.length] = new Option(currentItem.get_item("dlName"), dropdownValue);
setImage(dropdownValue); // Not sure how to query the folder and set the image based on value.
// Also if dropdown value is changed, corresponding image should be shown
How to query the folder and based on dropdown value, show the image? Also, how to handle the dropdown value change?
Thanks

Answer 1

Hi,
Here are two links for your reference:
Example of how to Get Files from a Folder using Ecmascript \ Javascript client object model in SharePoint 2010
http://sharepointmantra.wordpress.com/2013/10/19/example-of-how-to-get-files-from-a-folder-using-ecmascript-javascript-client-object-model-in-sharepoint-2010/
SP2010 JSOM Client Object Model: How to get all documents in libraries including all folders recursively
http://sharepoint.stackexchange.com/questions/70185/sp2010-jsom-client-object-model-how-to-get-all-documents-in-libraries-including
In SharePoint 2013, we can also use REST API to achieve it.
http://msdn.microsoft.com/en-us/magazine/dn198245.aspx
Thanks,
Dennis Guo
TechNet Community Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Dennis Guo
TechNet Community Support