Question

I am retrieving some JSON data with the following function. It is called when an element is clicked and the data is used to create a table, populate the cells with images and append the table to a div.

function LoadImagesByCategory() {
    $.getJSON("/Service/GetJson.ashx?data=images", function(data) {
        jsObjectData = data.ImageCollection.Images;
        //Create a table named imageTable
        $("#imagesByCategory").append(imageTable);
        }
    })

the jsObjectData looks like this.

{"ImageCollection":
    {"Images":
    [{  "ImageID":"68",
        "CatID":"1",
        "Name":"uploadedFile",
        "Location":"/Images/Art/Full/68.gif",
        "ClipLocation":"/Images/Art/Clips/68.gif",
        "FullHeight":"504",
        "FullWidth":"451"
       },
       { "ImageID":"69",
         "CatID":"1",
         "Name":"uploadedFile",
         "Location":"/Images/Art/Full/69.gif",
         "ClipLocation":"/Images/Art/Clips/69.gif",
         "FullHeight":"364",
         "FullWidth":"500"
        },
        etc. etc 
     ]
   }
 }

It contains additional info about the images like the FullHeight and the FullWidth that I would like to be able to retrieve when an img is clicked.
For example if I made the id of the img something like “68ArtImage” where 68 is the ImageID I would like to be able to pass the 68 into a function attached to the jsObjectData and retrieve the corresponding Image Data.
The problems are first that I don’t know how to make the object avail. outside the function and second I don’t know how to attach the function to the object.

Answer 1

After reading your question again, perhaps this is what you want?

function getImageData(id, json){
    for(i in json.ImageCollection.Images){
       if( json.ImageCollection.Images[i].ImageID == 69){
            return json.ImageCollection.Images[i];
       }
    }
    return false;
}

getImageData will search the given json object and return the image object (like an associative array) if it exists, else false.

Example:

var json = {"ImageCollection":
    {"Images":
    [{  "ImageID":"68",
        "CatID":"1",
        "Name":"uploadedFile",
        "Location":"/Images/Art/Full/68.gif",
        "ClipLocation":"/Images/Art/Clips/68.gif",
        "FullHeight":"504",
        "FullWidth":"451"
       },
       { "ImageID":"69",
         "CatID":"1",
         "Name":"uploadedFile",
         "Location":"/Images/Art/Full/69.gif",
         "ClipLocation":"/Images/Art/Clips/69.gif",
         "FullHeight":"364",
         "FullWidth":"500"
        }
     ]
   }
 }

function getImageData(id, json){
    for(i in json.ImageCollection.Images){
       if( json.ImageCollection.Images[i].ImageID == 69){
            return json.ImageCollection.Images[i];
       }
    }
    return false;
}

if(image = getImageData(69, json)){
    alert('found the image wooo!');
    // now do something with your image object
}
else{
    alert('no image with that id found');
}