Question

I have an List error Entity which I used to pass errorId and error message to the UI layer.

   public class ErrorEntity
    {
       public int ErrorId
       {
           get;
           set;
       }

       public string ErrorMessage
       {
           get;
           set;
       }
    }
}

I send the object to the Javascript I am serializing it to JSON.

The Json I am getting after serialization look like

[{"ErrorId":1,"ErrorMessage":"Test has not been prepared for tag EP105"},{"ErrorId":2,"ErrorMessage":"Test has not been prepared for tag EP105"}]

Now I need to parse this Json string to show the error message to the user. Please let me know how can I parse it. Do I need to write a for loop to traverse with in it.

EDIT In my master page I am trying to parse it.

function ShowErrorMsg(jsonObject) {  
  for (i = 0; i < jsonObject.Object.length; i++) { //Object is undefined here.
    alert(jsonObject.Object.ErrorMessage);
  }          
}

Answer 1

Prefer JSON.parse() if it’s available:

var jsonArray = JSON.parse(serializedString);
window.alert(jsonArray[0].ErrorMessage);

Fall back to eval() otherwise:

var jsonArray = eval(serializedString);
window.alert(jsonArray[0].ErrorMessage);