\n gives error when parsing json in flutter

Question

I have a json array like this:

[
{
"variable1":"example",
"variable2": "example1\nexample2\nexample3"
},
{
"variable1":"exampleLast\n",
"variable2": "example1\nexample2\nexample3"
}
]

I am trying to parse this json a List in Flutter.

List posts = json.decode(response.data);

When I tried using 'dart:convert' it gives error FormatException... Control character in string (at line...).

I found this issue on Github but I can not find solution.
https://github.com/dart-lang/convert/issues/10

Answer 1

You just need to replace single slash to double slash and everything goes fine.

String replaced = string.replaceAll(r'\', r'\\');

Answer 2

Just replace the single backslash(\n) with double backslash(\\n) in your code:

[{
    "variable1": "example",
    "variable2": "example1\\nexample2\\nexample3"
},
{
    "variable1": "exampleLast\\n",
    "variable2": "example1\\nexample2\\nexample3"
}]

You need to escape the \ in your string (turning it into a double-), otherwise it will become a newline in the JSON source, not the JSON data.