JSON_LISTINGS_FEED with error ["SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data" ] from the server

[sammuljiang1412]

Hello:
Could the admin check this out:
I use the JSON_LISTINGS_FEED example to submit feed.

decimal price = 100.99m;

        string jsonString = $@"

{{
""header"": {{
""sellerId"": ""{sellerId}"",
""version"": ""2.0"",
""issueLocale"": ""en_US""
}},
""messages"": [
{{
""messageId"": 1,
""sku"": ""{sku}"",
""operationType"": ""PATCH"",
""productType"": ""PRODUCT"",
""patches"": [
{{
""op"": ""replace"",
""path"": ""/attributes/purchasable_offer"",
""value"": [
{{
""currency"": ""USD"",
""our_price"": [
{{
""schedule"": [
{{
""value_with_tax"": {price}
}}
]
}}
]
}}
]
}}
]
}}
]
}}";

and send it out

       var feedType = "JSON_LISTINGS_FEED";
        var contentType = "application/json; charset=UTF-8";

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(createFeedDocumentResponse.Url.ToString());
byte[] bytes = null;
bytes = System.Text.Encoding.UTF8.GetBytes(jsonString);
request.ContentType = contentType;
request.ContentLength = bytes.Length;
request.Method = "PUT";
using (Stream requestStream = request.GetRequestStream())
{
requestStream.Write(bytes, 0, bytes.Length);
requestStream.Close();
HttpWebResponse webresponse = (HttpWebResponse)await request.GetResponseAsync();
if (webresponse.StatusCode == HttpStatusCode.OK)
{
Stream responseStream = webresponse.GetResponseStream();
string responseStr = await new StreamReader(responseStream).ReadToEndAsync();
// return responseStr;
}
}

But the result is SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data.
I am not sure which place i may be doing incrrectly.

[sammuljiang1412]

Hello can anyone figure it out.
really appreciate any help

[abuzuhri]

do you see this sample ?

Amazon-SP-API-CSharp/Source/FikaAmazonAPI.SampleCode/FeedsSample.cs

Line 183 in 7103867

public async Task SubmitFeedPRICING_JSONAsync(string SKU, decimal PRICE, decimal? minPrice = null, decimal? maxPrice = null)

[sammuljiang1412]

hi abuzuhri:
My environment is .net framework 4.8.
I am not able to use the code in .netstandard 2.0.
so i tried the code in the home page [JSON_LISTINGS_FEED Submit for change price].
i thought string jsonString in a json formatte would do right?

[sammuljiang1412]

so this part

Amazon-SP-API-CSharp/Source/FikaAmazonAPI.SampleCode/FeedsSample.cs

Line 264 in 7103867

public async Task SubmitJsonFeedPricing(string sku, decimal price)

will not work out?

[sammuljiang1412]

ok i know what's wrong
thanks anyway.