C# JSon Parser Error

Question

This is reading Json file code part.

           using (StreamReader streamReader = new StreamReader(tplFile, Encoding.GetEncoding("GB2312")))
            {
                try
                {
                    new JsonSerializer();
                    JsonTextReader reader = new JsonTextReader(streamReader);
                    JObject jObject = JObject.Load(reader);
                    JToken jToken = jObject["general"];
                    foreach (JToken current in (IEnumerable<JToken>)jToken)
                    {
                        PrintItem item = default(PrintItem);
                        string text = current.ToString();
                        if (text.Contains("arryname"))
                        {
                            string text2 = current["arryname"].ToString();
                            item.arryName = text2;
                            JToken jToken2 = current["value"];
                            using (IEnumerator<JToken> enumerator2 = ((IEnumerable<JToken>)jToken2).GetEnumerator())
                            {
                                while (enumerator2.MoveNext())
                                {
                                    JToken current2 = enumerator2.Current;
                                    PrintItem item2 = default(PrintItem);
                                    string text3 = current2.ToString();
                                    if (text3.Contains("size"))
                                    {
                                        item2.size = Common.Convert2Int(current2["size"].ToString());
                                    }
                                    if (text3.Contains("format"))
                                    {
                                        item2.format = current2["format"].ToString();
                                    }
                                    if (text3.Contains("value"))
                                    {
                                        item2.value = current2["value"].ToString();
                                    }
                                    if (text3.Contains("align"))
                                    {
                                        item2.align = Common.Convert2Int(current2["align"].ToString());
                                    }
                                    if (text3.Contains("style"))
                                    {
                                        item2.style = Common.Convert2Int(current2["style"].ToString());
                                    }
                                    if (text3.Contains("left"))
                                    {
                                        item2.left = Common.Convert2Int(current2["left"].ToString());
                                    }
                                    if (text2 == "items")
                                    {
                                        this.gtempItemList.arryname.Add(item2);
                                    }
                                    else
                                    {
                                        if (text2 == "pays")
                                        {
                                            this.gtempItemList.pays.Add(item2);
                                        }
                                    }
                                }
                                goto IL_376;
                            }
                            goto IL_27E;
                        }
                        goto IL_27E;
                    IL_376:
                        this.gtempItemList.ItemList.Add(item);
                        continue;
                    IL_27E:
                        if (text.Contains("size"))
                        {
                            item.size = Common.Convert2Int(current["size"].ToString());
                        }
                        if (text.Contains("format"))
                        {
                            item.format = current["format"].ToString();
                        }
                        if (text.Contains("value"))
                        {
                            item.value = current["value"].ToString();
                        }
                        if (text.Contains("align"))
                        {
                            item.align = Common.Convert2Int(current["align"].ToString());
                        }
                        if (text.Contains("style"))
                        {
                            item.style = Common.Convert2Int(current["style"].ToString());
                        }
                        if (text.Contains("left"))
                        {
                            item.left = Common.Convert2Int(current["left"].ToString());
                            goto IL_376;
                        }
                        goto IL_376;
                    }
                }
            }
            this.Refresh();
        }

    }

This is my Code.

And

{
    "general": {
        "arryname": "name1",
        "value": {
            "size": "10",
            "format": "L100"
        }
    }
}

it is my JSon file.

When the code string text2 = current["arryname"].ToString(); is running, the error

Cannot access child value on Newtonsoft.Json.Linq.JProperty.

occurred.

And I can't find reason.

You do new JsonSerializer(); then don't use the return. This looks wrong. — dbc
– dbc, Commented Oct 24, 2015 at 20:00

David Smith · Accepted Answer · 2016-02-13 20:57:48Z

1

You should changed json file with array. Array key is [].

answered Feb 13, 2016 at 20:57

David Smith

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Comments

Anders Carstensen · Accepted Answer · 2015-10-24 19:57:12Z

1

Try casting it to JProperty instead of JToken, and then use its Name and Value properties:

foreach (JProperty current in jToken.OfType<JProperty>())
{
    PrintItem item = default(PrintItem);
    string text = current.Name;
    if (text.Contains("arryname"))
    {
        string text2 = current.Value.ToString();

answered Oct 24, 2015 at 19:57

Anders Carstensen

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Comments

Borysko Danko · Accepted Answer · 2015-10-26 15:05:52Z

0

I changed Json file as follows.

{
"general": [
    {"arryname": "items", "value": [ 
        {"size": "2", "format": "L100", "value": "value", "align": 0, "style": "0", "left":"1"},
        {"size": "3", "format": "L100", "value": "value", "align": 1, "style": "1", "left":"1"},
        {"size": "4", "format": "L100", "value": "value", "align": 2, "style": "2", "left":"1"},]
    },
    {"arryname": "pays", "value": [ 
        {"size": "2", "format": "L100", "value": "value", "align": 0, "style": "0", "left":"1"}]
    }]
}
}

current["arryname"] requires array. But in Json file, there was only value not array.

So I changed Json it take array.

answered Oct 26, 2015 at 15:05

Borysko Danko

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