Question

我目前正在尝试读取位于Project文件夹中DataModels文件夹中的Json文件（名为initial_data.json）。我遇到的问题是它不会读取文件。我已经尝试了以下代码将文件读取到json字符串（稍后我将用它来反序列化，所以我试图将它显示在resultTextBlock中）并且没有任何结果。这是我的Json文件格式

{
"brands": [
    {
        "id": "AUD",
        "name": "AUDI",
        "sort": "99",
        "active": true
    },
    {
        "id": "BEN",
        "name": "MERCEDES-BENZ",
        "sort": "6",
        "active": true
    },
    {
        "id": "BMW",
        "name": "BMW",
        "sort": "7",
        "active": true
    },
    {
        "id": "CHE",
        "name": "CHEVROLET",
        "sort": "8",
        "active": true
    }
   ],
 "models": [
    {
        "id": "100",
        "name": "CIVIC",
        "brandID": "HON",
        "size": null,
        "year": "-",
        "active": true
    },
    {
        "id": "101",
        "name": "CRV",
        "brandID": "HON",
        "size": null,
        "year": "-",
        "active": true
    },
    {
        "id": "102",
        "name": "CRVEXI",
        "brandID": "HON",
        "size": null,
        "year": "-",
        "active": true
    },
    {
        "id": "103",
        "name": "GDYSSEY",
        "brandID": "HON",
        "size": null,
        "year": "-",
        "active": true
    }
 ]

}

这是我的json Class

public class Brand
{
    [JsonProperty("id")]
    public string id { get; set; }
    [JsonProperty("name")]
    public string name { get; set; }
    [JsonProperty("sort")]
    public string sort { get; set; }
    [JsonProperty("active")]
    public bool active { get; set; }
    [JsonProperty("path")]
    public string path { get; set; }
}


public class Model
{
    [JsonProperty("id")]
    public string id { get; set; }
    [JsonProperty("name")]
    public string name { get; set; }
    [JsonProperty("brandID")]
    public string brandID { get; set; }
    [JsonProperty("size")]
    public object size { get; set; }
    [JsonProperty("year")]
    public string year { get; set; }
    [JsonProperty("active")]
    public bool active { get; set; }
}

以下是我编写阅读功能的方法

private async Task readJsonAsync()
    {
        // Notice that the write **IS** identical ... except for the serializer.

        string content = String.Empty;

        var myStream = await ApplicationData.Current.LocalFolder.OpenStreamForReadAsync(JSONFILENAME);
        using (StreamReader reader = new StreamReader(myStream))
        {
            content = await reader.ReadToEndAsync();
        }

        resultTextBlock.Text = content;
    }

任何帮助将不胜感激

Answer 1

认为您为文件名指定的路径可能存在一些问题。

请将您的文件放在资源文件夹中，并按照以下代码

        var fileStream = File.OpenRead("Assets/" + "sampleJson.txt");//You can specify your file name here.
        using (StreamReader reader = new StreamReader(fileStream))
        {
          var content = await reader.ReadToEndAsync();
        }

在WP8.1中读取/反序列化json文件C＃

1 个答案: