JSON 到数据表

Question

我正在尝试将 JSON 文本序列化为 DataTable，如下所示。

List<Dictionary<string, string>> list = 
JsonConvert.DeserializeObject<List<Dictionary<string, string>>>(jsonText);
DataTable dTable;
dTable = (from p in list select p).CopyToDataTable();

我收到以下错误。我该如何修复它？

错误：

Cannot deserialize JSON object into type 
'System.Collections.Generic.List`1[System.Collections.Generic.Dictionary`2
[System.String,System.String]]'.

Answer 1

这对我有用：

using Newtonsoft.Json;

string json = "[{"clientID":"1788","projectID":"19"},{"clientID":"1789","projectID":"24"},{"clientID":"1790","projectID":"24"},{"clientID":"1790","projectID":"23"},{"clientID":"1790","projectID":"21"}]";

DataTable tester = (DataTable) JsonConvert.DeserializeObject(json, (typeof(DataTable)));

Answer 2

public object Deserialize(string jsonText, Type valueType)
{
    try
    {
        Newtonsoft.Json.JsonSerializer json = new Newtonsoft.Json.JsonSerializer();

        json.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
        json.ObjectCreationHandling = Newtonsoft.Json.ObjectCreationHandling.Replace;
        json.MissingMemberHandling = Newtonsoft.Json.MissingMemberHandling.Ignore;
        json.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;

        StringReader sr = new StringReader(jsonText);

        Newtonsoft.Json.JsonTextReader reader = new JsonTextReader(sr);
        object result = json.Deserialize(reader, valueType);
        reader.Close();
        return result;
    }
    catch (Exception ex)
    {
        throw ex;
    }


}

Answer 3

试试这个

public static DataTable JsonToDataTable(string Json)
        {
            DataTable dt = new DataTable();
            try
            {
                dt = (DataTable)JsonConvert.DeserializeObject(Json, (typeof(DataTable)));
            }
            catch (Exception ex)
            {
                string chk = ex.Message;
                dt = new DataTable();
            }
            return dt;
        }