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PONewtonsoft JSON- Conversion to/from DataSet causes Decimal to become Double?
 

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  1. PONewtonsoft JSON- Conversion to/from DataSet causes Decimal to become Double?
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    <p>I'm using Newtonsoft JSON to serialize a DataSet to binary JSON using the code below. When de-serializing back to a DataSet, the field type changes from a Decimal to a Double? Does anybody know what's going wrong?</p> <p>Sample code:</p> <pre><code>static void Main(string[] args) { var ds = new DataSet(); var dt = ds.Tables.Add(); dt.Columns.Add("Test", typeof(Decimal)); dt.Rows.Add(new object[] { 1.23345M }); var data = DataSetToBinJSON(ds); var ds2 = BinJSONToDataSet(data); Console.WriteLine((ds2.Tables[0].Columns[0].DataType == typeof(Decimal)) ? "Passed" : string.Format("Failed- {0}", ds2.Tables[0].Columns[0].DataType)); Console.ReadLine(); } /// &lt;summary&gt; /// Utility function to create an optimized Binary JSON version of a DataSet /// &lt;/summary&gt; public static byte[] DataSetToBinJSON(DataSet dataSet) { if (dataSet == null || dataSet.Tables == null || dataSet.Tables.Count == 0) { return null; } using (var ms = new MemoryStream()) { using (var writer = new BsonWriter(ms)) { var serializer = new JsonSerializer(); serializer.Serialize(writer, dataSet); return ms.ToArray(); } } } /// &lt;summary&gt; /// Utility function to deserialize an optimized Binary JSON serialized DataSet /// &lt;/summary&gt; public static DataSet BinJSONToDataSet(byte[] dataBytes) { if (dataBytes.Length == 0) { return null; } using (var ms = new MemoryStream(dataBytes)) { using (var reader = new BsonReader(ms)) { var serializer = new JsonSerializer(); return serializer.Deserialize&lt;DataSet&gt;(reader); } } } </code></pre>
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    1. USKeith Blows
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    1. COIt's not a bug, it's normal behavior. Json format does not distinguish between float/double/decimal types, but you can implement own JsonTextReader. Solution: http://stackoverflow.com/a/9916087/835720
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    2. CO@oakio- many thanks. Figured this out by simply checking the source! Was expecting Newtonsoft serialization to behave like: http://chrish.com.au/blog/json-netdeserializing-a-datatable/.
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