protected virtual void OnJsonFileChunkIsReady(JsonFileChunkIsReadyArgs e)
{
EventHandler <JsonFileChunkIsReadyArgs> handler = JsonFileChunkIsReady;
if (handler != null)
{
handler(this, e);
}
}
//static AutoResetEvent autoEvent = new AutoResetEvent(false);
/// <summary>
/// Read content from A large JSON file by chunks
/// </summary>
/// <param name="fileName">JSON file name</param>
public void readingChunksFromLargeJsonFile(string fileName)
{
//manualResetEvent = new ManualResetEvent(false);
//FastBulkGeocoding fbGeocoding = new FastBulkGeocoding("");
//fbGeocoding.GeocodingIsFinished += FbGeocoding_GeocodingIsFinished;
//manualResetEvent.WaitOne();
JsonSerializer serializer = new JsonSerializer();
AddressField o = null;
string sJsonAddressesChunk = "";
int curJsonObjects = 0;
using (FileStream s = File.Open(fileName, FileMode.Open))
using (StreamReader sr = new StreamReader(s))
using (JsonReader reader = new JsonTextReader(sr))
{
//reader.SupportMultipleContent = true;
bool blStartAdresses = false;
while (reader.Read())
{
if (reader.TokenType == JsonToken.StartArray)
{
blStartAdresses = true;
}
if (reader.TokenType == JsonToken.StartObject && blStartAdresses)
{
o = serializer.Deserialize <AddressField>(reader);
if (o.Address == null)
{
continue;
}
sJsonAddressesChunk += JsonConvert.SerializeObject(o, Formatting.None) + ",";
curJsonObjects++;
if (curJsonObjects >= jsonObjectsChunkSize)
{
sJsonAddressesChunk = "{\"rows\":[" + sJsonAddressesChunk.TrimEnd(',') + "]}";
JsonFileChunkIsReadyArgs chunkIsReady = new JsonFileChunkIsReadyArgs();
chunkIsReady.AddressesChunk = sJsonAddressesChunk;
sJsonAddressesChunk = "";
curJsonObjects = 0;
//manualResetEvent.Set();
OnJsonFileChunkIsReady(chunkIsReady);
Thread.Sleep(5000);
//manualResetEvent.WaitOne();
}
}
}
if (sJsonAddressesChunk != "")
{
sJsonAddressesChunk = "{\"rows\":[" + sJsonAddressesChunk.TrimEnd(',') + "]}";
JsonFileChunkIsReadyArgs chunkIsReady = new JsonFileChunkIsReadyArgs();
chunkIsReady.AddressesChunk = sJsonAddressesChunk;
sJsonAddressesChunk = "";
OnJsonFileChunkIsReady(chunkIsReady);
System.Threading.Thread.Sleep(5000);
}
JsonFileReadingIsDoneArgs args = new JsonFileReadingIsDoneArgs()
{
IsDone = true
};
OnJsonFileReadingIsDone(args);
}
}
