Hello,
> my connection string looks like this:
> *var connection = new SQLiteConnection("DateTimeKind=Utc;Data
> Source=:memory:");*
> Here is a blog post about it (settig datetimekind in utc for sqlite) on
> which I based:
>
https://www.thomaslevesque.com/2015/06/28/how-to-retrieve-dates-as-utc-in-sqlite/
Still, I cannot reproduce te original problem. The following results are OK:
======
test.cs:
======
using System;
using System.Data.SQLite;
class Test
{
static void TestUtc(bool utc, bool ticks)
{
DateTime dtUtcNow = DateTime.UtcNow;
DateTime dt;
SQLiteConnection connection;
SQLiteCommand cmd;
SQLiteDataReader rdr;
int rows;
string connectionstring = "Data Source=:memory:;";
Console.WriteLine("* Testing " + (utc ? "UTC" : "UNSPECIFIED")
+ "/" + (ticks ? "TICKS" : "ISO8601") + "...");
Console.WriteLine(" DateTime: {0}", dtUtcNow);
Console.WriteLine(" DateTime.Kind: {0}", dtUtcNow.Kind);
if ( utc ) {
connectionstring += "DateTimeKind=Utc;";
}
if ( ticks ) {
connectionstring += "DateTimeFormat=Ticks;";
}
connection = new SQLiteConnection(connectionstring);
connection.Open();
cmd = new SQLiteCommand("CREATE TABLE IF NOT EXISTS [test]
([date] DATETIME NOT NULL);");
cmd.Connection = connection;
rows = cmd.ExecuteNonQuery();
cmd.Dispose();
cmd = new SQLiteCommand("INSERT INTO [test] ([date]) VALUES
(@date);");
cmd.Parameters.AddWithValue("@date", dtUtcNow);
cmd.Connection = connection;
rows = cmd.ExecuteNonQuery();
cmd.Dispose();
cmd = new SQLiteCommand("SELECT [date] FROM [test];");
cmd.Connection = connection;
rdr = cmd.ExecuteReader();
while ( rdr.Read() ) {
dt = rdr.GetDateTime(0);
Console.WriteLine(" DateTime: {0}", dt);
Console.WriteLine(" DateTime.Kind: {0}", dt.Kind);
}
rdr.Dispose();
cmd.Dispose();
connection.Dispose();
}
static void Main()
{
TestUtc(false, false);
TestUtc(true, false);
TestUtc(false, true);
TestUtc(true, true);
}
}
======
gives the following results:
======
* Testing UNSPECIFIED/ISO8601...
DateTime: 2017-12-16 15:48:39
DateTime.Kind: Utc
DateTime: 2017-12-16 16:48:39
DateTime.Kind: Unspecified
* Testing UTC/ISO8601...
DateTime: 2017-12-16 15:48:40
DateTime.Kind: Utc
DateTime: 2017-12-16 15:48:40
DateTime.Kind: Utc
* Testing UNSPECIFIED/TICKS...
DateTime: 2017-12-16 15:48:40
DateTime.Kind: Utc
DateTime: 2017-12-16 15:48:40
DateTime.Kind: Unspecified
* Testing UTC/TICKS...
DateTime: 2017-12-16 15:48:40
DateTime.Kind: Utc
DateTime: 2017-12-16 15:48:40
DateTime.Kind: Utc
======
It looks that your app behaves as if it had default settings:
ISO8601/Unspecified, which results in Local/Unspecified. The sole thing
I have in mind is Connection Designer. Try to omit the Connection
Designer -- as far as I remember it had problems with some parameters:
CD doubled them or had named them incorrectly.
-- best regards
Cezary H. Noweta
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