I am playing around with Sqlite and keep getting an error when trying to read back some test data. For example, I created a simple db with a single table and some columns and populated it with some test data as shown below.
sqlite> .schema
CREATE TABLE "shows"(id integer primary key asc autoincrement, showName TEXT, guest TEXT, dateAired date, dateWatched date);
sqlite> select * from shows;
6|test show|test guest 1|2012.05.01|2012.07.10
7|test show|test guest 2|2012.05.02|2012.07.10
8|test show|test guest 4|2012.05.04|2012.07.10
I am using the System.Data.Sqlite library available here , but it keeps giving me an error while trying to read the date column. I tried putting the dates in the dd-MM-yyyy format, but still get an error saying "String Not Recognized as a valid datetime." I have tried using DateTime.Parse or casting it to datetime or just ToString()'ing it to see what happens, but I keep getting the same error. I can read the text fields fine, but can't read the date fields.
My C# code snipped is given below
var sqliteConn = new SQLiteConnection("Data Source=data/shows.db;Version=3;New=False;Compress=True");
sqliteConn.Open();
SQLiteCommand cmd = new SQLiteCommand(sqliteConn);
cmd.CommandText = "select * from shows";
SQLiteDataReader reader = cmd.ExecuteReader( );
while (reader.Read( ))
{
var showName = reader["showName"];
// This is where it keeps giving me an error.
// I have tried various things such as DateTime.Parse
var airedDate = DateTime.ParseExact("yyyy.MM.dd", reader["dateAired"].ToString(), new CultureInfo("en-AU"));
}
reader.Close( );
Any help would be greatly appreciated.
Regards,
Date and Time Datatype. SQLite does not have a storage class set aside for storing dates and/or times. Instead, the built-in Date And Time Functions of SQLite are capable of storing dates and times as TEXT, REAL, or INTEGER values: TEXT as ISO8601 strings ("YYYY-MM-DD HH:MM:SS.SSS").
The SQLite function DATE('now') returns the current date as a text value. It uses the 'YYYY-MM-DD' format, where YYYY is a 4-digit year, MM is a 2-digit month, and DD is a 2-digit day of the month. This function takes one argument: the text 'now' indicates the current date and time.
The datetime() function returns the date and time as text in their same formats: YYYY-MM-DD HH:MM:SS. The julianday() function returns the Julian day - the fractional number of days since noon in Greenwich on November 24, 4714 B.C. (Proleptic Gregorian calendar).
Based on the discussion in this thread, I decided to construct my connection string with the "datetimeformat" parameter and the "String Not Recognized as a valid datetime" issue was resolved.
My example connection string:
source=<source to db file>;version=3;new=False;datetimeformat=CurrentCulture
This feature was released in version 1.0.87.0 on July 8, 2013 (see release notes)
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