/// <summary>
/// Helper function for retrieving values from the connectionstring
/// </summary>
/// <param name="keyword">The keyword to retrieve settings for</param>
/// <param name="value">The resulting parameter value</param>
/// <returns>Returns true if the value was found and returned</returns>
public override bool TryGetValue(string keyword, out object value)
{
bool b = base.TryGetValue(keyword, out value);
if (!_properties.ContainsKey(keyword))
{
return(b);
}
var pd = _properties[keyword];
if (pd == null)
{
return(b);
}
// Attempt to coerce the value into something more solid
if (b)
{
if (pd.PropertyType == typeof(Boolean))
{
value = SqliteConvert.ToBoolean(value);
}
else
{
value = Convert.ChangeType(value, pd.PropertyType, CultureInfo.InvariantCulture);
}
}
else
{
DefaultValueAttribute att = (DefaultValueAttribute)pd.GetCustomAttributes(typeof(DefaultValueAttribute), true).FirstOrDefault();
if (att != null)
{
value = att.Value;
b = true;
}
}
return(b);
}
/// <summary>
/// Helper function for retrieving values from the connectionstring
/// </summary>
/// <param name="keyword">The keyword to retrieve settings for</param>
/// <param name="value">The resulting parameter value</param>
/// <returns>Returns true if the value was found and returned</returns>
public override bool TryGetValue(string keyword, out object value)
{
bool b = base.TryGetValue(keyword, out value);
if (!_properties.ContainsKey(keyword))
{
return(b);
}
PropertyDescriptor pd = _properties[keyword] as PropertyDescriptor;
if (pd == null)
{
return(b);
}
// Attempt to coerce the value into something more solid
if (b)
{
if (pd.PropertyType == typeof(Boolean))
{
value = SqliteConvert.ToBoolean(value);
}
else
{
value = TypeDescriptor.GetConverter(pd.PropertyType).ConvertFrom(value);
}
}
else
{
DefaultValueAttribute att = pd.Attributes[typeof(DefaultValueAttribute)] as DefaultValueAttribute;
if (att != null)
{
value = att.Value;
b = true;
}
}
return(b);
}
/// <summary>
/// Opens the connection using the parameters found in the <see cref="ConnectionString">ConnectionString</see>
/// </summary>
public override void Open()
{
if (_connectionState != ConnectionState.Closed)
{
throw new InvalidOperationException();
}
Close();
Dictionary <string, string> opts = ParseConnectionString(_connectionString);
if (Convert.ToInt32(FindKey(opts, "Version", "3"), CultureInfo.InvariantCulture) != 3)
{
throw new NotSupportedException("Only SQLite Version 3 is supported at this time");
}
string fileName = FindKey(opts, "Data Source", "");
if (String.IsNullOrEmpty(fileName))
{
fileName = FindKey(opts, "Uri", "");
if (String.IsNullOrEmpty(fileName))
{
throw new ArgumentException("Data Source cannot be empty. Use :memory: to open an in-memory database");
}
fileName = MapUriPath(fileName);
}
if (String.Compare(fileName, ":MEMORY:", StringComparison.OrdinalIgnoreCase) == 0)
{
fileName = ":memory:";
}
else
{
fileName = this.ExpandFileName(fileName);
}
try
{
bool usePooling = SqliteConvert.ToBoolean(FindKey(opts, "Pooling", Boolean.FalseString));
bool bUTF16 = SqliteConvert.ToBoolean(FindKey(opts, "UseUTF16Encoding", Boolean.FalseString));
int maxPoolSize = Convert.ToInt32(FindKey(opts, "Max Pool Size", "100"));
_defaultTimeout = Convert.ToInt32(FindKey(opts, "Default Timeout", "30"), CultureInfo.CurrentCulture);
_defaultIsolation =
(IsolationLevel)
Enum.Parse(typeof(IsolationLevel), FindKey(opts, "Default IsolationLevel", "Serializable"), true);
if (_defaultIsolation != IsolationLevel.Serializable &&
_defaultIsolation != IsolationLevel.ReadCommitted)
{
throw new NotSupportedException("Invalid Default IsolationLevel specified");
}
var dateFormat =
(SQLiteDateFormats)
Enum.Parse(typeof(SQLiteDateFormats), FindKey(opts, "DateTimeFormat", "ISO8601"), true);
//string temp = FindKey(opts, "DateTimeFormat", "ISO8601");
//if (String.Compare(temp, "ticks", true, CultureInfo.InvariantCulture) == 0) dateFormat = SQLiteDateFormats.Ticks;
//else if (String.Compare(temp, "julianday", true, CultureInfo.InvariantCulture) == 0) dateFormat = SQLiteDateFormats.JulianDay;
// SQLite automatically sets the encoding of the database to UTF16 if called from sqlite3_open16()
this._sql = bUTF16 ? new SQLite3_UTF16(dateFormat) : new SQLite3(dateFormat);
SQLiteOpenFlagsEnum flags = SQLiteOpenFlagsEnum.None;
if (SqliteConvert.ToBoolean(FindKey(opts, "Read Only", Boolean.FalseString)))
{
flags |= SQLiteOpenFlagsEnum.ReadOnly;
}
else
{
flags |= SQLiteOpenFlagsEnum.ReadWrite;
if (SqliteConvert.ToBoolean(FindKey(opts, "FailIfMissing", Boolean.FalseString)) == false)
{
flags |= SQLiteOpenFlagsEnum.Create;
}
}
if (SqliteConvert.ToBoolean(FindKey(opts, "FileProtectionComplete", Boolean.FalseString)))
{
flags |= SQLiteOpenFlagsEnum.FileProtectionComplete;
}
if (SqliteConvert.ToBoolean(FindKey(opts, "FileProtectionCompleteUnlessOpen", Boolean.FalseString)))
{
flags |= SQLiteOpenFlagsEnum.FileProtectionCompleteUnlessOpen;
}
if (SqliteConvert.ToBoolean(FindKey(opts, "FileProtectionCompleteUntilFirstUserAuthentication", Boolean.FalseString)))
{
flags |= SQLiteOpenFlagsEnum.FileProtectionCompleteUntilFirstUserAuthentication;
}
if (SqliteConvert.ToBoolean(FindKey(opts, "FileProtectionNone", Boolean.FalseString)))
{
flags |= SQLiteOpenFlagsEnum.FileProtectionNone;
}
_sql.Open(fileName, flags, maxPoolSize, usePooling);
_binaryGuid = SqliteConvert.ToBoolean(FindKey(opts, "BinaryGUID", Boolean.TrueString));
string password = FindKey(opts, "Password", null);
if (String.IsNullOrEmpty(password) == false)
{
_sql.SetPassword(password);
}
else if (_password != null)
{
_sql.SetPassword(_password);
}
_password = null;
// TODO : _dataSource = Path.GetFileNameWithoutExtension(fileName);
_dataSource = fileName;
OnStateChange(ConnectionState.Open);
_version++;
using (SqliteCommand cmd = CreateCommand())
{
string defValue;
if (fileName != ":memory:")
{
defValue = FindKey(opts, "Page Size", "1024");
if (Convert.ToInt32(defValue, CultureInfo.InvariantCulture) != 1024)
{
cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA page_size={0}",
defValue);
cmd.ExecuteNonQuery();
}
}
defValue = FindKey(opts, "Max Page Count", "0");
if (Convert.ToInt32(defValue, CultureInfo.InvariantCulture) != 0)
{
cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA max_page_count={0}",
defValue);
cmd.ExecuteNonQuery();
}
defValue = FindKey(opts, "Legacy Format", Boolean.FalseString);
cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA legacy_file_format={0}",
SqliteConvert.ToBoolean(defValue) ? "ON" : "OFF");
cmd.ExecuteNonQuery();
defValue = FindKey(opts, "Synchronous", "Normal");
if (String.Compare(defValue, "Full", StringComparison.OrdinalIgnoreCase) != 0)
{
cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA synchronous={0}", defValue);
cmd.ExecuteNonQuery();
}
defValue = FindKey(opts, "Cache Size", "2000");
if (Convert.ToInt32(defValue, CultureInfo.InvariantCulture) != 2000)
{
cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA cache_size={0}", defValue);
cmd.ExecuteNonQuery();
}
defValue = FindKey(opts, "Journal Mode", "Delete");
if (String.Compare(defValue, "Default", StringComparison.OrdinalIgnoreCase) != 0)
{
cmd.CommandText = String.Format(CultureInfo.InvariantCulture, "PRAGMA journal_mode={0}",
defValue);
cmd.ExecuteNonQuery();
}
}
if (_commitHandler != null)
{
_sql.SetCommitHook(_commitCallback);
}
if (_updateHandler != null)
{
_sql.SetUpdateHook(_updateCallback);
}
if (_rollbackHandler != null)
{
_sql.SetRollbackHook(_rollbackCallback);
}
if (global::System.Transactions.Transaction.Current != null &&
SqliteConvert.ToBoolean(FindKey(opts, "Enlist", Boolean.TrueString)))
{
EnlistTransaction(global::System.Transactions.Transaction.Current);
}
}
catch (SqliteException)
{
Close();
throw;
}
}