C# SqliteClient.SqliteCommand类代码示例

        /// <summary>
        /// Creates a new connection to the icontent.cache file.
        /// </summary>
        /// <param name="filename">The file to connect to.</param>
        public IGADatabaseConnector(String filename)
        {
            try {
                sqlite = new SqliteConnection("URI=file:" + filename + ",version=3");
                sqlite.Open();

                SqliteCommand query = new SqliteCommand("SELECT [appId] FROM [contentlist] LIMIT 1", sqlite);
                Object result = query.ExecuteScalar();
                sqlite.Close();
                if (result == null)
                {
                    this._appID = 0;
                }
                else
                {
                    this._appID = (int)result;
                }

                if (this._appID > 0) {
                    this._appSupported = Common.AppInfos.ContainsKey(this._appID);
                } else {
                    this._appSupported = false;
                }

                if (this._appSupported)
                {
                    _appInfo = Common.AppInfos[this._appID];
                }

            } catch (Exception) {
                throw new DatabaseConnectionFailureException();
            }
        }

        protected IDataReader ExecuteReader(SqliteCommand cmd)
        {
            SqliteConnection newConnection =
                    (SqliteConnection)((ICloneable)m_Connection).Clone();
            newConnection.Open();

            cmd.Connection = newConnection;
            return cmd.ExecuteReader();
        }

        //////////////////////////////////////////////////////////////
        //
        // All non queries are funneled through one connection
        // to increase performance a little
        //
        protected int ExecuteNonQuery(SqliteCommand cmd)
        {
            lock (m_Connection)
            {
                cmd.Connection = m_Connection;

                return cmd.ExecuteNonQuery();
            }
        }

 // Create SQL Command With Param
 public SqliteCommand CreateCommand(string sql, Hashtable sqlParams)
 {
     SqliteCommand sqlCmd = new SqliteCommand(sql, this);
     if (sqlParams != null) {
         foreach (string key in sqlParams.Keys)
             sqlCmd.Parameters.Add(key, sqlParams[key]);
     }
     return(sqlCmd);
 }

		public void WrongSyntax()
		{
			SqliteCommand insertCmd = new SqliteCommand("INSERT INTO t1 VALUES (,')",_conn);
			using(_conn)
			{
				_conn.Open();
				int res = insertCmd.ExecuteNonQuery();
				Assert.AreEqual(res,1);
			}
		}

		public void InsertRandomValuesWithParameter()
		{
			SqliteParameter textP = new SqliteParameter();
			textP.ParameterName = "textP";
			textP.SourceColumn = "t";
		
			SqliteParameter floatP = new SqliteParameter();
			floatP.ParameterName = "floatP";
			floatP.SourceColumn = "nu";
		
			SqliteParameter integerP = new SqliteParameter();
			integerP.ParameterName ="integerP";
			integerP.SourceColumn = "i";

			SqliteParameter blobP = new SqliteParameter();
			blobP.ParameterName = "blobP";
			blobP.SourceColumn = "b";

			Random random = new Random();
			StringBuilder builder = new StringBuilder();
			for (int k=0; k < random.Next(0,100); k++)
			{
				builder.Append((char)random.Next(65536));
			}
			
			SqliteCommand insertCmd = new SqliteCommand("DELETE FROM t1; INSERT INTO t1  (t, f, i, b ) VALUES(:textP,:floatP,:integerP,:blobP)",_conn);
			
			insertCmd.Parameters.Add(textP);
			insertCmd.Parameters.Add(floatP);
			insertCmd.Parameters.Add(blobP);
			insertCmd.Parameters.Add(integerP);
			
			textP.Value=builder.ToString();
			floatP.Value=Convert.ToInt64(random.Next(999));
			integerP.Value=random.Next(999);
			blobP.Value=System.Text.Encoding.UTF8.GetBytes("\u05D0\u05D1\u05D2" + builder.ToString());
			
			SqliteCommand selectCmd = new SqliteCommand("SELECT * from t1", _conn);

			using(_conn)
			{
				_conn.Open();
				int res = insertCmd.ExecuteNonQuery();
				Assert.AreEqual(res,1);
				
				using (IDataReader reader = selectCmd.ExecuteReader()) {
					Assert.AreEqual(reader.Read(), true);
					Assert.AreEqual(reader["t"], textP.Value);
					Assert.AreEqual(reader["f"], floatP.Value);
					Assert.AreEqual(reader["i"], integerP.Value);
					Assert.AreEqual(reader["b"], blobP.Value);
					Assert.AreEqual(reader.Read(), false);
				}
			}
		}

 public new void ExecuteNonQuery(string sql, string connectionString)
 {
     using (SqliteConnection conn = new SqliteConnection(connectionString))
     {
         SqliteCommand cmd = new SqliteCommand(sql, conn);
         cmd.CommandTimeout = 1200;
         conn.Open();
         cmd.ExecuteNonQuery();
         conn.Close();
     }
 }

 public new object ExecuteScalar(string sql, string connectionString)
 {
     using (SqliteConnection conn = new SqliteConnection(connectionString))
     {
         SqliteCommand cmd = new SqliteCommand(sql, conn);
         cmd.CommandTimeout = 1200;
         conn.Open();
         object retVal = cmd.ExecuteScalar();
         conn.Close();
         return retVal;
     }
 }

		internal SqliteDataReader (SqliteCommand cmd, IntPtr pVm, int version)
		{
			command = cmd;
			rows = new ArrayList ();
			columns = new ArrayList ();
			column_names = new Hashtable ();
			closed = false;
			current_row = -1;
			reading = true;
			ReadpVm (pVm, version);
			ReadingDone ();
		}

        public bool Convert()
        {
            try
            {
                SqliteConnection conn = new SqliteConnection(m_connectionString);
                conn.Open();

                Assembly assem = GetType().Assembly;
                Migration m = new Migration(conn, assem, "RegionStore");

                int version = m.Version;

                if (version <= 14)
                {
                    if (version == 0)
                    {
                        //read rex tables and add to rex database
                        m_log.Info("[regionstore] converting rex tables to rexobjectproperties");
                        if (!ConvertLegacyRexDataToModreX())
                        {
                            conn.Close();
                            return false;
                        }

                        m_log.Info("[RegionStore] Update region migrations");
                        //Add new field to Land table
                        SqliteCommand addAuthbyerIDCmd = new SqliteCommand(addAuthbyerID, conn);
                        addAuthbyerIDCmd.ExecuteNonQuery();

                        //Change migration to version 1
                        m.Version = 1;
                    }

                    //Run migrations up to 9
                    //Note: this run migrations only to point nine since only those files exist in application resources.
                    m.Update();

                    //Skip over 10. Change version to 10
                    //This skips adding of the ClickAction since that already exists in 0.4 database
                    //m.Version = 10;
                }

                conn.Close();
                return true;
            }
            catch (Exception e)
            {
                m_log.ErrorFormat("[RegionStore] Migration failed. Reason: {0}", e);
                return false;
            }
        }

        public AuthenticationData Get(UUID principalID)
        {
            AuthenticationData ret = new AuthenticationData();
            ret.Data = new Dictionary<string, object>();

            SqliteCommand cmd = new SqliteCommand("select * from `" + m_Realm + "` where UUID = :PrincipalID");
            cmd.Parameters.Add(new SqliteParameter(":PrincipalID", principalID.ToString()));

            IDataReader result = ExecuteReader(cmd, m_Connection);

            try
            {
                if (result.Read())
                {
                    ret.PrincipalID = principalID;

                    if (m_ColumnNames == null)
                    {
                        m_ColumnNames = new List<string>();

                        DataTable schemaTable = result.GetSchemaTable();
                        foreach (DataRow row in schemaTable.Rows)
                            m_ColumnNames.Add(row["ColumnName"].ToString());
                    }

                    foreach (string s in m_ColumnNames)
                    {
                        if (s == "UUID")
                            continue;

                        ret.Data[s] = result[s].ToString();
                    }

                    return ret;
                }
                else
                {
                    return null;
                }
            }
            catch
            {
            }
            finally
            {
                CloseCommand(cmd);
            }

            return null;
        }

        protected IDataReader ExecuteReader(SqliteCommand cmd, SqliteConnection connection)
        {
            lock (connection)
            {
                SqliteConnection newConnection =
                        (SqliteConnection)((ICloneable)connection).Clone();
                newConnection.Open();

                cmd.Connection = newConnection;
                //Console.WriteLine("XXX " + cmd.CommandText);

                return cmd.ExecuteReader();
            }
        }

		internal SqliteDataReader (SqliteCommand cmd, IntPtr pVm, int version)
		{
			command = cmd;
			rows = new ArrayList ();
			column_names_sens = new Hashtable ();
#if NET_2_0
			column_names_insens = new Hashtable (StringComparer.InvariantCultureIgnoreCase);
#else
			column_names_insens = new Hashtable (CaseInsensitiveHashCodeProvider.DefaultInvariant,
							     CaseInsensitiveComparer.DefaultInvariant);
#endif
			closed = false;
			current_row = -1;
			reading = true;
			ReadpVm (pVm, version, cmd);
			ReadingDone ();
		}

		static SqliteDataAdapter PrepareDataAdapter()
		{
			SqliteCommand select  = new SqliteCommand("SELECT t, f, i, b FROM t1",_conn);
			SqliteCommand update = new SqliteCommand("UPDATE t1 SET t = :textP, f = :floatP, i = :integerP, n=:blobP WHERE t = :textP ");
			update.Connection=_conn;
			SqliteCommand delete = new SqliteCommand("DELETE FROM t1 WHERE t = :textP");
			delete.Connection=_conn;
			SqliteCommand insert = new SqliteCommand("INSERT INTO t1  (t, f, i, b ) VALUES(:textP,:floatP,:integerP,:blobP)");
			insert.Connection=_conn;
			SqliteDataAdapter custDA = new SqliteDataAdapter(select);
		
			SqliteParameter textP = new SqliteParameter();
			textP.ParameterName = "textP";
			textP.SourceColumn = "t";
		
			SqliteParameter floatP = new SqliteParameter();
			floatP.ParameterName = "floatP";
			floatP.SourceColumn = "f";
		
			SqliteParameter integerP = new SqliteParameter();
			integerP.ParameterName ="integerP";
			integerP.SourceColumn = "i";

			SqliteParameter blobP = new SqliteParameter();
			blobP.ParameterName = "blobP";
			blobP.SourceColumn = "b";
		
			update.Parameters.Add(textP);
			update.Parameters.Add(floatP);
			update.Parameters.Add(integerP);
			update.Parameters.Add(blobP);
		
			delete.Parameters.Add(textP);
		
			insert.Parameters.Add(textP);
			insert.Parameters.Add(floatP);
			insert.Parameters.Add(integerP);
			insert.Parameters.Add(blobP);
		
			custDA.UpdateCommand = update;
			custDA.DeleteCommand = delete;
			custDA.InsertCommand = insert;
		
			return custDA;
		}

		public void Select()
		{
			SqliteCommand simpleSelect = new SqliteCommand("SELECT * FROM t1;  ", _conn); // check trailing spaces
			using(_conn)
			{
				_conn.Open();
				SqliteDataReader dr = simpleSelect.ExecuteReader();
				while(dr.Read())
				{
					string test = dr[0].ToString();
					Assert.AreEqual(dr["T"], stringvalue); // also checks case-insensitive column
					Assert.AreEqual(dr["F"], 123);
					Assert.AreEqual(dr["I"], 123);
					Assert.AreEqual(dr["B"], "123");
				}
				Assert.IsTrue(dr.FieldCount>0);
			}
		}