示例#1
0
 internal static string PreparedStringValue(string s)
 {
     return("'" + SqliteHelper.SanitizeString(s) + "'");
 }
示例#2
0
 /// <summary>
 /// Convert a DateTime to a formatted string.
 /// </summary>
 /// <param name="ts">The timestamp.</param>
 /// <returns>A string formatted for use with the specified database.</returns>
 public static string DbTimestamp(DateTime ts)
 {
     return(SqliteHelper.DbTimestamp(ts));
 }
示例#3
0
        /// <summary>
        /// Execute an UPDATE query.
        /// </summary>
        /// <param name="tableName">The table in which you wish to UPDATE.</param>
        /// <param name="keyValuePairs">The key-value pairs for the data you wish to UPDATE.</param>
        /// <param name="filter">The expression containing the UPDATE filter (i.e. WHERE clause data).</param>
        public void Update(string tableName, Dictionary <string, object> keyValuePairs, Expression filter)
        {
            if (String.IsNullOrEmpty(tableName))
            {
                throw new ArgumentNullException(nameof(tableName));
            }
            if (keyValuePairs == null || keyValuePairs.Count < 1)
            {
                throw new ArgumentNullException(nameof(keyValuePairs));
            }

            #region Variables

            string keyValueClause = "";

            #endregion

            #region Build-Key-Value-Clause

            int added = 0;
            foreach (KeyValuePair <string, object> curr in keyValuePairs)
            {
                if (String.IsNullOrEmpty(curr.Key))
                {
                    continue;
                }

                if (added == 0)
                {
                    if (curr.Value != null)
                    {
                        if (curr.Value is DateTime || curr.Value is DateTime?)
                        {
                            keyValueClause += SqliteHelper.PreparedFieldname(curr.Key) + "='" + DbTimestamp((DateTime)curr.Value) + "'";
                        }
                        else if (curr.Value is int || curr.Value is long || curr.Value is decimal)
                        {
                            keyValueClause += SqliteHelper.PreparedFieldname(curr.Key) + "=" + curr.Value.ToString();
                        }
                        else
                        {
                            if (Helper.IsExtendedCharacters(curr.Value.ToString()))
                            {
                                keyValueClause += SqliteHelper.PreparedFieldname(curr.Key) + "=" + SqliteHelper.PreparedUnicodeValue(curr.Value.ToString());
                            }
                            else
                            {
                                keyValueClause += SqliteHelper.PreparedFieldname(curr.Key) + "=" + SqliteHelper.PreparedStringValue(curr.Value.ToString());
                            }
                        }
                    }
                    else
                    {
                        keyValueClause += SqliteHelper.PreparedFieldname(curr.Key) + "= null";
                    }
                }
                else
                {
                    if (curr.Value != null)
                    {
                        if (curr.Value is DateTime || curr.Value is DateTime?)
                        {
                            keyValueClause += "," + SqliteHelper.PreparedFieldname(curr.Key) + "='" + DbTimestamp((DateTime)curr.Value) + "'";
                        }
                        else if (curr.Value is int || curr.Value is long || curr.Value is decimal)
                        {
                            keyValueClause += "," + SqliteHelper.PreparedFieldname(curr.Key) + "=" + curr.Value.ToString();
                        }
                        else
                        {
                            if (Helper.IsExtendedCharacters(curr.Value.ToString()))
                            {
                                keyValueClause += "," + SqliteHelper.PreparedFieldname(curr.Key) + "=" + SqliteHelper.PreparedUnicodeValue(curr.Value.ToString());
                            }
                            else
                            {
                                keyValueClause += "," + SqliteHelper.PreparedFieldname(curr.Key) + "=" + SqliteHelper.PreparedStringValue(curr.Value.ToString());
                            }
                        }
                    }
                    else
                    {
                        keyValueClause += "," + SqliteHelper.PreparedFieldname(curr.Key) + "= null";
                    }
                }
                added++;
            }

            #endregion

            #region Build-UPDATE-Query-and-Submit

            Query(SqliteHelper.UpdateQuery(tableName, keyValueClause, filter));

            #endregion
        }
示例#4
0
        /// <summary>
        /// Execute an INSERT query.
        /// </summary>
        /// <param name="tableName">The table in which you wish to INSERT.</param>
        /// <param name="keyValuePairs">The key-value pairs for the row you wish to INSERT.</param>
        /// <returns>A DataTable containing the results.</returns>
        public DataTable Insert(string tableName, Dictionary <string, object> keyValuePairs)
        {
            if (String.IsNullOrEmpty(tableName))
            {
                throw new ArgumentNullException(nameof(tableName));
            }
            if (keyValuePairs == null || keyValuePairs.Count < 1)
            {
                throw new ArgumentNullException(nameof(keyValuePairs));
            }

            #region Variables

            string    keys           = "";
            string    values         = "";
            int       insertedId     = 0;
            string    retrievalQuery = "";
            DataTable result;

            #endregion

            #region Build-Key-Value-Pairs

            int added = 0;
            foreach (KeyValuePair <string, object> curr in keyValuePairs)
            {
                if (String.IsNullOrEmpty(curr.Key))
                {
                    continue;
                }

                if (added == 0)
                {
                    #region First

                    keys += SqliteHelper.PreparedFieldname(curr.Key);
                    if (curr.Value != null)
                    {
                        if (curr.Value is DateTime || curr.Value is DateTime?)
                        {
                            values += "'" + DbTimestamp((DateTime)curr.Value) + "'";
                        }
                        else if (curr.Value is int || curr.Value is long || curr.Value is decimal)
                        {
                            values += curr.Value.ToString();
                        }
                        else
                        {
                            if (Helper.IsExtendedCharacters(curr.Value.ToString()))
                            {
                                values += SqliteHelper.PreparedUnicodeValue(curr.Value.ToString());
                            }
                            else
                            {
                                values += SqliteHelper.PreparedStringValue(curr.Value.ToString());
                            }
                        }
                    }
                    else
                    {
                        values += "null";
                    }

                    #endregion
                }
                else
                {
                    #region Subsequent

                    keys += "," + SqliteHelper.PreparedFieldname(curr.Key);
                    if (curr.Value != null)
                    {
                        if (curr.Value is DateTime || curr.Value is DateTime?)
                        {
                            values += ",'" + DbTimestamp((DateTime)curr.Value) + "'";
                        }
                        else if (curr.Value is int || curr.Value is long || curr.Value is decimal)
                        {
                            values += "," + curr.Value.ToString();
                        }
                        else
                        {
                            if (Helper.IsExtendedCharacters(curr.Value.ToString()))
                            {
                                values += "," + SqliteHelper.PreparedUnicodeValue(curr.Value.ToString());
                            }
                            else
                            {
                                values += "," + SqliteHelper.PreparedStringValue(curr.Value.ToString());
                            }
                        }
                    }
                    else
                    {
                        values += ",null";
                    }

                    #endregion
                }

                added++;
            }

            #endregion

            #region Build-INSERT-Query-and-Submit

            result = Query(SqliteHelper.InsertQuery(tableName, keys, values));

            #endregion

            #region Post-Retrieval

            if (!Helper.DataTableIsNullOrEmpty(result))
            {
                bool idFound = false;

                string primaryKeyColumn = GetPrimaryKeyColumn(tableName);

                foreach (DataRow curr in result.Rows)
                {
                    if (Int32.TryParse(curr["id"].ToString(), out insertedId))
                    {
                        idFound = true;
                        break;
                    }
                }

                if (!idFound)
                {
                    result = null;
                }
                else
                {
                    retrievalQuery = "SELECT * FROM `" + tableName + "` WHERE " + primaryKeyColumn + "=" + insertedId;
                    result         = Query(retrievalQuery);
                }
            }

            #endregion

            return(result);
        }
示例#5
0
        /// <summary>
        /// Show the columns and column metadata from a specific table.
        /// </summary>
        /// <param name="tableName">The table to view.</param>
        /// <returns>A list of column objects.</returns>
        public List <Column> DescribeTable(string tableName)
        {
            if (String.IsNullOrEmpty(tableName))
            {
                throw new ArgumentNullException(nameof(tableName));
            }

            List <Column> columns = new List <Column>();

            DataTable result = Query(SqliteHelper.LoadTableColumnsQuery(tableName));

            if (result != null && result.Rows.Count > 0)
            {
                foreach (DataRow currColumn in result.Rows)
                {
                    #region Process-Each-Column

                    /*
                     * public bool PrimaryKey;
                     * public string Name;
                     * public string DataType;
                     * public int? MaxLength;
                     * public bool Nullable;
                     */

                    Column tempColumn = new Column();

                    tempColumn.Name = currColumn["COLUMN_NAME"].ToString();

                    tempColumn.MaxLength = null;
                    if (currColumn.Table.Columns.Contains("CHARACTER_MAXIMUM_LENGTH"))
                    {
                        int maxLength = 0;
                        if (Int32.TryParse(currColumn["CHARACTER_MAXIMUM_LENGTH"].ToString(), out maxLength))
                        {
                            tempColumn.MaxLength = maxLength;
                        }
                    }

                    tempColumn.Type = Helper.DataTypeFromString(currColumn["DATA_TYPE"].ToString());

                    if (currColumn.Table.Columns.Contains("IS_NULLABLE"))
                    {
                        if (String.Compare(currColumn["IS_NULLABLE"].ToString(), "YES") == 0)
                        {
                            tempColumn.Nullable = true;
                        }
                        else
                        {
                            tempColumn.Nullable = false;
                        }
                    }
                    else if (currColumn.Table.Columns.Contains("IS_NOT_NULLABLE"))
                    {
                        tempColumn.Nullable = !(Convert.ToBoolean(currColumn["IS_NOT_NULLABLE"]));
                    }

                    if (currColumn["IS_PRIMARY_KEY"] != null &&
                        currColumn["IS_PRIMARY_KEY"] != DBNull.Value &&
                        !String.IsNullOrEmpty(currColumn["IS_PRIMARY_KEY"].ToString()))
                    {
                        tempColumn.PrimaryKey = Convert.ToBoolean(currColumn["IS_PRIMARY_KEY"]);
                    }

                    if (!columns.Exists(c => c.Name.Equals(tempColumn.Name)))
                    {
                        columns.Add(tempColumn);
                    }

                    #endregion
                }
            }

            return(columns);
        }
示例#6
0
        /// <summary>
        /// Execute an INSERT query with multiple values within a transaction.
        /// </summary>
        /// <param name="tableName">The table in which you wish to INSERT.</param>
        /// <param name="keyValuePairList">List of dictionaries containing key-value pairs for the rows you wish to INSERT.</param>
        public void InsertMultiple(string tableName, List <Dictionary <string, object> > keyValuePairList)
        {
            if (String.IsNullOrEmpty(tableName))
            {
                throw new ArgumentNullException(nameof(tableName));
            }
            if (keyValuePairList == null || keyValuePairList.Count < 1)
            {
                throw new ArgumentNullException(nameof(keyValuePairList));
            }

            #region Validate-Inputs

            Dictionary <string, object> reference = keyValuePairList[0];

            if (keyValuePairList.Count > 1)
            {
                foreach (Dictionary <string, object> dict in keyValuePairList)
                {
                    if (!(reference.Count == dict.Count) || !(reference.Keys.SequenceEqual(dict.Keys)))
                    {
                        throw new ArgumentException("All supplied dictionaries must contain exactly the same keys.");
                    }
                }
            }

            #endregion

            #region Build-Keys

            string keys      = "";
            int    keysAdded = 0;
            foreach (KeyValuePair <string, object> curr in reference)
            {
                if (keysAdded > 0)
                {
                    keys += ",";
                }
                keys += SqliteHelper.PreparedFieldName(curr.Key);
                keysAdded++;
            }

            #endregion

            #region Build-Values

            List <string> values = new List <string>();

            foreach (Dictionary <string, object> currDict in keyValuePairList)
            {
                string vals      = "";
                int    valsAdded = 0;

                foreach (KeyValuePair <string, object> currKvp in currDict)
                {
                    if (valsAdded > 0)
                    {
                        vals += ",";
                    }

                    if (currKvp.Value != null)
                    {
                        if (currKvp.Value is DateTime || currKvp.Value is DateTime?)
                        {
                            vals += "'" + DbTimestamp((DateTime)currKvp.Value) + "'";
                        }
                        else if (currKvp.Value is int || currKvp.Value is long || currKvp.Value is decimal)
                        {
                            vals += currKvp.Value.ToString();
                        }
                        else
                        {
                            if (Helper.IsExtendedCharacters(currKvp.Value.ToString()))
                            {
                                vals += SqliteHelper.PreparedUnicodeValue(currKvp.Value.ToString());
                            }
                            else
                            {
                                vals += SqliteHelper.PreparedStringValue(currKvp.Value.ToString());
                            }
                        }
                    }
                    else
                    {
                        vals += "null";
                    }

                    valsAdded++;
                }

                values.Add(vals);
            }

            #endregion

            #region Build-INSERT-Query-and-Submit

            Query(SqliteHelper.InsertMultipleQuery(tableName, keys, values));

            #endregion
        }