标签：SQLite transaction C# parm cmd Connection values new Data

SQLite介绍

SQLite是一个开源、免费的小型RDBMS(关系型数据库)，能独立运行、无服务器、零配置、支持事物，用C实现，内存占用较小，支持绝大数的SQL92标准。

SQLite数据库官方主页：http://www.sqlite.org/index.html

cmd下sqlite的使用网

1：选择下载对应自己系统的sqlite.3exe文件

2：解压后使用cmd命令进入sqlite3.exe文件所在的路径执行命令就可以操作做相应的操作。

在进入数据库之后如果需要退出的话windows下摁ctrl+c就能退出

例如：

创建数据库命令：sqlite3.exe 【数据库名字.后缀名】

　　这里比较牛一点的感觉就是创建的数据库后缀名是任意的、不过注意一点就是：在命令框下执行创建数据库的时候。

如果没有为数据库创建表格、则看不见数据库文件，所以必须创建表格。

　　例如：在CMD命令提示符下输入sqlite3.exe test.db(test.db是数据库名)回车，执行完后，命令提示符自动跳转

到"SQLITE>"状态。这时还是看不到这个数据库！等表格创建或关闭sqlite3

例如：create table user(’用户名‘); 这时可以看到sqlite3.exe所在文件夹下的这个数据库文件了

如果下次还要使用此数据库时仍然使用sqlite3.exe test.db即可进入此数据库

基础命令（增删改查）
创建表格命令：create table tablename(字段，字段）

这里从命令上可以清楚的看到、在sqlite数据库中创建表格字段的时候、允许不为字段申明数据类型。

这是区别于其它关系型数据库的。

执行插入命令：insert into tablename values(value,values)

在、前面我们可以看出、sqlite的操作上和sqlserver没什么太大区别、值得注意的是、insert时区别于sqlserver中、因为sqlserver中允许使用 "insert table name values(value,value)"这样的省略式擦入。但是sqlite中是不允许使用省略式插入语句的。

执行删除语句：delete from tablename where <条件>

删除数据语法和sqlserver相同、

删除表则命令为：drop table tablename

数据更新命令：update tablename set 字段=值 如果需要条件的话、添加上where语句。

执行查询语句：select *from tablename 可跟随where语句

以上就是基础的sqlite的增删查改语法和命令。

C#操作SQLite Database
C#下SQLite操作驱动dll下载：System.Data.SQLite

C#使用SQLite步骤：

（1）新建一个project

（2）添加SQLite dll引用（操作驱动）

（3）使用API操作SQLite DataBase

操作SQLite Database的C#帮助类SQLite Helper

using System;
using System.Data.SQLite;

namespace SQLiteSamples
{
    class Program
    {
        //数据库连接
        SQLiteConnection m_dbConnection;

        static void Main(string[] args)
        {
            Program p = new Program();
        }

        public Program()
        {
            createNewDatabase();
            connectToDatabase();
            createTable();
            fillTable();
            printHighscores();
        }

        //创建一个空的数据库
        void createNewDatabase()
        {
            SQLiteConnection.CreateFile("MyDatabase.sqlite");
        }

        //创建一个连接到指定数据库
        void connectToDatabase()
        {
            m_dbConnection = new SQLiteConnection("Data Source=MyDatabase.sqlite;Version=3;");
            m_dbConnection.Open();
        }

        //在指定数据库中创建一个table
        void createTable()
        {
            string sql = "create table highscores (name varchar(20), score int)";
            SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
            command.ExecuteNonQuery();
        }

        //插入一些数据
        void fillTable()
        {
            string sql = "insert into highscores (name, score) values ('Me', 3000)";
            SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
            command.ExecuteNonQuery();

            sql = "insert into highscores (name, score) values ('Myself', 6000)";
            command = new SQLiteCommand(sql, m_dbConnection);
            command.ExecuteNonQuery();

            sql = "insert into highscores (name, score) values ('And I', 9001)";
            command = new SQLiteCommand(sql, m_dbConnection);
            command.ExecuteNonQuery();
        }

        //使用sql查询语句，并显示结果
        void printHighscores()
        {
            string sql = "select * from highscores order by score desc";
            SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
            SQLiteDataReader reader = command.ExecuteReader();
            while (reader.Read())
                Console.WriteLine("Name: " + reader["name"] + "	Score: " + reader["score"]);
            Console.ReadLine();
        }
    }
}

SQLite Helper类
将一些常用的功能封装一下，封装成SQLite Helper类

using System;
using System.Data;
using System.Text.RegularExpressions;
using System.Xml;
using System.IO;
using System.Collections;
using System.Data.SQLite;

namespace DBUtility.SQLite
{
    /// <summary>
    /// SQLiteHelper is a utility class similar to "SQLHelper" in MS
    /// Data Access Application Block and follows similar pattern.
    /// </summary>
    public class SQLiteHelper
    {
        /// <summary>
        /// Creates a new <see cref="SQLiteHelper"/> instance. The ctor is marked private since all members are static.
        /// </summary>
        private SQLiteHelper()
        {
        }
        /// <summary>
        /// Creates the command.
        /// </summary>
        /// <param name="connection">Connection.</param>
        /// <param name="commandText">Command text.</param>
        /// <param name="commandParameters">Command parameters.</param>
        /// <returns>SQLite Command</returns>
        public static SQLiteCommand CreateCommand(SQLiteConnection connection, string commandText, params SQLiteParameter[] commandParameters)
        {
            SQLiteCommand cmd = new SQLiteCommand(commandText, connection);
            if (commandParameters.Length > 0)
            {
                foreach (SQLiteParameter parm in commandParameters)
                    cmd.Parameters.Add(parm);
            }
            return cmd;
        }

        /// <summary>
        /// Creates the command.
        /// </summary>
        /// <param name="connectionString">Connection string.</param>
        /// <param name="commandText">Command text.</param>
        /// <param name="commandParameters">Command parameters.</param>
        /// <returns>SQLite Command</returns>
        public static SQLiteCommand CreateCommand(string connectionString, string commandText, params SQLiteParameter[] commandParameters)
        {
            SQLiteConnection cn = new SQLiteConnection(connectionString);

            SQLiteCommand cmd = new SQLiteCommand(commandText, cn);

            if (commandParameters.Length > 0)
            {
                foreach (SQLiteParameter parm in commandParameters)
                    cmd.Parameters.Add(parm);
            }
            return cmd;
        }
        /// <summary>
        /// Creates the parameter.
        /// </summary>
        /// <param name="parameterName">Name of the parameter.</param>
        /// <param name="parameterType">Parameter type.</param>
        /// <param name="parameterValue">Parameter value.</param>
        /// <returns>SQLiteParameter</returns>
        public static SQLiteParameter CreateParameter(string parameterName, System.Data.DbType parameterType, object parameterValue)
        {
            SQLiteParameter parameter = new SQLiteParameter();
            parameter.DbType = parameterType;
            parameter.ParameterName = parameterName;
            parameter.Value = parameterValue;
            return parameter;
        }

        /// <summary>
        /// Shortcut method to execute dataset from SQL Statement and object[] arrray of parameter values
        /// </summary>
        /// <param name="connectionString">SQLite Connection string</param>
        /// <param name="commandText">SQL Statement with embedded "@param" style parameter names</param>
        /// <param name="paramList">object[] array of parameter values</param>
        /// <returns></returns>
        public static DataSet ExecuteDataSet(string connectionString, string commandText, object[] paramList)
        {
            SQLiteConnection cn = new SQLiteConnection(connectionString);
            SQLiteCommand cmd = cn.CreateCommand();


            cmd.CommandText = commandText;
            if (paramList != null)
            {
                AttachParameters(cmd,commandText, paramList);
            }
            DataSet ds = new DataSet();
            if (cn.State == ConnectionState.Closed)
                cn.Open();
            SQLiteDataAdapter da = new SQLiteDataAdapter(cmd);
            da.Fill(ds);
            da.Dispose();
            cmd.Dispose();
            cn.Close();
            return ds;
        }
        /// <summary>
        /// Shortcut method to execute dataset from SQL Statement and object[] arrray of  parameter values
        /// </summary>
        /// <param name="cn">Connection.</param>
        /// <param name="commandText">Command text.</param>
        /// <param name="paramList">Param list.</param>
        /// <returns></returns>
        public static DataSet ExecuteDataSet(SQLiteConnection cn, string commandText, object[] paramList)
        {

            SQLiteCommand cmd = cn.CreateCommand();


            cmd.CommandText = commandText;
            if (paramList != null)
            {
                AttachParameters(cmd,commandText, paramList);
            }
            DataSet ds = new DataSet();
            if (cn.State == ConnectionState.Closed)
                cn.Open();
            SQLiteDataAdapter da = new SQLiteDataAdapter(cmd);
            da.Fill(ds);
            da.Dispose();
            cmd.Dispose();
            cn.Close();
            return ds;
        }
        /// <summary>
        /// Executes the dataset from a populated Command object.
        /// </summary>
        /// <param name="cmd">Fully populated SQLiteCommand</param>
        /// <returns>DataSet</returns>
        public static DataSet ExecuteDataset(SQLiteCommand cmd)
        {
            if (cmd.Connection.State == ConnectionState.Closed)
                cmd.Connection.Open();
            DataSet ds = new DataSet();
            SQLiteDataAdapter da = new SQLiteDataAdapter(cmd);
            da.Fill(ds);
            da.Dispose();
            cmd.Connection.Close();
            cmd.Dispose();
            return ds;
        }

        /// <summary>
        /// Executes the dataset in a SQLite Transaction
        /// </summary>
        /// <param name="transaction">SQLiteTransaction. Transaction consists of Connection, Transaction,  /// and Command, all of which must be created prior to making this method call. </param>
        /// <param name="commandText">Command text.</param>
        /// <param name="commandParameters">Sqlite Command parameters.</param>
        /// <returns>DataSet</returns>
        /// <remarks>user must examine Transaction Object and handle transaction.connection .Close, etc.</remarks>
        public static DataSet ExecuteDataset(SQLiteTransaction transaction, string commandText, params SQLiteParameter[] commandParameters)
        {

            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rolled back or committed, please provide an open transaction.", "transaction");
            IDbCommand cmd = transaction.Connection.CreateCommand();
            cmd.CommandText = commandText;
            foreach (SQLiteParameter parm in commandParameters)
            {
                cmd.Parameters.Add(parm);
            }
            if (transaction.Connection.State == ConnectionState.Closed)
                transaction.Connection.Open();
            DataSet ds = ExecuteDataset((SQLiteCommand)cmd);
            return ds;
        }

        /// <summary>
        /// Executes the dataset with Transaction and object array of parameter values.
        /// </summary>
        /// <param name="transaction">SQLiteTransaction. Transaction consists of Connection, Transaction,    /// and Command, all of which must be created prior to making this method call. </param>
        /// <param name="commandText">Command text.</param>
        /// <param name="commandParameters">object[] array of parameter values.</param>
        /// <returns>DataSet</returns>
        /// <remarks>user must examine Transaction Object and handle transaction.connection .Close, etc.</remarks>
        public static DataSet ExecuteDataset(SQLiteTransaction transaction, string commandText, object[] commandParameters)
        {

            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rolled back or committed,                                                          please provide an open transaction.", "transaction");
            IDbCommand cmd = transaction.Connection.CreateCommand();
            cmd.CommandText = commandText;
            AttachParameters((SQLiteCommand)cmd,cmd.CommandText, commandParameters);
            if (transaction.Connection.State == ConnectionState.Closed)
                transaction.Connection.Open();

            DataSet ds = ExecuteDataset((SQLiteCommand)cmd);
            return ds;
        }

        #region UpdateDataset
        /// <summary>
        /// Executes the respective command for each inserted, updated, or deleted row in the DataSet.
        /// </summary>
        /// <remarks>
        /// e.g.:
        ///  UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
        /// </remarks>
        /// <param name="insertCommand">A valid SQL statement  to insert new records into the data source</param>
        /// <param name="deleteCommand">A valid SQL statement to delete records from the data source</param>
        /// <param name="updateCommand">A valid SQL statement used to update records in the data source</param>
        /// <param name="dataSet">The DataSet used to update the data source</param>
        /// <param name="tableName">The DataTable used to update the data source.</param>
        public static void UpdateDataset(SQLiteCommand insertCommand, SQLiteCommand deleteCommand, SQLiteCommand updateCommand, DataSet dataSet, string tableName)
        {
            if (insertCommand == null) throw new ArgumentNullException("insertCommand");
            if (deleteCommand == null) throw new ArgumentNullException("deleteCommand");
            if (updateCommand == null) throw new ArgumentNullException("updateCommand");
            if (tableName == null || tableName.Length == 0) throw new ArgumentNullException("tableName");

            // Create a SQLiteDataAdapter, and dispose of it after we are done
            using (SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter())
            {
                // Set the data adapter commands
                dataAdapter.UpdateCommand = updateCommand;
                dataAdapter.InsertCommand = insertCommand;
                dataAdapter.DeleteCommand = deleteCommand;

                // Update the dataset changes in the data source
                dataAdapter.Update(dataSet, tableName);

                // Commit all the changes made to the DataSet
                dataSet.AcceptChanges();
            }
        }
        #endregion




        /// <summary>
        /// ShortCut method to return IDataReader
        /// NOTE: You should explicitly close the Command.connection you passed in as
        /// well as call Dispose on the Command  after reader is closed.
        /// We do this because IDataReader has no underlying Connection Property.
        /// </summary>
        /// <param name="cmd">SQLiteCommand Object</param>
        /// <param name="commandText">SQL Statement with optional embedded "@param" style parameters</param>
        /// <param name="paramList">object[] array of parameter values</param>
        /// <returns>IDataReader</returns>
        public static IDataReader ExecuteReader(SQLiteCommand cmd, string commandText, object[] paramList)
        {
            if (cmd.Connection == null)
                throw new ArgumentException("Command must have live connection attached.", "cmd");
            cmd.CommandText = commandText;
            AttachParameters(cmd,commandText, paramList);
            if (cmd.Connection.State == ConnectionState.Closed)
                cmd.Connection.Open();
            IDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            return rdr;
        }

        /// <summary>
        /// Shortcut to ExecuteNonQuery with SqlStatement and object[] param values
        /// </summary>
        /// <param name="connectionString">SQLite Connection String</param>
        /// <param name="commandText">Sql Statement with embedded "@param" style parameters</param>
        /// <param name="paramList">object[] array of parameter values</param>
        /// <returns></returns>
        public static int ExecuteNonQuery(string connectionString, string commandText, params object[] paramList)
        {
            SQLiteConnection cn = new SQLiteConnection(connectionString);
            SQLiteCommand cmd = cn.CreateCommand();
            cmd.CommandText = commandText;
            AttachParameters(cmd,commandText, paramList);
            if (cn.State == ConnectionState.Closed)
                cn.Open();
            int result = cmd.ExecuteNonQuery();
            cmd.Dispose();
            cn.Close();

            return result;
        }



        public static int ExecuteNonQuery(SQLiteConnection cn, string commandText, params  object[] paramList)
        {

            SQLiteCommand cmd = cn.CreateCommand();
            cmd.CommandText = commandText;
            AttachParameters(cmd,commandText, paramList);
            if (cn.State == ConnectionState.Closed)
                cn.Open();
            int result = cmd.ExecuteNonQuery();
            cmd.Dispose();
            cn.Close();

            return result;
        }

        /// <summary>
        /// Executes  non-query sql Statment with Transaction
        /// </summary>
        /// <param name="transaction">SQLiteTransaction. Transaction consists of Connection, Transaction,   /// and Command, all of which must be created prior to making this method call. </param>
        /// <param name="commandText">Command text.</param>
        /// <param name="paramList">Param list.</param>
        /// <returns>Integer</returns>
        /// <remarks>user must examine Transaction Object and handle transaction.connection .Close, etc.</remarks>
        public static int ExecuteNonQuery(SQLiteTransaction transaction, string commandText, params  object[] paramList)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rolled back or committed,                                                        please provide an open transaction.", "transaction");
            IDbCommand cmd = transaction.Connection.CreateCommand();
            cmd.CommandText = commandText;
            AttachParameters((SQLiteCommand)cmd,cmd.CommandText, paramList);
            if (transaction.Connection.State == ConnectionState.Closed)
                transaction.Connection.Open();
            int result = cmd.ExecuteNonQuery();
            cmd.Dispose();
            return result;
        }


        /// <summary>
        /// Executes the non query.
        /// </summary>
        /// <param name="cmd">CMD.</param>
        /// <returns></returns>
        public static int ExecuteNonQuery(IDbCommand cmd)
        {
            if (cmd.Connection.State == ConnectionState.Closed)
                cmd.Connection.Open();
            int result = cmd.ExecuteNonQuery();
            cmd.Connection.Close();
            cmd.Dispose();
            return result;
        }

        /// <summary>
        /// Shortcut to ExecuteScalar with Sql Statement embedded params and object[] param values
        /// </summary>
        /// <param name="connectionString">SQLite Connection String</param>
        /// <param name="commandText">SQL statment with embedded "@param" style parameters</param>
        /// <param name="paramList">object[] array of param values</param>
        /// <returns></returns>
        public static object ExecuteScalar(string connectionString, string commandText, params  object[] paramList)
        {
            SQLiteConnection cn = new SQLiteConnection(connectionString);
            SQLiteCommand cmd = cn.CreateCommand();
            cmd.CommandText = commandText;
            AttachParameters(cmd,commandText, paramList);
            if (cn.State == ConnectionState.Closed)
                cn.Open();
            object result = cmd.ExecuteScalar();
            cmd.Dispose();
            cn.Close();

            return result;
        }

        /// <summary>
        /// Execute XmlReader with complete Command
        /// </summary>
        /// <param name="command">SQLite Command</param>
        /// <returns>XmlReader</returns>
        public static XmlReader ExecuteXmlReader(IDbCommand command)
        { // open the connection if necessary, but make sure we
            // know to close it when we�re done.
            if (command.Connection.State != ConnectionState.Open)
            {
                command.Connection.Open();
            }

            // get a data adapter
            SQLiteDataAdapter da = new SQLiteDataAdapter((SQLiteCommand)command);
            DataSet ds = new DataSet();
            // fill the data set, and return the schema information
            da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
            da.Fill(ds);
            // convert our dataset to XML
            StringReader stream = new StringReader(ds.GetXml());
            command.Connection.Close();
            // convert our stream of text to an XmlReader
            return new XmlTextReader(stream);
        }



        /// <summary>
        /// Parses parameter names from SQL Statement, assigns values from object array ,   /// and returns fully populated ParameterCollection.
        /// </summary>
        /// <param name="commandText">Sql Statement with "@param" style embedded parameters</param>
        /// <param name="paramList">object[] array of parameter values</param>
        /// <returns>SQLiteParameterCollection</returns>
        /// <remarks>Status experimental. Regex appears to be handling most issues. Note that parameter object array must be in same ///order as parameter names appear in SQL statement.</remarks>
        private static SQLiteParameterCollection AttachParameters(SQLiteCommand cmd, string commandText, params  object[] paramList)
        {
            if (paramList == null || paramList.Length == 0) return null;

            SQLiteParameterCollection coll = cmd.Parameters;
            string parmString = commandText.Substring(commandText.IndexOf("@"));
            // pre-process the string so always at least 1 space after a comma.
            parmString = parmString.Replace(",", " ,");
            // get the named parameters into a match collection
            string pattern = @"(@)S*(.*?)";
            Regex ex = new Regex(pattern, RegexOptions.IgnoreCase);
            MatchCollection mc = ex.Matches(parmString);
            string[] paramNames = new string[mc.Count];
            int i = 0;
            foreach (Match m in mc)
            {
                paramNames[i] = m.Value;
                i++;
            }

            // now let's type the parameters
            int j = 0;
            Type t = null;
            foreach (object o in paramList)
            {
                t = o.GetType();

                SQLiteParameter parm = new SQLiteParameter();
                switch (t.ToString())
                {

                    case ("DBNull"):
                    case ("Char"):
                    case ("SByte"):
                    case ("UInt16"):
                    case ("UInt32"):
                    case ("UInt64"):
                        throw new SystemException("Invalid data type");


                    case ("System.String"):
                        parm.DbType = DbType.String;
                        parm.ParameterName = paramNames[j];
                        parm.Value = (string)paramList[j];
                        coll.Add(parm);
                        break;

                    case ("System.Byte[]"):
                        parm.DbType = DbType.Binary;
                        parm.ParameterName = paramNames[j];
                        parm.Value = (byte[])paramList[j];
                        coll.Add(parm);
                        break;

                    case ("System.Int32"):
                        parm.DbType = DbType.Int32;
                        parm.ParameterName = paramNames[j];
                        parm.Value = (int)paramList[j];
                        coll.Add(parm);
                        break;

                    case ("System.Boolean"):
                        parm.DbType = DbType.Boolean;
                        parm.ParameterName = paramNames[j];
                        parm.Value = (bool)paramList[j];
                        coll.Add(parm);
                        break;

                    case ("System.DateTime"):
                        parm.DbType = DbType.DateTime;
                        parm.ParameterName = paramNames[j];
                        parm.Value = Convert.ToDateTime(paramList[j]);
                        coll.Add(parm);
                        break;

                    case ("System.Double"):
                        parm.DbType = DbType.Double;
                        parm.ParameterName = paramNames[j];
                        parm.Value = Convert.ToDouble(paramList[j]);
                        coll.Add(parm);
                        break;

                    case ("System.Decimal"):
                        parm.DbType = DbType.Decimal;
                        parm.ParameterName = paramNames[j];
                        parm.Value = Convert.ToDecimal(paramList[j]);
                        break;

                    case ("System.Guid"):
                        parm.DbType = DbType.Guid;
                        parm.ParameterName = paramNames[j];
                        parm.Value = (System.Guid)(paramList[j]);
                        break;

                    case ("System.Object"):

                        parm.DbType = DbType.Object;
                        parm.ParameterName = paramNames[j];
                        parm.Value = paramList[j];
                        coll.Add(parm);
                        break;

                    default:
                        throw new SystemException("Value is of unknown data type");

                } // end switch

                j++;
            }
            return coll;
        }

        /// <summary>
        /// Executes non query typed params from a DataRow
        /// </summary>
        /// <param name="command">Command.</param>
        /// <param name="dataRow">Data row.</param>
        /// <returns>Integer result code</returns>
        public static int ExecuteNonQueryTypedParams(IDbCommand command, DataRow dataRow)
        {
            int retVal = 0;

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Set the parameters values
                AssignParameterValues(command.Parameters, dataRow);

                retVal = ExecuteNonQuery(command);
            }
            else
            {
                retVal = ExecuteNonQuery(command);
            }

            return retVal;
        }

        /// <summary>
        /// This method assigns dataRow column values to an IDataParameterCollection
        /// </summary>
        /// <param name="commandParameters">The IDataParameterCollection to be assigned values</param>
        /// <param name="dataRow">The dataRow used to hold the command's parameter values</param>
        /// <exception cref="System.InvalidOperationException">Thrown if any of the parameter names are invalid.</exception>
        protected internal static void AssignParameterValues(IDataParameterCollection commandParameters, DataRow dataRow)
        {
            if (commandParameters == null || dataRow == null)
            {
                // Do nothing if we get no data
                return;
            }

            DataColumnCollection columns = dataRow.Table.Columns;

            int i = 0;
            // Set the parameters values
            foreach (IDataParameter commandParameter in commandParameters)
            {
                // Check the parameter name
                if (commandParameter.ParameterName == null ||
                 commandParameter.ParameterName.Length <= 1)
                    throw new InvalidOperationException(string.Format(
                           "Please provide a valid parameter name on the parameter #{0},                            the ParameterName property has the following value: '{1}'.",
                     i, commandParameter.ParameterName));

                if (columns.Contains(commandParameter.ParameterName))
                    commandParameter.Value = dataRow[commandParameter.ParameterName];
                else if (columns.Contains(commandParameter.ParameterName.Substring(1)))
                    commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];

                i++;
            }
        }

        /// <summary>
        /// This method assigns dataRow column values to an array of IDataParameters
        /// </summary>
        /// <param name="commandParameters">Array of IDataParameters to be assigned values</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values</param>
        /// <exception cref="System.InvalidOperationException">Thrown if any of the parameter names are invalid.</exception>
        protected void AssignParameterValues(IDataParameter[] commandParameters, DataRow dataRow)
        {
            if ((commandParameters == null) || (dataRow == null))
            {
                // Do nothing if we get no data
                return;
            }

            DataColumnCollection columns = dataRow.Table.Columns;

            int i = 0;
            // Set the parameters values
            foreach (IDataParameter commandParameter in commandParameters)
            {
                // Check the parameter name
                if (commandParameter.ParameterName == null ||
                 commandParameter.ParameterName.Length <= 1)
                    throw new InvalidOperationException(string.Format(
                     "Please provide a valid parameter name on the parameter #{0}, the ParameterName property has the following value: '{1}'.",
                     i, commandParameter.ParameterName));

                if (columns.Contains(commandParameter.ParameterName))
                    commandParameter.Value = dataRow[commandParameter.ParameterName];
                else if (columns.Contains(commandParameter.ParameterName.Substring(1)))
                    commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];

                i++;
            }
        }

        /// <summary>
        /// This method assigns an array of values to an array of IDataParameters
        /// </summary>
        /// <param name="commandParameters">Array of IDataParameters to be assigned values</param>
        /// <param name="parameterValues">Array of objects holding the values to be assigned</param>
        /// <exception cref="System.ArgumentException">Thrown if an incorrect number of parameters are passed.</exception>
        protected void AssignParameterValues(IDataParameter[] commandParameters, params  object[] parameterValues)
        {
            if ((commandParameters == null) || (parameterValues == null))
            {
                // Do nothing if we get no data
                return;
            }

            // We must have the same number of values as we pave parameters to put them in
            if (commandParameters.Length != parameterValues.Length)
            {
                throw new ArgumentException("Parameter count does not match Parameter Value count.");
            }

            // Iterate through the IDataParameters, assigning the values from the corresponding position in the
            // value array
            for (int i = 0, j = commandParameters.Length, k = 0; i < j; i++)
            {
                if (commandParameters[i].Direction != ParameterDirection.ReturnValue)
                {
                    // If the current array value derives from IDataParameter, then assign its Value property
                    if (parameterValues[k] is IDataParameter)
                    {
                        IDataParameter paramInstance;
                        paramInstance = (IDataParameter)parameterValues[k];
                        if (paramInstance.Direction == ParameterDirection.ReturnValue)
                        {
                            paramInstance = (IDataParameter)parameterValues[++k];
                        }
                        if (paramInstance.Value == null)
                        {
                            commandParameters[i].Value = DBNull.Value;
                        }
                        else
                        {
                            commandParameters[i].Value = paramInstance.Value;
                        }
                    }
                    else if (parameterValues[k] == null)
                    {
                        commandParameters[i].Value = DBNull.Value;
                    }
                    else
                    {
                        commandParameters[i].Value = parameterValues[k];
                    }
                    k++;
                }
            }
        }
    }
}

Codeproject上的一个封装：http://www.codeproject.com/Articles/746191/SQLite-Helper-Csharp

关于SQLite的connection string说明：http://www.connectionstrings.com/sqlite/

SQLite GUI客户端列表：http://www.sqlite.org/cvstrac/wiki?p=ManagementTools

SQLite Administrator下载地址：http://download.orbmu2k.de/files/sqliteadmin.zip

转载：http://t.zoukankan.com/endv-p-6940440.html

标签：SQLite,transaction,C#,parm,cmd,Connection,values,new,Data
来源： https://www.cnblogs.com/nuomibaibai/p/16590710.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。