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  • SQLiteHelper Angkor:

    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Data.SQLite;
    using System.Data;
    using System.Data.Common;
    
    namespace Com.Luminji.DataService.SQLHelpers
    {
        public class SQLiteHelper
        {
            /// <summary>
            /// ConnectionString样例:Data Source=Test.db3;Pooling=true;FailIfMissing=false
            /// </summary>
            public static string ConnectionString { get; set; }
    
            private static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, string cmdText, params object[] p)
            {
                if (conn.State != ConnectionState.Open)
                    conn.Open();
                cmd.Parameters.Clear();
                cmd.Connection = conn;
                cmd.CommandText = cmdText;
                cmd.CommandType = CommandType.Text;
                cmd.CommandTimeout = 30;
                if (p != null)
                {
                    foreach (object parm in p)
                        cmd.Parameters.AddWithValue(string.Empty, parm);
                }
            }
    
            public static DataSet ExecuteQuery(string cmdText, params object[] p)
            {
                using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
                {
                    using (SQLiteCommand command = new SQLiteCommand())
                    {
                        DataSet ds = new DataSet();
                        PrepareCommand(command, conn, cmdText, p);
                        SQLiteDataAdapter da = new SQLiteDataAdapter(command);
                        da.Fill(ds);
                        return ds;
                    }
                }
            }
    
            public static int ExecuteNonQuery(string cmdText, params object[] p)
            {
                using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
                {
                    using (SQLiteCommand command = new SQLiteCommand())
                    {
                        PrepareCommand(command, conn, cmdText, p);
                        return command.ExecuteNonQuery();
                    }
                }
            }
    
            public static SQLiteDataReader ExecuteReader(string cmdText, params object[] p)
            {
                using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
                {
                    using (SQLiteCommand command = new SQLiteCommand())
                    {
                        PrepareCommand(command, conn, cmdText, p);
                        return command.ExecuteReader(CommandBehavior.CloseConnection);
                    }
                }
            }
    
            public static object ExecuteScalar(string cmdText, params object[] p)
            {
                using (SQLiteConnection conn = new SQLiteConnection(ConnectionString))
                {
                    using (SQLiteCommand command = new SQLiteCommand())
                    {
                        PrepareCommand(command, conn, cmdText, p);
                        return command.ExecuteScalar();
                    }
                }
            }
    
        }
    }
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  • 原文地址:https://www.cnblogs.com/wujiakun/p/2230398.html
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