C#之WPF连接sqllite数据库

最新推荐文章于 2025-07-07 15:01:23 发布

原创最新推荐文章于 2025-07-07 15:01:23 发布 · 1.7k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个C#类，用于实现WPF应用程序通过SQLite进行数据库操作。该类提供了执行SQL语句、获取最大ID、获取单条记录及填充数据表等功能。

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C#之WPF连接sqllite数据库

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SQLite;

namespace EasyEnergy.AppLogicService
{
    public class AlarmSqliteDbHelp
    {

        public static string ConnSqlLiteDbPath = @"D:\data\test.data";

        public static string ConnString
        {
            get
            {
                return string.Format("Data Source={0}", ConnSqlLiteDbPath);
            }
        }

        public static int ExecuteRefId(string sql)
        {
            SQLiteConnection connection;
            SQLiteTransaction transaction = null;
            try
            {
                connection = new SQLiteConnection(ConnString);
                connection.Open();
                var command = new SQLiteCommand(connection)
                {
                    CommandText = sql + ";SELECT last_insert_rowid()"
                };
                return Convert.ToInt32(command.ExecuteScalar());
            }
            catch (Exception)
            {
                transaction.Rollback();
                throw;
            }
        }

        public static int Execute(string sSQL, bool bUseTransaction = false)
        {
            int num;
            SQLiteConnection connection;
            //if (!bUseTransaction)
            //{
            //    connection = new SQLiteConnection(ConnString);
            //    connection.Open();
            //    var command = new SQLiteCommand(connection) {
            //        CommandText = sSQL
            //    };
            //    return command.ExecuteNonQuery();
            //}
            SQLiteTransaction transaction = null;
            try
            {
                connection = new SQLiteConnection(ConnString);
                connection.Open();
                transaction = connection.BeginTransaction();
                num = new SQLiteCommand(connection) { CommandText = sSQL }.ExecuteNonQuery();
                transaction.Commit();
            }
            catch (Exception)
            {
                transaction.Rollback();
                throw;
            }
            return num;
        }

        public static DataTable GetDataTable(string sSQL)
        {
            var connection = new SQLiteConnection(ConnString);
            connection.Open();
            var command = new SQLiteCommand
            {
                CommandText = sSQL,
                Connection = connection
            };
            var adapter = new SQLiteDataAdapter(command);
            var dataTable = new DataTable("table");
            adapter.Fill(dataTable);
            return dataTable;
        }

        public static int GetMaxId(string sKeyField, string sTableName)
        {
            DataTable dataTable = GetDataTable("select ifnull(max([" + sKeyField + "]),0) as MaxID from [" + sTableName + "]");
            if ((dataTable != null) && (dataTable.Rows.Count > 0))
            {
                return Convert.ToInt32(dataTable.Rows[0][0].ToString());
            }
            return 0;
        }

        public static object GetSingle(string sSQL)
        {
            DataTable dataTable = GetDataTable(sSQL);
            if ((dataTable != null) && (dataTable.Rows.Count > 0))
            {
                return dataTable.Rows[0][0];
            }
            return null;
        }

    }
}