temu客户端程序

AllBase/SqliteHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data;
+using System.Data.SQLite;
+using System.Configuration;
+using System.IO;
+using System.Data.Common;
+
+namespace AllBase
+{
+    public class SqliteHelper
+    {
+        //获取连接字符串
+
+        private static readonly string str = "data source =DB.dll"; //ConfigurationManager.ConnectionStrings["conStr"].ConnectionString;
+
+        public static void CreateProductTable()
+        {
+            DBConfig.DBName = "DB.dll";
+            DBConfig.CreateDbFile();
+            DBConfig.CreateProductTable();
+        }
+         
+        /// <summary>
+        /// 做增删改的功能
+        /// </summary>
+        /// <param name="sql">sql语句</param>
+        /// <param name="ps">sql语句中的参数</param>
+        /// <returns>受影响的行数</returns>
+        public static int ExecuteNonQuery(string sql, params SQLiteParameter[] ps)
+        {
+            try
+            {
+                //连接数据库
+                using (SQLiteConnection con = new SQLiteConnection(str))
+                {
+                    using (SQLiteCommand cmd = new SQLiteCommand(sql, con))
+                    {
+                        con.Open();//打开数据库
+                        if (ps != null)
+                        {
+                            cmd.Parameters.AddRange(ps);//参数
+                        }
+                        return cmd.ExecuteNonQuery();
+                    }
+                }
+            }
+            catch 
+            {
+            }
+            return 0;
+        }
+
+        public static int ExecuteNonQueryInsert(string sql, SQLiteCommand cmd)
+        {
+            try
+            {
+                 cmd.CommandText = sql;
+                 return  cmd.ExecuteNonQuery();
+            }
+            catch(Exception ex)
+            {
+            }
+            return 0;
+        }
+
+        /// <summary>
+        /// 做增删改的功能
+        /// </summary>
+        /// <param name="sql">sql语句</param>
+        /// <param name="ps">sql语句中的参数</param>
+        /// <returns>受影响的行数</returns>
+        public static int BatchExecuteNonQuery(List<string> lst)
+        {
+            try
+            {
+                using (SQLiteConnection con = new SQLiteConnection(str))
+                {
+                    using (SQLiteCommand cmd = new SQLiteCommand())
+                    {
+                        con.Open();
+                        cmd.Connection = con;
+                        using (var transaction = con.BeginTransaction())
+                        {
+                            for (int i = 0; i < lst.Count; i++)
+                            {
+                                ExecuteNonQueryInsert(lst[i],cmd);
+                            }
+                            transaction.Commit();
+                        }
+                        con.Close();
+                    }
+                }
+            }
+            catch 
+            {
+ 
+            }
+            return 0;
+        }
+        /// <summary>
+        /// 去掉SQL中的特殊字符
+        /// </summary>
+        /// <param name="value">字符串</param>
+        /// <returns></returns>
+        public static string ReplaceSqlx(string value)
+        {
+            if (string.IsNullOrEmpty(value))
+                return null;
+            value = value.Replace("\\", "\\\\");
+            value = value.Replace("'", "''");
+            //value = value.Replace("\"", "\\\"");
+            return value;
+        }
+
+        /// <summary>
+        /// 首行首列
+        /// </summary>
+        /// <param name="sql">sql语句</param>
+        /// <param name="ps">sql语句中的参数</param>
+        /// <returns>返回的是首行首列</returns>
+        public static object ExecuteScalar(string sql, params SQLiteParameter[] ps)
+        {
+            using (SQLiteConnection con = new SQLiteConnection(str))
+            {
+                using (SQLiteCommand cmd = new SQLiteCommand(sql, con))
+                {
+                    con.Open();
+                    if (ps != null)
+                    {
+                        cmd.Parameters.AddRange(ps);
+                    }
+                    return cmd.ExecuteScalar();
+                }
+            }
+        }
+        /// <summary>
+        /// 查询的
+        /// </summary>
+        /// <param name="sql">sql语句</param>
+        /// <param name="ps">sql语句中的参数</param>
+        /// <returns>返回的是SqliteDataReader</returns>
+        public static SQLiteDataReader ExecuteReader(string sql, params SQLiteParameter[] ps)
+        {
+            SQLiteConnection con = new SQLiteConnection(str);
+            using (SQLiteCommand cmd = new SQLiteCommand(sql, con))
+            {
+                if (ps != null)
+                {
+                    cmd.Parameters.AddRange(ps);
+                }
+                try
+                {
+                    con.Open();
+                    return cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
+                }
+                catch (Exception ex)
+                {
+                    con.Close();
+                    con.Dispose();
+                    throw ex;
+                }
+            }
+        }
+        /// <summary>
+        /// 查询数据
+        /// </summary>
+        /// <param name="sql">sql语句</param>
+        /// <param name="ps">sql语句中的参数</param>
+        /// <returns>返回表</returns>
+        public static DataTable ExecuteTable(string sql, params SQLiteParameter[] ps)
+        {
+            try
+            {
+            DataTable dt = new DataTable();
+            using (SQLiteDataAdapter sda=new SQLiteDataAdapter(sql,str))
+            {
+                if (ps!=null)
+                {
+                    sda.SelectCommand.Parameters.AddRange(ps);
+                }
+                sda.Fill(dt);
+                return dt;
+            }
+            }
+            catch
+            {
+            }
+            return new DataTable();
+        }
+    }
+
+    public class DBConfig
+    {
+        public static string DBName = "DB.dll"; //数据库的名字
+
+        public static string DataSource
+        {
+            get
+            {
+                string databaseFile = GetDatabaseFile();
+                return string.Format("data source={0}", databaseFile);
+            }
+        }
+        public static void CreateDirectory(string dir)
+        {
+            if (!Directory.Exists(dir))
+            {
+                Directory.CreateDirectory(dir);
+            }
+        }
+
+        public static bool CreateDbFile()
+        {
+            string databaseFile = GetDatabaseFile();
+            try
+            {
+                CreateDirectory(Path.GetDirectoryName(databaseFile));
+                if (!File.Exists(databaseFile))
+                {
+                    SQLiteConnection.CreateFile(databaseFile);
+                }
+                return true;
+            }
+            catch (Exception ex)
+            {
+                throw new Exception("新建数据库文件" + databaseFile + "失败：" + ex.Message);
+            }
+        }
+
+        private static string GetDatabaseFile()
+        {
+            string databaseFile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory,DBName);
+            return databaseFile;
+        }
+
+        public static void CreateProductTable()
+        {
+            string sql = "CREATE TABLE if not exists Product (content STRING, fromid STRING PRIMARY KEY);";
+            try
+            {
+                SqliteHelper.ExecuteNonQuery(sql);
+            }
+            catch
+            {
+            }
+        }
+    }
+}