SQLite安裝
1. windows安裝
1. 進入官網下載最新的SQLite版本,找到:sqlite-tools-osx-x86-3150100.zip。[不區分64位和32位]
http://www.sqlite.org/download.html
2. 設置環境變量
將下載的文件解壓到特定的目錄,並在windows上設置環境變量目錄!
3. 打開cmd,執行如下命令進行安裝配置調試:
sqlite3 test1;
create table person(name varchar(30),age int);
insert into person values ('張三',23);
select * from person;
2. linux安裝
方法一:
wget http://www.sqlite.org/sqlite-autoconf-3070500.tar.gz
tar xvzf sqlite-autoconf-3070500.tar.gz
cd sqlite-autoconf-3070500
./configure
make
sudo make install
方法二:
sudo yum install sqlite-devel
方法三:
sudo gem install sqlite3-ruby
C# 公共代碼實現類
1. Nuget 引入Mono.Data.SQLite 文件!
2 . 公共代碼類
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Mono.Data.Sqlite;
using System.Data;
using System.Collections;
using System.Configuration;
namespace DAL
{
/// <summary>
/// 數據訪問基礎類(基於SQLite)
/// 可以用戶可以修改滿足自己項目的需要。
/// </summary>
public abstract class DbHelperSQLite
{
//數據庫連接字符串(web.config來配置),可以動態更改connectionString支持多數據庫.
public static string connectionString =ConfigurationManager.AppSettings["dbstring"];
public DbHelperSQLite()
{
}
#region 公用方法
public static int GetMaxID(string FieldName, string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = GetSingle(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
public static bool Exists(string strSql)
{
object obj = GetSingle(strSql);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
public static bool Exists(string strSql, params SqliteParameter[] cmdParms)
{
object obj = GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#endregion
#region 執行簡單SQL語句
/// <summary>
/// 執行SQL語句,返回影響的記錄數
/// </summary>
/// <param name="SQLString">SQL語句</param>
/// <returns>影響的記錄數</returns>
public static int ExecuteSql(string SQLString)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
using (SqliteCommand cmd = new SqliteCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (SqliteException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 執行多條SQL語句,實現數據庫事務。
/// </summary>
/// <param name="SQLStringList">多條SQL語句</param>
public static void ExecuteSqlTran(ArrayList SQLStringList)
{
using (SqliteConnection conn = new SqliteConnection(connectionString))
{
conn.Open();
SqliteCommand cmd = new SqliteCommand();
cmd.Connection = conn;
SqliteTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n].ToString();
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
}
catch (SqliteException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
/// <summary>
/// 執行帶一個存儲過程參數的的SQL語句。
/// </summary>
/// <param name="SQLString">SQL語句</param>
/// <param name="content">參數內容,比如一個字段是格式複雜的文章,有特殊符號,可以通過這個方式添加</param>
/// <returns>影響的記錄數</returns>
public static int ExecuteSql(string SQLString, string content)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
SqliteCommand cmd = new SqliteCommand(SQLString, connection);
SqliteParameter myParameter = new SqliteParameter("@content", DbType.String);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (SqliteException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 向數據庫裏插入圖像格式的字段(和上面情況類似的另一種實例)
/// </summary>
/// <param name="strSQL">SQL語句</param>
/// <param name="fs">圖像字節,數據庫的字段類型爲image的情況</param>
/// <returns>影響的記錄數</returns>
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
SqliteCommand cmd = new SqliteCommand(strSQL, connection);
SqliteParameter myParameter = new SqliteParameter("@fs", DbType.Binary);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (SqliteException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 執行一條計算查詢結果語句,返回查詢結果(object)。
/// </summary>
/// <param name="SQLString">計算查詢結果語句</param>
/// <returns>查詢結果(object)</returns>
public static object GetSingle(string SQLString)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
using (SqliteCommand cmd = new SqliteCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (SqliteException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 執行查詢語句,返回SqliteDataReader
/// </summary>
/// <param name="strSQL">查詢語句</param>
/// <returns>SqliteDataReader</returns>
public static SqliteDataReader ExecuteReader(string strSQL)
{
SqliteConnection connection = new SqliteConnection(connectionString);
SqliteCommand cmd = new SqliteCommand(strSQL, connection);
try
{
connection.Open();
SqliteDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch (SqliteException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 執行查詢語句,返回DataSet
/// </summary>
/// <param name="SQLString">查詢語句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqliteDataAdapter command = new SqliteDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (SqliteException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
#endregion
#region 執行帶參數的SQL語句
/// <summary>
/// 執行SQL語句,返回影響的記錄數
/// </summary>
/// <param name="SQLString">SQL語句</param>
/// <returns>影響的記錄數</returns>
public static int ExecuteSql(string SQLString, params SqliteParameter[] cmdParms)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
using (SqliteCommand cmd = new SqliteCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (SqliteException E)
{
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 執行多條SQL語句,實現數據庫事務。
/// </summary>
/// <param name="SQLStringList">SQL語句的哈希表(key爲sql語句,value是該語句的SqliteParameter[])</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (SqliteConnection conn = new SqliteConnection(connectionString))
{
conn.Open();
using (SqliteTransaction trans = conn.BeginTransaction())
{
SqliteCommand cmd = new SqliteCommand();
try
{
//循環
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
SqliteParameter[] cmdParms = (SqliteParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// 執行一條計算查詢結果語句,返回查詢結果(object)。
/// </summary>
/// <param name="SQLString">計算查詢結果語句</param>
/// <returns>查詢結果(object)</returns>
public static object GetSingle(string SQLString, params SqliteParameter[] cmdParms)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
using (SqliteCommand cmd = new SqliteCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (SqliteException e)
{
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 執行查詢語句,返回SqliteDataReader
/// </summary>
/// <param name="strSQL">查詢語句</param>
/// <returns>SqliteDataReader</returns>
public static SqliteDataReader ExecuteReader(string SQLString, params SqliteParameter[] cmdParms)
{
SqliteConnection connection = new SqliteConnection(connectionString);
SqliteCommand cmd = new SqliteCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
SqliteDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch (SqliteException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 執行查詢語句,返回DataSet
/// </summary>
/// <param name="SQLString">查詢語句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params SqliteParameter[] cmdParms)
{
using (SqliteConnection connection = new SqliteConnection(connectionString))
{
SqliteCommand cmd = new SqliteCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (SqliteDataAdapter da = new SqliteDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (SqliteException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
private static void PrepareCommand(SqliteCommand cmd, SqliteConnection conn, SqliteTransaction trans, string cmdText, SqliteParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (SqliteParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
#endregion
}
}
3. 使用Linq2db 讓SQLite支持Linq
參考文檔:http://www.cnblogs.com/lxzhangying/p/3227110.html
目前該方法不支持Linxu下操作!
參考文檔:
http://blog.itpub.net/26230597/viewspace-1260552/
http://www.weste.net/2014/10-08/99347.html
http://www.cnblogs.com/vingi/articles/4302497.html
https://my.oschina.net/lbp0200/blog/194025