264 lines
9.8 KiB
C#
264 lines
9.8 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Data.SQLite;
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using System.Linq;
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using System.Text;
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using DataParameter = System.Data.SQLite.SQLiteParameter;
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using DataCommand = System.Data.SQLite.SQLiteCommand;
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using DataAdapter = System.Data.SQLite.SQLiteDataAdapter;
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using System.Windows.Forms;
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namespace ryCommonDb
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{
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public class SQLiteDataProvider : IDbInterface
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{
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ryCommonDb.ClsDb myDb = new ryCommonDb.ClsDb();
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public int ConnDb(string sql)
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{
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string[] item = sql.Split('|');
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if (item.Length == 1)
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{
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return myDb.ConnDb(sql.Replace("<app>",Application.StartupPath),"");
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}
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else
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{ return myDb.ConnDb(item[0].Replace("<app>", Application.StartupPath), item[1]); }
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}
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public int CloseDb()
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{
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myDb.CloseDb();
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return 1;
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}
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public int GetCount(string tableName, string wheresql)
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{
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string m_where = "";
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if (wheresql != "")
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{
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m_where = " where " + wheresql;
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}
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string sql= "select count(*) from "+ tableName + m_where;
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return Convert.ToInt32(myDb.ExecuteSQL(sql,(DataParameter[])GetParameter(), "0")[0]);
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}
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public int ChangePwd(string newPwd)
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{
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myDb.ChangePwd(newPwd);
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return 1;
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}
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private List<SQLIitem> list_param = new List<SQLIitem>();
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public void AddParameter(string name,object value)
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{
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list_param.Add(new SQLIitem(name, value));
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}
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public void ClearParameter(object name, object value)
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{
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list_param.Clear();
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}
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public object[] GetParameter()
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{
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DataParameter[] defPar = new DataParameter[list_param.Count];
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for (int i = 0; i < list_param.Count; i++)
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{
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SQLIitem item = (SQLIitem)list_param[i];
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defPar[i] = new DataParameter("@" + item.Field.TrimStart('@').TrimStart('[').TrimEnd(']'), item.value);
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}
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return defPar;
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}
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public object[] GetParameter(RyQuickSQL mySQL)
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{
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DataParameter[] defPar = new DataParameter[mySQL.List.Count + mySQL.List_param.Count];
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for (int i = 0; i < mySQL.List.Count; i++)
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{
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SQLIitem item = (SQLIitem)mySQL.List[i];
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defPar[i] = new DataParameter("@" + item.Field.TrimStart('@').TrimStart('[').TrimEnd(']'), item.value);
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}
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for (int i = mySQL.List.Count; i < mySQL.List.Count + mySQL.List_param.Count; i++)
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{
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SQLIitem item = (SQLIitem)mySQL.List_param[i - mySQL.List.Count];
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defPar[i] = new DataParameter("@" + item.Field.TrimStart('@').TrimStart('[').TrimEnd(']'), item.value);
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}
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return defPar;
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}
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public string GetPageSQL(string tableName, string wheresql, string orderSQL)
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{
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return GetPageSQL("*", tableName, wheresql, orderSQL);
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}
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public string GetPageSQL2(string tableName, string wheresql, string orderSQL)
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{
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return "";
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}
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public string GetPageSQL(string field,string tableName, string wheresql, string orderSQL)
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{
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string m_where = "";
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if (wheresql != "")
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{
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m_where = " where " + wheresql;
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}
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string m_order = "";
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if (orderSQL != "")
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{
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m_order = " " + orderSQL;
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}
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return "select "+ field + " from " + tableName + m_where + m_order + " limit {pagesize} offset {recordnum}";
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}
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public string GetPageSQL2(string field,string tableName, string wheresql, string orderSQL)
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{
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return "";
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}
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public bool ContainsData(string sql, object[] Parameter)
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{
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System.Data.DataSet ds=ReadData(sql, Parameter);
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if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
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{
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return true;
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}
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return false;
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}
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public System.Data.DataSet ReadData(string sql, object[] Parameter)
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{
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DataCommand cmd = myDb.SQLite_cn.CreateCommand();
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cmd.Parameters.Clear();
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if (Parameter != null)
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cmd.Parameters.AddRange(Parameter);
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cmd.CommandText = sql;
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DataAdapter ad = new DataAdapter(cmd);
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System.Data.DataSet ds=new System.Data.DataSet();
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ad.Fill(ds);
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ad.Dispose();
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cmd.Dispose();
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return ds;
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}
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public System.Data.DataSet ReadData(string sql, RyQuickSQL mySQL)
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{
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return ReadData(sql, GetParameter(mySQL));
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}
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public System.Data.DataSet ReadData(string sql)
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{
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object[] Parameter = null;
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return ReadData(sql, Parameter);
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}
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public System.Data.DataSet ReadData(string tableName, string id)
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{
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object[] Parameter = null;
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return ReadData("select * from " + tableName + " where id=" + id, Parameter);
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}
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public int ExecuteNonQuery(string sql, object[] Parameter)
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{
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DataCommand cmd = myDb.SQLite_cn.CreateCommand();
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cmd.Parameters.Clear();
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if(Parameter!=null)
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cmd.Parameters.AddRange(Parameter);
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cmd.CommandText = sql;
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int i= cmd.ExecuteNonQuery();
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cmd.Dispose();
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return i;
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}
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public int ExecuteNonQuery(string sql, RyQuickSQL mySQL)
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{
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return ExecuteNonQuery(sql, GetParameter(mySQL));
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}
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public int ExecuteNonQuery(string sql)
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{
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object[] pram = null;
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return ExecuteNonQuery(sql, pram);
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}
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SQLiteTransaction tr;
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public void BeginTransaction()
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{
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tr= myDb.SQLite_cn.BeginTransaction();
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}
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public void Commit()
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{
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tr.Commit();
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}
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public int DelById(string tableName, string id)
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{
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object[] param = null;
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return ExecuteNonQuery("delete from " + tableName + " where id=" + id, param);
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}
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public int CreateDb(RyQuickSQL mySQL)
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{
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bool table_exist = true;
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DataCommand cmd = myDb.SQLite_cn.CreateCommand();
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cmd.Parameters.Clear();
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cmd.CommandText = "SELECT COUNT(*) FROM sqlite_master where type='table' and name='" + mySQL.TableName + "'";
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if (0 == Convert.ToInt32(cmd.ExecuteScalar()))
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{
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table_exist = false;
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}
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else
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{
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table_exist = true;
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}
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cmd.Dispose();
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if (table_exist)
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{
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System.Data.DataSet ds = ReadData("select * from " + mySQL.TableName + " limit 1");
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for (int i = 0; i < mySQL.List.Count; i++)
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{
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#region 循环表字段，如果不存在就创建
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SQLIitem item = (SQLIitem)mySQL.List[i];
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if (ds.Tables[0].Columns.Contains(item.Field))
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{ continue; }
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string Field = "";
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if (item.value is string)
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{
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Field = "[" + item.Field.TrimStart('[').TrimEnd(']') + "] TEXT COLLATE NOCASE";
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}
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else if (item.value is int || item.value is Int64)
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{
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Field = "[" + item.Field.TrimStart('[').TrimEnd(']') + "] INTEGER DEFAULT 0";
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}
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else if (item.value is double || item.value is float)
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{
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Field = "[" + item.Field.TrimStart('[').TrimEnd(']') + "] FLOAT DEFAULT 0";
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}
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else if (item.value is DateTime)
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{
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Field = "[" + item.Field.TrimStart('[').TrimEnd(']') + "] DATETIME";
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}
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try
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{
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object[] param = null;
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ExecuteNonQuery("ALTER TABLE " + mySQL.TableName + " ADD COLUMN " + Field, param);
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}
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catch (Exception) { }
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#endregion
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}
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return 1;
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}
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else
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{
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#region 创建表
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string tmpSQL = "CREATE TABLE " + mySQL.TableName + " ([ID] INTEGER PRIMARY KEY,";
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for (int i = 0; i < mySQL.List.Count; i++)
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{
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SQLIitem item = (SQLIitem)mySQL.List[i];
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if (item.value is string)
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{
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tmpSQL += "[" + item.Field.TrimStart('[').TrimEnd(']') + "] TEXT COLLATE NOCASE,";
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}
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else if (item.value is int || item.value is Int64)
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{
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tmpSQL += "[" + item.Field.TrimStart('[').TrimEnd(']') + "] INTEGER DEFAULT 0,";
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}
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else if (item.value is double || item.value is float)
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{
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tmpSQL += "[" + item.Field.TrimStart('[').TrimEnd(']') + "] FLOAT DEFAULT 0,";
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}
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else if (item.value is DateTime)
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{
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tmpSQL += "[" + item.Field.TrimStart('[').TrimEnd(']') + "] DATETIME,";
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}
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}
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object[] param = null;
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return ExecuteNonQuery(tmpSQL.Substring(0, tmpSQL.Length - 1) + ")", param);
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#endregion
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}
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}
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public void Free()
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{
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list_param.Clear();
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myDb.CloseDb();
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}
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}
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}
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