358 lines
13 KiB
C#
358 lines
13 KiB
C#
using MySql.Data.MySqlClient;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.SqlClient;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace Face.Services.DBUtility.Common
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{
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public class DALHelper<TEntity> where TEntity : class, new()
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{
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private string databasetablename; //数据库表名前缀
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//private DbConfigsInfo confInfi;
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public DALHelper()
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{
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databasetablename = "TBL_UTS_Manage";
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}
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public DALHelper(string _databaseprefix)
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{
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databasetablename = _databaseprefix;
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}
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/// <summary>
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/// 是否存在该记录
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/// </summary>
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public bool Exists(TEntity entity, string strField, object keyValue)
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{
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StringBuilder strSql = new StringBuilder();
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strSql.Append("select count(1) from " + databasetablename);
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strSql.Append(" where " + strField + "=@keyValue ");
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MySqlParameter[] parameters = {
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new MySqlParameter("@keyValue",keyValue)
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};
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return DbHelperMySQL.Exists(strSql.ToString(), parameters);
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}
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/// <summary>
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/// 得到最大ID
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/// </summary>
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public int GetMaxId(TEntity entity, string strField)
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{
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return DbHelperMySQL.GetMaxID(strField, databasetablename);
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}
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//public bool Add(TEntity entity)
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//{
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// StringBuilder strSql = new StringBuilder();
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// strSql.Append("insert into " + databasetablename + "(");
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// PropertyInfo[] propertys = entity.GetType().GetProperties();// 获得此模型的公共属性
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// List<SqlParameter> parameters = new List<SqlParameter>();
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// foreach (PropertyInfo pi in propertys)
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// {
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// if (!pi.CanWrite) continue;
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// strSql.Append(pi.Name + ",");
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// strSql.Append(" values (");
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// }
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// strSql.Append(" ) values (");
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// foreach (PropertyInfo pi in propertys)
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// {
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// if (!pi.CanWrite) continue;
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// strSql.Append(pi.Name + "@,");
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// parameters.Add(new SqlParameter("@" + pi.Name, pi.GetValue(entity)));
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// }
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// strSql.Append(");select @@IDENTITY");
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// int rows = DbHelperMySQL.ExecuteSql(strSql.ToString(), parameters.ToArray());
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// if (rows > 0)
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// {
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// return true;
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// }
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// else
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// {
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// return false;
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// }
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//}
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///// <summary>
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///// 修改一个实体数据
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///// </summary>
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///// <param name="entity"></param>
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///// <param name="strField"></param>
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///// <param name="keyValue"></param>
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///// <returns></returns>
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//public bool Update(TEntity entity, string strField, object keyValue)
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//{
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// StringBuilder strSql = new StringBuilder();
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// strSql.Append("update " + databasetablename + " set ");
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// PropertyInfo[] propertys = entity.GetType().GetProperties();// 获得此模型的公共属性
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// List<SqlParameter> parameters = new List<SqlParameter>();
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// foreach (PropertyInfo pi in propertys)
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// {
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// if (!pi.CanWrite) continue;
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// strSql.Append(pi.Name + "=@" + pi.Name + ",");
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// parameters.Add(new SqlParameter("@" + pi.Name, pi.GetValue(entity)));
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// }
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// strSql.Append(" where " + strField + "=@strValue");
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// parameters.Add(new MySqlParameter("@strValue", keyValue));
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// int rows = DbHelperMySQL.ExecuteSql(strSql.ToString(), parameters.ToArray());
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// if (rows > 0)
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// {
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// return true;
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// }
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// else
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// {
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// return false;
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// }
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//}
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/// <summary>
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/// 修改一列数据
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/// </summary>
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public int UpdateField(TEntity entity, string strField, object strValue, string strWhere)
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{
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StringBuilder strSql = new StringBuilder();
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strSql.Append("update " + databasetablename);
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strSql.Append(" set " + strField + "=@strValue");
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if (!string.IsNullOrEmpty(strWhere))
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{
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strSql.Append(" where " + strWhere);
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}
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SqlParameter[] parameters = {
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new SqlParameter("@strValue",strValue)
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};
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return DbHelperMySQL.ExecuteSql(strSql.ToString());
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}
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/// <summary>
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/// 删除一条数据
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/// </summary>
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public bool Delete(TEntity entity, string strField, object keyValue)
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{
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StringBuilder strSql = new StringBuilder();
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strSql.Append("delete from " + databasetablename);
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strSql.Append(" where " + strField + "=@keyValue ");
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MySqlParameter[] parameters = {
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new MySqlParameter("@keyValue",keyValue)
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};
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int rows = DbHelperMySQL.ExecuteSql(strSql.ToString(), parameters);
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if (rows > 0)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 执行查询语句，返回MySqlDataReader ( 注意：调用该方法后，一定要对MySqlDataReader进行Close )
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/// </summary>
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/// <param name="strSQL">查询语句</param>
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/// <returns>MySqlDataReader</returns>
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//public static void ExecuteReader(string strSQL, Action<MySqlDataReader> func)
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//{
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// try
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// {
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// using (MySqlConnection connection = new MySqlConnection(connectionString))
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// {
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// using (MySqlCommand cmd = new MySqlCommand(strSQL, connection))
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// {
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// connection.Open();
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// using (MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection))
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// {
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// func(myReader);
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// }
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// }
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// }
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// }
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// catch (MySqlException e)
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// {
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// throw e;
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// }
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//}
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/// <summary>
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/// 得到一个对象实体
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/// </summary>
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/// <param name="uid"></param>
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/// <returns></returns>
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public TEntity GetModel(TEntity entity, string strField, string keyValue)
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{
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StringBuilder strSql = new StringBuilder();
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strSql.Append("select * from " + databasetablename);
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strSql.Append(" where " + strField + "=@keyValue ");
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strSql.Append(" LIMIT 0,1;");
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MySqlParameter[] parameters = {
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new MySqlParameter("@keyValue",keyValue)
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};
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DataSet ds = DbHelperMySQL.Query(strSql.ToString(), parameters);
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if (ds.Tables[0].Rows.Count > 0)
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{
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return DataRowToModel(entity, ds.Tables[0]);
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}
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else
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{
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return null;
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}
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}
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public List<TEntity> GetList(string strWhere = null)
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{
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StringBuilder strSql = new StringBuilder();
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strSql.Append("select * from " + databasetablename);
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if (!string.IsNullOrEmpty(strWhere))
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{
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strSql.Append(" where " + strWhere);
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}
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//strSql.Append(" LIMIT 0,1;");
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TEntity entity = new TEntity();
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DataSet ds = DbHelperMySQL.Query(strSql.ToString());
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if (ds.Tables[0].Rows.Count > 0)
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{
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return DataRowToModels(entity, ds.Tables[0]);
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}
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else
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{
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return null;
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}
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}
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/// <summary>
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/// 将DataTable转换得到一个对象实体
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/// </summary>
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/// <param name="model"></param>
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/// <param name="dt"></param>
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/// <returns></returns>
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public TEntity DataRowToModel(TEntity model, DataTable dt)
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{
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if (dt.Rows.Count > 0)
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{
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TEntity t = new TEntity();
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PropertyInfo[] propertys = t.GetType().GetProperties();// 获得此模型的公共属性
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foreach (PropertyInfo pi in propertys)
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{
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if (dt.Columns.Contains(pi.Name))
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{
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if (!pi.CanWrite) continue;
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var value = dt.Rows[0][pi.Name];
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if (value != DBNull.Value)
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{
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switch (pi.PropertyType.FullName)
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{
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case "System.Decimal":
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pi.SetValue(t, decimal.Parse(value.ToString()), null);
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break;
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case "System.String":
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pi.SetValue(t, value.ToString(), null);
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break;
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case "System.Single":
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pi.SetValue(t, float.Parse(value.ToString()), null);
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break;
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case "System.Double":
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pi.SetValue(t, double.Parse(value.ToString()), null);
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break;
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case "System.Int32":
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pi.SetValue(t, int.Parse(value.ToString()), null);
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break;
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case "System.DateTime":
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pi.SetValue(t, DateTime.Parse(value.ToString()), null);
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break;
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case "System.Boolean":
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pi.SetValue(t, bool.Parse(value.ToString()), null);
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break;
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default:
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pi.SetValue(t, value, null);
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break;
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}
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}
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}
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}
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return t;
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}
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else
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{
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return null;
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}
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}
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/// <summary>
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/// 将DataTable转换得到一个对象实体集合
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/// </summary>
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/// <param name="model"></param>
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/// <param name="dt"></param>
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/// <returns></returns>
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public List<TEntity> DataRowToModels(TEntity model, DataTable dt)
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{
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List<TEntity> ts = new List<TEntity>();// 定义集合
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foreach (DataRow dr in dt.Rows)
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{
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TEntity t = new TEntity();
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PropertyInfo[] propertys = t.GetType().GetProperties();// 获得此模型的公共属性
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foreach (PropertyInfo pi in propertys)
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{
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if (dt.Columns.Contains(pi.Name))
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{
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if (!pi.CanWrite) continue;
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var value = dr[pi.Name];
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if (value != DBNull.Value)
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{
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switch (pi.PropertyType.FullName)
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{
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case "System.Decimal":
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pi.SetValue(t, decimal.Parse(value.ToString()), null);
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break;
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case "System.String":
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pi.SetValue(t, value.ToString(), null);
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break;
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case "System.Single":
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pi.SetValue(t, float.Parse(value.ToString()), null);
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break;
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case "System.Double":
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pi.SetValue(t, double.Parse(value.ToString()), null);
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break;
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case "System.Int32":
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pi.SetValue(t, int.Parse(value.ToString()), null);
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break;
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case "System.DateTime":
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pi.SetValue(t, DateTime.Parse(value.ToString()), null);
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break;
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case "System.Boolean":
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pi.SetValue(t, bool.Parse(value.ToString()), null);
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break;
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default:
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pi.SetValue(t, value, null);
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break;
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}
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}
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}
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}
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ts.Add(t);
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}
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return ts;
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}
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}
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}
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