c#EntityFormwork框架工具類
阿新 • • 發佈：2018-11-11
using System; using System.Collections.Generic; using System.Data.Entity; using System.Linq; using System.Web; using System.Linq.Expressions; namespace CompanyWeb.Content.Tools { /// <summary> /// Entity FrameWork幫助類（提供各種對資料的操作方法） /// </summary> /// <typeparam name="TDbContext"></typeparam> public class EFTools<TDbContext> where TDbContext : DbContext, new() { /// <summary> /// 獲取所有的實體 zhaolin /// </summary> /// <typeparam name="T"> 泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <returns>結果集</returns> public List<T> GetAllEntity<T>() where T : class { try { using (TDbContext db = new TDbContext()) { return db.Set<T>().ToList(); } } catch (Exception ex) { Console.WriteLine(ex.Message); return new List<T>(); } } /// <summary> /// 獲取單個實體(條件的最後一條) /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="whereProc">過濾的表示式</param> /// <returns>實體</returns> public T GetSingleEntityLast<T, Tkey>(Expression<Func<T, bool>> whereProc, Expression<Func<T, Tkey>> orderProc, string desc) where T : class { try { using (TDbContext ef = new TDbContext()) { if (desc == "desc") { return ef.Set<T>().Where(whereProc).OrderByDescending(orderProc).FirstOrDefault(); } return ef.Set<T>().Where(whereProc).OrderBy(orderProc).FirstOrDefault(); // return ef.Set<T>().FirstOrDefault(whereProc); } } catch (Exception ex) { Console.WriteLine(ex.Message); return null; } } /// <summary> /// 獲取所有的實體可排序 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="orderProc"> 排序表示式</param> /// <param name="orderByType">排序的型別 預設是升序，降序（desc）</param> /// <returns>結果集</returns> public List<T> GetAllEntityByOrder<T, TKey>(Expression<Func<T, TKey>> orderProc, string orderByType) where T : class { try { using (TDbContext db = new TDbContext()) { if (orderByType == "desc") { return db.Set<T>().OrderByDescending(orderProc).ToList(); } return db.Set<T>().OrderBy(orderProc).ToList(); } } catch (Exception) { return new List<T>(); } } /// <summary> /// 獲取所有的實體可排序 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="whereProc"> 過濾的表示式</param> /// <returns>結果集</returns> public List<T> GetAllEntityByWhere<T>(Expression<Func<T, bool>> whereProc) where T : class { try { using (TDbContext db = new TDbContext()) { return db.Set<T>().Where(whereProc).ToList(); } } catch (Exception ex) { Console.WriteLine(ex.Message); return new List<T>(); } } /// <summary> /// 獲取所有的實體可排序 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <typeparam name="TKey">成員屬性的型別</typeparam> /// /// <param name="whereProc">過濾的表示式</param> /// <param name="orderProc">排序的表示式</param> /// <param name="orderByType">排序的型別</param> /// <returns>結果集</returns> public List<T> GetAllEntityOrderAndWhere<T, TKey>(Expression<Func<T, bool>> whereProc, Expression<Func<T, TKey>> orderProc, string orderByType) where T : class { try { using (TDbContext db = new TDbContext()) { if (orderByType == "desc") { return db.Set<T>().Where(whereProc).OrderByDescending(orderProc).ToList(); } return db.Set<T>().Where(whereProc).OrderBy(orderProc).ToList(); } } catch (Exception) { return new List<T>(); } } /// <summary> /// 獲取某一個實體型別的所有資料並排序 /// </summary> /// <typeparam name="TEntity">待查詢的實體的型別</typeparam> /// <typeparam name="TKey">排序的條件的屬性的數值型別</typeparam> /// <param name="OrderByProc">排序的lambda表示式</param> /// <param name="IsDesc">false 順序 true 逆序</param> /// <returns>失敗或者沒有資料 返回 空集合 否則返回 查詢的到結果集</returns> public List<TEntity> GetAllEntitysAndOrderBy<TEntity, TKey>(Expression<Func<TEntity, TKey>> OrderByProc, bool IsDesc) where TEntity : class { try { using (TDbContext db = new TDbContext()) { if (IsDesc) { return db.Set<TEntity>().OrderByDescending(OrderByProc).ToList(); } return db.Set<TEntity>().OrderBy(OrderByProc).ToList(); } } catch (Exception exp) { Console.WriteLine(exp.Message); return new List<TEntity>(); } } /// <summary> /// 獲取單個實體 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="whereProc">過濾的表示式</param> /// <returns>實體</returns> public T GetSingleEntity<T>(Expression<Func<T, bool>> whereProc) where T : class { try { using (TDbContext ef = new TDbContext()) { return ef.Set<T>().Where(whereProc).FirstOrDefault(); // return ef.Set<T>().FirstOrDefault(whereProc); } } catch (Exception) { return null; } } /// <summary> /// 按條件查詢排序後獲取最後一個 /// </summary> /// <typeparam name="TEntity"></typeparam> /// <typeparam name="TKey"></typeparam> /// <param name="WhereProc"></param> /// <param name="OrderByProcDesc"></param> /// <returns></returns> public TEntity GetLastEntity<TEntity, TKey>(Expression<Func<TEntity, bool>> WhereProc, Expression<Func<TEntity, TKey>> OrderByProcDesc) where TEntity : class { try { using (TDbContext db = new TDbContext()) { return db.Set<TEntity>().Where(WhereProc).OrderByDescending(OrderByProcDesc).FirstOrDefault(); } } catch (Exception exp) { Console.WriteLine(exp.Message); return null; } } /// <summary> /// 獲取分頁的實體 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <typeparam name="TKey">成員屬性的型別</typeparam> /// <param name="pageIndex">當前的頁碼</param> /// <param name="pageCount">每頁顯示的行數</param> /// <param name="orderProc">排序的表示式</param> /// <param name="orderByType">排序的型別</param> /// <returns></returns> public List<T> GetPageEntityByOrder<T, TKey>(int pageIndex, int pageCount, Expression<Func<T, TKey>> orderProc, string orderByType) where T : class { try { using (TDbContext ef = new TDbContext()) { if (orderByType == "desc") { return ef.Set<T>().OrderByDescending(orderProc).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } return ef.Set<T>().OrderBy(orderProc).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } } catch (Exception) { return new List<T>(); } } /// <summary> /// 獲取分頁的實體 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <typeparam name="TKey">成員屬性的型別</typeparam> /// <param name="pageIndex">當前的頁碼</param> /// <param name="pageCount">每頁顯示的行數</param> /// <param name="whereProc">過濾的表示式</param> /// <param name="orderProc">排序的表示式</param> /// <param name="orderByType">排序的型別</param> /// <returns></returns> public List<T> GetPageEntityByOrderAndWhere<T, TKey>(int pageIndex, int pageCount, Expression<Func<T, bool>> whereProc, Expression<Func<T, TKey>> orderProc, string orderByType) where T : class { try { using (TDbContext ef = new TDbContext()) { if (orderByType == "desc") { return ef.Set<T>().OrderByDescending(orderProc).Where(whereProc).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } return ef.Set<T>().OrderBy(orderProc).Where(whereProc).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } } catch (Exception ex) { Console.WriteLine(ex.Message); return new List<T>(); } } /// <summary> ///獲取 按條件過濾排序分組 資料 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <typeparam name="TKey">成員屬性的型別</typeparam> /// <typeparam name="TKey2">成員屬性的型別</typeparam> /// <param name="whereProc">過濾的表示式</param> /// <param name="orderProc">排序的表示式</param> /// <param name="orderByType">排序的型別</param> /// <param name="groupProc">分組的表示式</param> /// <returns></returns> public List<T> GetEntityAndGroup<T, TKey, TKey2>(Expression<Func<T, bool>> whereProc, Expression<Func<T, TKey>> orderProc, string orderByType, Expression<Func<T, TKey2>> groupProc) where T : class { try { List<T> list = new List<T>(); using (TDbContext ef = new TDbContext()) { if (orderByType == "desc") { var Groups = ef.Set<T>().Where(whereProc).OrderByDescending(orderProc).GroupBy(groupProc).ToList(); Groups.ForEach(G => { list.AddRange(G); }); } else { var Groups = ef.Set<T>().Where(whereProc).OrderBy(orderProc).GroupBy(groupProc).ToList(); Groups.ForEach(G => { list.AddRange(G); }); } return list; } } catch (Exception) { return new List<T>(); } } /// <summary> /// 分頁 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="pageIndex">當前是第幾頁</param> /// <param name="pageCount">每一頁的行數</param> /// <returns></returns> public List<T> GetEntityByPage<T, Tkey>(int pageIndex, int pageCount, Expression<Func<T, Tkey>> orderExp, Expression<Func<T, bool>> whereExp) where T : class { try { TDbContext db = new TDbContext(); if (whereExp == null) { return db.Set<T>().OrderBy(orderExp).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } else { return db.Set<T>().OrderBy(orderExp).Where(whereExp).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } } catch (Exception) { return null; } } /// <summary> /// 獲取總條數 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="whereExp"></param> /// <returns></returns> public int GetAllCount<T>(Expression<Func<T, bool>> whereExp) where T : class { TDbContext db = new TDbContext(); if (whereExp == null) { return db.Set<T>().ToList().Count; } else { return db.Set<T>().Where(whereExp).ToList().Count; } } /// <summary> /// 根據條件刪除 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="whereProc">刪除的條件</param> /// <returns>結果</returns> public bool DeleteEntityByWhere<T>(Expression<Func<T, bool>> whereProc) where T : class { try { using (TDbContext ef = new TDbContext()) { List<T> list = ef.Set<T>().Where(whereProc).ToList(); if (list == null || list.Count == 0) { return true; } list.ForEach(R => { ef.Set<T>().Remove(R); }); return ef.SaveChanges() > 0; } } catch (Exception) { return false; } } /// <summary> /// 刪除單個實體 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="t">待刪除的實體</param> /// <returns>結果</returns> public bool DeleteEntity<T>(T t) where T : class { try { using (TDbContext ef = new TDbContext()) { ef.Set<T>().Attach(t); ef.Set<T>().Remove(t); //var entity = ef.Entry<T>(t); //entity.State = System.Data.EntityState.Deleted; return ef.SaveChanges() > 0; } } catch (Exception) { return false; } } /// <summary> /// 刪除多個 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="tlist">待刪除的集合</param> /// <returns>結果</returns> public bool DelEntity<T>(List<T> tlist) where T : class { try { using (TDbContext ef = new TDbContext()) { if (tlist.Count == 0) { return true; } foreach (var item in tlist) { ef.Set<T>().Attach(item); ef.Set<T>().Remove(item); } return ef.SaveChanges() > 0; } } catch (Exception) { return false; } } /// <summary> /// 根據條件刪除許可權 /// </summary> /// <typeparam name="T">泛型實體型別 在呼叫前必須制定 且只能為引用型別</typeparam> /// <param name="whereProc">刪除的條件</param> /// <returns>結果</returns> public bool DeleteClass<T>(Expression<Func<T, bool>> whereProc) where T : class { try { using (TDbContext ef = new TDbContext()) { List<T> list = ef.Set<T>().Where(whereProc).ToList(); if (list == null || list.Count == 0) { return true; } list.ForEach(R => { ef.Set<T>().Remove(R); }); return ef.SaveChanges() > 0; } } catch (Exception) { return false; } } /// <summary> /// 修改 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="t"></param> /// <returns></returns> public bool UpdateEntity<T>(T t) where T : class { try { using (TDbContext ef = new TDbContext()) { if (ef.Entry<T>(t).State == System.Data.Entity.EntityState.Detached) { ef.Set<T>().Attach(t); ef.Entry<T>(t).State = System.Data.Entity.EntityState.Modified; } return ef.SaveChanges() > 0; } } catch (Exception ex) { string error = ex.Message; return false; } } /// <summary> /// 新增實體 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="t"></param> /// <returns></returns> public bool AddEntity<T>(T t) where T : class { try { using (TDbContext ef = new TDbContext()) { ef.Set<T>().Add(t); return ef.SaveChanges() > 0; } } catch (Exception ex) { Console.WriteLine(ex.Message); return false; } } /// <summary> /// 根據sql查詢資料 （可以使自定義實體） /// </summary> /// <typeparam name="TModel">實體型別</typeparam> /// <param name="sql">sql語句</param> /// <returns>失敗或者沒有資料 返回 空集合 否則返回 查詢的到結果集</returns> public List<TModel> GetDataBySql<TModel>(string sql) where TModel : class { try { using (TDbContext db = new TDbContext()) { return db.Database.SqlQuery<TModel>(sql).ToList(); } } catch (Exception exp) { Console.WriteLine(exp.Message); return new List<TModel>(); } } /// <summary> /// 執行sql 增加 刪除 修改 /// </summary> /// <param name="sql">增加 刪除 修改 sql</param> /// <returns>true 成功 false 失敗</returns> public bool ExcuteSql(string sql) { try { using (TDbContext db = new TDbContext()) { return db.Database.ExecuteSqlCommand(sql) > 0; } } catch (Exception ex) { Console.WriteLine(ex.Message); return false; } } /// <summary> /// 新增一組資料 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="tlist"></param> /// <returns></returns> public bool AddClass<T>(List<T> tlist) where T : class { try { using (TDbContext ef = new TDbContext()) { if (tlist.Count == 0) { return true; } foreach (var item in tlist) { ef.Set<T>().Add(item); } return ef.SaveChanges() > 0; } } catch (Exception ex) { Console.WriteLine(ex.Message); return false; } } /// <summary> /// 獲取分頁資料（不需要條件） /// </summary> /// <typeparam name="T">實體型別</typeparam> /// <typeparam name="TN">實體的成員屬性的型別</typeparam> /// <param name="pageIndex">當前請求的頁面</param> /// <param name="pageCount">每頁的行數</param> /// <param name="orderByProc">排序的表示式</param> /// <returns></returns> public List<T> GetPageEntity<T, TN>(int pageIndex, int pageCount, Expression<Func<T, TN>> orderByProc, Expression<Func<T, bool>> whereExp) where T : class { try { using (TDbContext ef = new TDbContext()) { if (whereExp == null) { return ef.Set<T>().OrderBy(orderByProc).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList(); } return ef.Set<T>().OrderBy(orderByProc).Skip((pageIndex - 1) * pageCount).Take(pageCount).Where(whereExp).ToList(); } } catch (Exception ex) { Console.WriteLine(ex.Message); return null; } } } }
記錄自己用過的東西 以免遺忘!