/// <summary> /// 条件筛选 例如:expression 为 it=>it.a inValues值为 new list《string》{"a" ,"b"} 生成的SQL就是 a in('a','b') /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression"></param> /// <returns></returns> public static Queryable <T> In <T, FieldType>(this Queryable <T> queryable, Expression <Func <T, object> > expression, List <FieldType> inValues) { ResolveExpress re = new ResolveExpress(); var InFieldName = re.GetExpressionRightField(expression); return(In <T, FieldType>(queryable, InFieldName, inValues)); }
/// <summary> /// 假删除,根据表达示 /// 使用说明:: /// FalseDelete《T》(new int[]{1,2,3})或者Delete《T》(3) /// </summary> /// <param name="field">更新删除状态字段</param> /// <param name="expression">筛选表达示</param> public bool FalseDelete <T>(string field, Expression <Func <T, bool> > expression) { Type type = typeof(T); string typeName = type.Name; typeName = GetTableNameByClassType(typeName); //属性缓存 string cachePropertiesKey = "db." + type.FullName + ".GetProperties"; var cachePropertiesManager = CacheManager <PropertyInfo[]> .GetInstance(); PropertyInfo[] props = null; if (cachePropertiesManager.ContainsKey(cachePropertiesKey)) { props = cachePropertiesManager[cachePropertiesKey]; } else { props = type.GetProperties(); cachePropertiesManager.Add(cachePropertiesKey, props, cachePropertiesManager.Day); } bool isSuccess = false; ResolveExpress re = new ResolveExpress(); re.ResolveExpression(re, expression); string sql = string.Format("UPDATE {0} SET {1}=1 WHERE 1=1 {2}", typeName, field, re.SqlWhere); int deleteRowCount = ExecuteCommand(sql, re.Paras.ToArray()); isSuccess = deleteRowCount > 0; return(isSuccess); }
/// <summary> /// 获取最小值 /// </summary> /// <typeparam name="TResult"></typeparam> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="minField">列</param> /// <returns></returns> public static object Min <T>(this Queryable <T> queryable, Expression <Func <T, object> > expression) { ResolveExpress re = new ResolveExpress(); var minField = re.GetExpressionRightField(expression); return(Min <T, object>(queryable, minField)); }
/// <summary> /// 分组 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression">分组字段 it=>it.fieldName</param> /// <returns></returns> public static Queryable <T> GroupBy <T>(this Queryable <T> queryable, Expression <Func <T, object> > expression) { ResolveExpress re = new ResolveExpress(); var field = re.GetExpressionRightField(expression); var pre = queryable.GroupBy.IsValuable() ? "," : ""; queryable.GroupBy += pre + field; return(queryable); }
/// <summary> /// 排序 /// </summary> /// <typeparam name="T"></typeparam> /// <typeparam name="T2"></typeparam> /// <param name="queryable"></param> /// <param name="expression">例如 (s1,s2)=>s1.id,相当于 order by s1.id</param> /// <param name="type"></param> /// <returns></returns> public static Queryable <T> OrderBy <T, T2>(this Queryable <T> queryable, Expression <Func <T, T2, object> > expression, OrderByType type = OrderByType.asc) { ResolveExpress re = new ResolveExpress(); var field = re.GetExpressionRightFieldByNT(expression); var pre = queryable.OrderBy.IsValuable() ? "," : ""; queryable.OrderBy += pre + field + " " + type.ToString().ToUpper(); return(queryable); }
/// <summary> /// 条件筛选 例如:InFieldName 为 a inValues 值为 new string[]{"a" ,"b"} 生成的SQL就是 a in('a','b') /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression"></param> /// <returns></returns> public static Queryable <T> In <T, FieldType>(this Queryable <T> queryable, string InFieldName, params FieldType[] inValues) { var type = queryable.Type; queryable.WhereIndex = queryable.WhereIndex + 100; ResolveExpress re = new ResolveExpress(queryable.WhereIndex); queryable.Where.Add(string.Format(" AND {0} IN ({1})", InFieldName, inValues.ToJoinSqlInVal())); return(queryable); }
/// <summary> /// 返回序列的唯一元素;如果该序列并非恰好包含一个元素,则会引发异常。 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression"></param> /// <returns></returns> public static bool Any <T>(this Queryable <T> queryable, Expression <Func <T, bool> > expression) { var type = queryable.Type; queryable.WhereIndex = queryable.WhereIndex + 100; ResolveExpress re = new ResolveExpress(queryable.WhereIndex); re.ResolveExpression(re, expression); queryable.Where.Add(re.SqlWhere); queryable.Params.AddRange(re.Paras); return(queryable.Count() > 0); }
/// <summary> /// 返回序列中的第一个元素,如果序列为NULL返回default(T) /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression"></param> /// <returns></returns> public static T FirstOrDefault <T>(this Queryable <T> queryable, Expression <Func <T, bool> > expression) { var type = queryable.Type; queryable.WhereIndex = queryable.WhereIndex + 100; ResolveExpress re = new ResolveExpress(queryable.WhereIndex); re.ResolveExpression(re, expression); queryable.Where.Add(re.SqlWhere); queryable.Params.AddRange(re.Paras); return(FirstOrDefault <T>(queryable)); }
/// <summary> /// 解析表达式 /// </summary> /// <param name="re">当前解析对象</param> /// <param name="exp">要解析的表达式</param> /// <param name="db">数据库访问对象</param> public void ResolveExpression(ResolveExpress re, Expression exp, SqlSugarClient db) { DB = db; //初始化表达式 Init(re, exp); //设置PageSize foreach (var par in Paras) { SqlSugarTool.SetParSize(par); } }
/// <summary> /// 条件筛选 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression"></param> /// <returns></returns> public static Queryable <T> Where <T, T2, T3>(this Queryable <T> queryable, Expression <Func <T, T2, T3, object> > expression) { var type = queryable.Type; queryable.WhereIndex = queryable.WhereIndex + 100; ResolveExpress re = new ResolveExpress(queryable.WhereIndex); re.Type = ResolveExpressType.nT; re.ResolveExpression(re, expression); queryable.Params.AddRange(re.Paras); queryable.Where.Add(re.SqlWhere); return(queryable); }
/// <summary> /// 删除,根据表达示 /// 使用说明: /// Delete《T》(it=>it.id=100) 或者Delete《T》(3) /// </summary> /// <param name="expression">筛选表达示</param> public bool Delete <T>(Expression <Func <T, bool> > expression) { Type type = typeof(T); string typeName = type.Name; typeName = GetTableNameByClassType(typeName); ResolveExpress re = new ResolveExpress(); re.ResolveExpression(re, expression); string sql = string.Format("DELETE FROM {0} WHERE 1=1 {1}", typeName, re.SqlWhere); bool isSuccess = ExecuteCommand(sql, re.Paras.ToArray()) > 0; return(isSuccess); }
/// <summary> /// 初始化表达式 /// </summary> /// <param name="re"></param> /// <param name="exp"></param> private void Init(ResolveExpress re, Expression exp) { ResolveExpress.MemberType type = ResolveExpress.MemberType.None; //解析表达式 this.SqlWhere = string.Format(" AND {0} ", re.CreateSqlElements(exp, ref type, true)); //还原bool值 foreach (var item in ConstantBoolDictionary) { if (this.SqlWhere.IsValuable()) { this.SqlWhere = this.SqlWhere.Replace(item.Key.ToString(), item.ConditionalValue); } } }
/// <summary> /// 条件筛选 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="queryable"></param> /// <param name="expression"></param> /// <returns></returns> public static Queryable <T> Where <T>(this Queryable <T> queryable, Expression <Func <T, bool> > expression) { var type = queryable.Type; queryable.WhereIndex = queryable.WhereIndex + 100; ResolveExpress re = new ResolveExpress(queryable.WhereIndex); if (queryable.JoinTable.IsValuable()) { re.Type = ResolveExpressType.nT; } re.ResolveExpression(re, expression); queryable.Params.AddRange(re.Paras); queryable.Where.Add(re.SqlWhere); return(queryable); }
/// <summary> /// 批量删除 /// </summary> /// <typeparam name="T"></typeparam> /// <typeparam name="FiledType">whereIn里面元素的类型</typeparam> /// <param name="expression">in 的字段名称</param> /// <param name="whereIn">需要删除条件值的数组集合</param> /// <returns></returns> public bool Delete <T, FiledType>(Expression <Func <T, object> > expression, params FiledType[] whereIn) { ResolveExpress re = new ResolveExpress(); var fieldName = re.GetExpressionRightField(expression); Type type = typeof(T); string typeName = type.Name; typeName = GetTableNameByClassType(typeName); //属性缓存 string cachePropertiesKey = "db." + type.FullName + ".GetProperties"; var cachePropertiesManager = CacheManager <PropertyInfo[]> .GetInstance(); PropertyInfo[] props = SqlSugarTool.GetGetPropertiesByCache(type, cachePropertiesKey, cachePropertiesManager); bool isSuccess = false; if (whereIn != null && whereIn.Length > 0) { string sql = string.Format("DELETE FROM {0} WHERE {1} IN ({2})", typeName, fieldName, whereIn.ToJoinSqlInVal()); int deleteRowCount = ExecuteCommand(sql); isSuccess = deleteRowCount > 0; } return(isSuccess); }
/// <summary> /// 联表查询 /// </summary> /// <typeparam name="T">第一个表的对象</typeparam> /// <typeparam name="T2">联接的表对象</typeparam> /// <param name="queryable"></param> /// <param name="expression">表达示</param> /// <param name="type"></param> /// <returns></returns> public static Queryable <T> JoinTable <T, T2, T3>(this Queryable <T> queryable, Expression <Func <T, T2, T3, object> > expression, JoinType type = JoinType.LEFT) { ResolveExpress re = new ResolveExpress(); queryable.WhereIndex = queryable.WhereIndex + 100; re.Type = ResolveExpressType.nT; var exLeftStr = Regex.Match(expression.ToString(), @"\((.+?)\).+").Groups[1].Value; var exLeftArray = exLeftStr.Split(','); var shortName1 = exLeftArray[1]; var shortName2 = exLeftArray[2]; re.ResolveExpression(re, expression); string joinTableName = type.ToString(); string joinStr = string.Format(" {0} JOIN {1} {2} ON {3} ", /*0*/ queryable.JoinTable.Count == 0 ? (" " + shortName1 + " " + joinTableName) : joinTableName.ToString(), /*1*/ typeof(T3).Name, /*2*/ shortName2, /*3*/ re.SqlWhere.Trim().TrimStart('A').TrimStart('N').TrimStart('D') ); queryable.JoinTable.Add(joinStr); queryable.Params.AddRange(re.Paras); return(queryable); }
public void ResolveExpression(ResolveExpress re, Expression exp) { ResolveExpress.MemberType type = ResolveExpress.MemberType.None; var expStr = exp.ToString(); var isNotBool = !expStr.Contains("True") && !expStr.Contains("False"); var isContainsNot = expStr.Contains("Not"); if (isContainsNot && expStr.IsMatch(@" => Not\(.+?\)") && !expStr.Contains("Contains")) { this.SqlWhere = string.Format(" AND {0}=0 or {0} is null ", Regex.Match(expStr, @" => Not\(.+\.(.+?)\)").Groups[1].Value); } else if (isNotBool) { this.SqlWhere = string.Format(" AND {0} ", re.CreateSqlElements(exp, ref type)); } else { var isTrue = Regex.IsMatch(expStr, @"\=\> True$"); var isFalse = Regex.IsMatch(expStr, @"\=\> False$"); if (isFalse) { this.SqlWhere = string.Format(" AND 1<>1 "); } else if (isTrue) { } else { this.SqlWhere = string.Format(" AND {0} ", re.CreateSqlElements(exp, ref type)); } } foreach (var par in Paras) { SqlSugarTool.SetParSize(par); } }
/// <summary> /// 更新 /// 注意:rowObj为T类型将更新该实体的非主键所有列,如果rowObj类型为匿名类将更新指定列 /// 使用说明:sqlSugar.Update《T》(rowObj,whereObj); /// </summary> /// <typeparam name="T"></typeparam> /// <param name="rowObj">new T(){name="张三",sex="男"}或者new {name="张三",sex="男"}</param> /// <param name="expression">it.id=100</param> /// <returns></returns> public bool Update <T>(object rowObj, Expression <Func <T, bool> > expression) where T : class { if (rowObj == null) { throw new ArgumentNullException("SqlSugarClient.Update.rowObj"); } if (expression == null) { throw new ArgumentNullException("SqlSugarClient.Update.expression"); } Type type = typeof(T); string typeName = type.Name; typeName = GetTableNameByClassType(typeName); var rows = SqlSugarTool.GetParameters(rowObj); var isDynamic = rowObj.GetType() != type; var isClass = !isDynamic; //sql语句缓存 string cacheSqlKey = "db.update." + type.FullName + rows.Length; var cacheSqlManager = CacheManager <StringBuilder> .GetInstance(); string pkName = SqlSugarTool.GetPrimaryKeyByTableName(this, typeName); var identityNames = SqlSugarTool.GetIdentitiesKeyByTableName(this, typeName); ResolveExpress re = new ResolveExpress(); re.ResolveExpression(re, expression); StringBuilder sbSql = new StringBuilder(); if (cacheSqlManager.ContainsKey(cacheSqlKey) && isClass) { sbSql = cacheSqlManager[cacheSqlKey]; } else { sbSql = new StringBuilder(string.Format(" UPDATE {0} SET ", typeName)); foreach (var r in rows) { var name = r.ParameterName.TrimStart(':'); var isPk = pkName != null && pkName.ToLower() == name.ToLower(); var isIdentity = identityNames.Any(it => it.Value.ToLower() == name.ToLower()); var isDisableUpdateColumns = DisableUpdateColumns != null && DisableUpdateColumns.Any(it => it.ToLower() == name.ToLower()); if (this.IsIgnoreErrorColumns) { if (!SqlSugarTool.GetColumnsByTableName(this, typeName).Any(it => it.ToLower() == name.ToLower())) { continue; } } if (isPk || isIdentity || isDisableUpdateColumns) { if (isClass) { continue; } } sbSql.Append(string.Format(" {0} =:{0} ,", name)); } sbSql.Remove(sbSql.Length - 1, 1); sbSql.Append(" WHERE 1=1 "); sbSql.Append(re.SqlWhere); cacheSqlManager.Add(cacheSqlKey, sbSql, cacheSqlManager.Day); } List <OracleParameter> parsList = new List <OracleParameter>(); parsList.AddRange(re.Paras); var pars = rows; if (pars != null) { foreach (var par in pars) { SqlSugarTool.SetParSize(par); parsList.Add(par); } } try { var updateRowCount = ExecuteCommand(sbSql.ToString(), parsList.ToArray()); return(updateRowCount > 0); } catch (Exception ex) { throw new Exception("sql:" + sbSql.ToString() + "\n" + ex.Message); } }