序列图描述了程序的执行顺序,下面是一个实现的序列图: DatabaseUserDatabaseUserExecute query with parametersReturn user dataDisplay user information 6. 总结 通过Dapper实现参数化写法,不仅能有效避免SQL注入攻击,还能简化代码和提高代码可读性。本文中介绍了基本的单条查询及多条查询的实现方式,同时借助状态图和序列...
private static IEnumerable<T>QueryImpl<T>(this IDbConnectioncnn, CommandDefinition command, TypeeffectiveType) { object parameters = command.Parameters; Identity identity = new Identity(command.CommandText, command.CommandType, cnn, effectiveType, parameters?.GetType()); CacheInfo cacheInfo = GetCacheInf...
With this, we can execute multiple SQL statements in one query and read each result set from theGridReaderobject returned by theQueryMultiplemethod. That can help increase the performance of your application in cases where multiple queries need to be executed and their results combined. ...
3.可能是缓存不好的缓存计划,可以执行 DBCC FREEPROCCACHE 清除。 4.在这篇文章http://stackoverflow.com/questions/10933366/sp-executesql-is-slow-with-parameters中并且也用的是Dapper,解决方式是加了 WITH RECOMPILE 语句 parameter-sniffing Query runs fast, but runs slow in stored procedure SQL Server: Q...
{ string sql = "select " + criteria.Fields + " from " + criteria.TableName + " where 1=1 " + criteria.Condition; var result = connection.Query<T>(sql, Parameters).ToList(); return result; } /// /// 获取模型 /// /// <typeparam name="T"></typeparam> /// /// //...
Working_withParameters_In_DApperAPI.zip Introduction In this article, I'm going to explain how we can work with parameters while working with Dapper. In this article, I'll create a table and some procedures with IN, OUT, and Return parameters, and we will fetch values from those ...
{varquery="USP_GETEMPLOYEEDETAILS";result=SqlMapper.Query(conn,query,param:dyParam,commandType:CommandType.StoredProcedure);}}catch(Exception ex){throwex;}returnresult;}publicobjectGetEmployeeList(){object result=null;try{vardyParam=newOracleDynamicParameters();dyParam.Add("EMPCURSOR",OracleDbType....
With Dapper Query Builder the SQL statement and the associated Parameters are kept together, making it easy to append dynamic conditions: var query = cn.QueryBuilder($"SELECT * FROM Product WHERE 1=1"); query += $"AND Name LIKE {productName}"; query += $"AND ProductSubcategoryID = {...
但是它们的重载都不像QueryAsync那样支持Mutli映射，而是粘贴了Dapper代码中的定义：
Dapper.SqlBuilder:可以方便动态构建SQL语句,如Join、SELECT、Where、OrderBy等等; } 对于构建分页语句,分别示例BuildPageQuery和Buil…