parameters.Add(kvp.Key, kvp.Value); } } if (subDynamic.templates != null) { templates = templates ?? new List<object>(); foreach (var t in subDynamic.templates) { templates.Add(t); } } } } } /// <summary> /// Ad
Dynamic: Useful for when you need to create a dynamic list of parameters, or when you need to dynamically change the value of a parameter. List: This allows you to specify multiple parameters on an IN clause by using a list. String: Useful when working with SQL Server stored procedures th...
当我从模板对象创建DynamicParamters时,我正在努力解决如何使用Dapper正确地将输出参数映射回对象。无论我如何尝试,我都无法从存储过程中获得要返回的参数。调用parameters.Get<int>("@Id")会抛出KeyNotFoundException。parameters.Get<int?我的SQL是一个非常基本的插入存储过程ALTER PROCEDURE [dbo].[TodoItemIn ...
public static bool Exists(string sql, dynamic parms, string connectionName = null) { using (SqlConnection cnn = GetOpenConnection(connectionName)) { return cnn.Query<int>(sql, (object)parms).Single() > 0 ? true : false; //cnn.Query()返回值为IEnumerable类型 } } 1. 2. 3. 4. 5. P...
as userId,user_name as username,email from tblperson where user_id=@UserId"; int userId = 1; SqlConnection connection = new SqlConnection(connectionString); DynamicParameters parameters = = new DynamicParameters(); parameters.Add("@UserId ", userId); IEnumerable<Person> bayList = connection....
Query(sql, parameters).ToList(); foreach (var item in result) { Console.WriteLine($"User: {item.UserName}, Email: {item.Email}, TotalPurchaseAmount: {item.TotalPurchaseAmount}"); } } 这种对原生 SQL 的直接支持,让开发者可以充分发挥 SQL 的强大功能,而无需受到框架的过多限制 。 (四)与...
The dynamic parameters are passed as the second argument of theExecutemethod. C# Dapper bulk insert We can insert multiple rows withExecute. Program.cs using Dapper; using Npgsql; string cs = @"User ID=postgres;Password=passwd;Host=localhost;Port=5432;Database=testdb"; ...
Parameters can also be built up dynamically using the DynamicParameters class. This allows for building a dynamic SQL statement while still using parameters for safety and performance.var sqlPredicates = new List<string>(); var queryParams = new DynamicParameters(); if (boolExpression) { sql...
parameters是一个DynamicParameters对象,用于传递存储过程的参数。Execute方法执行存储过程插入操作,并将插入的id存储在@Id参数中。最后,通过parameters.Get<int>("@Id")获取插入的id。 需要注意的是,上述代码中的YourStoredProcedureName应替换为实际的存储过程名称。 Dapper的优势在于它的轻量级和高性能。相比于其他...
Parameters can also be built up dynamically using the DynamicParameters class. This allows for building a dynamic SQL statement while still using parameters for safety and performance. var sqlPredicates = new List<string>(); var queryParams = new DynamicParameters(); if (boolExpression) { sqlPredic...