Dapper Tutorial Dapper - Execute
Description
Execute is an extension method that can be called from any object of type IDbConnection. It can execute a command one or multiple times and return the number of affected rows. This method is usually used to execute:
Parameters
The following table shows the different parameters of an Execute method.
| Name | Description |
|---|---|
| sql | The command text to execute. |
| param | The command parameters (default = null). |
| transaction | The transaction to use (default = null). |
| commandTimeout | The command timeout (default = null) |
| commandType | The command type (default = null) |
Example - Execute Stored Procedure
Single
Execute the Stored Procedure a single time.
string sql = "Invoice_Insert"; using (var connection = My.ConnectionFactory()) { var affectedRows = connection.Execute(sql, new {Kind = InvoiceKind.WebInvoice, Code = "Single_Insert_1"}, commandType: CommandType.StoredProcedure); My.Result.Show(affectedRows); }
Many
Execute the Stored Procedure multiple times. Once for every object in the array list.
string sql = "Invoice_Insert"; using (var connection = My.ConnectionFactory()) { var affectedRows = connection.Execute(sql, new[] { new {Kind = InvoiceKind.WebInvoice, Code = "Many_Insert_1"}, new {Kind = InvoiceKind.WebInvoice, Code = "Many_Insert_2"}, new {Kind = InvoiceKind.StoreInvoice, Code = "Many_Insert_3"} }, commandType: CommandType.StoredProcedure ); My.Result.Show(affectedRows); }
Example - Execute INSERT
Single
Execute the INSERT Statement a single time.
string sql = "INSERT INTO Customers (CustomerName) Values (@CustomerName);"; using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServerW3Schools())) { var affectedRows = connection.Execute(sql, new {CustomerName = "Mark"}); Console.WriteLine(affectedRows); var customer = connection.Query<Customer>("Select * FROM CUSTOMERS WHERE CustomerName = 'Mark'").ToList(); FiddleHelper.WriteTable(customer); }
Try it: .NET Core | .NET Framework
Many
Execute the INSERT Statement multiple times. Once for every object in the array list.
string sql = "INSERT INTO Customers (CustomerName) Values (@CustomerName);"; using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServerW3Schools())) { connection.Open(); var affectedRows = connection.Execute(sql, new[] { new {CustomerName = "John"}, new {CustomerName = "Andy"}, new {CustomerName = "Allan"} } ); Console.WriteLine(affectedRows);
Try it: .NET Core | .NET Framework
Example - Execute UPDATE
Single
Execute the UPDATE Statement a single time.
string sql = "UPDATE Categories SET Description = @Description WHERE CategoryID = @CategoryID;"; using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServerW3Schools())) { var affectedRows = connection.Execute(sql,new {CategoryID = 1, Description = "Soft drinks, coffees, teas, beers, mixed drinks, and ales"}); Console.WriteLine(affectedRows); }
Try it: .NET Core | .NET Framework
Many
Execute the UPDATE Statement multiple times. Once for every object in the array list.
string sql = "UPDATE Categories SET Description = @Description WHERE CategoryID = @CategoryID;"; using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServerW3Schools())) { var affectedRows = connection.Execute(sql, new[] { new {CategoryID = 1, Description = "Soft drinks, coffees, teas, beers, mixed drinks, and ales"}, new {CategoryID = 4, Description = "Cheeses and butters etc."} } ); Console.WriteLine(affectedRows);
Try it: .NET Core | .NET Framework
Example - Execute DELETE
Single
Execute the DELETE Statement a single time.
string sql = "DELETE FROM Customers WHERE CustomerID = @CustomerID"; using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServerW3Schools())) { var affectedRows = connection.Execute(sql, new {CustomerID = 1}); Console.WriteLine(affectedRows); }
Try it: .NET Core | .NET Framework
Many
Execute the DELETE Statement multiple times. Once for every object in the array list.
string sql = "DELETE FROM OrderDetails WHERE OrderDetailID = @OrderDetailID"; using (var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServerW3Schools())) { var affectedRows = connection.Execute(sql, new[] { new {OrderDetailID = 1}, new {OrderDetailID = 2}, new {OrderDetailID = 3} } ); Console.WriteLine(affectedRows);
Try it: .NET Core | .NET Framework