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:

• Stored Procedure
• INSERT statement
• UPDATE statement
• DELETE statement

Parameters

The following table shows the different parameters of an Execute method.

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