Update

This method is used to updates an existing row in the table.

Code Snippets

Below is the sample code to update a row into the [dbo].[Person] table.

using (var connection = new SqlConnection(connectionString))
{
	var person = new Person
	{
		Id = 10045,
		Name = "John Doe",
		Address = "New York",
		DateOfBirth = DateTime.Parse("2020-01-01"),
		IsActive = true,
		DateInsertedUtc = DateTime.UtcNow
	};
	var updatedRows = connection.Update<Person>(person);
}

By default, the primary column is used as a qualifier. You can override it by simply passing the primary key in the what argument.

using (var connection = new SqlConnection(connectionString))
{
	var person = new Person
	{
		Name = "John Doe",
		Address = "New York",
		DateOfBirth = DateTime.Parse("2020-01-01"),
		IsActive = true,
		DateInsertedUtc = DateTime.UtcNow
	};
	/* var updatedRows = connection.Update<Person>(person, what: 10045); // Same as below */
	var updatedRows = connection.Update<Person>(person, 10045);
}

Targeting a Table

You can also target a specific table by passing the literal table like below.

using (var connection = new SqlConnection(connectionString))
{
	var person = new Person
	{
		Id = 10045,
		Name = "John Doe",
		Address = "New York",
		DateOfBirth = DateTime.Parse("2020-01-01"),
		IsActive = true,
		DateInsertedUtc = DateTime.UtcNow
	};
	var updatedRows = connection.Update<Person>("[dbo].[Person]",
		entity: person);
}

Or via Anonymous Type.

using (var connection = new SqlConnection(connectionString))
{
	var person = new
	{
		Id = 10045,
		Name = "John Doe",
		Address = "New York",
		DateOfBirth = DateTime.Parse("2020-01-01"),
		IsActive = true,
		DateInsertedUtc = DateTime.UtcNow
	};
	var updatedRows = connection.Update("[dbo].[Person]",
		entity: person);
}

Or via Dictionary<string, object> or ExpandoObject.

using (var connection = new SqlConnection(connectionString))
{
    var person = new Dictionary<string, object>
    {
        { "Id", 10045 },
        { "Name", "John Doe" },
        { "Address", "New York" },
        { "DateOfBirth", DateTime.Parse("2020-01-01") },
        { "IsActive", true },
        { "CreatedDateUtc", DateTime.UtcNow }
    };
    var id = connection.Update("[dbo].[Customer]",
        entity: person);
}

Specific Columns

You can also target a specific columns to be updated by passing the list of fields to be included in the fields argument.

using (var connection = new SqlConnection(connectionString))
{
	var person = new Person
	{
		Id = 10045,
		Name = "John Doe",
		Address = "New York",
		DateOfBirth = DateTime.Parse("2020-01-01"),
		IsActive = true,
		DateInsertedUtc = DateTime.UtcNow
	};
    var fields = Field.Parse<Person>(e => new
    {
        e.Name,
        e.DateOfBirth,
        e.DateInsertedUtc
    })
	var id = connection.Update<Person>(entity: person,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
	var person = new
	{
		Id = 10045,
		Name = "John Doe",
		Address = "New York",
		DateOfBirth = DateTime.Parse("2020-01-01"),
		IsActive = true,
		DateInsertedUtc = DateTime.UtcNow
	};
	var id = connection.Update("[dbo].[Person]",
		entity: person,
        fields: Field.From("Name", "DateOfBirth", "DateInsertedUtc"));
}

Table Hints

To pass a hint, simply write the table-hints and pass it in the hints argument.

using (var connection = new SqlConnection(connectionString))
{
	var updatedRows = connection.Update<Person>(person,
		hints: "WITH (TABLOCK)");
}

Or, you can use the SqlServerTableHints class.

using (var connection = new SqlConnection(connectionString))
{
	var updatedRows = connection.Update<Person>(person,
		hints: SqlServerTableHints.TabLock);
}