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RepoDB

Targeted Operations

This feature allows you to make a targeted invocation when executing the operations against the database. This feature is very useful if you do really care on the performance and efficiency of your execution against the database. The execution will help your application runs in a very efficient manner, as using the targeted operations completely eliminate the high-usage of the network traffic.

Imagine you have a table/entity-model with plenty of columns/properties and you are only querying, inserting, merging or updating into the specific columns.

In this page, let us say the [dbo].[Customer] table and the Customer entity-model has plenty of columns. You will see how the sample code below are targetting certain columns when calling the actual operation.

Querying a Data

Use the Query operation and pass the target fields to query.

using (var connection = new SqlConnection(connectionString))
{
    var fields = Field.Parse<Customer>(e => new
    {
        e.Id,
        e.FirstName,
        e.LastName
    });
    var customer = connection.Query<Customer>(10045,
        fields: fields).FirstOrDefault();
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var fields = Field.From("Id", "FirstName", "LastName");
    var customer = connection.Query("[dbo].[Customer]",
        10045,
        fields: fields).FirstOrDefault();
}

Querying Multiple Data

Use the QueryAll operation and pass the target fields to query.

using (var connection = new SqlConnection(connectionString))
{
    var fields = Field.Parse<Customer>(e => new
    {
        e.Id,
        e.FirstName,
        e.LastName
    });
    var customers = connection.QueryAll<Customer>(fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var fields = Field.From("Id", "FirstName", "LastName");
    var customers = connection.QueryAll("[dbo].[Customer]",
        fields: fields);
}

Inserting a Data

Use the Insert operation and pass the target fields to insert.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        FirstName = "John",
        LastName = "Doe"
    };
    var fields = Field.Parse<Customer>(e => new
    {
        e.FirstName,
        e.LastName
    });
    var id = connection.Insert<Customer, int>(entity,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new
    {
        FirstName = "John",
        LastName = "Doe"
    };
    var id = connection.Insert<int>("[dbo].[Customer]",
        entity);
}

Or via dynamics with fields.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        FirstName = "John",
        LastName = "Doe"
    };
    var fields = Field.From("FirstName", "LastName");
    var id = connection.Insert<int>("[dbo].[Customer]",
        entity, fields: fields);
}

Inserting Multiple Data

Use the InsertAll operation and pass the target fields to insert.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GenerateCustomers();
    var fields = Field.Parse<Customer>(e => new
    {
        e.FirstName,
        e.LastName
    });
    var insertedRows = connection.InsertAll<Customer, int>(entities,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GenerateCustomers();
    var insertedRows = connection.InsertAll("[dbo].[Customer]",
        entities);
}

Or via dynamics with fields.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GenerateCustomers();
    var fields = Field.From("FirstName", "LastName");
    var insertedRows = connection.InsertAll("[dbo].[Customer]",
        entities,
        fields: fields);
}

Merging a Data

Use the Merge operation and pass the target fields to merge.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        Id = 10045,
        FirstName = "John",
        LastName = "Doe",
        LastUpdatedDateUtc = DateTime.UtcNow
    };
    var fields = Field.Parse<Customer>(e => new
    {
        e.Id,
        e.FirstName,
        e.LastName,
        e.LastUpdatedUtc
    });
    var id = connection.Merge<Customer, int>(entity,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        Id = 10045,
        FirstName = "John",
        LastName = "Doe",
        LastUpdatedDateUtc = DateTime.UtcNow
    };
    var id = connection.Merge<int>("[dbo].[Customer]",
        entity);
}

Or via dynamics with fields.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        Id = 10045,
        FirstName = "John",
        LastName = "Doe",
        LastUpdatedDateUtc = DateTime.UtcNow
    };
    var fields = Field.From("Id", "FirstName", "LastName", "LastUpdatedDateUtc");
    var id = connection.Merge<int>("[dbo].[Customer]",
        entity,
        fields: fields);
}

Merging Multiple Data

Use the MergeAll operation and pass the target fields to merge.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GetCustomersWithUpdatedAddress();
    var fields = Field.Parse<Customer>(e => new
    {
        e.Id,
        e.Address
    });
    var mergedRows = connection.MergeAll<Customer>(entities,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GetCustomersWithUpdatedAddress();
    var mergedRows = connection.MergeAll("[dbo].[Customer]",
        entities);
}

Or via dynamics with fields.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GetCustomersWithUpdatedAddress();
    var fields = Field.From("Id", "Address");
    var mergedRows = connection.MergeAll("[dbo].[Customer]",
        entities,
        fields: fields);
}

Updating a Data

Use the Update operation and pass the target fields to update.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        Id = 10045,
        FirstName = "John",
        LastName = "Doe",
        LastUpdatedDateUtc = DateTime.UtcNow
    };
    var fields = Field.Parse<Customer>(e => new
    {
        e.Id,
        e.FirstName,
        e.LastName,
        e.LastUpdatedUtc
    });
    var updatedRows = connection.Update<Customer>(entity,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        Id = 10045,
        FirstName = "John",
        LastName = "Doe",
        LastUpdatedDateUtc = DateTime.UtcNow
    };
    var updatedRows = connection.Update("[dbo].[Customer]",
        entity);
}

Or via dynamics with fields.

using (var connection = new SqlConnection(connectionString))
{
    var entity = new Customer
    {
        Id = 10045,
        FirstName = "John",
        LastName = "Doe",
        LastUpdatedDateUtc = DateTime.UtcNow
    };
    var fields = Field.From("Id", "FirstName", "LastName", "LastUpdatedDateUtc");
    var updatedRows = connection.Update("[dbo].[Customer]",
        entity,
        fields: fields);
}

Updating Multiple Data

Use the UpdateAll operation and pass the target fields to update.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GetCustomersWithUpdatedAddress();
    var fields = Field.Parse<Customer>(e => new
    {
        e.Id,
        e.Address
    });
    var updatedRows = connection.UpdateAll<Customer>(entities,
        fields: fields);
}

Or via dynamics.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GetCustomersWithUpdatedAddress();
    var updatedRows = connection.UpdateAll("[dbo].[Customer]",
        entities);
}

Or via dynamics with fields.

using (var connection = new SqlConnection(connectionString))
{
    var entities = GetCustomersWithUpdatedAddress();
    var fields = Field.From("Id", "Address");
    var updatedRows = connection.UpdateAll("[dbo].[Customer]",
        entities,
        fields: fields);
}