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Add example basic query functions.

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This commit is contained in:
Kevin Matsubara 2025-04-05 17:23:44 +02:00
parent 61b0e99f94
commit 2ef3859d2a
1 changed files with 37 additions and 6 deletions
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43
EntityFrameworkCore.Console/Program.cs
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@ -14,19 +14,50 @@ var teamFour = await context.Teams.SingleOrDefaultAsync(t => t.TeamId == 3);
// Rather than raise: "System.InvalidOperationException: Sequence contains no elements."
var coach = await context.Coaches.FirstOrDefaultAsync();
// Selection based on finding the Primary Key.
var teamBasedOnId = await context.Teams.FindAsync(5);
if (teamBasedOnId != null)
await GetAllTeamsQuerySyntax("Neo");
async Task GetAllTeamsQuerySyntax(string searchTerm)
{
Console.WriteLine(teamBasedOnId.Name);
var teams = await (
from team in context.Teams
where EF.Functions.Like(team.Name, $"%{searchTerm}%")
select team)
.ToListAsync();
foreach (var team in teams)
{
Console.WriteLine(team.Name);
}
}
void PrintTeams()
async Task PrintTeams()
{
var teams = context.Teams.ToList();
var teams = await context.Teams.ToListAsync();
foreach (var team in teams)
{
Console.WriteLine(team.Name);
}
}
async Task PrintFilteredTeams()
{
Console.WriteLine("Enter search term: ");
var searchTerm = Console.ReadLine();
// var filteredTeams = await context.Teams.Where(t => t.Name.Contains(searchTerm)).ToListAsync();
var filteredTeams = await context.Teams.Where(t => EF.Functions.Like(t.Name, $"%{searchTerm}%")).ToListAsync();
foreach (var team in filteredTeams)
{
Console.WriteLine(team.Name);
}
}
async Task PrintTeamById(int id)
{
// Selection based on finding the Primary Key.
var teamBasedOnId = await context.Teams.FindAsync(id);
if (teamBasedOnId != null)
{
Console.WriteLine(teamBasedOnId.Name);
}
}