public async Task<bool> Exists(IHomeModel model, QueryType queryType)
{
return await Task.Run(async () =>
{
bool exists = true;
string qt = Enum.GetName(typeof(QueryType), queryType);
using (SqlConnection con = new SqlConnection(await GetConnectionString()))
{
con.Open();
using (
SqlCommand command =
new SqlCommand(
string.Format("if (EXISTS (SELECT [Id] FROM [dbo].[Entry] WHERE [{0}] = @{0})) SELECT 'true' ELSE SELECT 'false'", qt),
con))
{
command.Parameters.Add(new SqlParameter()
{
ParameterName = qt,
Value = model.GetType().GetProperty(qt).GetValue(model, null)
});
using (SqlDataReader reader = await command.ExecuteReaderAsync())
{
while (reader.Read())
{
exists = bool.Parse(reader.GetString(0));
}
return exists;
}
}
}
});
}
public async Task DeleteEntry(IHomeModel model, QueryType queryType)
{
await Task.Run(async () =>
{
string qt = Enum.GetName(typeof(QueryType), queryType);
using (SqlConnection con = new SqlConnection(await GetConnectionString()))
{
con.Open();
using (SqlCommand command = new SqlCommand(string.Format("DELETE FROM [dbo].[Entry] WHERE [{0}] = @{0};", qt), con))
{
command.Parameters.Add(new SqlParameter()
{
ParameterName = qt,
Value = model.GetType().GetProperty(qt).GetValue(model, null)
});
await command.ExecuteNonQueryAsync();
}
}
});
}
public async Task<string> GetEntry(IHomeModel model, QueryType queryType)
{
return await Task.Run(async () =>
{
string valueType = Enum.GetName(typeof(QueryType), queryType);
string filterType = GetFilterType(queryType);
using (SqlConnection con = new SqlConnection(await GetConnectionString()))
{
con.Open();
using (SqlCommand command = new SqlCommand(string.Format("SELECT [{0}] FROM [dbo].[Entry] WHERE [{1}] = @{1}", valueType, filterType), con))
{
command.Parameters.Add(new SqlParameter()
{
ParameterName = filterType,
Value = model.GetType().GetProperty(filterType).GetValue(model, null)
});
using (SqlDataReader reader = await command.ExecuteReaderAsync())
{
while (reader.Read())
{
return reader.GetString(0);
}
throw new Exception(string.Format("{0} {1} not found in database.", filterType, valueType));
}
}
}
});
}