I am trying to connect to AWS Redshift from C# and perform a simple query:
public void GetData()
{
NpgsqlConnectionStringBuilder builder = new NpgsqlConnectionStringBuilder();
builder.Host = "myhostname";
builder.Port = 5439;
builder.Database = "mydb";
builder.Username = "myusername";
builder.Password = "mypassword";
builder.ServerCompatibilityMode = ServerCompatibilityMode.Redshift;
using (var conn = new NpgsqlConnection(builder.ConnectionString))
{
conn.Open();
if (conn.State == ConnectionState.Open)
{
using (var cmd = new NpgsqlCommand())
{
cmd.Connection = conn;
cmd.CommandText = "SELECT TOP 10 field FROM example;";
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
Console.WriteLine(reader.GetString(0));
}
}
}
}
}
}
When trying to make the connection I get: Npgsql.PostgresException: 28000: no pg_hba.conf entry for host
. From the same machine I can connect to the cluster using JetBrains DataGrip using the same credentials.
This question is almost the same, but instead of manually creating a connection string, your using the builder. So here is the code for that:
NpgsqlConnectionStringBuilder builder = new NpgsqlConnectionStringBuilder();
builder.TrustServerCertificate = true;
builder.SslMode = SslMode.Required;
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.