C#访问PostGreSQL数据库的方法

///
/// 根据填写的信息拼数据库连接串
///
/// 数据库连接串
private string getConnectStr()
{
   StringBuilder sb = new StringBuilder();
   string str = string.Empty;
   sb.Append("Server=");
   sb.Append(txtServer.Text);
   sb.Append(";Port=");
   sb.Append(txtPort.Text);
   sb.Append(";User Id=");
   sb.Append(txtUID.Text);
   sb.Append(";Password=");
   sb.Append(txtPassword.Text);
   sb.Append(";Database=");
   sb.Append(txtDB.Text);
   sb.Append(";");
   str = sb.ToString();
   return str;
}

"Server=192.168.1.100;Port=5432;UserId=mike;Password=secret;Database=mikedb;"

///
/// 测试连接PostGreSQL数据库
///
/// Success/Failure
private string TestConnection()
{
   string str = getConnectStr();
   string strMessage = string.Empty;
   try

   {
       NpgsqlConnection conn = new NpgsqlConnection(str);
       conn.Open();
       strMessage = "Success";
       conn.Close();
   }
   catch
   {
       strMessage = "Failure";
   }
   return strMessage;
}

///
/// 测试获取数据（使用要加try、catch）
///
private void TestGetData()
{
   IDbConnection dbcon;
   dbcon = newNpgsqlConnection(getConnectStr());
   dbcon.Open();
   IDbCommand dbcmd = dbcon.CreateCommand();
   dbcmd.CommandText = " SELECT * FROM ContainerObj.TableObj limit 5";
   IDataReader dr = dbcmd.ExecuteReader();
   string strResult = string.Empty;
   while (dr.Read())
   {
       stringstrRecord_Time_Int = dr[0].ToString();
       stringstrIP = dr[1].ToString();
       stringstrFullPath = dr[2].ToString();
       stringstrUpload_Size = dr[3].ToString();
       stringstrDownLoad_Size = dr[4].ToString();
       strResult += "record_time_int: " + strRecord_Time_Int+ " | ip:" + strIP + " | fullpath:" +strFullPath + " | upload_size:" +strUpload_Size + " | download_size:"+ strDownLoad_Size + "\n";
   }
   dr.Close();
    dr = null;
   lblRes.Text = strResult;
}