C#

Eder Sa wrote:

<layer>I need to load all the data, because

I are Troll

SQLiteConnection cnn = openCon();
string SQL = "select cod, desc from produtcs";
SQLiteDataReader sDR;
List<MyObj> data = new List<MyObj>();
cnn.Open();

// execution time: 1 second (emulator)
// execution time: 1~2 second (device)
SQLiteCommand sCommand = new SQLiteCommand(SQL, cnn);
sDR = sCommand.ExecuteReader();

// execution time: 5~6 seconds (emulator)
// execution time: 18~20 seconds (device)
// alternative test: 1 seconds (emulator)
// alternative test: 6 seconds (device)
while (sDR.Read())
{
    data.Add(new MyObj(Convert.ToInt32(sDR["cod"].ToString()), sDR["desc"].ToString()));
    // Alternative test inserting null objects
    // data.Add(new MyObj());
}
 
// execution time: 6 seconds (emulator)
// execution time: 18 seconds (device)
// same times with alternative data
listBox1.DataSource = data;

// with GRID VIEW
// execution time: 0 seconds (emulator)
// execution time: 0 seconds (device)
dataGrid1.DataSource = data;

Honeyboy_20 wrote:

I have problem when I am try to send byte to serial port.
for example
int x=153;
when i get the hexa decimal of 153 it's 99
but when I am try to send it , it appear as 3F but I want it to be 99 as hexa decimal

Honeyboy_20 wrote:

I have problem when I am try to send byte to serial port.

Honeyboy_20 wrote:

int x=153;

Honeyboy_20 wrote:

when i get the hexa decimal of 153 it's 99

Honeyboy_20 wrote:

but when I am try to send it , it appear as 3F

153 = 0x99
 99 = 0x63
 63 = 0x3F

Bernhard Hiller wrote:

But there are no signed bytes in .NET...

int num = 153;
string hex = num.ToString("X2");//99
//byte send = byte.Parse(hex);//0x63 wrong!
byte send = byte.Parse(hex , System.Globalization.NumberStyles.AllowHexSpecifier); //0x99,Better to use TryParse.

//May be you are wrong twice，so 153 => "99" => 0x63 => "63" => 0x3F