thx a lot for giving me right vector

something like that http://westyle.ru/uploads/posts/2011-07/1310567617_transparent.png[^]

it did not help anyway thx

modified on Sunday, April 18, 2010 5:41 AM

Hello. I wrote a simple select area, but its working slow when form is maximized, who knows some alternative fast methods for this here is my code sry for bad english

public partial class Form1 : Form
{
bool canResize;
int mX, mY;
Rectangle rect = new Rectangle();

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1\_Paint(object sender, PaintEventArgs e)
    {
        e.Graphics.DrawRectangle(new Pen(Brushes.Purple, 2), rect);
    }

    private void Form1\_MouseDown(object sender, MouseEventArgs e)
    {
        canResize = true;
        mX = e.X; mY = e.Y;

        rect.Location = new Point(mX, mY);
    }

    private void Form1\_MouseUp(object sender, MouseEventArgs e)
    {
        canResize = false;
    }

    private void Form1\_MouseMove(object sender, MouseEventArgs e)
    {
        if (canResize)
        {
            if (mX < e.X)
            {
                rect.X = mX;
                rect.Width = e.X - mX;
            }
            else
            {
                rect.X = e.X;
                rect.Width = mX - e.X;
            }
            if (mY < e.Y)
            {
                rect.Y = mY;
                rect.Height = e.Y - mY;
            }
            else
            {
                rect.Y = e.Y;
                rect.Height = mY - e.Y;
            }
            this.Invalidate();
        }
    }
}

ok, very helpful, thx!

at to fast message sending i get 1 incoming message with 10 grouped packets and not 1 packet for each of 10 incoming messages for p.s. sry for terrible english

form1.CreateGraphics() and this is workling in other thread

Thread th = new Thread(delegate() { e.Graphics.DrawEllipse(new Pen(Brushes.Aqua, 10), new Rectangle(20, 20, 20, 20)); //this line throw new exception "Invalid argument" }); th.Start(); help pls

in Apache done that I need, Apache accepting first 300 connections and then he stop accepting new connection before i destroy old connections i.e. it does not accept a new connection, and immediately disconnect, just an exception when i trying to do 301-th connection

or rather I need to limit the maximum number of connections that can make 1 client p.s. sry for my english

Adn can it be done before calling Socket.Accept() ?

yes ok, thx

how to make server which 10 000 clients and more?

subject

"Does the loop run at least once?" - no Ok, thx

System.AccessViolationException was unhandled Message="Attempting to read or write protected memory. This often indicates that other memory is damaged." Source="System.Data" StackTrace: в System.Data.Common.UnsafeNativeMethods.SQLGetData(OdbcStatementHandle StatementHandle, UInt16 ColumnNumber, SQL_C TargetType, CNativeBuffer TargetValue, IntPtr BufferLength, IntPtr& StrLen_or_Ind) в System.Data.Odbc.OdbcStatementHandle.GetData(Int32 index, SQL_C sqlctype, CNativeBuffer buffer, Int32 cb, IntPtr& cbActual) в System.Data.Odbc.OdbcDataReader.GetData(Int32 i, SQL_C sqlctype, Int32 cb, Int32& cbActualOut) в System.Data.Odbc.OdbcDataReader.internalGetString(Int32 i) в System.Data.Odbc.OdbcDataReader.GetValue(Int32 i, TypeMap typemap) в System.Data.Odbc.OdbcDataReader.GetValue(Int32 i) в FMySQLClient.MySQL.FetchArray(OdbcDataReader& reader) в C:\FMySQLClient\FMySQLClient\MySQL.cs:line 199 в FMySQLClient.Form1.button1_Click(Object sender, EventArgs e) в C:\FMySQLClient\FMySQLClient\Form1.cs:line 30 в System.Windows.Forms.Control.OnClick(EventArgs e) в System.Windows.Forms.Button.OnClick(EventArgs e) в System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) в System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) в System.Windows.Forms.Control.WndProc(Message& m) в System.Windows.Forms.ButtonBase.WndProc(Message& m) в System.Windows.Forms.Button.WndProc(Message& m) в System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) в System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) в System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) в System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) в System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) в System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) в System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) в System.Windows.Forms.Application.Run(Form mainForm) в FMySQLClient.Program.Main() в C:\FMySQLClient\FMySQLClient\Program.cs:line 18 в System.AppDomain._nExecuteAssemb

It was a stupid mistake in "for", I mistakenly used instead of - +, thx but i still have AccessViolationException P.S. sry for my English

In the first message, I pointed to a code string with an error

it did not help

public Hashtable FetchArray(ref OdbcDataReader reader)
{
int counter = 0;
int integer = reader.FieldCount;
Hashtable hashtable = new Hashtable();
if (reader.Read())
{
for (int i = 0; i <= integer+1; i++)
{
hashtable.Add(reader.GetName(i), reader.GetValue(i)); // Exception here
}
counter++;
}
return hashtable;
}

Im using MySQL Connector/ODBC 5.1