C# Discussion Boards - CodeProject

Tris Setiawan31-Jul-09 19:46

31-Jul-09 19:46

hi all, can anyone guide me or has links about how to read data from existing tcp connection?
let's say i have application X which operates on tcp protocol on port 12000,
how can i create a .Net application to get the data that passes through port 12000? (the data that application X receives)

i hope my question is clear. any help is much appreaciated

thank you.

Re: read data from existing tcp connection

stancrm31-Jul-09 19:56

stancrm

31-Jul-09 19:56

you must use packet capture to get the data from another process. See this:

SharpPcap - A packet capture framework for .NET[^]

Re: read data from existing tcp connection

Tris Setiawan31-Jul-09 20:25

Tris Setiawan

31-Jul-09 20:25

thanks for your fast reply stancrm, it seems the answer i have been looking for. Thumbs Up | :thumbsup:

using tab control

gal00031-Jul-09 6:59

gal000

31-Jul-09 6:59

Hi,
I've creared a form with tabcontrol,
in one tab i put a richtextbox.

how can i access the richtextbox and edit a text in it?

Thanks

Re: using tab control

Xmen Real 31-Jul-09 7:04

Xmen Real

31-Jul-09 7:04

richTextBox1.Text="I got you";

you can access any control in form or any container control(if subcontrol is added by current form) by using its Name property. If Name is "richTextBox1" then just write
richTextBox1 and rest depends on you...

TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKQUFK[M`UKs*$GwU#QDXBER@CBN%
R0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>

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Re: using tab control

gal00031-Jul-09 18:45

gal000

31-Jul-09 18:45

Xmen W.K. wrote:
you can access any control in form or any container control(if subcontrol is added by current form) by using its Name property. If Name is "richTextBox1" then just write
richTextBox1 and rest depends on you...

WOW thanks,
i thougth i need to access tought the tab.

Re: using tab control

Baeltazor31-Jul-09 7:32

Baeltazor

31-Jul-09 7:32

Hi,

If the Rich Text Box is the first control inside the tabpage, then there are two ways you can acheive this:

Directly access the RTB:

tabControl1.SelectedTab.Controls[0].Text = "I have just accessed my Rich Text Box and put text in it";

OR:

RichTextBox rtb = tabControl1.SelectedTab.Controls[0] as RichTextBox;
rtb.Text = "I have just accessed my Rich Text Box and put text in it";

I'll explain the above code a little:

First, we access the tabControl, and say, "we need to look inside the Selected Tab", then we say goto Control[0] (0 being the very first control inside the selected tabpage). Then we use .Text to access the Text property of the RichTextBox control and write something in it.

Note: If the RichTextBox control is NOT the first control inside your TabPage, then you will need to replace the number [0] with the appropriate number. I.e. If the RTB is the second control in your tabpage then replace [0] with [1].

I hope this has helped.

Regards,
Jason Pezzimenti.

If you liked the answer that I have provided, then please click the 'Good Answer' link on the bottom-right of this post. Thank you.

Re: using tab control

Luc Pattyn31-Jul-09 18:28

Luc Pattyn

31-Jul-09 18:28

Why on earth would one use an array index to refer to a Control of which one has a perfectly good reference variable anyway?

This is a terrible suggestion, it weakens the robustness of the code as it introduces an unnecessary constant, that obfuscates the real intent and might accidentally change when the app gets modified and controls get added or removed.

Dead | X|

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

TextBox disabling Middle-Scroll.

Baeltazor31-Jul-09 6:58

Baeltazor

31-Jul-09 6:58

Hey there

I'm experiencing a little problem over here... In NotePad, when the scrollbars are visible I can use my middle mouse button to scroll horizontally or vertically, but when I create my own Text Editor in C#, this does not work. I can see for a split second the circular scroller thing appear but then it dissappears right away. Does anybody know a way to fix this?

Re: TextBox disabling Middle-Scroll.

Xmen Real 31-Jul-09 7:01

Xmen Real

31-Jul-09 7:01

make sure textbox has focus as well as middle mouse is not pressed

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Re: TextBox disabling Middle-Scroll.

Baeltazor31-Jul-09 7:07

Baeltazor

31-Jul-09 7:07

Thank you for your reply. I think I understand what you meant. I just went and made a change. I added textBox1.Focus(); to the code when I create the TextBox. but it still doesn't work. Do you know what causes this problem?

Regards,
Jason Pezzimenti.

If you liked the answer that I have provided, then please click the 'Good Answer' link on the bottom-right of this post. Thank you.

Re: TextBox disabling Middle-Scroll.

Xmen Real 31-Jul-09 7:09

Xmen Real

31-Jul-09 7:09

use RichTextBox instead

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Re: TextBox disabling Middle-Scroll.

Baeltazor31-Jul-09 7:10

Baeltazor

31-Jul-09 7:10

Ah, the good ol' RTB... My Arch Nemesis. The thing that would never save as PlainText. lol Thanks Smile | :)

Regards,
Jason Pezzimenti.

If you liked the answer that I have provided, then please click the 'Good Answer' link on the bottom-right of this post. Thank you.

Re: TextBox disabling Middle-Scroll.

Xmen Real 31-Jul-09 7:16

Xmen Real

31-Jul-09 7:16

well, If I need to have large text with scrolling then textbox will be that the last thing I would think of.

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Re: TextBox disabling Middle-Scroll.

Baeltazor31-Jul-09 7:21

Baeltazor

31-Jul-09 7:21

Yeah, that's understandable. Thanks for your help Xmen W.K. Smile | :)

I'll go and whip out my good old RTB and see what I can do Big Grin | :-D

YDreams ImageMapDemo 2.0 Code Behind Issue

dmgroup198431-Jul-09 6:47

dmgroup1984

31-Jul-09 6:47

Hello

I have an ImageMap created using YDreams ImageMapDemo 2.0. I'm using this control for the rollover image effect with circle and polygons hotspots. My issue is I can't seem to figure out how to write the correct C# code for each hotspot. I am able to get one hotspot to have the rollover effect but not the other 4. Can someone please help me out with the code behind. I am very very new with C+. Anyone's help would be much appreciated. Been banging my head for 2 months.

Thanks in advanced

Dale

Form code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<%@ Register Assembly="YDreams.Web.UI.WebControls" Namespace="YDreams.Web.UI.WebControls"
    TagPrefix="ydreams" %>
    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
    
      function pageLoad() {
      }
    
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
    </div>
    <div>
        <ydreams:ImageMap ID="ImageMap1" ImageUrl="methodology_circle_green.gif" OnClick="ImageMap1_Click" runat="server">
            <ydreams:CircleHotSpot CenterX="210" CenterY="45" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AssessCircle" />
            <ydreams:CircleHotSpot CenterX="310" CenterY="120" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AnalyzeCircle" />
            <ydreams:CircleHotSpot CenterX="270" CenterY="240" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="ArchitectCircle" />
            <ydreams:CircleHotSpot CenterX="145" CenterY="240" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AssembleCircle" />
            <ydreams:CircleHotSpot CenterX="103" CenterY="120" Description="Click to test post back..."
                HotSpotMode="Navigate" Radius="41" ToolTip="Post back" Id="AssimilateCircle" />
        </ydreams:ImageMap>
        <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    </div>
    </form>
</body>
</html>

Code Behind

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        YDreams.Web.UI.WebControls.HotSpot AssessCircle = new YDreams.Web.UI.WebControls.CircleHotSpot(210, 45, 41);
        {
            ImageMap1.HotSpots.Add(AssessCircle);
            {
                // add OnMouseOver and OnMouseOut event handlers to the blue polygon hot spot
                YDreams.Web.UI.WebControls.CircleHotSpot circleHotSpot = (YDreams.Web.UI.WebControls.CircleHotSpot)this.ImageMap1.HotSpots["AssessCircle"];
                if (circleHotSpot != null)
                {
                    circleHotSpot.Attributes.Add("onMouseOver", "javascript:DisplayImage(image2);");
                    circleHotSpot.Attributes.Add("onMouseOut", "javascript:DisplayImage(image1);");
                }

                // add the script called by the event handlers
                string script = @"
                    var image1 = new Image(413, 285);
                    image1.src = 'methodology_circle_green.gif';
                    var image2 = new Image(413, 285);
                    image2.src = 'methodology_circle_blue_assess.gif';

                    function DisplayImage(image) {
	                    var theImage = document.images['ImageMap1'];
	                    if (!theImage) {
	                        theImage = document.getElementById('ImageMap1');	
	                    }
                        theImage.src = image.src;
                        return true;
                    }
                ";

                this.ClientScript.RegisterClientScriptBlock(this.GetType(), "DisplayImage", script, true);
            }
        }
        
        YDreams.Web.UI.WebControls.HotSpot AnalyzeCircle = new YDreams.Web.UI.WebControls.CircleHotSpot(310, 120, 41);
        {
            ImageMap1.HotSpots.Add(AnalyzeCircle);
            {
                // add OnMouseOver and OnMouseOut event handlers to the blue polygon hot spot
                YDreams.Web.UI.WebControls.CircleHotSpot circleHotSpot = (YDreams.Web.UI.WebControls.CircleHotSpot)this.ImageMap1.HotSpots["AnalyzeCircle"];
                if (circleHotSpot != null)
                {
                    circleHotSpot.Attributes.Add("onMouseOver", "javascript:DisplayImage(image2);");
                    circleHotSpot.Attributes.Add("onMouseOut", "javascript:DisplayImage(image1);");
                }

                // add the script called by the event handlers
                string script = @"
                    var image1 = new Image(413, 285);
                    image1.src = 'methodology_circle_green.gif';
                    var image2 = new Image(413, 285);
                    image2.src = 'methodology_circle_blue_analyze.gif';

                    function DisplayImage(image) {
	                    var theImage = document.images['ImageMap1'];
	                    if (!theImage) {
	                        theImage = document.getElementById('ImageMap1');	
	                    }
                        theImage.src = image.src;
                        return true;
                    }
                ";

                this.ClientScript.RegisterClientScriptBlock(this.GetType(), "DisplayImage", script, true);
            }
        }
    }
    protected void ImageMap1_Click(object sender, YDreams.Web.UI.WebControls.ImageMapClickEventArgs args)
    {
        YDreams.Web.UI.WebControls.HotSpot hotSpot = args.HotSpot;
        int x = args.X;
        int y = args.Y;

        // set the text of the label
        this.Label1.Text = string.Format("Clicked on hot spot \"{0}\" at image coordinates ({1}, {2})", hotSpot.Id, x, y);
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        this.Label1.Text = string.Empty;
    }

}

Re: YDreams ImageMapDemo 2.0 Code Behind Issue

Henry Minute31-Jul-09 9:28

Henry Minute

31-Jul-09 9:28

It would seem to me that you should be asking this, or at least you stand a better chance of an answer, if you had asked it in the Web Development or ASP Forums

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: YDreams ImageMapDemo 2.0 Code Behind Issue

dmgroup198431-Jul-09 11:38

dmgroup1984

31-Jul-09 11:38

Will do. Thanks

Changing the text colour (foreColor) of a DateTimePicker?

MWRivera31-Jul-09 6:44

MWRivera

31-Jul-09 6:44

Hi All,

I've been able to change the colour of a dateTimePicker inherited field by overriding the backColor method and looking for the WM_ERASEBKGND message in wncProc.
I also want to change the font colour of the dateTimePicker. I thought I could do this by overriding the foreColor method similar to how I did for the backColor. I can't find the message/hex bumber to look for within wncProc.

Is there any such message for ForeColor? Any help/ideas on this would be great.

Thanks,
Mel

Re: Changing the text colour (foreColor) of a DateTimePicker?

Ruben Herman27-Aug-10 23:24

Ruben Herman

27-Aug-10 23:24

I've got the same problem. Does anyone knows how to change the forecolor?

Changing the colour of the inside of a checkbox?

MWRivera31-Jul-09 6:34

MWRivera

31-Jul-09 6:34

Hi All,

I have disabled a checkbox however when it's disabled I don't want it to be grayed out I want it to have it's enabled appearance. So instead of gray I whan it to be white.

Unlike TextBoxes when I use the following code the surrounding area of the checkbox and it's text change colour instead of the inside of the checkbox:

oCheckBox.BackColor = Color.White;

Does anyone know how I would go about doing this?

Thanks,
Mel

Re: Changing the colour of the inside of a checkbox?

Xmen Real 31-Jul-09 6:53

Xmen Real

31-Jul-09 6:53

I dont think its possible unless you draw your own image on it but thats not good way. However, you can make your own CB using a Button and a Label. Change button background image or color on MouseEnter, MouseLeave, MouseDown and MouseUp.

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Re: Changing the colour of the inside of a checkbox?

MWRivera31-Jul-09 8:04

MWRivera

31-Jul-09 8:04

Hi xman

thanks for the idea. Are you suggesting that I make the button appear to look like a checkbox and go from there?

Thanks,
Mel

Re: Changing the colour of the inside of a checkbox?

Xmen Real 31-Jul-09 8:21

Xmen Real

31-Jul-09 8:21

yupp, search for checkbox images or just capture 'em from screen...

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Re: Changing the colour of the inside of a checkbox?

MWRivera31-Jul-09 8:23

MWRivera

31-Jul-09 8:23

Ok, thanks for the idea.

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