Re: Converting Binary to Hex - C# Discussion Boards

Re: Converting Binary to Hex

11-Aug-03 0:26

I have 2 binary numbers, NO. I have 1 binary number...

01010011

Now, how would I convert that to hex? I.E. (53)

convert this bin number...

11111111

into this... (FF)??

/\ |_ E X E GG

Meysam Mahfouzi11-Aug-03 1:16

Meysam Mahfouzi

11-Aug-03 1:16

Convert class may be useful for you. If not, maybe you have to write your own convertor

Don't forget, that's

Persian Gulf

not Arabian gulf!

Re: Converting Binary to Hex

WillemM11-Aug-03 9:02

WillemM

11-Aug-03 9:02

Hex numbers are composed of 4 bits, since 1111 = F so you need to split the bitstring into pieces of 4 bits wide. Then you need to find the decimal value of these bits. Next you look if the value is < 10 if not then you will need to assign a letter A-F to the value and append that to your result. Else you can simply convert the number to text and append that to your result. The problem you will probably ecounter is that the string is not big enough to split into pieces that all are 4 bits wide. You can simply solve that with a check if(bitString.Length % 4 != 0) .... this will indicate that the string is not long enough!

ArrayList strings;<br />
string result = "";<br />
int tempValue;<br />
int counter;<br />
<br />
strings = new ArrayList();<br />
<br />
for(int i = 0; i < bitString.Length; i += 4)<br />
{<br />
  strings.Add(bitString.Substring(i,4));  <br />
}<br />
<br />
<br />
foreach(string bits in strings)<br />
{<br />
  tempValue = 0;<br />
  counter = 1;<br />
<br />
  for(int j = bits.Length-1; j > 0; j--)<br />
  {<br />
    if(bits[j] == '1')<br />
    {<br />
      tempValue += counter;<br />
    }<br />
<br />
    counter *= 2;<br />
  }   <br />
<br />
  if(tempValue < 10)<br />
  {  <br />
    result += tempValue.ToString();<br />
  }<br />
  else<br />
  {<br />
    switch(tempValue)<br />
    {<br />
      case 10:<br />
        result += "A";<br />
        break;<br />
      case 11:<br />
        result += "B";<br />
        break;<br />
      //....<br />
  }<br />
}

I am sorry for you if there are any mistakes in the code above. This code was written in approx. 30 seconds and not tested. Good luck!!

Greetings....

What did I click in the treeview

Nick Seng10-Aug-03 23:58

10-Aug-03 23:58

When I right-click on a node in my treeview, is it possible to find out which node I clicked? The TreeView.SelectedNode wont work because apparently, you need to left click to select a node.

So, any pointers?

God, I pity me! - Phoncible P. Bone

If I end up Windows ME someone is going to be hurting. - One of the answers to a question for What OS are you

OMalleyW11-Aug-03 1:59

OMalleyW

11-Aug-03 1:59

Hi,
The first thing that you need to do is add an oncontextmenu statement on your treeview control there are 2 ways to do that.

1) Go into Design view and add this statement to the treeview
oncontextmenu="javascript: showMenu(this); return false;"
2) Go into your CS code and add an attribute to use the function below
this.TreeView1.Attributes.Add("oncontextmenu","showMenu(this)");

Now here is some code:
function showMenu(Item)
{

var NodeSelected = document.getElementById(Item.id).getTreeNode(event.treeNodeIndex);
var NodeLevel = new Number(event.treeNodeIndex)
var ParentNode = document.getElementById(Item.id).getTreeNode(event.treeNodeIndex).getParent();
var NodeType = "";
var strTreeNodeIndex = "";

strTreeNodeIndex = new String(NodeSelected.getNodeIndex());
NodeType = new String(NodeSelected.getAttribute("type") );
NodeType = NodeType.toUpperCase();
alert("The Node type is " + NodeType + " The Node text is " + NodeSelected.getAttribute("text") );

}

this should get you started

Heath Stewart11-Aug-03 2:20

Heath Stewart

11-Aug-03 2:20

Um, that'd work for ASP.NET, but he never mentioned that he was using ASP.NET. And, since this is the C# forum and not the ASP.NET forum, you should take that into consideration.

The answer in Windows Forms uses hit tracking. Handle the TreeView.MouseUp event. In the handler, check to see if the right mouse button was clicked (don't worry about lefties - Windows swaps the left and right mouse messages so developers don't have to worry about it) using Control.MouseButtons == MouseButtons.Right. If that condition is true, get the position of the mouse click from the event arguments and get the node that was clicked using TreeView.GetNodeAt after translating the point accordingly since the X and Y coordinates of the click are relative to the form.

Example:

public class MyForm : Form
{
  // Constructor, set up handler, etc.
  private TreeNode activeNode; // Our right-clicked node.
  private void myTreeView_MouseUp(object sender, MouseEventArgs args)
  {
    if (MouseButtons == MouseButtons.Right)
    {
      Point p = new Point(args.X, args.Y);
      p = this.myTreeView.PointToClient(p);
      this.activeNode = myTreeView.GetNodeAt(p); // Either a node or null
    }
  }
}

Then just use the activeNode field for your context menu items' Click handlers or in the context menu's Popup event handler (to enable, disable, or change menu items).

-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----

Nick Seng11-Aug-03 2:28

11-Aug-03 2:28

Thanks, this is exactly what I needed! Smile | :)

God, I pity me! - Phoncible P. Bone

If I end up Windows ME someone is going to be hurting. - One of the answers to a question for What OS are you

Nick Seng11-Aug-03 2:27

11-Aug-03 2:27

Ummm...Thanks for the prompt reply. I probably should've said I was using Windows Form Blush | :O

God, I pity me! - Phoncible P. Bone

If I end up Windows ME someone is going to be hurting. - One of the answers to a question for What OS are you

OMalleyW11-Aug-03 2:44

OMalleyW

11-Aug-03 2:44

My fault sorry, I guess I over looked that one. Oh well, now you know how to do it on the web to Smile | :)

Will

Nick Seng11-Aug-03 2:46

insert statement for ms access

11-Aug-03 2:46

It's no prob. And you never know when I might need it one day Big Grin | :-D

God, I pity me! - Phoncible P. Bone

If I end up Windows ME someone is going to be hurting. - One of the answers to a question for What OS are you

web service????

don7cry10-Aug-03 23:28

don7cry

10-Aug-03 23:28

myLib have some code :

<br />
this.url = "myurl";<br />
userid = "myid";<br />
passwd = "mypwd";<br />
comment = "cat/etc/resolv.conf";<br />
<br />
[System.Web.Services.Protocols.SoapDocumentMethodAttribute<br />
			 ("",RequestNamespace="urn:execute",ResponseNamespace="urn:myLib",Use=<br />
			 System.Web.Services.Description.SoapBindingUse.Encoded, ParameterStyle=<br />
			 System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]<br />
<br />
public string execute(string userid, string passwd, string command)<br />
{<br />
object [] results = this.Invoke("execute",new object[] { userid, passwd, command });<br />
return ((string)(results[0]));<br />
}<br />

and my application has code :

<br />
string result = myLib.execute(userid, passwd, command.Text);<br />

I don't understand [System.Web.Services.Protocols.SoapDocumentMethodAttribute
("",RequestNamespace="urn:execute",ResponseNamespace="urn:myLib",Use=
System.Web.Services.Description.SoapBindingUse.Encoded, ParameterStyle=
System.Web.Services.Protocols.SoapParameterStyle.Wrapped)] does and somebody can explain that , what 'this.Invoke("execute", new object[] {userid, passwd, command));' do???

please help me?? thanks

Re: web service????

Anthony_Yio11-Aug-03 1:59

Anthony_Yio

11-Aug-03 1:59

Is it trying to invoke a web method of a given URL and given namespace?

Sonork 100.41263:Anthony_Yio

zecodela10-Aug-03 23:01

zecodela

10-Aug-03 23:01

hi,
i want to do insert statement in access db. but, i found somethings wrong.
would anyone give a helping hand?
here is the code:

String strCmd = new String(' ', 1024);
strCmd = "insert into profile(id, interval, address) values(1,1, \"tuen moon\")";
OleDbCommand cmd = new OleDbCommand(strCmd, conn);
int result = cmd.ExecuteNonQuery();

there is a exception.
"Syntax error in INSERT INTO statement"

i can't see any syntax error on my sql statement...
anyone can help? is it related to MS Access?

thanks,
jim

Re: insert statement for ms access

Nish Nishant10-Aug-03 23:12

Nish Nishant

10-Aug-03 23:12

I think you need to use ' instead of "

Nish

Extending MFC Applications with the .NET Framework [NW] (My book with Tom)
Summer Love and Some more Cricket [NW] (My first novel)
Shog's review of SLASMC [NW]
Come with me if you want to live

Which button was pressed...

eggie510-Aug-03 21:29

10-Aug-03 21:29

bool switchB=true;
private void button1_Click(object sender, System.EventArgs e)
{

    if(switchB==true)
    {
        <code>//Change the sender button's text</code>
        switchB=false;
    }
    else if(switchB==false)
    {
        //nothing yet...
    }
}

I have a set of 7 buttons, numbered from 0-7, right to left, and all their text set to "0".

now, all of the button's onclicks go to the above method...

As you can see, inside the for loop... Now all I need it to do is this...

Change the text of whatever (of the 8) buttons were clicked.

/\ |_ E X E GG

Meysam Mahfouzi10-Aug-03 22:25

Meysam Mahfouzi

10-Aug-03 22:25

this works:

Button btn = null;
if(switchB==true){
                <code> btn </code>= (Button)<code>sender</code>;
                <code> btn</code>.Text = "<code>Persian Gulf</code>"; 		
	        switchB = false;
		}

Don't forget, that's

Persian Gulf

not Arabian gulf!

eggie511-Aug-03 0:20

11-Aug-03 0:20

Ok, cool. That worked. I didn't know you could declare your own Button, like you can a variable...

I'm confused... whatever... thanks again.

/\ |_ E X E GG

Heath Stewart11-Aug-03 2:48

Heath Stewart

11-Aug-03 2:48

Have you ever programmed before? You can declare a variable of any type you want. This is evident in every programming language. You can use generics or types for variables, fields, properties, function parameters, and whatever you choose.

Some languages like JavaScript/JScript may declare a variable type as var (a generic), but even it has a type - the type of whatever function or object filled it (like var d = new Date(); - d is now of type Date)

Similarily, the same is true in .NET (and Java and MFC). Every class in those frameworks (and some others) derives from Object (or CObject, etc.) If you assign a different type to a generic variable, the type is still that of the type you assigned it:

object o = new Button();

o is actually of type Button, even though it is declared as an Object. You could also declare that variable as a Button, or a Control, or any base class of the Button type. Casting that object doesn't change it - merely gives you access to the methods and properties defined for that class (or inherited by base classes). For example, it wouldn't matter if the variable was declared as a Object or a Button. If you called the ToString method, the method that is called is the one declared on Button because it overrided the method of a base class. This is typically (shall I say, "standard") object-oriented programming (OOP).

I recommend you pick up a good book on .NET programming, or even just OO programming. Looking at a lot of the questions that you've posted, you should also browse around the base class library (BCL) documentation that was installed with the .NET Framework SDK and Visual Studio .NET.

This isn't a slam, but a reminder that research is only half (if not more) of development. Guessing and getting other people to do the work is not going to teach you anything. Browsing around the .NET Framework library will at least familiarize you with what is available so you have some idea of what you could use in a given problem so you don't have to reinvent the wheel. A good book on OO will help you design efficient and effective code.

eggie511-Aug-03 10:31

11-Aug-03 10:31

ok.

/\ |_ E X E GG