C# Discussion Boards - CodeProject

Re: create a loadable dll from vs 2005 environment (instead of by using csc)

Saqib Mehmood30-Jul-06 23:51

Saqib Mehmood

30-Jul-06 23:51

You should use ClassLibrary type project to create dll in VS.

Saqib

Sending Image to C++

liqnit30-Jul-06 21:08

liqnit

30-Jul-06 21:08

Hi is there a way i can send or give access\reference to Buffer i have with BMP image inside to another
object application written in C++ unmaneged?

using System;<br />
using System.Collections.Generic;<br />
using System.ComponentModel;<br />
using System.Data;<br />
using System.Drawing;<br />
using System.Text;<br />
using System.Windows.Forms;<br />
<br />
<br />
namespace LoadImageBMP<br />
{<br />
    public partial class Form1 : Form<br />
    {<br />
        public Form1()<br />
        {<br />
            InitializeComponent();<br />
        }<br />
<br />
<br />
<br />
        private void button1_Click(object sender, EventArgs e)<br />
        {<br />
 <br />
            mLoadImagetoBuffer();<br />
            pb1.Image = System.Drawing.Image.FromFile(@"M:\Inbox\Card.bmp");<br />
           <br />
            <br />
        }<br />
        private  void mLoadImagetoBuffer()<br />
        {<br />
            //(@"M:\Inbox\Card.bmp");<br />
            <br />
            Image Mbmp;<br />
            Mbmp = System.Drawing.Image.FromFile(@"M:\Inbox\Card.bmp");<br />
<br />
        }<br />
    }<br />
    }<br />

i want to semd give acess to Mbmp.

any idea would help.

Have a nice Day

Re: Sending Image to C++

stancrm30-Jul-06 23:08

stancrm

30-Jul-06 23:08

I think you must first take a look at how to use managed code in unmanaged world.
http://www.codeproject.com/managedcpp/ijw_unmanaged.asp

Re: Sending Image to C++

liqnit31-Jul-06 2:57

liqnit

31-Jul-06 2:57

thanks i am reading it now

Have a nice Day

IP Address

AnjuV30-Jul-06 20:53

AnjuV

30-Jul-06 20:53

Hai,

How should I get the IP Address of my clients(in ASP.Net,C#)?

Re: IP Address

coolestCoder30-Jul-06 22:16

coolestCoder

30-Jul-06 22:16

Hi AnjuV,
You can use the Request object.

Request.UserHostAddress

By the way you should have posted this query in the ASP .NET message board.

"A good programmer is someone who looks both ways before crossing a one-way street." -- Doug Linder

Anant Y. Kulkarni

Please help with datagrid

k535430-Jul-06 19:13

k5354

30-Jul-06 19:13

I am new to C#, I create a WinApp with FormMain.cs & userControl.cs. userControl add to left panel of FormMain, and dataGrid1 add to right. When I click on btn_search and I get a run time error "Null Reference Exception was unhandled". How can I pass the search result to right side dataGrid1?

thank you

Ken

in userControl.cs
...
void btn_search_Click(object sender, System.EventArgs e)
{
...
ora_Connect(sql);
}
void ora_Connect(string strSql)
{
// Create and open a new connection
m_connection = new OracleConnection("Host=vmtestxp;Port=1521;SID=xe;User ID=abc;Password=abc");
m_connection.Open();

adapter = new OracleDataAdapter(strSql, m_connection);
cb = new OracleCommandBuilder(adapter);
dataSet = new DataSet("DS");
adapter.Fill(dataSet, "TABLE");
_dataGrid1.SetDataBinding(dataSet,"TABLE");

}
private System.Windows.Forms.DataGrid _dataGrid1;

public DataGrid dataGrid1_Temp
{
get
{
return _dataGrid1;
}
set
{
_dataGrid1 = value;
}
}
....
in FormMain.cs
usercontrol dc = new usercontrol();
void frmMain_Load(object sender, System.EventArgs e)
{

dc.dataGrid1_Temp = this.dataGrid1;
}

-- modified at 10:47 Monday 31st July, 2006

copy and paste text

Kim061830-Jul-06 18:57

Kim0618

30-Jul-06 18:57

Hi,

I am programmig an app with a few window forms and users can copy
text from controls(e.g. textBox) from one form to another by highlighting
the text and click the copy menuItem in the mainMenu (not using contextMenu coz there would be no problem by using contextMenu with the control)

The problem is, how can the app know which control the text is copied from when the user clicks the copy menuItem ? Do I need to register a control
highlight or ???? event to each control so the app can know which control is being highlighted with text ? But it seems quite tedious coz there are many textBoxes on each form and may affect the performance coz many event listeners are registerd. Any better solution ?

Thanks

Re: copy and paste text

Saqib Mehmood30-Jul-06 20:41

Saqib Mehmood

30-Jul-06 20:41

Hi, I think in the mainMenu click event you can just check the focus control and then if the focus control is a TextBox then you can get the selected text from it to use in copy operation.

Saqib

Re: copy and paste text

Kim061830-Jul-06 22:29

Kim0618

30-Jul-06 22:29

but if I click the mainMenu, the focus will shift to the mainMenu, then
there is no way to get the textbox ??

Re: copy and paste text

Saqib Mehmood30-Jul-06 23:24

Saqib Mehmood

30-Jul-06 23:24

you can get the focus for TextBox try this code in menu click event.;)

<br />
if (this.textBox1.Focused)<br />
{<br />
   // ....<br />
}<br />
else if (this.textBox2.Focused)<br />
{<br />
  // ....<br />
}<br />

Saqib

Re: copy and paste text

erfi31-Jul-06 22:09

erfi

31-Jul-06 22:09

you can use this code it is working , i tested
when you click the menuItem the textBox focus will not change

private void PastItem_Click(object sender, System.EventArgs e)
{
        if (textBox1.Focused)
	{
               textBox1.Text = str;
	}
	else if (textBox2.Focused)
	{
		textBox2.Text = str;
	}
	else if(textBox3.Focused)
	{
		textBox3.Text = str;
	}
}

private void CopyItem_Click(object sender, System.EventArgs e)
{
	if(textBox1.Focused)
	{
		str = textBox1.SelectedText;
	}
	else if (textBox2.Focused)
	{
		str = textBox2.SelectedText;
	}
	else if(textBox3.Focused)
	{
		str = textBox3.SelectedText;
	}
}

erfan

Re: copy and paste text

LongRange.Shooter31-Jul-06 5:39

LongRange.Shooter

31-Jul-06 5:39

If you want to copy and paste text from one control to another, you use the ClipBoard.

generate numbers

skyeddie30-Jul-06 18:52

skyeddie

30-Jul-06 18:52

hi all its me again , jus another question..anyone who can show me or link me to any source codes that can generate sequence or random numbers.. thanks

Re: generate numbers

Guffa30-Jul-06 18:58

Guffa

30-Jul-06 18:58

Use the Random class.

---
b { font-weight: normal; }

Re: generate numbers

skyeddie30-Jul-06 19:53

skyeddie

30-Jul-06 19:53

i know how u do it? as in the source codes..pardon me as im really learning this C# from scratch and im urgent with this sch proj of mine

Re: generate numbers

Guffa30-Jul-06 20:59

Guffa

30-Jul-06 20:59

Here is an example:

// Create an instance of the random generator
Random rnd = new Random();
// Get a number between 0 and 9
int number = rnd.Next(10);
// Get a number between 0 and 19
int another = rnd.Next(20);

---
b { font-weight: normal; }

Re: generate numbers

LongRange.Shooter31-Jul-06 5:40

LongRange.Shooter

31-Jul-06 5:40

MSDN is the Microsoft Developers Network. It is there for the purpose of providing some of the documentation you need. Just go to MSDN, search for Random, and then look for articles that tell you how to use it.

Re: generate numbers

Vipin Venugopal30-Jul-06 20:09

Vipin Venugopal

30-Jul-06 20:09

Hope this code helps u.

<b>private void button1_Click(object sender, System.EventArgs e)

{

int counter;

counter = 50;

int i;

Random r = new Random();

for(i =0; i<counter; i++)

{

int num = r.Next(1000);

dd1.Items.Add(num.ToString());

}

}</b>

Vipin

Re: generate numbers

skyeddie30-Jul-06 20:22

skyeddie

30-Jul-06 20:22

hi appreciate yr help..however wht is dd1? i get this error when compiling this code..thanks

Re: generate numbers

Vipin Venugopal30-Jul-06 20:31

Vipin Venugopal

30-Jul-06 20:31

i just inserted one dropdownlist to display the generated code.so when u click the button the random no generated will be displayed in the dropdownlist. u can also use. textbox instead of dropdownlist. so that u can make the following change instead of ddl.tems.add(num.ToString());
just give..... textbox1.text=num.ToString();
random numbers will be generated on everyclick

Vipin

Re: generate numbers

skyeddie30-Jul-06 20:37

skyeddie

30-Jul-06 20:37

hi vipin i really appreciate yr help..however i have this error "the type n namespace name cannot be found"..i understand what u mean but as im new in visual studio can u guide me step-by-step as from what i read from the error i think i need to declare something or wht? i really appreciate yr help .. thanks

Re: generate numbers

Vipin Venugopal30-Jul-06 21:04

Vipin Venugopal

30-Jul-06 21:04

just create a new project and place a button and textbox in the form. double click the button and then paste this code. dont change anything else. this will work for sure.

int counter;

counter = 50;

int i;

Random r = new Random();

for(i =0;i<counter;i++)

{

int num = r.Next(1000);

TextBox1.Text=num.ToString();

}

Vipin

Re: generate numbers

skyeddie30-Jul-06 21:19

skyeddie

30-Jul-06 21:19

hi Vipin u r a great help!! i manage to do it..thanks aplenty.. ur the man!! BTW can u teach me how to program sequence numbers instead of random num??

really appreciate yr help thanks!!! Smile | :)

Re: generate numbers

Vipin Venugopal30-Jul-06 22:36

Vipin Venugopal

30-Jul-06 22:36

i didnt get what u ment by sequence no.

Vipin

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