C# Discussion Boards - CodeProject

Re: Arrow keys on form with Tabs with GridViews

dan!sh 5-Jun-09 3:19

5-Jun-09 3:19

How are you managing the tab page change on arrow key press?

You will need to cancel the KeyPress for the GridView and get that code for execution.

जय हिंद

Re: Arrow keys on form with Tabs with GridViews

Nigel Mackay5-Jun-09 3:55

Nigel Mackay

5-Jun-09 3:55

I was hoping that there would be an easier solution!!

In other words I must "grab" the arrow-key-presses and make them do what I want them to do, not the default action.

Thanks.

Re: Arrow keys on form with Tabs with GridViews

dan!sh 5-Jun-09 3:57

dan!sh

5-Jun-09 3:57

Override ProcessCMDKey method. It will let you do that.

जय हिंद

Re: Arrow keys on form with Tabs with GridViews

Nigel Mackay5-Jun-09 4:04

Nigel Mackay

5-Jun-09 4:04

Re: Arrow keys on form with Tabs with GridViews

dan!sh 5-Jun-09 4:06

dan!sh

5-Jun-09 4:06

Nigel Mackay wrote:
Ta

जय हिंद

Re: Arrow keys on form with Tabs with GridViews

Nigel Mackay5-Jun-09 4:14

Nigel Mackay

5-Jun-09 4:14

Thanks

Re: Arrow keys on form with Tabs with GridViews

dan!sh 5-Jun-09 4:15

dan!sh

5-Jun-09 4:15

Oh..not a problem.

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Re: Arrow keys on form with Tabs with GridViews

Henry Minute5-Jun-09 4:43

Henry Minute

5-Jun-09 4:43

Ta = common British expression = "Thank you" Smile | :)

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.”

string declare

michaelgr15-Jun-09 0:35

michaelgr1

5-Jun-09 0:35

Hello,
How can i declare a string in a loop that the name of the variable will be changed for example according the index of the loop. For example if i will do:
for(i=1;i<5;i++)
string k[i]="something";

it will make me 4 string variables:
k1,k2,k3,k4

I mean the name itself will be changed.
I can't use arrays instead.

Re: string declare

Mirko19805-Jun-09 0:43

Mirko1980

5-Jun-09 0:43

You can't, variable names are declared at compile time.
Why you can't use an array?

Re: string declare

michaelgr15-Jun-09 0:45

michaelgr1

5-Jun-09 0:45

because i want to use it as adding columns to a datagridview.
And i need it to be in loop because i take those variables from a regkeys i save before.
Can i save antire array as regkey , then read it from the registry and then add it as column names to the datagridview?

Re: string declare

Manas Bhardwaj5-Jun-09 0:49

Manas Bhardwaj

5-Jun-09 0:49

Use a dictionay instead.

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Re: string declare

Henry Minute5-Jun-09 4:54

Henry Minute

5-Jun-09 4:54

If what you want to do is set the name of the column, or set its headertext then you can do this in the way you first suggested.

string columnBaseName = // Your method for getting regkey goes here
for (int i = 1; i < 3; i++)
{
    DataGridViewTextboxColumn newColumn = new DataGridViewTextboxColumn();
    newColumn.Name = columnNameBase + i.ToString();
    newColumn.HeaderText = columnNameBase + i.ToString();
    // Set any other properties for the column here
    this.dataGridView1.Columns.Add(newColumn);
}

Hope this helps. Smile | :)

Re: string declare

molesworth5-Jun-09 0:48

molesworth

5-Jun-09 0:48

Or a dictionary...

Dictionary<int, string> getString;

for access using the int value, or

Dictionary<string, string> getString;

for access using a name (e.g. "myName"+i.tostring() )

There are three kinds of people in the world - those who can count and those who can't...

Re: string declare

I Believe In GOD5-Jun-09 0:59

I Believe In GOD

5-Jun-09 0:59

there is another ways to do that for example :

System.Collections.ArrayList arr = new System.Collections.ArrayList();
           for (int i = 0; i <= 10; i++)
           {
               arr.Add(i);
           }
           Console.WriteLine(arr[3]);

I know nothing , I know nothing ...

Re: string declare

DaveyM695-Jun-09 1:20

DaveyM69

5-Jun-09 1:20

If it's always the same object type that's being put in the array list and you're using 2.0 or above, then better to use a generic list List<T> where T is the type of the object i.e. List<string>.

ArrayList involves unboxing/boxing which isn't a great idea.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: string declare

I Believe In GOD5-Jun-09 1:34

I Believe In GOD

5-Jun-09 1:34

Noted , Thank you.

I know nothing , I know nothing ...

How to make a network connection at this case?

Majid_grok5-Jun-09 0:04

Majid_grok

5-Jun-09 0:04

Hi there!

I have a client/server program that work properly at the Internet, but with computers that have valid IP. Really I want to make a connection between two computer at the Internet that haven't valid IP, like computers that connect to internet with ISPs, that have a local IP and another IP on Internet (their server IP).
Please see below picture to understand me.
See Here
In the picture, left PC (192.168.20.14) can connect to right ISP (86.110.112.34) easily, but I want to connect to right PC (200.100.114.45). To do this, I think I have to use Port Forwarding technique. Can someone help me please?

Thanks all.

Re: How to make a network connection at this case?

stancrm5-Jun-09 0:37

stancrm

5-Jun-09 0:37

That is the job of router. You must set port forwarding of your router.
For example, just set port TCP:100 to IP 192.168.20.14.

In that case, if you make a connection to 86.110.112.34:100, it will
be forwarded to 192.168.20.14.

Re: How to make a network connection at this case?

Majid_grok5-Jun-09 1:36

Majid_grok

5-Jun-09 1:36

Thanks a lot.
but I think you mean, "if you make a connection to 92.124.210.110, it will be forwarded to 192.168.20.14". Wink | ;)

Re: How to make a network connection at this case?

stancrm5-Jun-09 1:39

stancrm

5-Jun-09 1:39

"92.124.210.110" <- you don't mention it before.
probably you have a dynamic IP from your ISP.

Can we use pointers or similar in C# ?

Otex4-Jun-09 23:53

Otex

4-Jun-09 23:53

I need to use some sort of pointer or other way for a variable to contain the name of another variable, it is a bit difficult to explain but the following (not correct) code will give the idea.

string varName;
string myVar;

myVar = "varName";
&myVar = "Whatever";

Now Variable varName contains "Whatever"

Any ideas or directions ?

Thanks

Re: Can we use pointers or similar in C# ?

0x3c05-Jun-09 0:01

0x3c0

5-Jun-09 0:01

You're referring to unsafe code. Yes, you can. It's not recommended because of the potential for memory leaks, but it's possible. You wrap the code using pointers in an unsafe block, like so:

unsafe
{
    //Your code goes here
}

Then you have to coerce VS into compiling it. Project properties->Build->Allow unsafe code

Between the idea
And the reality
Between the motion
And the act
Falls the Shadow

Re: Can we use pointers or similar in C# ?

Otex5-Jun-09 0:15

Otex

5-Jun-09 0:15

Actually re-reading it I see I explained it wrongly.
What I need is an evaluations something like below is often used in scripting languages.

string varName;
string myVar;

myVar = "varName";
eval(myVar) = "Whatever";

Now Variable varName contains "Whatever"

Basically I have an array with 2 columns, 1st column has the variable name and the second has the value.

I do not want to have something like
for(x = 0; x < arrayRows; x++;)
{
if(array[x,0] = "myVar1") {myVar1 = array[x,1]}
if(array[x,0] = "myVar2") {myVar2 = array[x,1]}
..
..
}
I would like something like
for(x = 0; x < arrayRows; x++;)
{
eval(array[x,0]) = array[x,1]}
}

Of course eval does not exist in C#

Any ideas or directions ?

Thanks

Re: Can we use pointers or similar in C# ?

0x3c05-Jun-09 0:21

0x3c0

5-Jun-09 0:21

As CG said below, you may want to use a class to store these values, using Reflection (namespace System.Reflection) to get their names and get and set their values dynamically

Between the idea
And the reality
Between the motion
And the act
Falls the Shadow

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