C# Discussion Boards - CodeProject

OriginalGriff3-Apr-14 7:34

3-Apr-14 7:34

Don't repost: your question was already there...or your classmates...

Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

Kornfeld Eliyahu Peter3-Apr-14 7:37

3-Apr-14 7:37

We may ask CM to open a new forum for that class Laugh | :laugh:

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

OriginalGriff3-Apr-14 7:57

How Do I Generate A Time Table In C#

3-Apr-14 7:57

How big is a class in Pakistan? Laugh | :laugh:

Aisha Ali khan3-Apr-14 7:22

Aisha Ali khan

3-Apr-14 7:22

AOA!
How are you sir. I am doing the project of automatic timetable or custamizable time table.
I enter all the information which is necessary for this, like teacher, class, subject. But now i don't that how do i generate time table from this. any one help me in this please

OriginalGriff3-Apr-14 7:33

3-Apr-14 7:33

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!

So start by thinking about the task: get a pen and some paper, and do it manually, ignoring a computer.
Work out what processes you need, what data you need and how the processes affect that data.
Write it all down, and then do it again, following the processes and with the data on more paper. When you have an optimal set of data, and a set of processes that manipulate that data, you will have the design specification for your application. Actually coding it is the easy bit!

Kornfeld Eliyahu Peter3-Apr-14 7:36

3-Apr-14 7:36

OriginalGriff wrote:
get a pen and some paper, and do it manually, ignoring a computer.

That's what you teach the new generation?! Shame on you...parer he says...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

OriginalGriff3-Apr-14 7:55

3-Apr-14 7:55

Afraid so... It divorces the task from the computer, and gets you thinking about it as separate data items and processes, instead of considering implementation details.

Even a tablet "focuses" you on the computer elements of the solution, instead of considering the task as a discrete operation.

Try it! You might be surprised...

Kornfeld Eliyahu Peter3-Apr-14 8:08

How to delete row from datatable on client side

3-Apr-14 8:08

I am. Is spend over 70% of my development time on whiteboard or LibreOffice...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

Member 105807702-Apr-14 22:55

Member 10580770

2-Apr-14 22:55

I am working on asp.net web application. I have a code which display data to the user in table format through Repeater Control. There is one column which has two signs plus and minus. I have to display data of n records, so there could be maximum n no. of rows. Initally there will be textboxs User will fill details in that if he wants, When user clicks on plus sign, one row will be added to repeater.if he clicks minus in a row that particular row will be deleted.This process handled on client side not on server side.
So i have yet done plus button code through datatable...Now i want to remove the row on client side through minus button ..
Any One help......plz

protected void btnAdd_Click(object sender, EventArgs e)
{

if (!dt.Columns.Contains("Sno"))
{
dt.Columns.Add("Sno");
}
if (!dt.Columns.Contains("ItemName"))
{
dt.Columns.Add("ItemName");
}

if (!dt.Columns.Contains("ItemQuantity"))
{
dt.Columns.Add("Quantity");
}

if (!dt.Columns.Contains("Price"))
{
dt.Columns.Add("Price");
}

if (Session["datatable"] != null)
{
dt = (DataTable)Session["datatable"];
}
dr = dt.NewRow();
dr[0] = txtSno.Text;
dr[1] = txtItemName.Text;
dr[2] = txtQuantity.Text;
dr[3] = txtPrice.Text;

repeater1.DataSource = dt;
repeater1.DataBind();

}

Re: How to delete row from datatable on client side

thatraja2-Apr-14 23:52

thatraja

2-Apr-14 23:52

Check this tutorial
Different operations on Datatable (Add, Edit, delete, Sort etc) and XML[^]

thatraja

Code converters | Education Needed
No thanks, I am all stocked up. - Luc Pattyn
When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is - Henry Minute

Re: How to delete row from datatable on client side

Member 105807703-Apr-14 1:38

Member 10580770

3-Apr-14 1:38

Thanx .........thats work..

Converting US7ASCII data to UTF8

Member 76933002-Apr-14 19:36

Member 7693300

2-Apr-14 19:36

Hello,

I need to convert US7ASCII data to UTF8 or binary without changing the character set.
I just can search the broken data becasue the stored data is not English.

I tried like this :
Select convert(column_name, 'US7ASCII', 'UTF8') From table_name
But that didn't work at all.

Did I try wrong?

Please give me some ideas..
Thanks!

Re: Converting US7ASCII data to UTF8

Kornfeld Eliyahu Peter2-Apr-14 20:19

Re: Converting US7ASCII data to UTF8

2-Apr-14 20:19

Do we talk about Oracle? You are in the wrong place, mt friend!
But! If I remember well the encoding called AL32UTF8 and not UTF8 - that may be your problem...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

Member 76933002-Apr-14 22:36

Member 7693300

2-Apr-14 22:36

I tried AL32UTF8. But It didn't work..
Thanks, though.

Re: Converting US7ASCII data to UTF8

Bernhard Hiller2-Apr-14 20:50

Bernhard Hiller

2-Apr-14 20:50

Ehm, you show us a SQL query here in the C# forum...
Let me assume that you use a .Net application written in C#, and retrieve the data from the database. You could use the System.Text.Encoding namespace, with the GetBytes function for the encoding used in your db, and the GetString function for the target encoding.

Math.Pow

computerpublic2-Apr-14 9:51

computerpublic

2-Apr-14 9:51

Hello,
I am trying to code the expression 9*10^18 which evaluates to 9000000000000000000. I am using a 64 bit machine, so I am within limits. Math.Pow only allows for Math.Pow(9,18) and that gives me the wrong number. Can someone please show me how to implement the whole expression using the Math.Pow.

Thank You.
New Guy

Matt T Heffron2-Apr-14 9:59

Matt T Heffron

2-Apr-14 9:59

Math.Pow(9,18) is 9^18, not 9*10^18.
if you have the general case of:
A*B^P
then you want
A * Math.Pow(B, P)

Matt T Heffron2-Apr-14 11:50

Matt T Heffron

2-Apr-14 11:50

In addition to my answer above, if you really just have constants of the form A*10^P (e.g., 9*10^18) then the compiler is totally fine with exponential notation:
AeP (e.g., 9e18)

BillWoodruff2-Apr-14 13:36

BillWoodruff

2-Apr-14 13:36

If you really want #90 raised to the 18th. power, you are going to need to use a "big integer:"

1. assuming you are using .NET >= 4.0

2. add a reference to your project to the System.Numerics library.

using System.Numerics;

public BigInteger ToBigPower(BigInteger value, int power)
{
     return BigInteger.Pow(value, power);
}

// sample use in a method
BigInteger x = ToBigPower(9*10, 18);

If you inspect the value of 'x above in the Command window of Visual Studio:

> ? x
{150094635296999121000000000000000000}
IsEven: true
IsOne: false
IsPowerOfTwo: false
IsZero: false
Sign: 1

If you are using .NET < 4.0, see this for links to alternate strategies: [^]

“Use the word 'cybernetics,' Norbert, because nobody knows what it means. This will always put you at an advantage in arguments.” Claude Shannon (Information Theory scientist): letter to Norbert Weiner of M.I.T., circa 1940