Re: Div operation - C# Discussion Boards

29-Jul-05 9:48

Hello,

Is there a way of making a specific cell in the column of a Grid - ReadOnly.

Thank you.

Re: DataGrid cells

Robert Rohde29-Jul-05 20:02

Robert Rohde

29-Jul-05 20:02

Short answer: No.

Long answer: Uhmmm... well... yes. But its a bit complicated:

You will have to inherit from the DataGridTextBoxColumn and override the Edit function. Here you could throw an event with CancelEventArgs, catch it somewhere outside and determine from the CurrentCell whether it should be ReadOnly or not (and set the Cancel of the EventArgs).

Div operation

zaboboa29-Jul-05 6:40

29-Jul-05 6:40

Hello,

Is there a way to implement a div operation on two numbers?
I need the quotent result.

So if I have two decimals, and my result after division is 5.2, I need only 5.

Thank you

Luis Alonso Ramos29-Jul-05 6:46

See:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemMathClassFloorTopic.asp[^]

29-Jul-05 6:46

double num1 = 26f;
double num2 = 5f;
 
double result = Math.Floor(num1 / num2);

Good luck!

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

zaboboa29-Jul-05 7:10

29-Jul-05 7:10

Thank you.

By the way, do you know how to format the decimal output to only 4 decimal points?

If I have:

decimal totalArea = (NetRes * DevRes);
how do I format totalArea to have 4 decimal points?

Thank you.

Luis Alonso Ramos29-Jul-05 7:14

29-Jul-05 7:14

You don't format totalArea to 4 decimal digits. You could round it to 4 decimal digits, which is a bit different:

totalArea = Math.Round(totalArea, 4);

Here you are changing the number itself. Also, you can convert to string with 4 decimal digits:

string area = totalArea.ToString("0000");

This last statement will fill area with the string representation of totalArea, with 4 decimal places. totalArea won't be modified and will keep all its digits.

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

zaboboa29-Jul-05 7:42

29-Jul-05 7:42

Thak you.

Luis, wanted to ask you one more question.
I have a dataview on a Table, and I apply a RowFilter on it:

dataview.RowFilter = "TimelineID IS NULL";

If I output the dataview.Count, it equals 2. So, do you know how I can access these rows in dataview? I don't want to use dataview.Table.Rows, becuase it returns all the rows in the dataview.

Thank you
and sorry to bother you with so many questions

Luis Alonso Ramos29-Jul-05 7:45

how to know if th file is open ?

29-Jul-05 7:45

<code>foreach(DataRowView row in dataview)
{
    int x = (int) row["x"];
}

or you could also:

int x = (int) dataview[rowIndex]["x"];

zaboboa wrote:
Thank you
and sorry to bother you with so many questions

Don't worry, I'm here to help! You're very welcome! Smile | :)

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

horacyjr29-Jul-05 5:48

horacyjr

29-Jul-05 5:48

i have a program, that scan files in a directory .
i need to know, if is the file open or in edit mode, or if it Changes the size.
Is there any way to do that, any method like IsOpen?

Re: how to know if th file is open ?

Niklas Ulvinge29-Jul-05 9:59

Niklas Ulvinge

29-Jul-05 9:59

I think you could simulate it. Try to open it, if it works, then it isn't open otherwise it's close.

Niklas Ulvinge aka IDK

Fixing JPEG header files?

Madterps29-Jul-05 5:27

Madterps

29-Jul-05 5:27

Did anyone has seen a C program that fixes JPEG header files? I've saw it before and unfortunately haven't had time to copy it down. I would love to compile it and run it. Any tips in tracking position before pointer and after pointer would also help, I've always thought it was *+1 or *-1 Thanks!

RichTextBox line

nc3b29-Jul-05 5:23

nc3b

29-Jul-05 5:23

Say that i want to get the text that is found on a specific line of the text box... (say line 5). How do i do that? Pls help.. thx Smile | :)

Re: RichTextBox line

leppie29-Jul-05 7:02

leppie

29-Jul-05 7:02

string txtline5 = rtb.Lines[4];

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Re: RichTextBox line

Judah Gabriel Himango29-Jul-05 8:12

Judah Gabriel Himango

29-Jul-05 8:12

Well, that will give you the 5th line of text, not counting word-wrapper lines.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Homosexuality in Christianity
Judah Himango

Re: RichTextBox line

nc3b29-Jul-05 10:22

nc3b

29-Jul-05 10:22

Hey, thx everybody Smile | :)

Control grouping on Windows form?

Mutty29-Jul-05 4:26

Mutty

29-Jul-05 4:26

I have a small area on a windows form that, based on user input, should have different controls displayed. The way I'm thinking to do it is to just overlap all the controls in design, and then change the .visible property of individual controls as needed. Ugly. Is there a better way to do this?

I don't want to use tabs, since the space is small and I don't want the other tabs visible.

Thanks -mutty

Re: Control grouping on Windows form?

Luis Alonso Ramos29-Jul-05 7:31