how to know if th file is open ? - C# Discussion Boards

Robert Rohde29-Jul-05 20:02

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

zaboboa

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

Re: Div operation

Luis Alonso Ramos29-Jul-05 6:46

Luis Alonso Ramos

29-Jul-05 6:46

See:

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

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!

Re: Div operation

zaboboa29-Jul-05 7:10

zaboboa

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.

Re: Div operation

Luis Alonso Ramos29-Jul-05 7:14

Luis Alonso Ramos

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!

Re: Div operation

zaboboa29-Jul-05 7:42

zaboboa

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

Re: Div operation

Luis Alonso Ramos29-Jul-05 7:45

Luis Alonso Ramos

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!

how to know if th file is open ?

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

Luis Alonso Ramos

29-Jul-05 7:31

Use panels. Put all controls belonging to a "tab" inside a panel of their own. Overlap the panels, and show the panel that should be visible. Hiding a panel automatically hides all controls inside of it.

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

Re: Control grouping on Windows form?

Mutty29-Jul-05 10:22

Mutty

29-Jul-05 10:22

Thank you, this works very well.

-mutty

System.Diagnostics.ProcessStartInfo

dhm00129-Jul-05 4:23

dhm001

29-Jul-05 4:23

I’m running an external process using “System.Diagnostics.ProcessStartInfo” and have encountered and interesting problem. When I compile and run the debug version it works fine, but when I compile and run the release version it fails. Anybody encounter this problem before?

Thanks

Dave
dhmnet.com

Re: System.Diagnostics.ProcessStartInfo

Dave Kreskowiak29-Jul-05 4:33

Dave Kreskowiak

29-Jul-05 4:33

Nope. "Fails" is a pretty generic description of the problem. So, what exception does it throw?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: System.Diagnostics.ProcessStartInfo

dhm00129-Jul-05 4:48

dhm001

29-Jul-05 4:48

The interesting thing is the application does not throw an exception; it is Windows complaining that a dll is not registered when the external application is being run. The error reads like the following:

"MMC failed to initialize because it was installed incorrectly or because a portion of the registry has been corrupted."

The program I'm actually running is Device Manager (devmgmt.msc). It's like when I run the release version I'm not getting the Windows evironment or something.

Dave
dhmnet.com

Re: System.Diagnostics.ProcessStartInfo

Dave Kreskowiak1-Aug-05 6:17

Dave Kreskowiak

1-Aug-05 6:17

Very strange. I can't find anything on the problem.

This only happens when the app is compiled Debug?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

style sheet

zapap29-Jul-05 4:07

zapap

29-Jul-05 4:07

I'd like to get and set the left property in a css in my code behind file.

Style sheet:
#lblLabel
{ top:100px;
width:100px;
}

Code behind file (c#)
protected override CreateChildControls()
{ // Add the opening html ...

// Add the Label
string sLeft = 0;
Label lblLabel = new Label();
lblLabel.ID = "lblLabel";
lblLabel.Text = "Hello";
lblLabel.Style["left"] = "100px"; <=========== works fine
sLeft = lblLabel.Style["left"]; <=========== doesn't work ???
Form.cantrols.Add(lblLabel);
}

If anyone can help me, I'd me very grateful.
Thx

There is someone in my head but it's not me - Pink Floyd

Re: style sheet

Guffa29-Jul-05 4:26

Guffa

29-Jul-05 4:26

Standard question #1:
What do you mean by "not working"?

When I try your code, I get the value "100px" in the string sLeft, just as expected. You put the value in the Style collection and read it on the next line. Why shouldn't that work?

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

Re: style sheet

zapap30-Jul-05 4:39

zapap

30-Jul-05 4:39

// Hi

// I see that my question is not very clear...

// I set the left in the css file.
#lblLabel
{ Left:100px;
...
}

// Now in the code behind.

...
Label lblLabel = new Label();
string sLeft = lblLabel.Style["left"];
...

// now why is sLeft != "100px" ??

// Thank you.

There is someone in my head but it's not me - Pink Floyd

There is someone in my head but it's not me - Pink Floyd

Re: style sheet

Guffa30-Jul-05 7:17

Guffa

30-Jul-05 7:17

Because the value for the left style is present in the style sheet, not in the style property of the label. When you set the style on the id of the label, it only inherits the style, it's not copied into the style property of the label.

Furthermore, the css file is loaded by the browser, not the server. The server does not even know that there is a style added to the id.

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

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