Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully) - C# Discussion Boards

Re: Avoiding exceptions in socket programming

Not Active3-Sep-10 1:06

Not Active

3-Sep-10 1:06

Try/Catch

I know the language. I've read a book. - _Madmatt

Re: Avoiding exceptions in socket programming

Rob Philpott3-Sep-10 1:10

Rob Philpott

3-Sep-10 1:10

Yeah, sure I can use exception handling. But what I really want is to handle disconnections without it.

Regards,
Rob Philpott.

Re: Avoiding exceptions in socket programming

#realJSOP3-Sep-10 1:36

#realJSOP

3-Sep-10 1:36

Exception handling is the best way to approach it. If you want to, you can post an event in the exception block.

.45 ACP - because shooting twice is just silly
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"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
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"The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001

Re: Avoiding exceptions in socket programming

DaveyM693-Sep-10 1:35

DaveyM69

3-Sep-10 1:35

Good question. Not that I know of. The only way I've managed in the past is to send a custom SocketClosing message between them to inform the other. This only works if you are in control of both Server and Client code of course and will not handle 'improper' closure of either.

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

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ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

AussieLew2-Sep-10 17:53

AussieLew

2-Sep-10 17:53

I have just struck this. Using VS2008

private void button2_Click(object sender, EventArgs e)
            {

	    // ToolStripMenuItem.Visible always returns false?
            // This has the effect of not being able to toggle or invert the state to false by
            // assigning its negated value by use of the ! operator.
            // If the initial state is Visible = false the first click will toggle to Visible = true
            // Subsequent clicks do not change the Visible property as Visible always returns false
            // So, no matter the true state it will always set Visible = true rather than the inverse;
            

            // always returns false even if set to Visible = True
            bool cond1 = this.confirmDeletesToolStripMenuItem.Visible; 

            // always returns true
            bool cond2 = !this.confirmDeletesToolStripMenuItem.Visible; 

            MessageBox.Show(string.Format("Cond1 = {0} Cond2 = {1}",cond1,cond2));

            // try to invert the value of confirmDeletesToolStripMenuItem.Visible 
            this.confirmDeletesToolStripMenuItem.Visible = !this.confirmDeletesToolStripMenuItem.Visible;

            // still always returns false
            cond1 = this.confirmDeletesToolStripMenuItem.Visible; 

            // still always returns true
            cond2 = !this.confirmDeletesToolStripMenuItem.Visible; 

            MessageBox.Show(string.Format("Cond1 = {0} Cond2 = {1}", cond1, cond2));

            
            }

The confirmDeletesToolStripMenuItem is not the topmost menuitem.

If I get the value of any top level menu item it returns the correct value i.e True if set to Visible = True;

Whereas the lower menu levels return False even if set to True.

I would have thought that the Visible property is a reflection of whether it should be displayed rather than whether it can be seen?

I can set the Visible property directly eg this.confirmDeletesToolStripMenuItem.Visible = True; but still returns False.

Thanks for any help....

Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

Matt U.2-Sep-10 17:59

Matt U.

2-Sep-10 17:59

So, if the item is visible and you then do 'item.Visible = false;' does that make it disappear? And how about after 'Visible' is set to 'false'? If you then call 'item.Visible = true;' does the item actually show up again?

Just to make sure I'm clear, I don't mean "does that return true", I mean does it physically disappear/appear as it should?

That is unlike anything I've ever seen. I have a project that I'm working on in which I toggle the 'Visible' property for several menu and toolstrip items. Each of them works perfectly normal.

Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

AussieLew2-Sep-10 18:45

AussieLew

2-Sep-10 18:45

Matt U. wrote:
So, if the item is visible and you then do 'item.Visible = false;' does that make it disappear? And how about after 'Visible' is set to 'false'? If you then call 'item.Visible = true;' does the item actually show up again?

Yes when setting the Visible property in this way the item disappears and appears as you would expect.
It just always returns false. Even something like....

item.Visible = true;
bool isVisible = item.Visible;

returns false, despite actually being Visible. Hence the inabilty to Toggle based on it current state.

What I have found is that the top level menu items behave as expected, whereas the lower level, or at least mine on the 2nd and 3rd levels don't seem to behave?

modified on Friday, September 3, 2010 12:59 AM

Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

DaveyM695-Sep-10 7:20

DaveyM69

5-Sep-10 7:20

This is the correct behaviour. As the parent menu item isn't visible, it is impossible for the child to be visible therefore setting the Visible property has no effect.

You should either:

1. Set the visibility of the higher items first.
2. Use the Enabled property instead. You could iterate over all the items and set Visible based on Enabled.

private void SetMenuItemsVisiblity(MenuStrip menuStrip)
{
    foreach (ToolStripMenuItem item in menuStrip.Items)
    {
        item.Visible = item.Enabled;
        if (item.Visible && item.DropDownItems.Count > 0)
            SetToolStripMenuItemVisiblity(item);
    }
}
private void SetToolStripMenuItemVisiblity(ToolStripMenuItem item)
{
    foreach (ToolStripMenuItem subItem in item.DropDownItems)
    {
        subItem.Visible = subItem.Enabled;
        if (subItem.Visible && item.DropDownItems.Count > 0)
            SetToolStripMenuItemVisiblity(subItem);
    }
}

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

AussieLew6-Sep-10 1:49

AussieLew

6-Sep-10 1:49

Thanks Dave

DaveyM69 wrote:
This is the correct behaviour. As the parent menu item isn't visible, it is impossible for the child to be visible therefore setting the Visible property has no effect.

The parent menu item is visible.

If I get the value of any top level menu item it returns the correct value i.e True if set to Visible = True;

Whereas the lower menu levels return False even if set to True. (Even if the parent menu item is Visible)

It looks to me like a subitem returns false because it is not visible until the menu drops down from the parent.

Is this normal behaviour? Is the system changing the Visibility property temporarily until the menuitem drops down and is visible? (if the Parent is visible and even if subitem.Visibilty = true)

Lew

Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

DaveyM696-Sep-10 2:34

DaveyM69

6-Sep-10 2:34

Ah! Now I understand.

The Visible property returns whether it's actually being displayed right now. This should IMO be read-only in this case as setting it actually sets another property instead!

Check out the Available[^] property which behaves exactly as you want.

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

Re: ToolStripMenuItem.Visible always returns false? (Clarified hopefully)

AussieLew6-Sep-10 23:38

AussieLew

6-Sep-10 23:38

Thanks again Dave,

The documentation for Available actually explains Visible better than the Visible Docs.
I thought that it must have been working correctly, (in an odd way). Just couldn't see it in the documentation.

Thanks
Lew

PDF based project

AussieLew2-Sep-10 17:41

AussieLew

2-Sep-10 17:41

I have a project coming up (unpaid) indexing newsletters for a Gardening group I am a member of.
The newsletters are in PDF format. As I dabble in c# I thought I may be able to automate the process somewhat.
There appears to be a lot of c# pdf stuff out there to generate and manipulate .pdf docs.
Based on your experience I'm hoping to shorten the process of finding the right solution.

My initial needs are fairly simple....

1) Open an unprotected pdf document.
2) Browse the document.
2) Double click (or select somehow) different selected words.
(this should then highlight every instance of each selected word throughout the document as a visual cue it has been selected already)
3) Generate an index showing A) the selected word and B) the page number(s)

I have a lot of documents to process and they will continue to be ongoing so any help would be great.

what's in DragEventArgs in a dragdrop event

Louis-Etienne Chicoine2-Sep-10 8:53

Louis-Etienne Chicoine

2-Sep-10 8:53

i need to make a drag and drop operation between 2 labels.

in the dragdrop event of the destination i'm able to get the text from the source using

e.Data.GetData(DataFormats.Text)

My problem is that i need the rest of the properties from my source label. How do i get this?

thanks for your time

Re: what's in DragEventArgs in a dragdrop event

Luc Pattyn2-Sep-10 9:02

Luc Pattyn

2-Sep-10 9:02

Every D&D operation will transfer a DataObject with a format of your choice; if you choose DataFormats.Text, then all you can transfer is a string, which could be the label's text, its name, whatever you choose; you could even serialize the whole label in the one string.

You could also create your own DataFormat; that of course only makes sense if you are involved in the definition of both the source and the destination app involved in the D$D (assuming your D$D is inter-app). If all you are doing is making an intra-app D&D, then you could still do that, however if so you don't really need D&D at all, as you could just handle the mouse events and clone the Control involved.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

How do I convert an XML response of type GetLiveCompactWeatherByUSZipCodeResponse into usable strings?

SCADirector2-Sep-10 6:18

SCADirector

2-Sep-10 6:18

I'm using the WeatherBug API to retrieve weather data. Unfortunately there are no good examples or documentation for C# to help me with this. What I do know is that I'm making a SOAP call, receiving a SOAP response, which contains XML in an object of type GetLiveCompactWeatherByUSZipCodeResponse.

My question is: How can I get that soap response and get the XML? I know how to manipulate the XML but how do I get to it when it comes back as a type called GetLiveCompactWeatherByUSZipCodeResponse?

I'm calling this URL: http://api.wxbug.net/webservice-v1.asmx?op=GetLiveCompactWeatherByUSZipCode[^]

My code is:

WeatherBugWebServicesSoapClient proxy = new WeatherBugWebServicesSoapClient("WeatherBugWebServicesSoap");
result = proxy.GetLiveCompactWeatherByUSZipCode("52722", api.wxbug.net.UnitType.English, "xxxxxxxxxx");

result is a string (just to get the raw xml for now). When I do this the red line says: Cannot implicitly convert type api.wxbug.net.LiveCompactWeatherData to string.

Any help is much appreciated.

Is there a good example of using multiple forms.....

glennPattonWork32-Sep-10 5:11

glennPattonWork3

2-Sep-10 5:11

Hi,
Does anybody know of a good example of using variables between multiple forms.
I am in need of one as I could do it and now I can't (get, set and the rest!)

Glenn

Re: Is there a good example of using multiple forms.....

phil.o2-Sep-10 5:31

phil.o

2-Sep-10 5:31

Maybe you could start here[^]

Re: Is there a good example of using multiple forms.....

glennPattonWork32-Sep-10 6:17

glennPattonWork3

2-Sep-10 6:17

Great, thanks for that. But I'm looking for a way that Form1 can call up Form2, Form2 then has data that is passed back to Form1. Most of the methods I (yours included) Form1 passes the data to Form2 and not the other way I was looking at trying to alterone your methods to that but have come unstuck, is Properties approach the way to go or not and what is the overhead? All I'm think of doing is inputting three ints and away.

Glenn

Re: Is there a good example of using multiple forms.....

#realJSOP2-Sep-10 7:10

#realJSOP

2-Sep-10 7:10

Instead of doing it that way, you could just setup a static object that contains your data, and use that object in all of the forms. That way, when one form sets the data, the other form can read it, and change it as well.

Re: Is there a good example of using multiple forms.....

The Man from U.N.C.L.E.2-Sep-10 7:11

The Man from U.N.C.L.E.

2-Sep-10 7:11

If you use ShowDialog to display Form2 then after it has closed all the properties of Form2 are available to you until the instance is disposed, or goes out of scope.

If you have knowledge, let others light their candles at it.
Margaret Fuller (1810 - 1850)
[My Articles] [My Website]

Re: Is there a good example of using multiple forms.....

Henry Minute2-Sep-10 6:22

Henry Minute

2-Sep-10 6:22

I don't know if this will help:

Getting User Input With Dialogs Part 1[^]

Getting User Input From Dialogs - Part 2[^]

If at all Part 2 is more likely to be useful.

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.”

Re: Is there a good example of using multiple forms.....

DaveyM692-Sep-10 6:24

DaveyM69

2-Sep-10 6:24

Have a look at my tip[^] then my article[^] for a more complete tutorial.

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

Re: Is there a good example of using multiple forms.....

AussieLew2-Sep-10 18:53

AussieLew

2-Sep-10 18:53

DaveyM69 wrote:
then my article[^] for a more complete tutorial

Had reason to use this recently, a very helpful article from a helpful guy.
Thanks again Dave!

Re: Is there a good example of using multiple forms.....

DaveyM692-Sep-10 21:18

DaveyM69

2-Sep-10 21:18

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

Re: Is there a good example of using multiple forms.....

glennPattonWork32-Sep-10 23:40

glennPattonWork3

2-Sep-10 23:40

Hi,
Thanks for that it works one way Form1 to Form2, I am trying to get Form2 to Form1 (Don't ask Tower of Babel situation). Now I am trying the method for Form1 to Form2 reversed and running into problems. Very unpolitical correct give me Global variables back I promise not to abuse them !(like I did)

Glenn

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