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I have a datatable containing a date field which I have databound to a textbox on a form (the textbox is read only). Sometimes the date field is null, so in those cases I want to have the textbox (and it's associated label) disappear completely. I tried intecepting the Binding.Format event to example the value from the data source and set the visibily of the textbox control like this (tbValidTo is the textbox, lblValid is just a label):
<br />
private void tbValidTo_Format(object sender, ConvertEventArgs e)<br />
{<br />
if (e.Value == DBNull.Value)<br />
{<br />
if (tbValidTo.Visible)<br />
{<br />
tbValidTo.Visible = false;<br />
lblValid.Visible = false;<br />
}<br />
}<br />
else<br />
{<br />
if (!tbValidTo.Visible)<br />
{<br />
tbValidTo.Visible = true;<br />
lblValid.Visible = true;<br />
}<br />
DateTime dt = DateTime.Parse(e.Value.ToString());<br />
if (dt<DateTime.Now)<br />
{<br />
lblValid.ForeColor = Color.Red;<br />
}<br />
else<br />
{<br />
lblValid.ForeColor = SystemColors.WindowText;<br />
}<br />
e.Value = dt.ToString("MMMM d, yyyy");<br />
}<br />
}<br />
The problem is that this code is acting really weird. As you flick between records it sometimes fails to update the textbox and instead contains the old value. Sometimes it fails to reappear when flicking from a null date record to a record with a data. When I set a breakpoint at the begining of the event I can see that usually the event fires only once when you change records but sometimes it fires 3 times (it gets as far as setting the visibility and then suddenly refires) and other times it doesn't fire at all. Can anybody suggest what the problem here might be? I have another double field that also get's hidden and it works fine so long as the date field is disabled, otherwise it does the same thing. Other fields (that don't get hidden but do get formatted) behave just fine.
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I have a class called tasks and right now it uses compareto to sort by duedate when it is in an arraylist, that is fine for right now, but I'm expanding to group by category. I now want to sort by category and then sort by duedate within the category sort. Is this possible? Here's my class:
<br />
public class Task: IComparable<br />
{<br />
private int _importance;<br />
public int Importance<br />
{<br />
get { return _importance; }<br />
set { _importance = value; }<br />
}<br />
<br />
private DateTime _DueDate;<br />
public DateTime DueDate<br />
{<br />
get { return _DueDate; }<br />
set { _DueDate = value; }<br />
}<br />
<br />
private string _subject;<br />
public string Subject<br />
{<br />
get { return _subject; }<br />
set { _subject = value; }<br />
}<br />
<br />
private string _entryID;<br />
public string EntryID<br />
{<br />
get { return _entryID; }<br />
set { _entryID = value; }<br />
}<br />
private string _category;<br />
public string Category<br />
{<br />
get { return _category; }<br />
set { _category = value; }<br />
}<br />
<br />
public int CompareTo(object other) <br />
{ <br />
return _DueDate.CompareTo(((Task)other)._DueDate); <br />
}<br />
<br />
}<br />
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Try this:
public int CompareTo(object value)
{
Task compObj = (Task) value;
int result = _category.CompareTo(compObj._category);
if (result == 0)
result = _DueDate.CompareTo(compObj._DueDate);
return result;
}
www.troschuetz.de
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my drop down boxes are not returning the correct choice when a user picks one. It still shows the old one. How can I get my code to see the new choice? In VC++ there was the UpdateData() function. Is there one similar to that in C#?
Thanks
Tom Wright
tawright915@yahoo.com
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ComboBox1.SelectedItem returns the current selection.
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Can anyone offer any recommendations / tips for designing an 'options' dialog.
I just have a form with tabs for the the various categories, onChange events for the various form elements and I read / write my app.config file.
Seems a bit messy and ad-hoc, is there a a better way ?
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Hello!!
I need to get the size of all images from an html page but i cant do one thing.
Whith this expression i get only images where heigth and width come in this order.
Ex:
<img src="../home/images/topo_01.gif" height="107" width="213">
<img src="../home/images/topo_01.gif" width="213" height="107">
i can make only one to work.
How do i do this?
r = new Regex("<\\s*img.*height=\"(?<heigth>.*?)\".*width=\"(?<width>.*?)\".*>", RegexOptions.IgnoreCase | RegexOptions.Compiled);
thanks!! 
Bruno Conde
pharaoh
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r = new Regex(@"<img.+(height="?(?<height>[^"]+)"?\s+width="?(?<width>[^"]+)|width="?(?<width>[^"]+)"?\s+height="?(?<height>[^"]+)).*>")
This works fine for me 
Remember you can put an "@"-sign in front of your string declaration, so you don't need to escape certain characters. This comes in very handy with regular expressions.
regards
-- modified 12-Sep-18 21:01pm.
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I need a Cyclic Visual for a form I am developing. A cyclic is the control in a helicopter that the pilot usings to steer the aircraft. What I need is an overhead view of the position of the cylic. I.e. a circle with maybe a dot or something indicating its position. Any help would be much appreciated. Thanks
D
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this is a really easy question....if i put a save file dialog on my form...how can i check if the user clciked the okay or cancel button...
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hi there,
use DialogResult to achieve this.
for more detail, visit this:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformsdialogresultclasstopic.asp
<< >>
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I've got a problem with latebind word in my app because I have to be independent from the installed office-version. With my first attemp to fill in the adresse-field of word-form it worked very efficent. I just referenced word, created a dot-file with some fields "Name, adress, zip and townname" in the form and coded oWordApp.ActiveDocument.FormFields.Item(ref cField1).Result = this.cmbAnrede.Text.Trim(); and so on. That works quiet well. But now, as I'm trying to do it latebound, to be independent of the office-version, this doesn't work anymore.
Can anybody hand me an ax to find my way out of the deep forrests?
regards
Klaus
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It's generally best to bind to the lowest supported version of Word, and it will work on the newer versions of Word as well. So, if you support Word 2000 and Word XP, bind to Word 2000, and it will work for Word XP, too.
John
"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.
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John,
no I don't think so. That's why I tried to make it latebound <g>. In the beginning I coded it with Office97. It worked fine! Now the system is slowly turned to work with OfficeXP. The first workstation on which my routine was called, an error appeared.
I told the user "no prob. I'll compile it with OfficeXP. After a few minutes all works fine again, but from an other room they were yelling "Arrgh, my Computer is broken". You know, simple users are thinking of a ghost of/in the mashine<vbg>.
So, that's what my problem is. I'll have to make it kompatible with every thing.
thanks anyway
Klaus
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Do you still need to support Office 97? If so, the worst case scenario would be to move this Word code into a dll, then intelligently choose which dll to load based on the Word version. This means a very small piece of code, with two (or more) versions of the same (recompiled) code, using different versions of Word.
John
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is it advisable to port c# application to linux? If yes, how do you go abaout it? I heard of this thing called Mono? Does it work?
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search this on CP site...
<< >>
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How can implement the functionality of passing values from one form to another without creating the new instance of the second form. Actually i have to implement the "find" functionality in my application, How can i do this.
Sajid
MMIS
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hi there,
sajjo79 wrote:
passing values from one form to another without creating the new instance of the second form
=> u can use global variable
sajjo79 wrote:
Actually i have to implement the "find" functionality in my application
can u explain more?
<< >>
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public Payment()
{
InitializeComponent();
}
public Payment(string TableNumber)
{
string Table = TableNumber;
InitializeComponent();
}
For Example:
I wanted to pass the text of a label from the main windows form called Main to this Payment windows form.
Add another constructor with the specific type(Ex: string)
When you call it in the main form it will look like this:
In the main form i called Payment(string TableNumber)
Payment pay = new Payment(EmployeeName.Text);
pay.ShowDialog(this);
Now that i have done that Table contains the string that i needed for that form
Matt Srum
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I want to download a file which is present in server to client, how will I do that, for eg% if the file is present in Server's D:\(which is not the virtual directory path, say virtual directory is c:\wwwroot...
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hi there,
u mean that u want to download the file that does not belong to any site?
if so, u cannot download this through http, I think.
<< >>
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Try HttpResponse class's WriteFile() Method.
It writes the specified file directly to an HTTP content output stream.
- ashish
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i've started a toppic that is gone much in back... so i restart a new one.
if i create a dll i can't debug since to i create a enpty form in the same solution but a new project that call it, so i run the form project and i can debug now the dll.
i know this but i don't remember how to link the form to that dll.
How i include that working on dll at the main form?
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