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If you are living in 3D then yes every vector should have 3 coordinates. This is true also for 2D and 2D only have 2D vector. This implies to all dimensions. If you studding theory of relativity then you need 4D vectors where time is also one of the components. Let’s make life simple, and only worry from 1D to 3D which we are dealing with WPF.
LOL
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The short answer is if you want to say so. (Normally, I would not say that vectors "start" anywhere per se.)
The long answer is that you are brushing up against one of the hardest things about programming, "Data doesn't mean anything until you say it does." Take for example, the Point and Size classes. Both have 2 integer (or double or float or whatever) components. Both could be used to store the exact same data, but the different structures exist because that is how we assign meaning to the data. So, the implicit assumption made by the designers of Vector3D is either that all vectors "start" at (0,0,0) or that the vector is the more abstract concept of an amount of travel in a direction.
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i want to write code for wpf textbox control keypress event.i want to enter data this textbox numbers only.this code correct for winforms
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (char.IsLetter(e.KeyChar) == true)
{
e.Handled = true;
}
}
how to write this code for wpf textbox control....
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You've already posted this question once. Please don't repost just to bump your question to the top - it's inconsiderate of others.
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how to create keypress event for textbox control(wpf application)
please help.
thank you.
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In your textbox declaration, add the following handler:
PreviewKeyDown="KeyDownHandler" In the codebehind, you will add the code:
private void KeyDownHandler(object sender, KeyEventArgs e)
{
}WPF allows you to preview commands, so there is no need to use a keypress to validate the item because you can cancel it here by setting e.Handled = true; in response to your test.
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how to create reports(same crystal reports) using access or sql server compact 3.5 data base for wpf application. please help.
Thank You.
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That's a fairly broad scope you've got there. Are you asking how you recreate all of Crystal in WPF, or do you just want to display a tabular report? I would suggest that you might want to look at one of the commercial grid controls such as the Xceed WPF grid control then you can display reports quite easily.
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Hi
I am just trying to convert my web app developed in .net to Silverlight.
So I am worried about repeating all the lengthy code(for design in xaml page)every time.So if anybody knows or can guide to come out of this.In simple words I need a replacement of MasterPages or Include files in silverlight 2 Beta 2.
Nirav 
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Nirav_Vyas wrote: Include files
You can add a DLL reference to use any previously build classes and methods.
Nirav_Vyas wrote: MasterPages
There is no native support for master pages in silverlight. However to implement a similar functionaly, you can do something like this:
- Create your main page (acting as a master page) such that you leave some space for your content (similar to the content place holder)
- Create separate user controls for each of the pages and build some logic to dynamically load the appropriate user control into that content space
Hope that gives an abstract idea.
Regards,
Syed Mehroz Alam
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Thanks Buddy
I am on verge of completion of my first SL web app.If u knw more about SL.can you tell the best way for validation(it will b good 2 hv some samplecode) And do u knw wen is SL 2 ful version will b released.Thanks again 4 replyin
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Hey guys...
still busy writing the calender control in WPF, now I've got a silly little issue.
[Background Info]
This control will be used as a roster, so a shift needs to be allocated do a specific day.
When the day is not used(its a blank block OR there is no shift allocated on that day) its background is Grey. If a shift is allocated to a day that days background goes blue, if the day is an off day the background goes RED.
All the day numbers of the cells are black text, accept Sundays which have red text.
[/Background Info]
my problem is having an off day on a Sunday, you cant see the day number(red text on a red background), id like to try and have a black outline for the red text...
Any thoughts, ideas or links?
Thanx alot
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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Harvey
Create a FormattedText object to represent your text, and then use BuildGeometry to create a Geometry object on this. See here[^] for ideas how to accomplish this.
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Thanx pete
ill have a look
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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Hi dudes!
i just don`t know how to do this and can`t find and answer to this, i want to add a hyperlink image in richtextbox, hyperlink class doesn`t seem to work with images like hyperlink that is the problem.
Can somebody tell me what to do??
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<richtextbox>
<flowdocument>
<hyperlink>
<image source="" />
</hyperlink>
</flowdocument>
</richtextbox>
Cheers, Karl
» CodeProject 2008 MVP
My Blog | Mole's Home Page
Just a grain of sand on the worlds beaches.
<div class="ForumMod">modified on Saturday, August 30, 2008 9:40 PM</div>
-- modified 27-Feb-21 21:01pm.
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sorry i am new to this
but where do i put that?, how can i do that with C#? 
and thanks for that answer dude 
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The below code is XAML, no code is required.
<RichTextBox>
<FlowDocument>
<Hyperlink>
<Image Source=" PUT THE IMAGE PATH & NAME HERE " />
</Hyperlink>
</FlowDocument>
</RichTextBox>
Cheers, Karl
» CodeProject 2008 MVP
My Blog | Mole's Home Page
Just a grain of sand on the worlds beaches.
-- modified 27-Feb-21 21:01pm.
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oh i got it working now.  But now i need it in C# code cause i need this stuff to be dinamicaly created
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Cool.
Well, XAML is just another method of creating objects.
So just create the objects in code and nest them just like the XAML is.
RichTextBox and FlowDocument creation in code is an advanced WPF topic. But I'm the same way, if its hard, just go for it.
There is a SUPER book on writing WPF code: http://www.charlespetzold.com/wpf/index.html[^]
I strongly suggest you have a look at this. You can probably get a used one on www.Amazon.com.
modified 27-Feb-21 21:01pm.
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Hey guys...
ive got a WPF control(calender), im using a grid to split it up into cells. Each cell contains a Border, Canvas, WrapPanel, and two textBlocks.
The 1st Textblock will be used for the number that represents the day of the month and the 2nd will have a string value. I cant seem to get the 2nd textBlock to behave like i need it to.
I need its text to wrap around if the sting is vertically too long for the grid cell to show it all, and i need to "Dock" the stack panel to the canvas so that its the same size(and ontop of) as the canvas.
Heres my XAML for a single cell
<Border Name="Border00" Grid.Column="0" Grid.Row="2">
<Canvas Name="Canvas00" Grid.Column="0" Grid.Row="2" >
<StackPanel>
<TextBlock Name="dayTxt00" Text="1" />
<TextBlock Text="WPF Shift Harvey Blah" HorizontalAlignment="Center" FontSize="8" Foreground="#AAFF0000"/>
</StackPanel>
</Canvas>
</Border>
any ideas?
Thanx
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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To solve your second question, you can bind the width and height of the StackPanel to it's parent.
<Canvas>
<StackPanel Height="{Binding ActualHeight,
RelativeSource={RelativeSource AncestorType=Canvas}}"
Width="{Binding ActualWidth,
RelativeSource={RelativeSource AncestorType=Canvas}}">
</StackPanel>
</Canvas>
After that, just make sure to set the text wrapping property on the TextBlock and you should be all set
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Hey guys,
For some strange reason i cant seem to get events working in on of my WPF controles, its basically a calender(in progress so there isnt much happening yet) and each cell that represents a day in the month must be able to handle left and right click events.
The control uses a Grid, there are also border objects so that the grid lines are visible, and the cells representing the days have canvas objects in them.
Im sure that im overlooking something stupid, but i cant seem to figure out why the events arent firing. the control is being used in a winForms solution if thats of any help.
<Edit>
After i nested the controls properly, and then registered the event on the lowest control(in my case the border) the events worked
</Edit>
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
modified on Wednesday, August 13, 2008 10:03 AM
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