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Hi, suppose I have
var A = new[]
{
new {Name ="Car", N = 2},
new {Name ="Bike", N = 100}
};
var B = new[]
{
new {Name ="Car", N = 10},
new {Name ="Plane", N = 1}
};
I would like to to the following using LINQ syntax: Join A nd B getting a total collection summing also N where same objects are the same... to be clear the final output should be:
{Name ="Car", N = 12},
{Name ="Bike", N = 100},
{Name ="Plane", N = 1}
Thanks for your time
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Here you go:
var query = from item in A.Union(B)
group item by item.Name into grp
select new { Name = grp.Key, N = grp.Sum(t => t.N) };
modified on Wednesday, July 20, 2011 10:46 AM
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Suppose now I have many var. So not only two (A and B) but many, let's say A,B,C....
Is it still managable? (I mean a union between many and not anly two)
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Why not try it out and see what effect it has?
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I'm only able to do union between two at time. My question is if I can do between many at the same time.
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And still I ask, why not try it out for yourself? You have the basic knowledge now, so it cannot be that hard for you to formulate your own opinion. Still, you can one vote this answer as well because I haven't spoonfed you the answer, rather I've suggested that you should now be able to think for yourself.
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Hello Everybody,
I have a polygon like :
A.......B...................C
. . .
. . .
D.......E ..................F
and My Starting Point is
A and I want to visit all the Points of Polygon.
And The Incoming of A is From B and D and Both.
So Solution For A is :
A <B
A < D
A < B,D
So pls how can i Generate All the Combinations of this polygon.
Thanks
If you can think then I Can.
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what have you tried yourself?
V.
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DateTime Data Problems in Silverlight and C#
Hello Forum.
I am using VISI Fire in Silverlight and C# to produce some data charts. One style of chart allows stacked data to be displayed in colums the xaml code I am using looks like this
[IMG]http://i67.photobucket.com/albums/h292/Athono/xaml.png[/IMG]
The chart i am trying to build is based on a visi fire chart example. if you go to http://www.visifire.com/silverlight_wpf_charts_gauges_gallery.php and look at their stacked examples here http://www.visifire.com/silverlight_stacked_charts_gallery.php you can see the xaml example I am trying to emulate.
http://i67.photobucket.com/albums/h292/Athono/post_this.png
But my chart comes out differently. mine has this odd overlaping date feature
[IMG]http://i67.photobucket.com/albums/h292/Athono/badrepresentation.png[/IMG]
Now, I have carefully stepped through the code and as far as I can tell, I have the same date for each data set pair.
[IMG]http://i67.photobucket.com/albums/h292/Athono/code-1.png[/IMG]
I have stepped through this code and I have made sure that with each value for i, the years and the months for each data pair are exactly the same. So why is my graph so messed up?
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Hi,
Maybe I'm not in the right forum. If so, accept my apologies and please re-direct me.
I am trying to install 'MS Visual Web Developer 2010 Expres' Actually I first installed Web Matrix, found it crap, and decided on the Next. First un-installed Web Matrix. Tried to install Visual Web Developer 2010 Express, it started with wanting to install SQL Express. Failed First, (After 2 hours) ostensibly because my disk was compressed.(Could that not have been detected early during setup, if that's a problem) Cloned the disk to a Larger One,usinf EaseUS, Undid the compression( as far as I could, went throuhg All Directories)(Some Files could not be Decompressed because they where in Use).
Tried Again. Got a message box: 'Installation Failed\nThe Version of SQL Express you are installing is Older than the version you have.'
Tried to use Windows Installer to uninstall. Started First to Last for SQL Server products,as listed. -:Fails on 'Cannot Uninstall this Component because other components are depending on it.'
Cloned the disk again to another disk, and started manually uninstalling components from the bottom to the Top, using Windows Uninstaller in other following orders, got messages:- To Uninstall This Component, you need XXXAXP DLL.
Rethorical Question, Why does a Microsoft Product not meet the Ms Uninstal/Failure to install specification written by microsoft themselves.
Question2, the Real question,
Where do I go from Here!
any help appreciated
Regards,
 
Bram van Kampen
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Well we are stabbing in the dark now so try installing Web Express on one of the uncomrpessed disks. Sounds like you now have SQL Express installed.
"You get that on the big jobs."
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Hi,
I want to write this project:
while load the form,the program(in Runtime),draws a Map on form,for exmple:Map of Asia,itself.
The program ask from the user about countries,for example,
Find Russia on the Map!
& the user must click on the map,on Russia.
I don't know where must I start,what algoritm do I use from this program?what namespace?or classes or Methodes?
Please,Gude me!
How do I start & continu & finish this program?
Thanks very much.
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Mahtab777 wrote: while load the form,the program(in Runtime),draws a Map on form,for exmple:Map of Asia,itself.
The computer doesn't know how to draw a map of a specific country by itself, that information is not embedded into your PC and will have to be provided by you.
You could import a picture, show it in a PictureBox, and have the user click it. You would than have to translate the location of the pixel to a known country. The easiest way to do that is by coloring different regions with different colors; once you know the pixel where the user clicked, you know what color, and hence, what region.
Bastard Programmer from Hell 
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Hi
Thanks for your guideing,
I used this way that you suggest,
but,I don't want to use this way,
I want that Program,itself,draws map on form,& finds out that the user where clicked,
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Them you are going to have to draw the map, and maintain a list of polygons that match the outlines of the regions. Then, when the user clicks on the map, you do a point in polygon check to see if they've clicked in the region.
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if you want to draw it yourself, you'll need a data source that contains all the elements to draw, mostly these are area's (polygons), lines (polylines) and dots, each area or line or dot has certain charactiristics like water, road, ... if you have all that you'll also need to find a way to link all elements and to zoom in/out the map.
In short (I probably forgot to mention most of the stuff anyway) you'll need to find a provider for the geographical stuff. For a fee they'll provide you with some assemblies you can use as well as the database with all information in it (and with updates if necessary).
hope this clarifies things for you.
V.
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Hi,
Thanks very much!
I want to use the Region class for Drawing Map on form & for Drawing countries on Map,
"Region" can helps me for this program?
Are there another ways for this program?
Are there a classes or components for creating & Drawing Map?
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Mahtab777 wrote: "Region" can helps me for this program?
It might, if you have all the borders stored as points somewhere.
Mahtab777 wrote: Are there a classes or components for creating & Drawing Map?
Not in the Framework; you'll either have to write them or look for something similar.
Bastard Programmer from Hell
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What I meant to say is, that if you want to draw a map you probably don't have the know-how (nor do I for that matter) to do it yourself within a reasonable amount of time. Normally such a task takes a lot of design and many resources to do it. If you need a map quickly you probably need a third party component (google maps perhaps?) or as someone already suggested a picture.
V.
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this is a really boring question so sorry in advance...
i am writing a pdf viewer (don't ask why or i'll have to kill you) and have most of the code working BUT the scrollbars are driving me slightly nutz
i have the picturebox control set to autosize inside of a panel set to autoscroll
when i set the (generated) image into the picturebox i get a vscrollbar (as expected) and no hscrollbar (again as expected because i resize the form client area to fit the width of the page i'm displaying)
when i shrink the window (with the mouse) i would have expected the hscrollbar to show up but no .. it doesn't
i do catch the form resize event and if the the client area is wider than the page being displayed i change the picturebox size mode to centered so it looks nice
otherwise i have tried all the 217 posts i have read on the net and they all say the same thing and they all don't work for me here
any help greatly appreciated
"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"
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How about dropping your PictureBox (full size) in a Panel, and let the panel worry about scrolling?
Bastard Programmer from Hell
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ummmmm that's what i am doing no?
"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"
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With the picturebox as large as the picture is, so it can scroll inside it's container?
The code below worked for me; is your picturebox by any chance smaller than it's container?
public partial class Form1 : Form
{
Panel somePanel;
PictureBox somePictureBox;
public Form1()
{
InitializeComponent();
this.somePanel = new Panel()
{
Dock = DockStyle.Fill,
AutoScroll = true,
};
this.somePictureBox = new PictureBox()
{
Size = Screen.PrimaryScreen.WorkingArea.Size,
BackColor = Color.Blue
};
this.somePanel.Controls.Add(somePictureBox);
this.Controls.Add(this.somePanel);
}
}
Bastard Programmer from Hell
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eddy thnx for the reply again
i see that you are making your picturebox a fixed size yes?
mine has to change as they zoom in and out of the "image" as well as scroll
i have it kind of working (god only know how) but i know the code is horrendous as it has a bunch of "magic fudge factors" in it as i am not familiar enough with .NET / C# and graphics etc
i think i am not getting the actual screen dpi for the bitmap dpi, as that means i need to do some rather opaque calcs on the scaling factor for the pdf renderer and and and... *sigh*
i think if i had a fixed size picturebox the code would work properly as that is a "trivial" case yes?
"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"
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l a u r e n wrote: i see that you are making your picturebox a fixed size yes?
Yup
l a u r e n wrote: i think if i had a fixed size picturebox the code would work properly as that is a "trivial" case yes?
It should be. You could try putting the PictureBox in a fixed-size container, and have that in a scrollable Panel again.
l a u r e n wrote: i have it kind of working
In a typical Dilbert-comic that gets translated to "it's ready to ship"! 
Bastard Programmer from Hell
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