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How will we be helping you by doing your work for you? Why don't you try to build something and ask questions if you run into problems?
/ravi
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CodeProject is huge. you will get solution with sample download. try It my friend . Code project will not disappoint you.
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Hello,
I have created application which uses Command line arg. I made it Single Instance using Mutex. When another instance of application starts, I want command line arg should be send to first (single) instance.
I cannot use Pipelining because I am using .net 3.0 framework. Socket programming is also not permissible.
In C# form based application we can use WM_COPY, but I am not able to override WndProc in WPF.
IPC using process name would be preferred over FindWindow.
Thanks in advance.
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You should really have asked this in the WPF forum. That's the place for WPF questions.
Pranit Kothari wrote: I am not able to override WndProc in WPF
Why not? It's as simple as:
void Window1_Loaded(object sender, RoutedEventArgs e)
{
HwndSource source = HwndSource.FromHwnd(new WindowInteropHelper((this).Handle);
source.AddHook(new HwndSourceHook(WndProc));
}
private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
}The normal way to do this though is to use a Mutex, as in:
private static Mutex mutex = new Mutex(true, "SomeUniqueIdentifierSuchAsAGuid");
private bool CheckSingleInstance()
{
return mutex.WaitOne(TimeSpan.Zero, true);
}
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Whatever .NET version you're having, you can use pipes using P/Invoke, i.e. calling the native Win32 functions directly. You would need CreateNamedPipe, CloseHandle, ConnectNamedPipe, DisconnectNamedPipe, ReadFile, WriteFile, CreateFile; and you don't need to override WndProc, you can have a separate thread reading from the pipe. That is how I did singleton apps right from the start. A class that does it all would take some 200 lines of code.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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Hello,
How can I see the SQL generated by DataAdapter.Update(dataset) - if any.
Here's a bit of context: I have a (typed) table adaptor (generated using Visual C# 2008) that fills a table from a query on a join (i.e. select all rows from a table that have a counterpart in another table). I managed to handle insertions (i.e. insert in the other table). Now for deletion...I set the DeleteCommand. I remove all the rows from the dataset and I call Update(). Nothing happens. Not even an exception. Either there's a problem with my DeleteCommand or it's never called. How can I find out ?
Thanks,
Jean-Louis
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Start the Sql profiler and connect to the server that you want to trace. Alternatively, you could add a trace yourself.
Start here[^]
I are Troll 
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I don't have SQL Profiler at the moment, I was wondering if it's possible to do it from within the program, e.g. if there is a logging facility built in datasets.
J-L
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AFAIK not, but you should be able to start a trace using TSQL-commands, without having the Profiler. The statements are listed here[^], with some short explanation.
I are Troll
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DataAdapters can only do very simple things -- e.g. working with only one table, with a primary key -- I don't think they have the smarts to Update joined data.
Experienced developers don't use them.
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> DataAdapters [...] -- I don't think they have the smarts to Update joined data.
That's why I provide an InsertCommand (which works fine) and a DeleteCommand (which isn't called  ). I won't need an UpdateCommand because I'm actually managing two listboxes to update an underlying link table.
> Experienced developers don't use them.
I'm not that experienced yet  I'm learning and trying to do things the proper .NET way, e.g. use DataSets instead of raw SQL. Also, typed datasets look like a good idea.
What would you recommend ?
J-L
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Jean-Louis Leroy wrote: the proper .NET way, e.g. use DataSets instead of raw SQL.
That's the lazy way; it leads to poor quality and frustrations like you have now.
Jean-Louis Leroy wrote: What would you recommend ?
Just use SQL; it sounds like you know how.
Read this[^].
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Hi
I have a datagird and a searchfunction wich shows only datagridrows contain the searched Keyword.
Now i would like to highlight the Searched Keyword in the datagird, i can get acces to the row or cell contains the keyword and also highlight them(for example like this: http://blogs.microsoft.co.il/blogs/tomershamam/archive/2009/08/27/wpf-datagrid-search-and-highlight.aspx ).
But how can i highlight only the keyword like google or opera-browser etc.?
Thanks very much.
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You'd have to handle the CellPainting event (.NET 3.0 and above only!) and custom paint every cell in the grid that's being displayed. You'd check to see if the cell contains the search words and custom paint the cell if needed, otherwise let the default painting code render the cell.
If you can't custom render the cells, you may want to try just highlighting the individual cells that conatin the search words. This would be done through the CellFormatting event (.NET 2.0 and above).
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Hi Dave and thanks for the Answer.
I dont wanna paint whole the cell but only the keyword. I will handle that with the CollectionInline but i dont know how to seperat the word into normal parts and highlighted part ( keywordpart).
Cheers
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In theory, there's a compule of ways of doing it.
First, you have to split the string on the keyword. Say you have a sentance that has one instance of your keyword in it. You split the sentence at the keyword, drawing the first part of the sentance as normal, drawing the keyword part next, then drawing the remaining part of the sentance. The hardest part of this would be tracking exactly where the drawing coordinates would be as you move from segment to segment.
The second idea would be to draw the entire sentence, then go back and find the position of each keyword, drawing a transparent highlight box over the parts you want. finding those drawing coordinates would be the difficult part.
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yes thats the difficult part, thats why i m posting here in hope someone has an idea, snippet or something how i can resolve the spliting problem.
Cheers
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There are two possibilities:
1.
you use a non-proportional or monospaced font such as Courier New or Consolas; then you can simply count the number of characters, multiply that with an appropriate factor (not an integer!), and use that to calculate your starting and ending positions. The factor depends on font size and more. Either experiment or use #2. (What I do in simple situations is call Graphics.MeasureString once on a string of length 100, then store one hundredth of that as a permanent factor using a float).
2.
you use any font you like; with Graphics.MeasureString() you can obtain the width a string will require when going to be painted using Graphics.DrawString() provided you give corresponding parameters; warning: it could be off by a few pixels due to some internal anomalies.
If it sounds complex, that is because it is.
BTW: there are some good articles that include this subject here at CodeProject, including a recent one; look for things such as "syntax color", "syntax highlight", "TextBox".
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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Like Luc said, this ain't easy at all. I've just scrapped together a test and found it's quite complex.
On top of this, you'll have to create your own version of the DataGridViewTextBoxColumn class to even start using this is a DGV. Great, even more complexity! Have you ever created a custom DataGridViewColumn class? Not easy, nor fun!
You really have to start asking yourself if this little feature is really worth the effort?? Is it cheaper to possibly find a grid control that already has this capability compared to your cost to develop it?? (Cost to develop = estimated time to complete * what you get paid an hour)
Where I work, there are certain people that think internal tools and controls are really cheap to write. Yeah, right... I've got an HTA app (mostly VBScript) that only my team uses. It took me about 3 weeks to write it, costing the company well over $4,000! Again, is it worth the time?
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Hello Everyone
For the DataView.Select Methode i use like this string as a DataColumn.Expression:
string StatSelect = String.Format(ProductName LIKE '%{0}%'", SearchTextBox.Text);
Productname is the Column where to search, but what is if i wanna search for the string in the whole table ( all columns) ?
Thanks in Advance
Jacko
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I would assume that you could simply append them to this using an OR condition.
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there is not another solution? since i dont know always wich datatables user is calling and this is a little bit strange query?
string StatSelect = String.Format(ProductName LIKE '%{0}%'" OR ProductName LIKE '%{0}%'" OR etc....., SearchTextBox.Text);
tought for something like: string StatSelect = String.Format('%' LIKE '%{0}%'", SearchTextBox.Text); ?
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sortexp = "Name LIKE '" + SearchFor + "%'";
dv.RowFilter = sortexp;
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Hello ,
I wanted to use alerts in my WPF application. in C#.net for every control we have AccessibleRole property. Is anything similar present in WPF? I can use any control for 'alerts' (not messagebox ), but grid is preferable.
Regards
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WPF uses the newer type of accessibility that's available on MS Platforms (it's called UIAutomation and it supercedes MS Active Accessibility). Basically, WPF supports automation peers, and the type of the control can be retrieved from AutomationElement.ControlTypeProperty. One warning - this is not a trivial thing to get, so I suggest you read up on it a bit.
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