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Yeah, that's what I'd suggest.
private bool closeok = false ;
private void button1_Click ( object sender , System.EventArgs e )
{
this.closeok = true ;
this.Close() ;
}
private void Form1_FormClosing ( object sender , System.Windows.Forms.FormClosingEventArgs e )
{
e.Cancel = !closeok ;
}
The form will only close due to a click of button1.
(In addition, if you haven't already, set the form's ControlBox = false;)
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Does anybody know of any way to find out which application/process has locked a file?
As an example, you have a file called widgets.txt and when you try and delete it you get a message along the lines of "Cannot delete widgets.txt, there has been a sharing violation, the source or destination file may be in use". The problem is this message doesnt tell you what it actually holding a handle on the file.
I am currently working under the assumption that there is something in the Win API that I can call to get this information, however I am currently at a loss to what it is.
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How is it possible to create and populate an array for the follwing data please?:
Please note that this is just a sample data
AL LME BR IPE CU LME EURUSD
BR IPE 1.0 23 98
CU LME 3 1.0 8
EURUSD 2 76 1.0
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Well, assuming the first row is headers, I'd create a struct that defines the collection of data in each row, so looks like two strings, and three floats, and then make an array of that type.
I'd use the List class, rather than an array.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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i have a DataGrid dbgTest with DataSource = dtA
i use DataView to search some row and display result in dbgTest
anythings are work well.
and my problems is: i want create new DataTable from result display in dbgTest after search by DataView.
Thanks
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I have created an Windows.NET app in C#. with crystal reports.
These all run fine on my development computer. I modified my setup project to
include all the merge modules that CR.NET needs, added the
licence key info. and rebuilt the solution. still everything works fine when
I run the installation. both on Development computer as well as on Client
computer.
later i added an installer class to add the Database path to a config file
during installation
I successfully installed the app. on my development computer.
but when I try to run it on Client system, I receive the following error:
Unable to get installer types in the <app path="">\app.exe assembly --> one or
more of the types in the assembly unable to load.
it seems to be something related to crystal reports.
I am using .NET Studio 2005 and app is on c# with few crystal Reports.
Now if i copy and paste the bin/debug directory from the development system
to my client system, it gives the following error when trying to run crystal
report module:
File or assembly name CrystalDecision.Windows.Forms, or one of its
dependencies, was not found
help appreciated.
thanks in advance.
Rachit Damani.
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(I know you said that you have all the merge modules so just make believe I'm the person looking over your shoulder with coffee breath offering useless advice...)
Under Detected Dependencies is CrystalReportsRedist2005_x86.msn listed? What I would do just for testing is to see if you can build an installer just for the Crystal Reports Redistributable and another for your main app (without the Crystal Reports). If that works then something went goofy in your original installer project (I have to make new ones all the time. For some reason mine get corrupted when I have a new version of the main exe).
Good Luck!
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Dear friends,
Let say I have a connection from C# 2005 to MS Access database and table name "personal", and dataset name "myDataSet". How can I delete a current row record from that dataset also in access database?
Thanks in advise...
memix
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Hello...how can I convert an element from a list into double or integer....I have something like this.......:
totalDemand += Convert.ToDouble(this[j].Demands, CultureInfo.CurrentCulture);
and it gives me an "unable to cast object of type System.Collections.Generic.List'1[system.Double]' to type System.IConvertible'.
and totalDemand it's declared like this:
private double totalDemand;
public double TotalDemand
{
set
{
totalDemand = value;
}
get
{
return totalDemand;
}
}
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What kind of value does this[j].Demands return? Convert.ToDouble expects either a string instance or an object that implements the IConvertible interface. According to the error message, this[j].Demands returns neither of them.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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this[j].Demands return double....how can I convert it to string or IConvertible?
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If this[j].Demands already returns a double, there is no need to "convert" it to a double.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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it's about a double and a list of type double...
I wrote something like this :
totalDemand+=this[j].Demands; but it give me two errors....
Error 10 Operator '+=' cannot be applied to operands of type 'double' and 'System.Collections.Generic.List<double>'
Error 11 Cannot implicitly convert type 'System.Collections.Generic.List<double>' to 'double'
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Obviously Demands does not return a double but guessing from your comments a list of doubles. Maybe you wanted to write totalDemand += this.Demands[j]? If not, it's probably time to show some more pieces of your code.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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Now the problem is that totaldemand is always equal with 0.
The List Demands is making part of the class CityDemand
private List<double> demands = new List<double>();
public List<double> Demands
{
get
{
return demands;
}
set
{
demands = value;
}
}
And this part of the code is in a Class named CitiesDemand
private double totalDemand;
public double TotalDemand
{
set
{
totalDemand = value;
}
get
{
return totalDemand;
}
}
public void CalculateCityDemands(double totalQ)
{
totalDemand = 0;
foreach (CityDemand citydem in this)
{
citydem.Demands.Clear();
for (int i = 0; i <= Count; i++)
{
citydem.Demands.Add(citydem.VehicleQ);
for (int j = 0; j <= i; j++)
{
totalDemand += citydem.Demands[j];
}
}
if (totalDemand > totalQ)
citydem.Demands.RemoveAt(citydem.VehicleQ);
}
}
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this[j] runs the indexer on this class. Demands, which it is returning, appears to be a list of doubles. That makes sense, it's name is a plural.
So, totalDemand += this[j].Demands[0]
would work, assuming the list is not empty. Which item in the list do you want to add ?
Convert.ToDouble won't work on a list ( how can it ), and is not needed on a double.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I think the problem is because it'n not adding me something into the list. I dont know exactly, but I have a kind of error like this :
"Index out of range. Must be non-negative and less than the size of collection ".
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That means that you're using an array and not a list class. And you're trying to add past the size of the array. Like the error message says.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Dear all,
This morning I encountered a problem I have never had before. I created a project a few weeks back with the namespace CookBook. It compiles and runs just fine. This morning I opened another project with a different namespace. Compiled it, and this project runs fine too. My sick mind thought it would be nice to combine the two projects, however ... two different namespaces. So I imported the second project in the solution of my first project and changed the namespace of the second project to match the first. After changing the namespace, the entire solution compiles fine. I then wanted to refer to a class inside a form in the second project. Since both projects have the same namespace, you would expect the classes in the second form ( with the changed namespace ) to globally show up as CookBook.[class].
However , this is not the case. It simply tells me : No reference , etc during compilation. Can anyone explain to me , what I am doing wrong. I would like the entire second project to be a part of the first project so I can call classes from inside both forms. The projects are pretty large, so importing the forms ( add existing Item ) into the projects is not an option. Do I have to rebuild the class library somehow ( and if so , how do I do that ? ). I'm using VS2005.
I highly appreciate any input. Kind regards, and many thanks upfront !
Cheers,
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i think you have two projects with the same namespace in your solution.
in VS2003, (i don't have VS2005 this would create two separate .dll library files containing only the functions defined in their respective project files.
so, if you want to use the function from the second project, you will have to import that file and not the first one.
If you want ALL in one file then just combine the two projects together which when compiled will result in a single library file. there may be other methods but i don't know them
i don't know how it works in VS2005, i'm sorry
regards
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Having two projects inside the same solution does not make them know anything about each other. In order to use the classes, interfaces, etc. of one project, it has to be referenced by the project that wants to use the stuff. Now that the second project knows about the first one, you can access all things declared public in the first project independent of their namespace.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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Thank you for your kind and swift reply. I was under the impression that importing a project into a solution automatically meant that they know about each other. Obviously not. However, how can I reference a complete project ( or the namespace for that matter ) into a project.
using CookBook; at the top of the form is still generating the same error during compilation and so is using the complete name ( namespace.class.method ).
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Inside the project explorer right-click on "References" and select the "Add reference..." option. In the dialog that opens that should be a "projects" tab.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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