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AsheeshS wrote:
I am using Task Scheduler (which is written in c#) class library by David Hall
You should post your question to his web site, not here.
Mazy
"I think that only daring speculation can lead us further and not accumulation of facts." - Albert Einstein
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Hello Mazy,
Can you please tell me his web site.
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I don't know it. If it is one of codeproject pages you can search for the author , otherwise use google to find it out.
Mazy
"I think that only daring speculation can lead us further and not accumulation of facts." - Albert Einstein
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You downloaded his library. Check your history if it wasn't that long ago.
Microsoft MVP, Visual C#
My Articles
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I Think, i am using updated library (updated by Dennis Austin) dated 5 Nov 2002. If it is not updated then please let me know from where i can download updated one.
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Again, you download it and we're not familiar with it. Find and check his site for more information. This forum is for general C# questions and questions about the .NET Framework Class Library. Any questions about specific products need to be asked on the product web site.
Microsoft MVP, Visual C#
My Articles
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Hi all.
I am trying to build the 'Print Preview' sample that can be found in the VISIO SDK samples (under the category 'c# - publishing' in code librarian).
I follow these steps (these steps are exactly the ones indicated in the Microsoft Office Visio SDK Documentation):
quote:
------------------------------------------------------------------------------
In Microsoft Visual Studio .NET 2003, on the File menu, point to New and then click Project.
In the New Project dialog box, under Project Types, click Visual C# Projects, and then in the Templates list, select Windows Application.
Name the project, specify the location where you want to save it, and click OK.
On the Project menu, click Add Windows Form, and name the form PrintPreview.cs.
Double-click the form to open the code window.
Open Code Librarian, double-click Microsoft Visual C#.NET, double-click Publishing, and then click Print Preview.
Copy the sample code, and in Visual Studio, paste the sample code into the PrintPreview.cs code window, replacing the previous code.
On the Project menu, click Add Reference.
In the component list, select stdole and then click Select.
Click the COM tab, select Microsoft Office 11.0 Object Library and Microsoft Visio 11.0 Type Library, click Select, and then click OK.
------------------------------------------------------------------------------
When I try to build it I get an error:
"The type or namespace name 'Interop' does not exist in the class or namespace 'Microsoft.Office'"
This error happens whenever I try to use: "Microsoft.Office.Interop.Visio"
Am I missing a reference? I added the three references indicated in the steps above.
Of course, I installed Visio SDK and also VSIP.
I need for this to be built! What reference am I missing? What am I doing wrong?
Any help will be greatly appreciated.
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You should install the Primary Interop Assemblies for Microsoft Office 2003. If you don't have those installed (and I don't know off-hand if the Visio SDK installs them), then Vs.NET creates interop assemblies for you that probably wouldn't contain the Interop portion in the namespace like that which is included in the sample code.
If you have Office 2003 Professional, these are supposed somewhere on the CD.
What Primary Interop Assemblies (PIAs) are is assemblies created by the vendor (typically) that are associated with the registered, associated COM objects. When you import a COM reference, those PIAs are used instead of creating new ones.
Microsoft MVP, Visual C#
My Articles
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Yes, thanks.
I did so.
Things are better now.
However, I still have a problem with:
AxMicrosoft.Office.Interop.VisOcx.AxDrawingControl
Where is the reference to this one?
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What I am trying now is to compile OfficePlanSample (a Visio SDK sample)
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hi,
i want to to hook a certain msg for a window like moving or sizing, this window is standalone app and i have its handle is there any APIS help me do this ?
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If you want too hook your windows messages of your own application implement IMessageFilter interface and inheit your form from it then use Application.AddMessageFilter to add it to your application and do whatever you want with it.
Mazy
"I think that only daring speculation can lead us further and not accumulation of facts." - Albert Einstein
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no not my own app but an outside app that i have its handle
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You'll need to use a system hook, if nothing more than to inject your code into the other application's process space (since an application doesn't dispatch messages to other processes). See Using Hooks from C#[^].
Microsoft MVP, Visual C#
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hi all,
i am writing a program in c#, and i have run into a MAJOR problem.
i have a 'frmMain' class which contains the GUI, and a 'database' class which handles the connection to the database. the GUI class creates an instance of the database class and calls the 'searchdatabase' method, which in turn wants to add items to a list box in frmMain. however, when i try to do this it tells me that an object reference is required  . help is very much needed on this topic,
thanks in advance,
thewebmonster 
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Okay. It looks like one of your variables is not initialised properly. First you need to determine what is null (in other words what doesn't have an object reference).
A quick tour of some of the debugging features in VS.NET: The watch window and the call stack will come in useful. Re-run your program and wait for it to crash, then you can see from the call stack where the program crashed (you can also navigate up and down the call stack to see what was calling what at the time). In the watch window you can see the values of your variables and objects. Does any of these look like is should contain a value but doesn't. You can also hover over variables and properties in the code window to see their value at the point the program stopped.
If this doesn't work. The next thing you can try is setting breakpoints prior to the fault and stepping slowly through the code watching the variables change and the program execute at a speed you can comprehend. Does anything look like it should happen but doesn't - Like if statements that don't quite work they way you expect etc.
Does this help?
"You can have everything in life you want if you will just help enough other people get what they want." --Zig Ziglar
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
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it doesn't even compile. 
i am using c# builder if that helps in any way possible...
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Did it compile before? From your description it sounded like a runtime error.
If it is C# Builder that is causing this error then I'm not sure I can help as it sounds like the IDE is broken.
However, it may be the C# builder is giving a slightly different error message than VS.NET. What line of code does it give this error for? Have you tried to use a variable before it is initialised?
e.g.
SqlConnection conn;
conn.ConnectionString = myConnectionString; Could bring up an error like this because you create a reference to a SqlConnection object, but you don't actual creat an instance of it. You would need to insert the line
conn = new SqlConnection(); in between the two I've given above for it to work.
Watch out for things like this also:
SomeObject someObject;
foreach(SomeObject currentObject in someObjectCollection)
{
someObject = currentObject;
} because if there is nothing in the collection, someObject could possibly never be initialised and the compiler doesn't like that. The same goes initialisation within any conditional statements. Although it is clever enough if you have construct like if(){...}else{...} with initialisation in both
Does this help?
"You can have everything in life you want if you will just help enough other people get what they want." --Zig Ziglar
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
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it is something like this...
frmMain.listSearchResults.Items.Add(id + " - " + Convert.ToString(myDataRow["name"]));<br />
<br />
and it returns the error<br />
<br />
database.cs(78): An object reference is required for the nonstatic field, method or propert 'VideoLibrary1.frmMain.listSearchResults'
i appreciate your quick replies
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Is frmMain the name of your Form class, or the name of the variable that refers to an instance of the class?
From the error message, it looks like it is the name of the class. And what you need is an actual instance of the class.
You can do this by passing this from the main form class to the database class (I am assuming that the Database class is being instantiated from the form class). Although, from a design perspective, I don't think it is a good idea for a class that deals with the database to get involved with GUI code. (But that distracting from the current problem - So 'nuff said!)
"You can have everything in life you want if you will just help enough other people get what they want." --Zig Ziglar
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
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frmMain is the name of the main class. could you expand on the passing of this because i don't quite understand what you mean.
Also, when you say about the database being involved in the GUI, i don't know any other way because of this problem at the moment. Once this problem is out of the way, there will be a fuctions class or something created with handlers for all the GUI elements.
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this is the implicit object, or the instance of the class from which your code is currently executing. It's, "this" object. This is prevalent in C++, Java, C#, and several other languages. In VB and VB.NET, it's called "Me".
Microsoft MVP, Visual C#
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i know that much  , just what does it mean by passing it to the database class?;P
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If the database class needs an instance of whatever this represents in your context, then you simply pass this to the database class so that it has a reference to that dependent object, something like this:
public class A
{
public A()
{
B b = new B(this);
}
public void SomeMethod()
{
}
}
public class B
{
public B(A a)
{
if (a != null) a.SomeMethod();
}
}
Microsoft MVP, Visual C#
My Articles
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cheers, i'll try that.
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