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can Anyone educate me on the namespace I can use to read excel file data in ASP.Net(C#)
Tanx
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There is no such namespace native to the BCL. You have to set a reference to the Primary Interop Assemblies for Office (XP and 2003), or the Microsoft Excel Object Library (2000 and below), to use Excel in your app.
There is an article demonstrating this here[^] on CodeProject. It's not done is ASP.NET, but it gets the point acrossed.
Warning, using Excel in a ASP server project like this will consume A LOT of resources, is not very fast, and is NOT recommended because Excel will be launched on a PER PAGE REQUEST basis. So keep your use of Excel to the absolute minimum.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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You have to reference the Office Excel PIA (Primary Interop Assembly). For Office XP, you can download the official PIAs from Microsoft from http://www.microsoft.com/downloads/details.aspx?FamilyId=C41BD61E-3060-4F71-A6B4-01FEBA508E52&displaylang=en[^]. For Office 2003, these are installed from the Professional CD when you choose to install the .NET Framework something-or-other (don't remember exactly what the feature was called, but it should be obvious).
For older Offices (or even to support older versions, which are backward compatible with newer versions most of the time, at least for the basic stuff like reading data), you can generate the interop assembly (RCW, or Runtime Callable Wrapper) using tlbimp.exe from the SDK - or even easier - right-click on your project, select Add Reference, select the COM tab, then find Microsoft Excel. When you add this to your references, an interop assembly is created for you.
Then you add the (typically - it may be slightly different) Microsoft.Office.Interop.Excel namespace to your C# source file and begin using.
The classes and their members are exactly the same (to use) as what's documented for VBA (Visual Basic for Applications) within Office. The documentation on MSDN[^] is very lacking, but the local help files for Office (if you installed the developer help files) are much better.
There are several articles about using Office applications in your .NET application both here on CodeProject and elsewhere on the 'net. I suggest you try using the search bar above, or use google[^] to find additional articles.
Microsoft MVP, Visual C#
My Articles
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Hi...I have 2 questions...
1. How i can compile my application that it can run in un .net OS's??
2.when betide a error in my application, show a error message that Continue or Quit ... can i substitution my own error message with that, whithout i want to prevention and definition all of errors maybe betide in my application... ??
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1.
Don't know exactly what you mean here 
2.
To display an error message call the static MessageBox.Show method. It has many overloads which give you the possibility to customize it. See the documentation for more info about that. Afterwards evaluate the returned DialogResult.
The following is only a simple example:
if (MessageBox.Show("This is an error") == DialogResult.OK)
{
}
else
{
}
www.troschuetz.de
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In short, you can't change the way your app is compiled...
Currently, you can't run your application on any OS that doesn't have the .NET Framework installed. Since the .NET Framework hasn't been ported to other O/S's yet, that means you can only run your apps on Windows 98, NT, 2000, XP, 2003, and Longhorn (when it comes out).
There is currently an open source project called Mono that is a Linux implementation of the CLI. The .NET Framework is Microsoft's brand name for their implementation of the CLI that runs on Windows.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I read your article on String Creator recently and now wanted to go back to it....it seems to have disappeared...searching for your name or the name of the app does not bring up the article. Where are you???
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Hi,
I'm just wondering whether I'm on the right way or not. I'd like to create a typesafe collection. The data should be held in an ArrayList for simplicity. For all my collection-classes I'd like to create a base class (say MyCollectionBase) which implements all functionality which is not related to the objects-types contained in this collection. For a start, I thought about something like this:
public class ColBase : IEnumerable {<br />
public ColBase() {}<br />
<br />
public IEnumerator GetEnumerator() {<br />
return mData.GetEnumerator();<br />
}<br />
<br />
public virtual int Count() {<br />
return mData.Count;<br />
}<br />
<br />
public virtual void Clear() {<br />
mData.Clear();<br />
} <br />
<br />
protected ArrayList mData = new ArrayList();<br />
}
So far so good. Now the derived classes support the foreach syntax which is what I wanted. The derived classes have to implement their versions of Add(), AddRange(), Remove(), etc, like (say we have a class called Item which represents the individual items in the collection):
public class Col : ColBase {<br />
public Col() {}<br />
<br />
public Item Add(Item item) {<br />
return (Item) base.mData[base.mData.Add(item)];<br />
}<br />
<br />
public void Remove(Item item) {<br />
base.mData.Remove(item);<br />
}<br />
}
But my Baseclass does not support the [] indexer. How do I have to implement this? Am I on the right way or should this be done completely different?
Thanks for comments...
Matthias
If eell I ,nust draw to your atenttion to het fakt that I can splel perfrectly well - i;ts my typeying that sukcs.
(Lounge/David Wulff)
www.emvoid.de
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Take a look at the CollectionBase. It already has two properties - both protected - to access the underlying ArrayList. It also has On* methods defined that will be called when you use the List property, but they will not be called when you use the InnerList property. This is handy if you want to define events for when the collection changes.
It's a good starting point for a typed collection, since you can define the methods that take a typed object (whatever type you're collecting) and call the explicit interface methods (like IList.Add), so that it appears as a typed collection. Explicit interface methods are how many classes in the .NET Framework Class Library - including classes in System.Data.* and System.Collections.* - appear to take a specific type as a parameter even though they implement interfaces that must access an object.
Microsoft MVP, Visual C#
My Articles
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After you inherit from an interface (ex:IList) that has the indexer try the following.
new public ColBase this[int index] {
get {
return (ColBase ) base[index];
}
set {
base[index] = value;
}
}
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I found really nice collection generator:
http://kristopherjohnson.net/cgi-bin/twiki/view/KJ/TypedCollectionGenerator
it works pretty well, just install it as a tool in VS and you can have typed collection in a second.
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Hi All,
I created an application that navigate over the html pages, saving them. I have found a problem about the conversion from IHTMLDocument2 document to UCOMIPersistFile.
Based on the following code:
IHTMLDocument2 docToSave = (IHTMLDocument2) axWebBrowser2.Document;
UCOMIPersistFile pf = (UCOMIPersistFile) docToSave;
pf.Save(PathMi + "\\html\\" + page + ".htm",true);
After the last instrucción, the applicacion does a click() method on a ancher tag to navigate to the next page, the problem is that de Url of the document has been change to path pass at th pf.save method, and I dont know how can I change it again.
(I have to save using the UCOMIPersistFile class, no other kind of files)
Any ideas ???
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Instead of saving this yourself, you might try invoking AxWebBrowser.ExecWB with OLECMDID_SAVEAS (value == 4) as the first parameter, plus any parameters required by the call, which are documented in the IWebBrowser2 interface documentation on MSDN[^].
Using this, you can have the browser save the page - including (almost - depends on the complexity of the page, but it usually works) all embedded content (stylesheets, images, javascript files, etc.). You can do this with or without a UI. This is exactly the same as invoking the File-<Save As command in Internet Explorer.
The URL of the document is changing because you've changed it's reference to the file you've saved.
Microsoft MVP, Visual C#
My Articles
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Hi,
I have this code:
<br />
private void BuildMaterialsAssembly ( string MaterialsSourceFile )<br />
{<br />
StreamReader srcReader = new StreamReader ( MaterialsSourceFile );<br />
string materialSource = srcReader.ReadToEnd (); <br />
srcReader.Close ();<br />
<br />
CSharpCodeProvider codeProvider = new CSharpCodeProvider ();<br />
ICodeCompiler icc = codeProvider.CreateCompiler ();<br />
<br />
<br />
CompilerParameters parameters = new CompilerParameters ();<br />
parameters.GenerateExecutable = true;<br />
parameters.OutputAssembly = "e:\\jan\\mat\\dllll.exe";
<br />
CompilerResults results = icc.CompileAssemblyFromSource ( parameters, materialSource );<br />
}<br />
The problem is that this code refuses to compile an assembly (DLL), it does nothing. It dosen't matter if the soruce is a regular text file with no C# code what so ever, or a perfectly vaild C# (library) code.
I copied this from MSDN and did a few changes.
What coudl possibly be wrong?
Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!
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problem solved, I need to add asembly refrences.
But, why didn't I get any exceptions??
Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!
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I've created a round button...can someone please tell me how to add embossed effect to this....i mean when i click on the button it functions well but i wanted to get the feel of the button..now it looks just like a picture which works as a button....
Any other advice and articles on Custom controls would also be just great..
Thnx
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!THINK FREE!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Change your pictures to "look" 3D, or your drawing code, whichever your using to show the image of a button. You'll need to change both the button up and button down images.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Is there anyother way to set the default button flat style standard to work...
I mean your suggestion sounds like changing the image or the circle to look 3D....i wanted to know if something can be dont to give it the natural embossed button effect..
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!THINK FREE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Once you dtart supplying your own images, you have to also start supplying your own styles to them. You'd use two images, one for the button unpressed, and another for the button pressed. You can't use the standard styles on button images that you supply. The control has no way of determining where the edges of your button images are.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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C# or JavaME? Which one is better for pocket PC game development?
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A lot of Java games run on mobile devices. but Java is slow,while C# maybe faster than Java. but it needs time proving.
fay
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whatever you want, they both have their pros and cons. C# would be funner though.
/\ |_ E X E GG
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Question Title: Marshalling Return type as LPArray
Author: ranadhir
Points: 80
Date: 06/17/2004 06:41PM PDT
I have a COM client calling invoking a function on a managed library.The interface definition is
[return :MarshalAs(UnmanagedType.LPArray,SizeParamIndex=0)] int[] returnTemperatureAsArray(out int cnt);
When i invoke is from ATL client as follows
long _elem;
long* ptemp=NULL;
ptemp=cpi->returnTemperatureAsArray(&_elem);
I get a runtime debugger error
*********************************************************************************************
The value of ESP was not properly saved across a function call.This is usually a result of calling a function declared with one calling convention with a function pointer decalred with a differenct calling convention.
**********************************************************************************************
I tried invoking the same function from a COM dll,and it works fine.Here is a excerpt from the type libraries (as viewd in oleview)
1.Managed typelib
interface IWeatherSink : IUnknown {
HRESULT _stdcall returnTemperatureAsArray(
[out] long* cnt,
[out, retval] long** pRetVal);
};
2.COM DLL typelib
interface ICheckFunctionCalls : IUnknown {
[helpstring("method returnLongAsArray")]
HRESULT _stdcall returnLongAsArray(
[out] long* pcount,
[out, retval] long** pArr);
};
However if i make the array a out parameter rather than a return type , it works fine.
What is wrong?Is this invocation not allowed from managed code?What should I do to make this invocation succeed?
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COM decrees that you always return an HRESULT from a method or property. Automation clients like VB and, to some degree .NET, translate retvals to return values for you. This can be controlled with the PreserveSigAttribute (although that's for RCWs, not CCWs like you're using here). So your cpi->returnTemperatureArray call should accept an [out, retval] as the last parameter and return an HRESULT (which .NET will for you based on whether or not you thrown an exception, or if you preserve the signature and return an error or success code).
Microsoft MVP, Visual C#
My Articles
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