I have a datatable into which i insert data then display the data in a datagridview.When i want to clear the table and place completely new data in the table, the table still retains the column headers(this is using the datatable.Clear() method).The table then adds the new headers to the old wh...more >>

Hi, this morning found that my Service had crashed, and the error was "Exception Details: System.InvalidOperationException: The ConnectionString property has not been initialized". I have no clue WHY the ConnectionString wouldn't be initialized as I do not play with anything near it in my cod...more >>

i am writing code to import data from an .xls file into a db using an oledbadapter to fill a datatable. I can access most of the values easily using this method. i do however have problems with a couple of lines in the file. when i access these rows, they do not contain any data. when i look at ...more >>

I would like to rotate pages in a multi-page tiff. Here is my first attempt: <code> public void RotatePageAndSave(int degrees) { RotateFlipType rotateType = RotateFlipType.Rotate180FlipNone; switch(degrees) { case 180: rotateType = RotateFlipType.Rotate180FlipNone; br...more >>

The following code is giving me a timeout problem., no matter what I do I can't send a piece of mail using .net2.0 System.Net.Mail.SmtpClient via port 465 and using ssl, if however I try using outlook or outlook express it works fine.. System.Net.Mail.MailMessage msgMail = new S...more >>

OK. Can somebody explain why a windows service, when compiled in Debug mode, has no problem starting an executable program in one of its methods and the exe does what it is supposed to. But, when the service is installed using installutil the exe fails. Why might that be?? Thanks....more >>

Hi, I have been working for several months on a sofware and now it is finished. I have a problem now and it is this: Because I live in a country which there is no copyright law in it (Iran!!!!). As soon as I give the software to some customers, the software will be copied illegally and I don't...more >>

Greetings, I have an app that uses HttpWebRequest to download a rather large file (100 MB). I have a while loop set up so that it reads 4096 bytes at a time from the ResponseStream() until it reads zero bytes. The odd thing is that for some of the people using my app, the Read() function fr...more >>

I am trying to get to grips with some basic graphics, being new to C#. I have this code (see below) in a simple project .. when I run it 6 text strings are drawn, as I expected .. but this happens twice .. once with a grey background and once with the white one. Clearly I am missing something fu...more >>

Hi, I am running into problems when performing an RPC call on a COM object via Type.InvokeMember (.Net 2.0 Framework). The exception thrown is "HRESULT: 0x800706BE", which, after some googling, leads me to this MS Support Page: http://support.microsoft.com/?scid=kb%3Ben-us%3B329080&x=6&y=...more >>

Hi guys, I try to adjust columns order in DataGridView via DisplayIndex property and it doesn't work me properly. Here is the code: protected override void AdjustGridColumns() { foreach (DataGridViewColumn clmn in _grdCustomizations.Columns) clmn.Visible = false; AdjustColum...more >>

Hey ..NET 2.0 I'm parsing an XML file and read an attribute value out of a node. This value ( value="0.0000") am I trying to convert to a decimal: decimal _value = Convert.ToDecimal(reader.GetAttribute("value").ToString()); The code above gives this error: "Input string was not in the...more >>

I have a WinForm with two DataGridView controls with drag and drop enabled between the two. I have a scenario where a DataGridView control can have rows dynamically inserted at random positions when a user drags an item from DataGridView A into DataGridView B and MouseUp is performed I perfor...more >>

I'm generating a report on a web site based on user entered query parameters. Obviously, displaying it as a web page is dead easy. Now, they want me to offer a "download as Word" option. (RTF would do as well - There are no tables or other fancy things.) I have no experience binding to Office a...more >>

Hi, I have a class that has 3 different constructors in it. In the base constructor I want to have it set some default data. I don't want to have the overloaded constructors do these same operations (event to the extent of creating a function that each constructor calls). Is it possible t...more >>

Hello, I have a problem for Deserialize some xml file. Some files do not necessarily respect case of the elementname. how Deserialize with case insensitive ? my code : [Serializable] [XmlRoot(ElementName = "DATA")] public class DossierQuery { private string _code = ""; [Xml...more >>

--------------------- This question has already been posted. I got a tip to use [NetDataContractSerializer] and also get rid of svcutil.exe. However, I still want to understand why it does not work the "official" way. previous post: http://groups.google.com/group/microsoft.public.dotnet.general...more >>

I want to write a C# application that communicates with external hardware using ethernet. Can anyone help me get started as I have done some research and I don't know where to start!? Any useful web links / books / examples would be fantastic. Thanks....more >>

I have a binary serialized file on the client box. I would like to open it with a completly different program to see what is in it. I copied the the serialized class information from the project which created it to a new project which will open the serialzed object. When the program ran I got a ...more >>

Hello: I am trying to find what is the very best approach to business objects in Windows Forms. Windows Forms presents an awesome opportunity to use DataTables and I would like to continue doing so. I have worked with dynamically generated DataTables with customized DataRows. However, these...more >>

I wish to invoke the Microsoft.VSDesigner.Data.SQL.Design.SqlConnectionStringEditor dialog in a property at Runtime. This would be made available to clients to edit the connection string. However this is only a design time feature. Is there a workaround for this?? ...more >>

Hi I have designed simple assembly ( *.dll - version 1.0.0.0 ) and registered it in GAC. I have also compiled new version of this assembly - 1.0.0.1 and also added to GAC. Then I've created simple console application and added reference to assembly 1.0.0.0 by pointing the file in "Browse" t...more >>

Online Shopping Hello http://www.shoessuperstar.com/ Founded in 1998, Shoessuperstar Co., Ltd. has become a professional and credible export company from china. We can provide you DROPSHIP Service and accept PAYPAL payment whic...more >>

1. Why arent't default parameters accepted? Why do I have to use polymorphism everywhere? This makes my code redundant. Example: public string showStuff (string whatToShow, int limit = 0){...} instead of: public string showStuff(string whatToShow){...} public string showStuff(string whatT...more >>

Hi, I would like to know the syntax in C# of getting a few colums in Excel through range e.g, I want the 45 to 50th column, what will be the syntax? sheet.get_Range("45:50", Missing.Value)? But I guess that just give me row 45 to 50 instead. I know I can do sheet.get_Range("B:K", Missing...more >>

Hi, In my application design I'm stuck on the following problem: I have an application that will both be web as well as WPF/WCF based. Both are essentially the same, only the platform is different. Both share the same database and both will be totally localized to currently 3 languages. The loc...more >>

Hi, i'm trying to use lazy loading with Linq to sql and related objects seems like you can only call the child object if the context is still open, this is not real lazy loading. here is my actual implementation my class product has a categories collection (using a one-to-many relation i...more >>

Hi all I have a class that implements the ICloneable interface whereby the Clone() method returns MemberwiseClone(). One of the elements of the class is an array and although the Clone method appears to work, if I call a method that then adjusts the members of that array on the new class, t...more >>

Hello, I want to write my own controls for using the ExtJS librarry (http:// extjs.com/) Nearly like it=B4s done on: http://www.codeplex.com/ExtJsExtenderControl/ Does anybody know a good tutorial or webcast about writing controls, especially for writing JS-Wrapper classes? Regards, M...more >>

Hi Everybody! I have the following problem: from the application mainForm the user can do several operation Some of them are password protected (the password is a code that change everytime on the basis of a reference code) so when the user click on a menu in the main form, the passwordFor...more >>

I need to display a MaskedTextBox that has 2 different prompt characters. Is this possible (maybe using the MaskedTextProvider)? If so, can you please show me an example on how to do it. Many thanks...more >>

hi all........ can any body told me,how we use Classes & stored procedure in c#. thanks in advance...more >>

Hi, I have webservice which holds a static variable. I send my first message into the webservice and the static variable gets a value. If I queried the webservice at a later time (say after 1 hour) would the static variable still hold the same value, or would the code be re-initialised and th...more >>

I understand the concepts and rules for invoking UI methods from a non-UI thread. In the past I have always checked with the control's InvokeRequired property and Invoked my delegate accordingly. This has worked fine, nothing special. BUT, I am now working on my first client/server app an...more >>

Hi.. i want to create an application which will connect with Visual Source safe and return me back the latest copy of a project. Plz help me its urgent.... Thanx in Advance...more >>