Hi, in my catch(SqlException se) block, how can I tell from the value of SqlException members (e.g. number, state etc) that the exception is due to fail to connecting to database? there are a block of codes inside my try{ }, including define SqlCommand, assign values to SqlParameter, open connection...more >>

Hi, I created a .NET ClassLibrary written in C# Could a asp classic application use this dll? If it could, what would I do to register them? Regsvr32 returns: "createThumb.dll loaded, but DllRegisterServer-Startpoint could not found" ( translated from german error message). thanks in ad...more >>

This statement [1] will not compile... localhost.Customer cust = new localhost.Customer(); The build error description is "The type or namespace name 'localhost' cannot be found." I understand the use of the term localhost when not used within code but when being used within this code to ...more >>

Hi I am running a service on remote machine A and executing some code on same machine from local machine that is machine B. I can create all kinds of objects on remote machines and execute different methods on same. But if there is some exception on remote machine then I am not able to catch it on ...more >>

Friends, Coming from vb6 I used .ini files to put in somem configuration issues for my application. Although the structure might be know to you, here is an example [General] ShowNetprices=1 useBarcod=0 I used to read these with some Api related read and write profilestring function ...more >>

When a user clicks on a comboBox dropdown, I want to close the dropdown and do something else (such as open up a form). How can I programmatically close the dropdown? Thanks, Glenn Posted Via Usenet.com Premium Usenet Newsgroup Services --------------------------------------------------...more >>

Hello, Let's say I have a class A, and classes B and C that inherit from A. I want to save the content of B and C into a file and read it afterwards. Is there a way to write streams of a specific 'type'? I mean, create a StreamWriter of 'class A' type. thanks! --- Outgoing mail is cer...more >>

I have a form (no titlebar) with only the MonthCalendar control. If the user clicks anywhere outside of the window (and the area within parent window) I want to close the window. How can I do this? Thanks, Glenn Posted Via Usenet.com Premium Usenet Newsgroup Services ----------------...more >>

Hi all Pro, Are there any body know how to execute store procedure from .cs file? any help is greatly appreciated. Thanks you in advance. Kate ...more >>

Hi, everybody! I writting a COM+ component and get this exception every time when I try to run my app. I debug and check my code now and not found any mistakes... Can anyone help me? COMPlusExceptionCode is -532459699 -- WBR, Roman S. Golubin PS: Sorry for my english ...more >>

Hi, I have a question on regard to Monitor.Enter(..) and Monitor.Exit(..) I'll start with an example : public class test{ private static Queue q = new Queue(); public method testMonitor(){ lock(q){ // do some operations on q Monitor.Enter(this); ...more >>

How to get the task name (exe file name) by a HWND? ...more >>

I am trying to access .net assemblies not in the current program directories. Those assemblies are not in GAC. In Java, I just have to make sure those classes(jar files) are in the directories of libpath.Do we have something similar in .NET? If not, how can I access assemblies not in the current...more >>

I would like to create a user control to mimic DateTimePicker. I don't like DateTimePicker because it doesn't allow entering blank date without having a check box. I like only the calendar dropdown portion of DateTimePicker. On my user control, I have a regular dropdown control. On DropDown e...more >>

Hi, lets say that i have the following XML: <header> <version>1.0.0.0</version> </header> <queuename> DXRMTest </queuename> I want to code something like this: string xmlVersion = foo.GetValue( "header/version" ); Is there a way to do this in .NET: XmlReader, XPATH, ...? ...more >>

I found this code from ElreyRonald. It is a console but works by referencing another website. //-------------------------------------------------------------- // A console application to print IP Address of the current // workstation (or its router's IP ) // // Two things are demonst...more >>

Hi, is there a function wherby I can find a find a thread by its name. For example, I want to get hold of a class referance for a thread named "My Thread". I woudl like some code that looks like this... ClassName myClass = Thread.FindByName("My Thread"); Basicaly I want to be able to do thi...more >>

Hello, here's the situation: I have a query that returns 2 columns of data from a table. This data is loaded into a typed dataset (DS). I display each column's data in a text-box in ASP.NET. Now, I dont want to have to save the DS or its corresponding dataadapter in session or viewsta...more >>

Hi, I have a unmanaged c++ dll, and want to call a function "dlltest(mystruct a)"of it. The Parameter mystruct is a struct which consists of a array of strings: struct mystruct { char * myArray[100]; } I searched the net for on hole day, to find a way to marshal this. I have tried th...more >>

can you help me? I know that that function create an array has 2 colums but then what should I do? Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- ** SPEED ** RETENTION ** COMPLETION ** ANONYMITY ** --------------------...more >>

I need a config file to keep connection strings used by the business rules tier. The web.config would work when the module was used with ASP.NET but not when included in a Windows Application. Is there a config file (and associated .NET access methods) that is associated with a given assembly? ...more >>

How can I perform such thing using Regex? I need to catch numbers comes after "Word1" or "Word2" Something like this: Word1|Word2(?<TEST>\d) Strings: wrtsdlfgkjsdlkfgWord1332233sdfglkjdslkfgjsldkgjWord22344sdfoisdfkjgh This should catch : TEST:221122,TEST2344 PLZ help ...more >>

I built a socket server that is able to connect clients and echo the message included woth the client request to connect. I haven´t been able to make the server listen for further messages. This is the loop where I'm suppose to make the BeginReceive call... Does any one know how should I place th...more >>

Dear C# Gurus I'd like to implement a function with several optional parameters, (all of them are boolean value) In perl, you can write the function as $obj->Func({'OutputXML'=>'on', 'OutputSQLScript'=>'on', 'OutputToFile'=>'off'}) Is there a way to implement a fuction with parameters easy to ...more >>

I have a column in MSSQL that is of type "Text". When i write an xml string in it, it automatically adds a "?" in front of this string when it inserts in the database, although it is not part of the string that i am writting. Using the same code, when i write to the Access database with the col...more >>

hello, i've noticed that, when a control is disabled, its tooltip doesn't show up anymore; is there a way to show the tooltip even if the item is disabled? Thank you, Daniel ...more >>

Hello, In my application I have three container classes (custom business entities): Order, Customer, Order Details. Each class has CRUD behaviors where it retrieves, updates, creates... by interacting with a MSDE DB. The application allows the user to input data in multiple forms from there ...more >>

Hi , I've create a panel that draws a gradient in the OnPaintBackground event but when I place a number of those panels on my form ,I get the following error : " At least one element in the source array could not be cast down to the destination array type." Also when I minimize/maximize my ...more >>

Hi, the following statement takes around 1 second (!) to execute on my machine: string progName = Process.GetCurrentProcess().ProcessName; Why is this so terribly slow? This is a major pain for me because the program is invoked repeatedly as part of a build environment. The upshot is tha...more >>

Hello... if there's some system or .net functions that can list me directories tree like in winexplorer? i mean... is then "Desktop" is root dir, and then "My Computer" and "My Documents" under... thnx... ...more >>

Hi All, I am using a datagrid to display a table. Based on a query I want to highlight few records in the datagrid at the same time I want to show those records which does not satisfy the query as un-highlighted. Any clue on how to do this? Thanks for your time and help. Regards Anand...more >>

Hello all, I want know when a node is added or removed from my tree so that i can update another structure automatically. Is there an event that is fired when a node is added or removed? Thanks, SN...more >>

Interface Problem The following code in Listing 1, compile successfully, but if we change the class "CTest" as Listing 2, then the code is not compiled. Also if we change the class "CTest" as Listing 3, then code again compiles. Can any body explain it. Listing 1 /***************...more >>

How do I capture matched text when using Regex.Replace? I have searched the newsgroup for an answer but can't find one. For example, suppose I want to remove all digits from the beginning of a string and print out the digits that were removed. I have several options: (1) Call Regex.Match...more >>

Hi. I have to ask this question once for all; Is there a good rule for when to use a switch statement rather than an if statement? I know if statements is faster in small tests, but how many if-elseif's are considered a maximum before it is recommended to use a switch statement? Thank you. ...more >>

Hi, I'm supposed to write a class to do search (using XPath queries) into an XML file, also capturing attribute information & elements + ability to modify information too. Here is my question: Can I create a class which contains System.Xml and XmlTextReader + XTextWriter classes ? I mean, do...more >>

I'm trying to convert the following struct from C to C#, but have a problem with the two pointers that point back to the same structure. struct BSP_Node { byte axis; float plane; BSP_Node *left; // ARGH! BSP_Node *right; // ARGH! bool leaf; Object *objects; }...more >>

Hi What is the best way to capture scroll events (especially while dragging the scroll box) in a ScrollableControl with the AutoScroll property set to true? I've been thinking of using WndProc, since it receives a WM_VSCROLL msg, but even in here, how can I use WParam to get relevant info Thanks...more >>

Dear All Can any body help me in drawing charts in windows application using C#. --=20 Regards Mohamed Afifi Web Developer Bridgemont Holding Company www.alqanat.com =20...more >>

Hi all, I'm a C# newbie and need some help I have a small program that connects to Active directory. I use two forms and in the main form i have a class that searches for security groups and writes the output to the textbox on the main form, This works perfectly But when i call the same cla...more >>

Now... I have a file "c:\test". I don't know if it's a file ora directory. I can't instanciate FileSystemInfo because it's an abstract class. What must I do? Instanciate a DI, check if it's a Directory and if it isn't instanciate a FI? Is there a better method? OR I could parse the filename...more >>

Why does C# require an escape character (or the @ symbol placed in front of the string) when a string variable contains some *special characters* - as in the sample code below. Other languages let you put anything you want into a string without escaping. What's the deal with C#? string strFile...more >>

Hi.. After I sent that message I realized you can do something like foreach statement below to get to the children.. .. I'm still curious how people handle this though.. thanks.. John foreach(DataRelation myRelation in dataset.Tables[x].ChildRelations) {}...more >>

How can I get a bitmap file header and header file info, Is there a namespace for this or is it simply file parsing? -Lou ...more >>

Hello all Since I'm just starting with C#, maybe I shouldn't be trying to apply MFC; i.e. 'extern'. What I want to do is write an C# app that I can take from a developmental PC, put it on a production PC and run it. If any problem occurr, I would like to look at a log of the app and see wha...more >>

I'm needing to reflect on classes to find any fields they may declare of a certain type. However, the MemberInfo objects returned by Type.FindMembers do not expose the field's type, to my amazement. Now the MemberInfo object returned in this case is actually of the more derived class RuntimeF...more >>

How can I get the application path ? ...more >>

I am trying to write a telnet emulator. I followed the example code for EndRead, but when it gets to the last line (in the code below) I get a NullReferenceException error. Any ideas? Here's the code: Private Sub myReadCallBack(ByVal ar As IAsyncResult) Try Dim myNe...more >>

How can i display all items in an array if the array consists of 1 column and 5 rows , table name is systems...more >>

I would like to pass the selected date value from calender to text box how can i do this help will be appriciated ...more >>

Hi, I've just switched from Delphi to Visual Studio and I'm wondering how to use enumerations in loops. In Delphi you declare the enumation as TMyRole= ( wrSystemNet=1,wrPrivateNet,wrWarnestamNet, wrFamilyTreeNet ); and this can be used in a loop as role: TMyRole; for ...more >>

I have a text fil with foreign characters I need to import. I read it using this: StreamReader sr = new StreamReader("@import/user.dat", System.Text.Encoding.GetEncoding(850)); while(sr.Peek() > -1) { string myLine = sr.ReadLine(); myLine.Replace("ø", "&#248;") // Just an example...more >>

Hi All! A simple question; what is the C# equivalent for Beep() in VB? And how can I use the system sound from C#? Thanks in advance! /Leif Andersson...more >>

I am creating my own exception handling class derived from Exception. It is used to handle tcp connection. Whenver connection failed, it throws an exception. My question is: How do I make my exception class to stop further exception from being re-thrown after the errror is handled/processed ?...more >>

Hi, How I can to design one User Control, which contains other controls like Label and TextBox, in order to it to return, in to the form that contains this, all changed properties, from the user control, but also and from the included controls? Thanks. ...more >>

Is there a way to set the singleton object isntance to null? I have tried it and it does not work. SingletonObject singletonObject = SingletonObject.GetInstance(); singletonObject = null; Thanks ...more >>

Anyone have any code examples on how to shut down the system or info on what namspace and class to use? Thanks gv ...more >>

if I have a Collection, and I assign it to the DataSource Property of a Datagrid, the data grid shows all the public properties of the items in the collection. How do I: 1) only show what I want shown, without making properites non-public 2) give the columns differnt captions than the...more >>

Hi All, I have a problem with a windows service. It seems to run happily for sometimes hours, checking a database every second. It uses a timer and in the _elapsed event, the timer is stopped, the processing is done, and the timer is restarted. Errors are logged to the Event Log. I don't...more >>

How can i access controls from a form from other class in a class library?? []s......more >>

HI.. I´m doing a program that a search a string that you type in google and return the links that it find The problem is that i need the regular expression string to use on the results page to extract the links Can someone help me in this......more >>

Hi I have been trying for quite a while to get this code running FileStream file StreamWriter fileWriter; string programName,pscoastArgs,programName2,psxyArgs string pscoastOutput,psxyOutput programName = @"c:\gmt\bin\pscoast.exe" pscoastArgs = @"-Jq-95/1:52000000 -R-130/-50/...more >>

I have noticed a bunch of posts regarding the use of the Excel COM object regarding the Excel process never dies. I noticed them because I also had this problem. I was ReleasingComObject from Marshal on all Excel Sheets, WorkBooks, And Apps. ** while (Marshal.ReleaseComObject(myobj) > 0); *...more >>

I have an API call function which return a pointer of C++ class object. I need the m_pData and m_lSize in the object CReturnClass *APIFunction(void) 1. Could I directly use this API function in VS.NET by using DLLImport Declare? I don't want to wrap this dll in C++ 2. If yes, How could I Decal...more >>

Is it possible to send the CTRL+ALT+DEL keystrokes programmatically in a C# program? *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

1. How can I read/write data from app.config ? 2. Where are suppose to placed the app.config and application exe file in the users's PC, in the same directory ? ( in my VS solution the exe and the app.config are not in the same directory that's why I wonder how they will be deployed/copied/in...more >>

Is there a penalty using 'this' to call class methods? I like using 'this' because it shows me what is in my current class. Does it matter to .NET that I use 'this.myMethod()' instead of 'myMethod'?...more >>

Efficiency on Loops Using Class Variables I have a loop that has a large loop e.g.System.Math.Pow( 2, 20). I check a local variable against a class variable inside this loop. // if ( localVariable > classVariable ){} Does .Net perform better(faster) if I assign the class variable to a loca...more >>

Resource files are compiled into the assembly, correct?? When XP first came out everyone was using tools to read the resource files within a .dll and changing them - then "recompiling" the changes to manipulate the welcome screen. Do .NET assemblies for the same way? Could I get a tool to read...more >>

Does anyone have a sample or know how to sort a two dimensional array? I want the first dimension ordered by the second dimension. Meaning Array 1,100 1,299 1,-100 2,200 2,400 3,599 3,-101 sorted should result in 3,-101 3,599 1,-100 1,100 1,299 2,200 2,400 ...more >>

We know c# don't support multiple inheritance, and that can be suplied using Interfaces.. But I have a doubt, what is the diferences between and abstract class without not virtual methods, and an interface? And where can i find some information about the implementation of both of them...more >>

I am a newbie programmer. I am working on a small program that fills a dataset based on one field in the table I am working with. I am able to fill the dataset, but not sure how to call my Crystal Reports form that I have already made in the same project. On my main form I have the following ...more >>

hello all, well a problem arose and i kindy ask for console: when i compile my solution i get this: Error: The dependency 'GDH.Infra.Settings, Version=1.0.1538.21971, Culture=neutral' in project 'GDH.Infra.Security' cannot be copied to the run directory because it would conflict with de...more >>

Hi, I have a simple program with no multithreading that would update the database at the same time But when I run it it gives me this error: "An unhandled exception of type 'System.Data.DBConcurrencyException' occurred in system.data.dl Additional information: Concurrency violation: the Updat...more >>

When I develop forms on my Windows XP system they look fine when the .exe file is run on the same system, but when I run them on other Windows systems like Windows Me, the forms look all wrong. How can I develop forms that run and look good on both the XP and Me operating systems. -Harry ...more >>

Hi, I have a windows datagrid with a style and some fields... for one field I have declared one event and it works fine, the problem is when I need to check or change others datagrid or the one,... .NET overwrite my code and I loose it! I wrote the event of the datagrid field a lot of times toda...more >>

If I have a class that implements IList. This puts all the add / remove etc.. methods in but they are all private as in int IList.Add(object value) This is a problem because I want it to be public but when I try public it says Modifier public not valid for item. What am I missing? JB...more >>

Is there any way to build Outprocess (EXE) COM server in C#? The only examples of interop I found are Inprocess (DLL) COM servers... Thanks, Slava Gomzin Senior Software Engineer Retalix Ltd. slava.gomzin@retalix.com http://www.retalix.com ...more >>

Hi Any one come across adding drop down lists to Excel sheet at run time I can do this in VBA using the following cod ActiveSheet.DropDowns.Add(144, 0.75, 48, 15.75).Selec what is the equivalent code in VSTO or C# Thx in advanc Ram ...more >>

SGVsbG8sIEFsbCENCg0KSSd2ZSByZWFsaXplZCBzb21lIG1hdGggYWxnb3JpdGhtIGluIEMjIGFu ZCBNQysrLiBUaGUgZmVhdHVyZSBvZiBpdCBpcyBhbGxvY2F0aW5nIGEgbG90IG9mIG1lbW9yeS4g U28gdGhlIHByb2JsZW0gaXMgdGhhdCBDIyB2ZXJzaW9uIHdvcmtzIG11Y2ggZmFzdGVyIHRoYXQg TUMrKyB2ZXJzaW9uLiBBbmQgZXhlY3V0aW9uIHNwZWVkIG9mIE1DKysgYXBwIGlzIH...more >>