How to use SqlHelper.ExecuteReader? ...more >>

I have a method that is supposed to export a report to an excel formatted file. When I call this method no file is created. What have I done wrong. Thanks for your help private void setFormatExcel(CrystalDecisions.CrystalReports.Engine.ReportDocument report, Boolean useConstantColumnWidth...more >>

I am trying to move an existing piece of code which use System.Net.Sockets.Socket (.NET 1.1) into something which would use a securesocket. I have managed to use the SecureSocket made by http://www.mentalis.org/soft/projects/ssocket/ when making direct connection to a server, however I do ...more >>

I have just completed my first application and it's ready for deployment. Can anyone point me to a site which will explain the different scenarios to consider during deployment, such as whether or not to deploy to a central server and let the clients consume it, or how to set the path to the ...more >>

Hi, I'm using asynchronous sockets for my server. Whenever a client disconnects (either "legally" or suddenly), the server code "explodes". I get the following error: An unhandled exception of type 'System.NullReferenceException' occurred in system.dll Additional information: Object re...more >>

I've noticed in the app.config file, that there is a place to copy the manifest.xml file from the server down to the local drive on the client. (<XMLFileDest> </XMLFileDest>) However the manifest.xml file contains the private key doesnt it? Is it a good design to have the private key downloa...more >>

I am having trouble deciding the best way to handle DateTime objects in communications between various systems. We have systems deployed in multiple time zones, so standard SOAP formatting is causing me some trouble. My scenario is that I treat DateTime objects as an instant in time and leav...more >>

All - I'm curious to know how others are handling events that need responded to across machine boundaries. In my situation would like the events to happen asynchronously also. I've seen that using Remoting + events is not the most stable solutions. I've also heard about using LCE or UDP fo...more >>

I am a new developer in an academic environment working on a project for graduation. I appreciate any help anyone can give me! I have tried to use good programming techniques and split up my application into different tiers: Win (windows client), WS (web service), DAL (data access layer),...more >>

We are currently working on a new piece of software. It is coded in the .NET enviornment using C#. We will be running this software via ASP for our customers. My question is if a customer wants to have access to the database for possible report writing....how do we give them access via the ...more >>

Hi ! I have to develop an accounting soft solution. For many reasons we decided to use a three tier architecture. The logical tier is composed of logical components and a web service facade that delegate to the logical components. The presentation will be composed of both a widows forms applic...more >>

Hi, The UIP documentation states, in Chapter 4, "Threat: Malicious assemblies are loaded during runtime" And suggests the following: "Specify another resource, such as the SQL Server computer, to provide the configuration information, instead of the traditional ExecutableAssemblyNam...more >>

Hi and TIA, My windows app has the the following structure: Thin Business Entities (loaded with datareader on the DAL) DAL using MS application block for SQL Server Business Logic Layer The Network: 5 Locations connected with VPN The Problem: The performance is unacceptable. 45 sec...more >>

I found that UAB get error when the download include the .exe.config file. Why? Is there any simple cure? Thanks, Ken ...more >>

Hello everyone, I want to develop a secure application in .Net. I am in the analysis pahse of the "security" aspect and one of my requirements is to work in a mixed environment... The Client applications may be in a domain or a workgroup. :-( My server will always be in a domain.... d...more >>

I've completed my first .Net project and I'm having problems getting it to run on a client workstation. The client has the .NET framework installed, I'm using .msm files to install Crystal 9 (full product) and Farpoint spread. I used the setup project to create the setup program and it seems...more >>

I have used UAB in my application which run smooth in win2000. After a little change to my app and moved to a newly installed WinXP Prof SP2 PC, I got the following error in log file while trying to download from a URL. I have successfully done the update using the same URL before. [Downl...more >>

Dear All, Is it a good idea to have a multifile assembly deployed on the WebServer and that gets downloaded via No Touch Deployment. I would like to club a small set of dlls into one dll so that my application does not hit the WebServer everytime it wants to access a function that exists in ...more >>

I'm having trouble creating and consuming a serviced component. I started with a blank solution, added a class library, and created a serviced component class. So far so good. Everything works. Then, I create a strong name, and use gacutil to install it into the global assembly cash, and...more >>

I have a DLL that pings a host via ICMP and raw sockets. It works fine when I am logged in as an admin, but it does not work for a normal user. I get this error: An attempt was made to access a socket in a way forbidden by its access permissions I have found out that this is by design,...more >>

I have a VB.NET app that includes the option for the user to create a new Access DB file for use. On some systems the user gets an error that a required COM component could not be found. The error includes a CLSID but not a module name. The users claim that the CLSID cannot be found in the regis...more >>

I'm hoping someone out there can tell me if there's a way to launch the ConfigurationManager in a new AppDomain. I am trying to use an instance of the ConfigurationManager from an application to read/write a configuration file outside the executing application's domain. I have strong named the...more >>

I have a few questions on how to make sure remoted objects leases don't expire when they are needed, but also are garbage collected when not needed anymore. I believe I have a solution, but would like others' opinions and solutions. Basically, in my programming model, any node that remotes an...more >>

Hi iam looking for a reporting tool for .net windows application. Any suggestion/remcommendation would be gr8. thanx...more >>

Hi, My application is composed of business entities which are in the form of classes instances. Some of these entities contains large arraylists of other entities. These entities are being sent to the client - where the user might add/modify/delete some items in the arraylists. Natuaraly, I d...more >>

Hi, I was experimenting with the ActiveRecord pattern as defined by Martin Fowler for a small project and was wondering the best way to handle associations. Should the parent ActiveRecord object (e.g. Order) contain child collections (e.g. Order.OrderItems), or do you expose methods on the ...more >>

Hello All we have to implement a client server based application in such way that server can process request from 50,000 or more clients concurrently and the server run smooth and roboust even such number of clients request server simultanously. So afte...more >>

Hello Robert, But as far as I know, Application and Cache objects are not accessable in the controller class. I'm managing all the session information in the state object in the controller class. If we need to manage application level objects, what is the right approach. Deepak Use ex...more >>

Hi Do you happen to know if managed code calling into unmanaged code during a COM+ transaction (activity) needs to do anything special? I have a serviced ..NET class calling into a COM (VB6) coclass. Both are marked as “Requires Tx”. The COM component’s data changes are committed even...more >>

Hi, I was tring to perform distributed transactions with Microsoft OLE DB .NET Data Provider with oracle database 9i as backend. It is giving the following error. 'No error information available: XACT_E_TMNOTAVAILABLE (0x8004D01B)' Could anyone help me to figure out why this error is...more >>

for a new large enterprise application starting from scratch with c# , and the clients are c# winforms , do we need to use COM+ services or can we use the new COM+1.5 feature service without components for better performance ? thanks. ...more >>

Hi all, I know this question has been asked many times already, but I still have some questions. We would like to use .net remoting for a new distributed application. I understand that a few options are available for the host part (IIS, seperate NT service, console app...). IIS uses http ...more >>

Just wondering if a Rebuild of the Allocation is required when the global.asax file is modified. I assume so since there is the underlying global.asax.vb file that would need to get compiled into the DLL. I was hoping to implement a fix in the global.asax file without having to re-deploy th...more >>

Hopefully I have selected the appropriate news group for this question. I am currently experiencing the following error: Import of MSDTC transaction failed: Result Code = 0x8004d00e. It is occurring on a multi-tier app running locally on a Win XP Professional machine that has .Net + Sql Server...more >>

Hi All, Im looking for some best pratice advice in the following senario. I have 3 projects in my .Net solution 1. Core Class Library (BusinessLogic and DataAccess layers) 2. ASP.NET Web application (Presentation layer) 3. ASP.NET Webservice (Service layer) My Web application and Web s...more >>

Hi, I'm creating an AppDomain and creating an instance of a class. This works fine unless I use caching, which I need to use. The exception that I get is of type "System.IO.FileLoadException" which message is: {"The given assembly name or codebase, 'MyAssemblyDisplayName', was invalid." }...more >>

Hi, I have to pass large objects (class intances) to SQL 2000 DB. The objects usually contains ArrayLists of other objects (also classes intances). The objects are returning from the client and some of their data was maybe modified by the user. The final update is being done using stored proc...more >>

We're experiencing lots of problems with dtc's on our production servers (2 NLB nodes running the application and a MSCS cluster running sql and msmq). The only reason we're using dtc is that msmq and database access can be put in one transaction. Are there any experiences with the use of dtc ...more >>

I'm investigating ways to transfer DataSets to remote machines. Intuitively it seems like using TCP/Binary would be faster than HTTP/SOAP, but since DataSets are XML internally is there a way to gather the data from SQL-Server and transport it as XML that might be faster than the TCP/Binary r...more >>

Good afternoon everyone. I have a question that probably has a simple answer, but I can't seem to find it anywhere on the Net. I have a DTS Message Queue Task in SQL Server 2000. This task is invoked via DTSRun command line utility, and has two global variables that are updated when run. ...more >>

Is there anybody to tell me how to make the combox.text Read-Only somewhat like the listbox....more >>

I'm working on an application that is very processor intensive, it's doing fuzzy string matches to standardize incoming data against a known data dictionary. I load the data sources into memory and then the CPU just crunches for a few minutes to get the top scored results. I'm considering the ...more >>

I can only imagine I have gone blind looking through the .NET documentation. I have a Windows Service that installs and runs wonderfully. However, I am a loss as to how to set the "description" text on the Service. I have browsed through ServiceController, ServiceBase, ServiceInstaller ......more >>