Hi, I am just getting used to using C# to create GUIs for scientific apps (I have been using Fortran for several years). I want to create an application that allows a user to draw a flow chart like schematic that will then be used to calculate thermodynamic properties. Is there a good book o...more >>

I'm having trouble encrypting/decrypting a simple string using the System.Security.Cryptography.TripleDESCryptoServiceProvider, etc... The encryption works, but the decryption does not properly decrypt several of the first few characters. Here's the code: class TMyCipher { public str...more >>

Hello, Does anyone have any thoughts on copying graphics objects to the system clipboard? Specifically, I have a simple class that contains a GraphicsPath, a Pen, and Brush object. I'd like to be able to copy an instance of this class to the system clipboard and retrieve it later. Un...more >>

Hi to all, i try to modify my network params dynamically. I can't manage to do it. does smbdy knows what i'm doing wrong ? string[] temp = new string[1]; ManagementObjectSearcher ms = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration"); ...more >>

Hi! For my current application I'm looking for a four-way-(cross) splitter control (as often seen in 3D-editors). The .NET Splitter-class is (IIRC) only a two-way splitter. Does anyone know such a four-way-splitter control? Regards, Andre Loker ...more >>

Hi, The code: class Row { public int m_Id; public string m_Name; public Row(int id, string name) { m_Id = id; m_Name = name; } } class Table { public ArrayList m_Table; public Table() { Row row1 = new Row(5, "hello"); Row row2 = new Row...more >>

If I have a base class that is derived from many classes, and I want to make all the classes serializable. Is there a way I can do this from the base class or must I add [Serializable()] to every class, even if it's parent class has the [Serializable()] attribute. I'm thinking no from what I've ...more >>

Hi, all I am looking for a decompiler for C# for personal use. Can anyone introduce some non-comercial decomplier here? Thanks in advance. Tony ...more >>

Hi Can you please help with some info on how to open existing word documents / merge two word documents from a C# program ? My user will select 2 or many word docs and i have to create a c# exe which add all word docs to one word document. Thanks in Advance Maheshwari ...more >>

any free md5 class available for getting the hash for a given string ...more >>

Why, oh why is it necessary to test an event for null before raising it? Why isn't that case handled automatically, instead of forcing developers to write three lines of wasted boilerplate code every time an event is raised: if (SomethingChanged != null) // wasted code { ...more >>

I started an unmanaged VC++ dlg app that I want to play arround with socket for Peer to Peer app on my local LAN and I got it connected up the the app is the same on both computer and creates a listener socket, one(1 Max user for now) Server socket connection on acception of listener, and 1 clien...more >>

Hi everyone, Here is my problem: I have the following classes: - DataNode - this class is designed to hold some data and will be contained in a tree like data structure DataTree. When DataNode is changed, it raises "Changed" event. The class has a reference to the DataNode it is being cont...more >>

Hi. Is there a way to make a datagrid display the word "Null" (or something similar to that effect - as long as its not just a blank) in the corresponding cell whenever the data value of particular (row, column) is set to null?.. There is no guarantee that the "type" of the column is a string. I...more >>

Saw a term "global scope in a program" so where is this global scope and I guess that brings up the question where can I find the the definition of the layout of a C# program like: using System; namespace class 1 class 2 main etc ...more >>

Hi, In our application we need to have a high performance scheduling framework. We want to be able to say for item 21 do an update on such and such time. We will have around 1 million items of this kind with different scheduling time, so not all will be updated per hour. Some will be per hour ...more >>

does anyone know the height and width of a Win32 messagebox, with and without an icon? thanks, John...more >>

Hi all, I'm opening an xml file in c# and storing it in a dataset for use inside a datagrid (Windows application). After, I'm going to modify and print the data. I tried a test print of the datagrid itself and it doesn't look very pretty. I also tried opening the file into Excel and printin...more >>

I have a windows service where I create another appdomains. In the newly created AppDomain, I make use of a C library. If I issue an Abort(1) within this library, it simply hard stop my main AppDomain!!!!!!!!!!!!How could I prevent my main AppDomain to stop when the other stopped?Thanks a lot,Jo...more >>

Does anyone know if there is a XIRR function in the Framework somewhere? Or, if not, maybe a link to something that I could convert into a function.. Thanks ...more >>

I have written an add in to the IDE that fires an event to check for processes that have started up that are in a user specified list. If one of them is found it will attach the debugger to the process. This works great when the client and my server drone are the same machine, but as soon as I...more >>

In my main dialog, which opens when my application starts and never closes until the application completes, I have a list box. My assembly also contains several threads. I would like to write to the list box from my main application as well as all the other threads. In my main applicati...more >>

If I copy or move a file and the file already exisits how do I overwrite the old file or rename the new one ? Thanks in Advance. ...more >>

I can't list the key-value pairs at runtime.The pairs list can not be retrieved. below is what I wrote DirectoryEntry nodeAdmin = de.Children.Find("IISAdmin","IIsWebVirtualDir") // ,nodePrinters = de.Children.Find("Printers","IIsWebVirtualDir"); // IEnumerator enA = nodeAdmin.Propertie...more >>

I am trying to populate DataSets with results from SQL queries. Usually, to that end, the DataSet.Fill method works fine. If however the table includes a character field populated with a space, the DataSet throws an exception. I assume that the restriction is because of the DataSet's use of X...more >>

How do you load an xml doc in C#??? ...more >>

In C-sharp, I wnat to know whether the Component is compiled in Debug Mode or Run Mode through Code. How is it possible? Is there any way to Access the Config file and check? Please let me know with example ...more >>

Hello, Can anyone please help me with this matter. I try to find the interfaces implemented by a class using Reflection. e.g: public class A : InterfaceB, InterfaceC how can I get (the info about) the "custom" interfaces InterfaceB and InterfaceC ? Thank you, Cezar...more >>

Hi, Does anyone know how to get the list of local declared method of a class using Reflection. I didn't see a flag like %IsLocal% for MethodInfo... The code I use now returns all method, locally declared and inherited <snip> MethodInfo [] methodsInfo = cl.GetMethods(); forea...more >>

Hi, How do create fixed length strings in c#, which is possible in VB6.0. i.e. dim str as string*10 Is there anyway to handle this. regards, Mahesh.K ...more >>

I have created a new AppDomain from within my window Service. I need to pass some delegates to an instance of a class loaded in the other appDomain. With the way I currently do it, the delegates get called. HOWEVER, in the second appDomain and not in my main AppDomain. The class that contain...more >>

Hi, Inside my program, I'm trying to call Microsoft.CSharp.Compiler.Compile to compile another c# program. I'm having a hard time figuring out what the syntax is to pass as the lib option. I need to specify 2 directory locations for the lib option. The documentation seems to indicate using ...more >>

Hi All, I want to add a property to a user control with three or four option to select how can I do it. I mean what type it should be to have a combo box type get a combo box selection option. If you take boolean type property it allow the user to select true/ false as the control get added...more >>

I have to use a panel in win form. This panel is hidden at the left and when you move your mouse there, the panel slides in to the form (to right)... Like the VS.NET's toolbox bar at the left... Now I did my panel and set the events. When MouseHover event occurs, it slides in... If I put ...more >>

Hi, Please let me know, In c-sharp, it's possible to use the Same method for using multiple purpose ie Sending More than one Parameter, or Parameter with different type etc without Overloading... ...more >>

I have a situation where I have a method that I need to call. One of the parameters of this method is a string[]. There are potentially several string arrays that I could pass. Based on other information, I can derive the name of the string array to pass to the called method. But I can't fig...more >>

When I press a button, I start a new Exe file as a new Thread. When the mainform of that exe closes, i thought the thread was over.=20 When and How shoud i terminate the subprocess?...more >>

Hello All, This sends an email message OK. But, how do I attach a file? // create server SMTP with port 25 string ServSMTP = "mycompany.com"; string sFrom = "support@mycompany.com"; string sTo = "webmaster@bmycompany.com"; string sSubject = "Subject Test"; string sMessage =...more >>

I'm calling a stored procedure which has an output parameter of type int. Once the stored procedure is executed, I want to check the value of the parameter in case it is null. However, when the a null value is returned I don't seem to be able to detect it. Any help would be greatly appreciated...more >>

I want to send a biztalk document to an aspx page, and I need to see some sample code, because I just can't make it work. I have a port with transport type HTTP, pointing to my aspx page, something like http://myserver/mypage.aspx. From there it gets blurry, because I just can't figure out how t...more >>

I'm using a COM DLL from a C# application via an interop wrapper generated by 'tlbimp.exe'. That all works fine, I can fire off methods and things happen as they should. My issue is that I want my application to check both that the COM DLL is registered on the system and its version is accepta...more >>

Could someone please tell me what the C# equivalent of this VB.NET code is: Dim aPropInfo() As System.Reflection.PropertyInfo aPropInfo = GetType(System.Drawing.Color).GetProperties This is what I came up with: Color dummy = new Color(); System.Reflection.PropertyInfo[] aPropInfo ...more >>

Class in the System.Collection.Specialized namespace like NameValueCollection that is defined as a parameter in one of the Webmethod causes a reflection error at runtime and gives InvalidOperationException and forces to implement Add method.My webservice class is not extending or trying to...more >>

I'm using Assembly.CreateInstance (3rd overload) to create an instance = of one of the types included on that dll. But what the hell are the bindingflags? I get this exception: MissingMethodException Constructor not Found on class ... Source: mscorlib TargetSite:System.Object = CreateInst...more >>

How To Create Transparent Windows Controls? Thanks ...more >>

I got a solution that contains about 30 projects, three of which cannot be open. When I open the project, I always receive the error message "Unable to get the project file from the Web Server" My machine is running Windows 2003. My colleagues are using the same hardware and software as I d...more >>

Hello: I need to extract named parameters from a SQL command using regular expressions, for example: select * from TEST_TABLE_01 where VARCHAR_FIELD = @varchar_field or CHAR_FIELD = @char_field"; has 2 named parameters @varchar_field and @char_field, but this select * from TEST_TABLE...more >>

My code: public class aaa { public void ShowWelcomeWindow() { Form welcome = new Form(); try { welcome.ShowDialog(); } catch(ThreadAbortException) { // No exception ... } finally ...more >>

This is for a utility that I am writing to update all of our Excel reports. I currently have a form with a couple list boxes and browse buttons. One browse button allows the user to add the XLS files they want to update and inserts the paths into the corresponding list box. The second browse butt...more >>

This is gona be fun with code generators, constructors all over the show. I remove my constructor from the wizard code (winform generator) and dispose method and put it into my own partial cuz im maintaining it now. So what does the winform designer do? Readd it? Sory but I just had nothing but...more >>

Hello, I know this has been discussed a lot already because I've been searching around for information the last few weeks. I'm trying to implement a DataGridComboBoxColumn class. I've found several examples on the web. They all seem to have problems, though that I've been unable to resol...more >>

I have a form that I need to pass the sales tax. Works great if sales tax is an interger. When I try to parse the sales tax with decimal place with Int32.Parse method I get exception. The sale tax field is input 7.5 when I pass this field to Int32.Parse(salesTax.Text) What is the availa...more >>

public class Entity : System.Windows.Forms.Label { .... protected System.Drawing.Point lastMousePosition; .... } public class Flow : Entity { .... protected override void OnMouseMove( System.Windows.Forms.MouseEventArgs e ) { int deltaX = MousePosition.X - lastMousePosi...more >>

Hi: I would like to implement a TreeView Control in a web page. Is this done with scripting or does it require an ActiveX control? Can someone point me in right direction? Thanks, Charlie ...more >>

When I add an Install project to my Windows Service project everything compiles and it works okay. The problem is the Installer only writes the files to disk, but doesn't actually install the service. Thus I must manually use InstallUtil.exe to install the service. I thought the installer h...more >>

There is a need to use "spellcheck" in our application. Can anyone point me in the right direction/give me a clue of how to go about this. Liz...more >>

HI, how to redimension an array in c#, and preserve it's contents (without using arraylist). In visual basic it... Dim I_interfaceArray() as I_interface = new I_interface() {objInterface} Redim Preserve I_interfaceArray(2) but I don't find a way to do this in C#. c#.... I_inter...more >>

Hi all, how can i change the Font Size of the Text in my Label. I will change it dynamic in the code. I tryed: int number = 11; label1.Font.Size = number; But this is not possible because Size is Write-Protected. There is only a Get-Method and no Set. Plz Help...more >>

Hi, My colleague implemented a class overwriting TextWriter. What he tried to do was logging to the event logger and logging to console. As you can see in the code below, the part of 'logging to console' will not work. However, I could not explain the results when I ran the code. It seems t...more >>

I've created a .net web service in c#. When there is no open session i need to free some resources. So, I've place the code on the Global.Application_End member. Unffortunatly it seems that the code is never executed (at least when i debug it). Help anyone?...more >>

Hi, I would like to edit a row in the datagrid after it has been loaded. I can remove and add a new row but I can't figure out how to just edit an existing row. I am also trying to figure out a way to add images to a datagrid cell. any help is very appreciated Thank you...more >>

Hello, I have an application that references about 40 assemblies (approx 80MB in total). I've installed the application on the network share and given a client PC full trust access. When I launch the application from the network it takes approx 4 minutes to startup, I've done network tr...more >>

Hi, From my main form I instantiate a usercontrol on a panel. How can I invoke functionality in my main form from events generated in my usercontrol? Is it possible to furnish the usercontrol with an eventhandler in my main form? Do I have to seperate out the functionality I want to ...more >>