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Hi All, I've asked around and no-one seems to be able to answer me!... Here's my question(s): All in C#: Abstract collection based on an arraylist "ab_collection.cs" Abstract entity object which stores ID and Description "ab_entity.cs" Real collection based on abstract collection "number_of_people.cs" Real object based on abstract entity "person.cs" Question 1: If I put an add method on my abstract collection public void Add(ab_entity entity) { addme(entity); } When I inherit the method within "number_of_people" will it loose any of my entity if I pass a "person" object to it. Question 2: If my "person" entity has additional storage of Firs…

I have a program that draws on my desktop...but I want it so after 10 seconds the line goes away. I thought ReleaseDC(hWnd, hDC) would do it but it didn't i have to put like a window ontop of it or something then it will go away. and My line drawing is on a loop and in a timer. I actually have the drawing on a hotkey...so when I press PrintScreen, it will draw, but I want it to after 10 seconds it will vanish...

Hi all, What would be the pattern for finding the last comma in a line of text? Ex: Brown, Brown, Brown, Brown, Brown, Brown Thanks a bunch! ;)

With generics in 2.0 it's easy to databind the custom object collections to controls that support databinding. However I have hit a snag. If you databind a dataset to a DataGridView control which has two tables with relationships setup between them, the DataGridView will generate a little "+" next to the row which will let you drill down into the actual details of the child table (you can see this functionality in the XML editor in VS). However, I have a generic collection of custom objects for which I want to display the same or similar functionality and so far I have not figured out a solution for this. I was hoping for an interface that would let me specify the …

I can add a Sub Main to a module as a start point for the application, as I would have done in VB6, but I can't figure out how to specify that this is where the application is to start. The listbox under Application Properties/Application/StartUp Form only allows me to select forms. So how do I do this?

OK, I got the WIA thingy working etc. Now I have a problem. My app scans predefined forms which contain a small square for a signature and a paraf. Signature is divided from the paraf with a thin black line. here's how the process goes: 1. scan a picture with a WIA compatible scanner 2. save entire A4 image in TIFF 3. again with WIA I crop the abovementioned square + save the Tiff and delete the original one, and load the crop into PictureBox 4. then I do this Private Sub pictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Dim g As Graphics = e.Graphics g.FillRectangle(System.Drawing.Brushes.White, 529, 0, 7, Pi…

This is probably answered somewhere already, but I was unable to locate what I needed. I want to have my application start when booted, and I do this by putting a registry value in the Software-Microsoft-Windows-CurrentVersion-Run. Right now, I always put this value under HKEY_LOCAL_MACHINE but I want it to go there only if the user selected to install my application for everyone. If they selected to install only for the current user, then I want this key to be added in the HKEY_CURRENT_USER. How can I base this on the users selection?

i keep having a concurrency violation when i try to update a row in my database. im adding the data via a form, and when the user clicks a button it is added to the database, but when i go back to the form to edit the data i get the concurrency violation. ive had it for a few days now and cant fix it. anyone have any ideas? heres where i add a row to the dataset. the recordcreated is a boolean to tell if the record needs to be created, or if it exists and needs to be edited instead if(recordCreated == true) { ds.Tables["Patient"].Rows[ds.Tables["Patient"].Rows.Count-1].BeginEdit(); ds.Tables["Patient"].Rows[ds.Tables["Patient"].Rows.Count-1]["first_name"]…

hi, i'm taking a discrete class and im also taking computer science 1, so therefore i am not qualified to write the programs that we have for projects, this is the last one and i managed to somehow get the other one done, but does anyone have any suggestions please on how to do this, i am somewhat c++ illiterate since we just covered functions. i am going to be doing this in visual c++, maybe :confused: i attached the file with the project, i would prefer to have replys sent to dstone2323@hotmail.com but anyway i can get any help i will be greatly appreciative. i have to get this done by 12/7, thanks.... the other people in the class (who are very near graduating) said …

I have a form that loops through a file that could have 100,000 lines in it. Each line gets parsed and imported into a database, and functions perfectly. Unfortunately, it can take a significant amount of time to run the code. I need to give the user some sort of indication that the application is functioning. I added a simple counter that updates after every record is loaded into the database, i.e.: Label2.Text = "Loaded " & Cnt & " of " & RowCnt & " Records" Label2.Update() The label gets updated perfectly for approximately the first 1000 records. After that the form seems to lock up and appears to be "Non-Responsive". However, the app i…

All, In the code below, I display a Name in the left column next to the right column where the doc type in the right column is Typ1. But my real need is to display the name (DataItem.Name) only for the first row and not because it corresponds with doc type Typ1. I've begun to learn a little bit about DataGridItems but need to figure out how to display field values conditioned upon being in a specific row, as in this case, the first row only. Can anyone show me how that would look? I will also need to know how to display the name (DataItem.Name) in place of "Search Results" between my HTML header tags. how can this be accomplished? Thanks all!! = = = = = &…

I work on a little project that load's mesh data from a custom txt file this code give me the access violation exception in Mesh.drawsubset(0) line. I am using directx 9.0c april 2005 and vs2005. any ideas? using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using Microsoft.DirectX; using Microsoft.DirectX.Direct3D; using System.IO; namespace MeshDemo { public partial class Meshes : Form { private float xRotate = 0; private float yRotate = 0; private float zRotate = 0; private float h = 0; …

Hi, I'm running into a problem when trying to use class interfaces from this library called Audiere. The library was written in C++ as virtual functions that were COM compatible. To use the interface you call a function in the DLL that returns a pointer to the interface (Factory?). They are bindings for Purebasic and Delphi that use the interfaces directly. I made a binding for the D language using interfaces that inherited from the IUnknown interface and it worked. Since .NET supports COM interop I thought this should work easily. I created the interfaces and marshaled them as IUnknown(I had to inherit from IUnknown to get it to work in D). I declared the functions in th…

Hello all, I have to problems that i can not seem to overcome in my current project. 1. Runtime datasource, dislplaymember, valuemember of a list box 2. In using oledb with apropriate data adapters and datasets and putting certain information into variables 1. Ok here is the code i am using: CustDataAdapter.Fill(cust1) lstChoice.DataSource = Cust1 lstChoice.ValueMember = "id" lstChoice.DisplayMember = "Name" This is using a dataset named cust1 with two fields named id and name. It works fine if i use the property options and set it up before i run. But this refuses to work, What am i doing wrong? I am going to be doing this sever…

hello all! i need to sign and encrypt an e-mail message (using a certificate in the certificate store) and send it using C#2005. this is very confusing, as i found all required resources on msdn2 to sign and encrypt a cmsEnvelopedMessage, but i cannot find how this relates to an e-mail message (System.Net.Mail) in an older vb6 version, we used CAPICOM, but aren't able to get it to work for the .NET 2.0 framework ... is it worth looking into, or is CAPICOM obsolete at this point ? any hints/tips/links are welcome ... thank you! Huby.