Delphi Single User Apps Topic Most Read Threads

Hello pals,, , I have a Delphi application connecting to an Oracle database sitting on a Citrix server. When I try to do certain things I get an error 'Access violation at address...' The application was not developed inhouse and I do not know Delphi & Citrix so I can't guess why I get the error message. I get this message even when I am logged in as administrator on the citrix server and try to open a client session from there. The application runs without any problem on Windows NT/98. The problem seems to be specific to Citrix and Delphi, can anybody please help., , Hope I have given enough details., , Thanks,, , -Shyami

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How can I display a field varbyte in a DBGrid in Delphi 4?

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I have written a program that does soundanalyses with a FFT-function. To view the data I want to display it in a spectrogram. The method I have applied now is drawing the frequencies on the vertical axis and time on the horizontal axis. The amplitude of the signal is displayed using different colors. To draw the colors on the bitmap I currently use the Pixel function of the Canvas, but this goes really slow., , My question is : Is there another, faster method to draw colors on the bitmap; keeping in mind that every pixel could have another color?

How do I hide the startup DOS Command prompt window? , I tried , , , procedure TForm1.formcreate(Sender: TObject);, var, start : TStartupInfo;, begin, start.wShowWindow := SW_HIDE; , end;, , , in my main form, but it makes no difference., , Thanks in advance.

Hello everyone!  I am new to Delphi and I am picking it up really quickly by the way.  My problem is I haven't seen a working Mysql database that worked from examples I have downloaded.  I have gotten a few Access database running with Delphi.  What I can't seem to do however is get a certain recordset.  I can't find no information on pulling a specific recordset with Access/Delphi. Here is what I am trying to do:  when a person logs on to the chatroom server, I want them to have access  to the information they entered in there personal record only? If there is an easier way to do this besides using Access, can someone point me in the right direction please.  I am using Delphi 7. Thanking you all in advance!!! 

I am having a speed problem when writing new values to a MS Access table via and ADO connection.  On the first pass through the dataset there is no problem, with more than 1000 records per second being updated.  But on the second pass through, it slows to about 10 records per second, even though the task is much simpler. Just the fact that I try to update just one field seems to trigger the slow speed on the second pass.  I am using a TADOConnection and a TADOTable to connect to the Acces table.  To update the filed values I am using...    MyADOTable['MyFieldName'] := NewFieldvalue; Some parameters for the connection include... ConnectionString = Provider=Microsoft.Jet.OLEDB.4.0;Mode=Share Deny None;Persist Security Info=False, CursorLocation = clUseServer, Provider = Microsoft.Jet.OLEDB.4.0 Can anyone suggest what might be causing the problem or any possible solutions.  Regards  Ron

Can anybody help me with getting a directory file listing into a listbox so that I can programatticlly go through the listbox and put the filenames into a database they Database part is not causing me any trouble I can get it into  a dirlistbox but can not use that to then post certain of the file names to the Database any help is most appreciated Owen

I have an array y=11 by x=20 array containing Tpanels they all have corresponding colours assined to them. i would like to be able to search through the arraay to find a cirtian colour and change it to another, i tried this but it didnt work. procedure TFrmSeatLayout.BtnDeselectAllClick(Sender: TObject);, begin, ListSelectedSeats.Items.Clear; (ignore this), if ArPnl [x,y].color = clPurple then (the array is called Arpnl), ArPnl [x,y].color := clTeal; end;  I want it to find the Purple panel and change it to Teal Thanks for your help Tom

OKay lets start, I am a complete rookie. I have some sample code that I am trying to play with. It works in its current form. It creates a button on a screen. The little tutorial I am running through has me trying to change the bitmpa image that appears on the button. When I try and recomplie it I get this error:, [Fatal Error] InvoiceButton.dpk(29): Required package 'vcl50' not found. I tried to compile the original as well and I get the same thing. I am using Delphi 6 personal edition, , Thanks

I, or users of code I have written have seen this error message pop up while running the programs I have written. I can't imagine why. It seems to me that these table names are hard-coded into the executable. (Two different programs, one using Paradox Tables, one using DBISAM) I hardly know where to begin looking for the problem. Any ideas?

Hi, , Can someone show me how to change the font properties of a single cell in a StringGrid?, e.g. to make the text in that cell bold or a different color from the rest of the StringGrid., , Thanks, Merlin

Hi,, Does anyone know how to make a program process every setting in an ini file?, , I have 2 problem settings in my program that can't seem to process the results from the ini file, one is "Always on top" and the other is "minimize to tray". My program can save the settings with no problems but when I run the program and it reads the ini file, if both settings are set to true the program only seems to process one of them., , My guess is because both settings relate to window functions. I tried Application.ProcessMessage but that didn't fix the problem., , Any help or suggestions would be appreciated., , Merlin

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I have a field called Expire_Date that contains dates like that, "MM-YY" (M=month, Y=Year) and I need to do a simple select to , get all the records that have expire date less than or equal to, 6 month from the current computer date, , I can't iterate throw the whole table it is very big I need to do a select, I use Delphi 6 with Interbase 6, thanks

Can anyone help me, , How can I store Jpeg Camera files into my database, , I have a field in my database called image which is set to a graphic Type, , How can I store a jpg image into the database and then view it as i select the record from a table, , I can make it all work using mbp files but not using jpg files is there a trick to it or do you need to comvert them to bmp and if so how can I do that, , Thanks, , Owen

Im back with more trouble , , Now I need to get a string copied to the windows clipboard, so I can paste(ctlr-V) the string in other application., , Again, I find my skills inadequate

Can anybody help me with getting a directory file listing into a listbox so that I can programatticlly go through the listbox and put the filenames into a database they Database part is not causing me any trouble I can get it into  a dirlistbox but can not use that to then post certain of the file names to the Database any help is most appreciated Owen

In my Delphi program a key-filter-procedure is called OnKeyDown, , which veryfies the variable (Key : word). For a number of keys, Char(Key) , does not correspond to the character of the key as indicated on the key-board., However, in the following OnKeyPress the variable key corresponds , to the correct character., , My question:, How can I determine already in the OnKeyDown-procedure the correct key?

Can someone show me how to use multiple units in a project? I've written an app in Delphi 6 and I want to seperate the code to make it easier to edit. But I can't figure out how to use multiple units with only the one form., , Thanks for any help., , Merlin

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Hi,, , i made a DLL with a number of routines. Among the variables is ( Var Lines : TStringList )., I make the stringlist and pass it to the procedure, the procedure does it's thing then the Lines.Text gets the correct data. I've checked that. The problem now is this : i try to free the TStringList object like this : Lines.Free, This results in a invalid pointer operation address FFFFFF, , I tryed the same with the a regular unit then it works, but when i use the DLL ( same routine ) then i get this error., , Any idea's what might be causing this ?, Since i can access the Text property correctly after processing by the routine in the DLL i assume that the pointer to the object is still correct,.. so what could it be ???, , Help Plz. , Thx

I have just thought I might move all my delphi stuff onto my 2003 server and then use remote desktop to access it however some of my apps give me a bdertl70 error when trying to open in delphi however the exe runs fine I am Using Delphi 7 Enterprise Is this an issue with server 2003 or do I need to look harder It seems to be apps with multiple tables that give the trouble all these came of a Windows XP Pro Box and worked just fine Thanks Owen

Can someone help me with a little problem I'm having? I need to copy the text values from the main nodes in a TreeView to ComboBox items., I know the code below will add a single node :, Form3.ComboBox1.Items.Add(TreeView1.Items[3].Text); And I tried using a 'for' statement and replacing 3 with i, but i keep getting an invalid index error. Plus that would add all nodes, and I only want the parent nodes.