C# Discussion Boards - CodeProject

Re: Printing multiple font sizes on the same page...

25-Sep-09 4:27

You're design is completely hosed up. You're printing a new page for every line of test your outputting. You can only call the Print method once per page, so you have to do all of your drawing before you call Print. So, you're PrintDocument class is going to need to know what the page looks like, every line, every image, so when Print is called, it can draw all of this stuff on the Graphics object that you get in the OnPrintPage event.

You basically need to implement some method of passing font, string, and drawing commands to your PrintDocument class. That class has to maintain a database of all of these commands. When the OnPrintPage event fires, your code has to go through all of these commands and execute them, one at a time, drawing each element of the page.

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

jameschristianii25-Sep-09 4:32

Re: Printing multiple font sizes on the same page...

25-Sep-09 4:32

I was attempting to implement something to what you are saying. I didn't know the exact approach at doing that. I was trying to use a stringbuilder but my results were ineffective. I'm assuming I needs a means of implementing a flag for each string of text, correct?

Thank you.

Dave Kreskowiak25-Sep-09 5:19

Re: Printing multiple font sizes on the same page...

25-Sep-09 5:19

Think of each string of text as an object that needs to be drawn on the page. Each object needs to supply certain things to your drawing engine. The first, obvisouly, is the text that needs to be drawn. You also need to know where on the page the text needs to be drawn and in what font, style, and size. In your OnPrintPage event handler, the code needs to enumerate the collection of these objects and draw each string at the position where it needs to be and with the correct font.

To use something like this, you'd probably do something like:

ReceiptPrint receipt = new ReceiptPrint();
// Draw the receipt store header.
receipt.AddDrawCommand(new TextDrawCommand("Some Store Header Text", "Arial", 16, FontStyle.Bold));
receipt.AddDrawCommand(new TextDrawCommand("Some Address Text", "Courier New", 10, FontStyle.Normal));
receipt.AddDrawCommand(new TextDrawCommand("------------------------", "Courier New", 10, FontStyle.Normal));
// Draw the list of items on the receipt.
foreach(...)
    receipt.AddDrawCommand(new TextDrawCommand(ItemText, "Arial", 10, FontStyle.Normal));
// Now print the page.
receipt.Print();

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

jameschristianii25-Sep-09 5:51

Re: Printing multiple font sizes on the same page...

25-Sep-09 5:51

Ok, I understand what you are saying (It is similar to what I was trying to do earlier this morning), but I am unsure as to how I would go about the method you're suggesting. It was inside my class that I couldn't quite get the collection correct. I wasn't sure as to how I would set the object (string, font) and pass the object to the DrawString by looping through the collection.

jameschristianii25-Sep-09 17:44

Re: Printing multiple font sizes on the same page...

25-Sep-09 17:44

Any one have a suggestion / idea / recommendation as to how (Or where I can research) a solution?

jameschristianii26-Sep-09 5:30

26-Sep-09 5:30

Can someone point me in a direction as to how to resolve this? I have been scouring the internet for hours trying too many things that aren't working completely.

Thank you,

James

single User single login

Shalini_U25-Sep-09 2:37

Shalini_U

25-Sep-09 2:37

I've Created one Desktop Application which has server client access... Every user will has different login. Now the problem is, when one user is login, the same user cannot be login from other pc... The msg should come as the 'user is already Login'. In ASP.Net, it can be achieved through session.. But, how can I do this in Desktop Application. There is one solution.. We can maintain one log table for the logined users. But, that too will face deadlock situation.... Is any other solution for the single user login??

musefan25-Sep-09 2:47

musefan

25-Sep-09 2:47

Shalini_U wrote:
I've Created one Desktop Application which has server client access

When you say server/client access, do you mean you have both a server app and a client app? if so, then the server app will easily be able to keep a list of logged in users and validate the login.

Life goes very fast. Tomorrow, today is already yesterday.

Shalini_U25-Sep-09 3:16

Shalini_U

25-Sep-09 3:16

Deadlock Situation may occur na?? ? Then, any user could not log in again

Dave Kreskowiak25-Sep-09 4:20

25-Sep-09 4:20

That depends on what you mean by "deadlock situation". I can't think of an issue that can't easily be resolved in a setup liek this.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Upload data to Amibroker?

musefan25-Sep-09 4:28

musefan

25-Sep-09 4:28

When the server app validates login can it not check if existing user connection is still active?

Life goes very fast. Tomorrow, today is already yesterday.

$uresh $hanmugam25-Sep-09 2:32

$uresh $hanmugam

25-Sep-09 2:32

Hi,
If anybody have an idea to upload quote data(in .CSV format) from c# application to Amibroker chart application.

DataTableColumn.AutoIncrementSeed value

Doktor25-Sep-09 0:13

Doktor

25-Sep-09 0:13

Hello Ladies and Gentleman,

I have a problem with the DataTableColumn.AutoIncrementSeed value.
I am loading a set of Tables from my SQL Server DB to a DataSet by using SqlDataAdapter Fill method (I am using the MissingSchemaAction.AddWithKey property).

So I have a master detail scenario in my DataSet with 3 different tables, PrimaryKeys (all with autoincrement = true) and ForeignKeys.

The Problem is, when I insert new rows into the DataTables I want them to have ID's starting from -1 with an AutoIncrementStep = -1. The AutoIncrementStep is working fine.
Nevertheless I can not change the AutoIncrementSeed Confused | :confused:

Even if I set its value to -1 (I checked in the debugger, the value is -1), after adding a new row, the seed starts at the last ID's value read from the DataBase while filling the DataTables. Am I missing something, or is this just impossible to change?

I would be really grateful for help.

Greets,
Arek

S.Dhanasekaran25-Sep-09 1:04

S.Dhanasekaran

25-Sep-09 1:04

Hi,

To add auto increment column in the DataTable, we can set the AutoIncrement property of the DataColumn object as true and specify the seed value after adding that field into the DataTable object.

// create columns for the DataTable

DataTable dTable = new DataTable();

DataColumn auto = new DataColumn("AutoID", typeof(System.Int32));

dTable.Columns.Add(auto);

// specify it as auto increment field

auto.AutoIncrement = true;

auto.AutoIncrementSeed = 1;

auto.ReadOnly = true;

Doktor25-Sep-09 1:15

Doktor

25-Sep-09 1:15

Hi S.Dhanasekaran
thank you for your reply, I really appreciate.

Why do I have to create a DataColumn by myself? When I use SQLDataAdapter Fill() method, it does the same for me.

After using the Fill method of the SQLDataAdapter I do sth like this:

dataS = new DataSet();
...
dataS.Tables.Add(dataTable);
dataS.Tables["MyTable"].Columns["MyID"].AutoIncrement = true;
dataS.Tables["MyTable"].Columns["MyID"].AutoIncrementStep = -1;
dataS.Tables["MyTable"].Columns["MyID"].AutoIncrementSeed = 0;
dataS.Tables["MyTable"].Columns["MyID"].AutoIncrement = true;
dataS.Tables["MyTable"].Columns["MyID"].ReadOnly = true;

When i check the debugger, the AutoIncrementSeed is "-1" and the AutoIncrementStep is also "-1".
But for example, when I have now 4 rows with MyIDs = {1, 2, 3, 4} and I add manually a new row to the DataSet, the value of MyID should be -1, but it is 3.
And I have completely no clue why is that Confused | :confused:

Dave Kreskowiak25-Sep-09 3:59

25-Sep-09 3:59

You cannot use negative numbers as the autoincrement value. Negative numbers are used by the DataAdpaters to add new records to the dataset that haven't been added to the backing database yet. The first new record you add will have an ID of -1, the next new record will be -2, and so on. Those are the temporary values used to uniquely identify each new record. They will get actual IDs once the changes are written to the database.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...