PDFsharp - moved to http://forum.pdfsharp.net/

cmosses · Joined: 05 Oct 2007 Posts: 6

Hello, great component, but I have this problem:

I need to draw a number of items in a list, and the list is quite narrow, so the items typically don't fit on a single line. I would like to measure how many lines a text fills when wrapped, but XGraphics.MeasureString does not have an overload that lets me specify maximum line width. It can only tell me the width of the text on a single line, not when broken into multiple lines.

I can do an XGraphics.DrawString and specify a layout rectangle, and that works fine, wrapping the lines perfectly, but afterwards I have no idea how many lines were filled. Thus, I don't know where to start the next list item on the page.

Is there any other way I could do this? Any ideas?

Can anyone please help? Thanks a lot in advance.

mohali · Joined: 23 Oct 2007 Posts: 2

I've a same problem. Did you measure no of lines. I need to know when the what is next line. Also when string is long.

Thanks,

-mak

cmosses · Joined: 05 Oct 2007 Posts: 6

mohali · Joined: 23 Oct 2007 Posts: 2

can you give me sample code?

thanks,

rgds,

-mak

cmosses · Joined: 05 Oct 2007 Posts: 6

Here you have the code that will do this:
PDFsharp Multiline MeasureString

ACS · Joined: 01 Dec 2007 Posts: 15

Thanks for the code, cmosses.
However there is a problem with that code that causes the method to return the wrong height (it will be off by 1 lineCount.)

The bug is not with the code itself, but rather with the .NET Framework's MeasureString method, which is used by PDFSharp's MeasureString method. The problem is that MeasureString will automatically trim the string being measured, eliminating any spaces. This means that " Hello, world! " will be measured as "Hello, world!". This is not a problem for single-line strings, but for multiple-line strings it may cause incorrect results.

I discovered this recently during a project and I found a cheapo way to resolve it, and that is by using a period character instead of a space, which is approximately the same width (at least with the few fonts that I've tested.) This will result in perfect MeasureString results each time.

If anyone's interested in this code, let me know and I'll post it.

cmosses · Joined: 05 Oct 2007 Posts: 6

ilivewithian · Joined: 07 May 2008 Posts: 4

I've noticed a small bug with the multiline MeasureString, it doesn't take into account \n in strings, so the number of lines will be wrong if a new line is in the code.
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