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I am working with PageLayoutControl, its mapframe include elements: lines, texts. And I am getting an error when zooming: If I zoom the pagelayout to 100% ( smaller than 110%), it can display "Dash Lines". But, if zoom to 120% (or larger), all "dash lines" become "solid lines". Please see attached screenshots:zoom to 100%

zoom to 120%

And another problem: when I print the pagelayout, all dash lines become solid lines.

Are there anyone know what's wrong ?

Thanks and regards,


share|improve this question
And I thought I was picky! Sorry to say I don't know what might be causing that. If you can create a Short, Self Contained, Correct (Compilable), Example (SSCCE) that exhibits the issue and host it somewhere, perhaps someone will be able to help you. Otherwise that seems like a pretty minor problem to me and I would just say "deal with it" to the customer. – blah238 Nov 1 '12 at 5:02
Thanks blah. If I use the zoom command of Map, it is ok. But, when I use the zoom command of PageLayout, it is not ok (dash lines become solid lines). Do you have any ideas ? – taibc Nov 1 '12 at 8:14
Hi, I created and uploaded demo example. Please download at the link: . Thank you for your help – taibc Nov 3 '12 at 7:21
Got it to compile at 10.1 SP1 after some fiddling and I can confirm I'm seeing the same thing. The dotted and dashed lines become solid lines once you zoom in past a certain point in layout mode. – blah238 Nov 3 '12 at 9:16
Here is the 10.x version if anyone's interested: – blah238 Nov 3 '12 at 9:21
up vote 3 down vote accepted

Turns out this is a known issue and has to do with how Simple Line Symbols are drawn using GDI. If the line width exceeds 1 point when displayed, it is drawn as a solid line. The workaround is to use a Cartographic Line Symbol instead.

share|improve this answer
Thanks blah238, Could you give me an example how to create a dot line and dash line with Cartographic Line Symbol ? – taibc Nov 5 '12 at 1:47
There is a dashed line example in my 3rd link:… – blah238 Nov 5 '12 at 2:13
Thank you. But I don't understand about values: pttrn, for example: pttrn[1] = 7 (why is it 7 ?? not 9, or 10). How can I change it to create a dash line like this: - - - - - - - or dot line: . . . . . . . – taibc Nov 5 '12 at 2:22
I can do now. Thank you for your help – taibc Nov 5 '12 at 3:15

By replacing the interface ISimpleLineSymbol by the interface ILineSymbol, the program works without problems of zoom, the main obstacle for using ILineSymbol object that it has'nt style attribut, i searched about setting style for ILineSymbol but without a result.

in my case i use this code to get the symbol from a symbology control.

ILineSymbol line_symbol = (ILineSymbol)symbolForm.GetItem(esriSymbologyStyleClass.esriStyleClassLineSymbols, (((lyr as IFeatureLayer) as IGeoFeatureLayer).Renderer as ISimpleRenderer).Symbol  )  ; 

you can find the GetItem in this sample C# script

i tested the program using a serialized ILineSymbol object in an XML file , you will find the test version in this link.

share|improve this answer
Thanks geogeek, but I don't know how to use your way to create a dash line: - - - - - - - - - or dot line: ............. I am not clear about xml file, it doesn't contain dash style or dot style ? – taibc Nov 5 '12 at 2:26

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