# Adding marker causes blank map

**URL:** <https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947>\
**Category:** WebForms\
**Created:** [August 25, 2009, 7:45am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947 "2009-08-25T07:45:26Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Dustin](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/d/5daacb/32.png) [@Dustin](https://community.thinkgeo.com/u/Dustin)\
**Post date:** [August 25, 2009, 7:45am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/1 "2009-08-25T07:45:26Z")

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Hi,

After&nbsp;getting&nbsp;the&nbsp;newest&nbsp;temporary&nbsp;version&nbsp;(3.1.215),&nbsp;whenever&nbsp;I&nbsp;add&nbsp;a&nbsp;marker&nbsp;to&nbsp;a&nbsp;Marker&nbsp;overlay&nbsp;or&nbsp;SimpleMarkerOverlay,&nbsp;the&nbsp;map&nbsp;goes&nbsp;blank.&nbsp;&nbsp;&nbsp;However,&nbsp;if&nbsp;I&nbsp;add&nbsp;another&nbsp;marker,&nbsp;the&nbsp;map&nbsp;reappears.&nbsp;&nbsp;I&nbsp;have&nbsp;also&nbsp;confirmed&nbsp;this&nbsp;is&nbsp;the&nbsp;same&nbsp;case&nbsp;with&nbsp;the&nbsp;'Add&nbsp;a&nbsp;Marker'&nbsp;sample.&nbsp;&nbsp;Is&nbsp;there&nbsp;anything&nbsp;you&nbsp;might&nbsp;be&nbsp;able&nbsp;to&nbsp;do?&nbsp;&nbsp;Thanks&nbsp;a&nbsp;lot!

&nbsp;

EDIT:&nbsp;This&nbsp;only&nbsp;seems&nbsp;to&nbsp;occur&nbsp;in&nbsp;Firefox.&nbsp;&nbsp;IE7&nbsp;and&nbsp;IE8&nbsp;are&nbsp;fine.&nbsp;&nbsp;

-Dustin

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**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\
**Post date:** [August 25, 2009, 10:07am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/2 "2009-08-25T10:07:43Z")

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Dustin,  
  
  
  
Web&nbsp;Edition&nbsp;does&nbsp;regular&nbsp;Postback&nbsp;when&nbsp;you&nbsp;access&nbsp;server&nbsp;event.&nbsp;It&nbsp;causes&nbsp;the&nbsp;whole&nbsp;page&nbsp;refresh.&nbsp;If&nbsp;you&nbsp;add&nbsp;update&nbsp;panel,&nbsp;it&nbsp;still&nbsp;refreshes&nbsp;all&nbsp;the&nbsp;DOM&nbsp;tree&nbsp;node&nbsp;in&nbsp;the&nbsp;specific&nbsp;area.&nbsp;That's&nbsp;why&nbsp;the&nbsp;map&nbsp;reloaded.&nbsp;IE&nbsp;engine&nbsp;is&nbsp;different&nbsp;from&nbsp;Firefox&nbsp;which&nbsp;has&nbsp;another&nbsp;analysis&nbsp;for&nbsp;table.&nbsp;In&nbsp;IE,&nbsp;it&nbsp;actually&nbsp;refreshed&nbsp;but&nbsp;you&nbsp;cannot&nbsp;notice,&nbsp;while&nbsp;in&nbsp;Firefox&nbsp;you&nbsp;can&nbsp;notice&nbsp;it.  
  
  
  
The&nbsp;only&nbsp;thing&nbsp;we&nbsp;can&nbsp;do&nbsp;is&nbsp;recommend&nbsp;adding&nbsp;markers&nbsp;on&nbsp;the&nbsp;client&nbsp;side&nbsp;by&nbsp;Ajax.&nbsp;It&nbsp;won't&nbsp;refresh&nbsp;the&nbsp;map.&nbsp;You&nbsp;know&nbsp;we&nbsp;cannot&nbsp;eat&nbsp;the&nbsp;cake&nbsp;and&nbsp;have&nbsp;it.&nbsp;It's&nbsp;the&nbsp;disadvantage&nbsp;of&nbsp;web&nbsp;applications.&nbsp;Here&nbsp;is&nbsp;a&nbsp;related&nbsp;post&nbsp;for&nbsp;adding&nbsp;markers&nbsp;on&nbsp;the&nbsp;client&nbsp;side:  
  
[gis.thinkgeo.com/Support/Dis...fault.aspx](http://gis.thinkgeo.com/Support/DiscussionForums/tabid/143/aff/12/aft/5675/afv/topic/Default.aspx)  
  
  
  
Sorry&nbsp;for&nbsp;the&nbsp;inconvenience.  
  
  
  
Any&nbsp;more&nbsp;queries&nbsp;please&nbsp;let&nbsp;me&nbsp;know.  
  
  
  
Thanks,  
  
Howard

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**Author:** ![Dustin](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/d/5daacb/32.png) [@Dustin](https://community.thinkgeo.com/u/Dustin)\
**Post date:** [August 25, 2009, 11:35am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/3 "2009-08-25T11:35:44Z")

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Howard,&nbsp;  
&nbsp;I’m&nbsp;not&nbsp;actually&nbsp;referring&nbsp;to&nbsp;the&nbsp;map&nbsp;refreshing/flashing,&nbsp;I’m&nbsp;completely&nbsp;okay&nbsp;with&nbsp;that.&nbsp;The&nbsp;problem&nbsp;is&nbsp;that&nbsp;when&nbsp;I&nbsp;click&nbsp;my&nbsp;‘add&nbsp;marker’&nbsp;button,&nbsp;the&nbsp;map&nbsp;does&nbsp;not&nbsp;refresh,&nbsp;it&nbsp;simply&nbsp;goes&nbsp;blank.&nbsp;&nbsp;This&nbsp;has&nbsp;only&nbsp;occurred&nbsp;since&nbsp;3.1.215,&nbsp;and&nbsp;now&nbsp;that&nbsp;I&nbsp;have&nbsp;rolled&nbsp;back&nbsp;to&nbsp;3.1.182,&nbsp;that&nbsp;portion&nbsp;is&nbsp;working&nbsp;correctly,&nbsp;but&nbsp;the&nbsp;parts&nbsp;that&nbsp;I&nbsp;actually&nbsp;needed&nbsp;3.1.215&nbsp;are&nbsp;not.&nbsp;&nbsp;I&nbsp;was&nbsp;able&nbsp;to&nbsp;verify&nbsp;this&nbsp;by&nbsp;replacing&nbsp;the&nbsp;.dlls&nbsp;from&nbsp;3.1.182&nbsp;with&nbsp;those&nbsp;from&nbsp;3.1.215&nbsp;and&nbsp;running&nbsp;the&nbsp;‘Add&nbsp;A&nbsp;Marker’&nbsp;sample.&nbsp;&nbsp;After&nbsp;clicking&nbsp;the&nbsp;‘add&nbsp;marker’&nbsp;button,&nbsp;the&nbsp;map&nbsp;is&nbsp;simply&nbsp;a&nbsp;blue&nbsp;background&nbsp;until&nbsp;you&nbsp;press&nbsp;the&nbsp;button&nbsp;again.&nbsp;I&nbsp;hope&nbsp;this&nbsp;information&nbsp;helps&nbsp;describe&nbsp;what&nbsp;I’m&nbsp;experiencing&nbsp;a&nbsp;little&nbsp;better.&nbsp;&nbsp;Thanks&nbsp;again.&nbsp;&nbsp;  
&nbsp;-Dustin

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**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\
**Post date:** [August 25, 2009, 1:50pm UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/4 "2009-08-25T13:50:07Z")

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Dustin,&nbsp;  
&nbsp;&nbsp;  
&nbsp;I&nbsp;recreated&nbsp;you&nbsp;issue&nbsp;in&nbsp;3.1.215.&nbsp;It&nbsp;works&nbsp;fine&nbsp;in&nbsp;IE&nbsp;and&nbsp;Chrome&nbsp;except&nbsp;Firefox.&nbsp;So&nbsp;it&nbsp;may&nbsp;causes&nbsp;by&nbsp;the&nbsp;JavaScript&nbsp;analysis&nbsp;of&nbsp;Firefox.&nbsp;This&nbsp;bug&nbsp;is&nbsp;fixed&nbsp;in&nbsp;our&nbsp;latest&nbsp;version.&nbsp;Please&nbsp;ask&nbsp;[support@thinkgeo.com](mailto:support@thinkgeo.com)&nbsp;for&nbsp;this&nbsp;fix.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks&nbsp;for&nbsp;reporting&nbsp;this&nbsp;bug&nbsp;in&nbsp;our&nbsp;temporary&nbsp;version.&nbsp;  
&nbsp;&nbsp;  
&nbsp;If&nbsp;you&nbsp;have&nbsp;any&nbsp;questions&nbsp;please&nbsp;let&nbsp;us&nbsp;know.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks,&nbsp;  
&nbsp;Howard

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**Author:** ![Dustin](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/d/5daacb/32.png) [@Dustin](https://community.thinkgeo.com/u/Dustin)\
**Post date:** [August 26, 2009, 7:46am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/5 "2009-08-26T07:46:45Z")

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Howard,&nbsp;  
&nbsp;I&nbsp;received&nbsp;version&nbsp;3.1.216&nbsp;and&nbsp;the&nbsp;issue&nbsp;persists.&nbsp;&nbsp;Should&nbsp;I&nbsp;be&nbsp;asking&nbsp;for&nbsp;a&nbsp;particular&nbsp;version?&nbsp;  
&nbsp;-Dustin

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**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\
**Post date:** [August 26, 2009, 9:26am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/6 "2009-08-26T09:26:08Z")

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Dustin,&nbsp;  
&nbsp;&nbsp;  
&nbsp;Sorry,&nbsp;3.1.216&nbsp;doesn’t&nbsp;fix&nbsp;this&nbsp;bug.&nbsp;I’ll&nbsp;tell&nbsp;our&nbsp;support&nbsp;to&nbsp;send&nbsp;you&nbsp;another&nbsp;release&nbsp;after&nbsp;doing&nbsp;some&nbsp;simple&nbsp;tests&nbsp;on&nbsp;our&nbsp;latest&nbsp;build.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks,&nbsp;  
&nbsp;Howard

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<div class="post-metadata">

**Author:** ![Dustin](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/d/5daacb/32.png) [@Dustin](https://community.thinkgeo.com/u/Dustin)\
**Post date:** [August 26, 2009, 2:55pm UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/7 "2009-08-26T14:55:18Z")

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Working&nbsp;great&nbsp;now!&nbsp;Thanks&nbsp;very&nbsp;much!&nbsp;  
&nbsp;-Dustin

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**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\
**Post date:** [August 27, 2009, 9:23am UTC](https://community.thinkgeo.com/t/adding-marker-causes-blank-map/4947/8 "2009-08-27T09:23:19Z")

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Dustin,&nbsp;  
&nbsp;&nbsp;  
&nbsp;You&nbsp;are&nbsp;welcome.&nbsp;This&nbsp;bug&nbsp;is&nbsp;from&nbsp;solving&nbsp;an&nbsp;issue&nbsp;from&nbsp;IE;&nbsp;hopefully&nbsp;we&nbsp;can&nbsp;fix&nbsp;it&nbsp;early.&nbsp;Thanks&nbsp;for&nbsp;reporting.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Any&nbsp;questions&nbsp;please&nbsp;let&nbsp;me&nbsp;know.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks,&nbsp;  
&nbsp;Howard
