# ExtentChanged

**URL:** <https://community.thinkgeo.com/t/extentchanged/5282>\
**Category:** WebForms\
**Created:** [April 19, 2010, 3:46am UTC](https://community.thinkgeo.com/t/extentchanged/5282 "2010-04-19T03:46:30Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Eugene](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/e/8797f3/32.png) [@Eugene](https://community.thinkgeo.com/u/Eugene)\
**Post date:** [April 19, 2010, 3:46am UTC](https://community.thinkgeo.com/t/extentchanged/5282/1 "2010-04-19T03:46:30Z")

</div>

Hi&nbsp;All,

I&nbsp;have&nbsp;noticed&nbsp;a&nbsp;bug&nbsp;in&nbsp;&nbsp;the&nbsp;way&nbsp;the&nbsp;application&nbsp;handles&nbsp;the&nbsp; **extentchanged&nbsp;** event:

When&nbsp;one&nbsp;isn't&nbsp;tapped&nbsp;into&nbsp;the&nbsp;event&nbsp;(no&nbsp;event&nbsp;handler&nbsp;added)&nbsp;zooming&nbsp;and&nbsp;panning&nbsp;occurs&nbsp;gracefully:

test.lightstone.co.za/mapsuite/compsales2.aspx?req\_id=85ee8c4b-b013-4d7e-9447-d9320836d331

but,&nbsp;when&nbsp;the&nbsp;event&nbsp;is&nbsp;handled&nbsp;it&nbsp;seems&nbsp;to&nbsp;reload&nbsp;the&nbsp;entire&nbsp;map&nbsp;out&nbsp;every&nbsp;time&nbsp;the&nbsp;event&nbsp;is&nbsp;fired&nbsp;(in&nbsp;staid&nbsp;of&nbsp;partial&nbsp;reloads&nbsp;in&nbsp;the&nbsp;case&nbsp;of&nbsp;panning&nbsp;and&nbsp;keeping&nbsp;the&nbsp;previous&nbsp;map&nbsp;on&nbsp;the&nbsp;screen&nbsp;when&nbsp;zooming).

test.lightstone.co.za/mapsuite/compsales2.aspx?req\_id=85ee8c4b-b013-4d7e-9447-d9320836d331&evt=1

I&nbsp;have&nbsp;noticed&nbsp;that&nbsp;this&nbsp;happens&nbsp;with&nbsp;the&nbsp; **click&nbsp;** event&nbsp;as&nbsp;well:

test.lightstone.co.za/mapsuite/compsales2.aspx?req\_id=85ee8c4b-b013-4d7e-9447-d9320836d331&clk=1

In&nbsp;both&nbsp;cases&nbsp;i&nbsp;am&nbsp;just&nbsp;handling&nbsp;the&nbsp;event,&nbsp;but&nbsp;not&nbsp;doing&nbsp;anything&nbsp;inside&nbsp;the&nbsp;handlers:

&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;Protected&nbsp;Sub&nbsp;Map1\_ExtentChanged(ByVal&nbsp;sender&nbsp;As&nbsp;Object,&nbsp;ByVal&nbsp;e&nbsp;As&nbsp;ThinkGeo.MapSuite.WebEdition.ExtentChangedEventArgs)

&nbsp;&nbsp;&nbsp;End&nbsp;Sub

&nbsp;&nbsp;Protected&nbsp;Sub&nbsp;Map1\_Click(ByVal&nbsp;sender&nbsp;As&nbsp;Object,&nbsp;ByVal&nbsp;e&nbsp;As&nbsp;ThinkGeo.MapSuite.WebEdition.MapClickedEventArgs)

&nbsp;&nbsp;&nbsp;&nbsp;End&nbsp;Sub

yet&nbsp;it&nbsp;still&nbsp;does&nbsp;a&nbsp;complete&nbsp;reload.

&nbsp;

Is&nbsp;this&nbsp;a&nbsp;known&nbsp;bug&nbsp;and&nbsp;if&nbsp;so&nbsp;is&nbsp;there&nbsp;any&nbsp;resolution&nbsp;to&nbsp;it?

&nbsp;

&nbsp;

---

<div class="post-metadata">

**Author:** ![Khalil](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/k/bc8723/32.png) [@Khalil](https://community.thinkgeo.com/u/Khalil)\
**Post date:** [April 19, 2010, 4:44am UTC](https://community.thinkgeo.com/t/extentchanged/5282/2 "2010-04-19T04:44:49Z")

</div>

Hi,&nbsp;Eugene&nbsp;  
&nbsp;&nbsp;  
&nbsp;The&nbsp;ExtentChange&nbsp;and&nbsp;Click&nbsp;event&nbsp;will&nbsp;cause&nbsp;postback&nbsp;but&nbsp;callback&nbsp;on&nbsp;map,&nbsp;so&nbsp;the&nbsp;page&nbsp;will&nbsp;be&nbsp;reloaded.&nbsp;It&nbsp;works&nbsp;well&nbsp;and&nbsp;just&nbsp;the&nbsp;right&nbsp;way&nbsp;what&nbsp;we&nbsp;want,&nbsp;so&nbsp;it’s&nbsp;not&nbsp;a&nbsp;bug.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks,&nbsp;  
&nbsp;Khalil