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removeChild, SSL and Infragistics WebHtmlEditor

By , 01/30/2008 3:05 PM

I was working with Infragistics WebHtmlEditor control, and on client side it was being moved around by appendChild, removeChild DOM methods. All worked fine until I tried it over SSL connection. Immediatly removeChild method cause Secure/Unsecure waring.  Digging a bit I found that it was an IE bug. According to Microsoft this problem occurs if the Web page script calls the removeChild method to delete a DIV element that references a background image, and they suggest either to set outerHTML of the DIV to an emtpy string (which I think is dumb if you still need to use element you removed), but their second solution to move background-image declaration into an external CSS class actually works. In reality this problem occurs not only with DIVs but with any HTML element with background image in its inline style. In my case WebHtmlEditor rendered itself as an HTML table and its cells had background-image specified. The control itself didn’t have corresponding images set, but its UseDefaultStyles property was set to BackrgoundImages – which resulted in rendered styles with background images. To apply modified Microsoft’s solution I set this property to None, then segregated background image into a separate class:

.HTML_EDITOR
{

background-image:URL(ig_common/images/htmleditor/backimagerow.gif)
}
and used that class in Toolbar and TabStrip CSSClass properties. Worked like a charm.

SQL SELECT: Large Row Size (“cannot sort a row of size …”)

By , 01/17/2008 11:41 AM

Had a weird error today in my MS SQL Query that had worked for months.

Cannot sort a row of size 8304, which is greater than the allowable maximum of 8094

The only difference – a few text fields the query returned had larger amount of data than usual. What saved my day is ROBUST PLAN hint, when I added OPTION(ROBUST PLAN)  to my ORDER BY clause – the query ran perfectly.  So if you ever experience similar problem (usually it happens when you join several tables with large sets of data)  try this approach.

For detailed explanation of ROBUST PLAN and other hints visit Microsoft Tech Net

DHTML JavaScript Graphics – draw without flash

By , 01/16/2008 1:05 PM

This JavaScript VectorGraphics library provides graphics capabilities for JavaScript: functions to draw circles, ellipses (ovals), oblique lines, polylines and polygons (for instance triangles, rectangles) dynamically into a webpage. Usage of this Vector Graphics library should be easy even if you don’t have JavaScript experience
This is very cool. This javascript graphics libary allows you to draw pretty much any shape, image or text directly into HTML without 3rd party plug-ins like Flash. Speed is amazing and it’s cross-browser compatable too. Get it at  http://www.walterzorn.de

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