I know how cascading works with drop-down list boxes only and have used it in SharePoint/InfoPath. 

This is what I would like to do: 1 drop-down list box and 1 Rich text box (I need something that will allow more than 255 characters).  If I selected an item from the drop down list box the Rich text box would automatically populate with per-defined information.

Hello,

if you want more than 255 characters, then a multi-line field will do. It does not need to be rich text. 

You can use the same technique as with cascading dropdowns, i.e. set up a SharePoint list with Title and TextField. In InfoPath set up a data connection to the list and build a drop-down list on the Title field and use rules to copy the TextField for the selected Title. 

InfoPath will not be able to copy the formatting of Rich Text, because the data connection returns just XML. All formatting of rich text will be stripped. 

I have a text box and in the properties field I have Multi-line selected but I still get and error; only text strings less than or equal to 255 character(s) allowed. 

Just defining the control to multi-line will not work if the underlying field is single line. Define the column in SharePoint. Define it as multi-line plain text. Then add it to the form in InfoPath. That will give you the correct field and the correct control. 

Works fine for me.  I have a rule that fires when the Selector field changes. The PlainText field in my form will be filled with the value from the PlainText field in secondary data source that has the same Title as the text in the current form's Selector field. The screenshot shows the form preview at the top and the IP canvas below. 

Hi,

I have sharepoint list

Car	Type
Honda	International
Toyota	International
GM	Domestic
BMW	International

if I select type international I would like to see all Car brand list on Text Box on my InfoPath form.  Could you help.

Thanks

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