There are some default prevalue source types that can be used.
Here is a quick overview of them:
Get values from textfile
Upload a textfile that contains the prevalues. Each prevalue should have its own line in the file. Once the file has been uploaded, you can find it in ~/wwwroot/App_Data/UmbracoForms/Data/PreValueTextFiles/{GUID} where the {GUID}is replaced with the pre-value ID.
Umbraco Documents
Allows to use content nodes from a specific source as prevalues. You can define the root node by either
Choosing a node directly from the Content tree or
Using XPath
Additional settings can be applied:
Select Use current page as root instead of choosing a specific root node. The preview is not available when this setting is enabled.
Select a specific Document type, if the selected root node contains a different Document Type.
Select to include Grand children of the selected root node.
SQL Database
Connect to a OleDB compatible database table and construct a prevalue source from it. Once selected, it will be editable from the Forms interface.
The following configurations need to be set:
Connection string (either choose one from your web.config or add another from a textfield)
Connection String from configuration
Table Name
Key Column
Value Column
Umbraco Data Type Prevalues
Choose an Umbraco Data Type to use its configured prevalue collection.
In the example below, the prevalue collection from a Data Type called Home - Font - Radio button is used:
