Various technologies and techniques are disclosed for automatically assigning data bindings to data sources and data sets in the design surface of visual designers. A user selection is received to insert a data element into a data region on a design surface. When there is just one data source and one data set defined in the design surface, a list of fields from the one data set is displayed in a user-selectable list, and the data set is automatically assigned to the data element based upon the selected field. As the user interacts with the design surface to insert additional data elements, the additional data elements are automatically assigned to the previously-utilized data source and data set, and a list of fields from the automatically assigned data set is displayed in a user-selectable list. This saves the user from having to select a desired data set and desired data source.
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