Specifies the method used to determine the data type of columns.

Possible Values

Data Type

string

Default Value

"RowScan"

Remarks

This property defines the strategy for determining column data types:

• None: All columns are returned as string types. Column names are still scanned when Header=True, even with this setting.
• RowScan: Rows are scanned to heuristically infer data types based on their content. The depth of the scan is controlled by the RowScanDepth property.

By default, RowScanDepth is used if no value is explicitly specified. Use None for simplicity when data type inference is not required or when consistent string typing is preferred.