... Microsoft SQL Server Books Online. The GetSchemaTable( ) method of the DataReader also returns all column lengths. The method returns a DataTable containing column metadata for a DataReader, ... to a Hashtable keyed on the column name. The code then iterates over the collection of columns in the table and displays the length, precision, and scale for each from the Hashtable. Information ... SqlDataAdapter da = new SqlDataAdapter(sqlText, conn); // Add table mappings. da.TableMappings.Add(" ;Table& quot;, "Orders"); da.TableMappings.Add(" ;Table1 ", "Order Details");...