Fields added to the Crystal Report

In the past, when my colleagues made the crystal report, they had to re-draw fields after they had finished the painting. Because I have painted the crystal report many times and discussed it many times, I don't believe Microsoft has made the crystal report so bad, after studying the Crystal Report, I used to delete the data source and re-draw the report every time the report field was changed, so that the report fields could not match, in fact, there is a data source location in the crystal report. After adding the dataset field, set the data source location in the field manager of the report and select the current table and the data source table, click the update button on the right. After the update, the fields in the field manager are automatically updated without affecting the fields already drawn.