iReport Ultimate Guide - Nimsoft Library

Subreports3. Click the Add button to create the new return value; the Add/Modify variable dialog will appear (Figure 10-16):Figure 10-16 The Subreport Return Value Definition dialog4. Select a calculated value from the subreport’s built-in variables (REPORT_COUNT), as well as the local variable that willcontain the values returned by the variable (SUBREPORT_COUNT).5. Next, select a calculation type.If you want a subreport value to be returned as-is, select the type Nothing. Otherwise, several calculation types can beselected. For example, if the desired value is the average of the number of records within a subreport that is invokedrepeatedly, set the calculation type to Average.In your master report, when you created a new variable to be used like a container for a returned value, you set thevariable calculation type to System. The effective calculation type performed on the variable values is the onedefined in the dialog box shown in Figure 10-16.The value coming from the subreport is available only when the whole band containing the subreport is printed. If you need toprint this value using a textfield placed in the same band as your subreport, set the evaluation time of the textfield to Band(Figure 10-17).Figure 10-17 A textfield showing the return value (with evaluation time set to Band)The report preview should look like the one in Figure 10-18.163