To create a report parameter in Aspose.Cells.Report.Designer, follow the steps below:

1. Open MS Excel
2. Click Report Parameter on the Aspose.Cells.Report.Designer toolbar.
3. In the dialog box, all the Report parameters are listed in the left panel. Click Add button.

4. In the dialog box, input the report parameter information. The valid values for a report parameter may come from a dataset or a group of values defined by user. A Report parameter has two data fields: label field and value field, where the value of label field is allowed to be null. Click Setup button to setup a group of values for the report parameter.

5. Input the value of Label filed and Value field. Click Add button.

6. Repeat the step (5) to add other values for the report parameter and click Close button.

7. Click Save button to save the report parameter.

8. The newly-created report parameter is listed in the left panel.