idea ParameterType property writable in ArcGIS Pro Ideas https://community.esri.com/t5/arcgis-pro-ideas/parametertype-property-writable/idi-p/955968 <HTML><HEAD></HEAD><BODY>It would be quite useful if the ParameterType property in ToolValidator was also writable, not read-only as it is now.<BR />When you can disable a parameter, it should be possible to make it optional!<BR />:-) <!-- content transformation source ID: 087E0000000kBw3 --> </BODY></HTML> Tue, 01 Mar 2016 13:32:17 GMT ΠαναγιώτηςΠαπάζογλου 2016-03-01T13:32:17Z ParameterType property writable https://community.esri.com/t5/arcgis-pro-ideas/parametertype-property-writable/idi-p/955968 <HTML><HEAD></HEAD><BODY>It would be quite useful if the ParameterType property in ToolValidator was also writable, not read-only as it is now.<BR />When you can disable a parameter, it should be possible to make it optional!<BR />:-) <!-- content transformation source ID: 087E0000000kBw3 --> </BODY></HTML> Tue, 01 Mar 2016 13:32:17 GMT https://community.esri.com/t5/arcgis-pro-ideas/parametertype-property-writable/idi-p/955968 ΠαναγιώτηςΠαπάζογλου 2016-03-01T13:32:17Z Re: ParameterType property writable - Status changed to: Closed https://community.esri.com/t5/arcgis-pro-ideas/parametertype-property-writable/idc-p/1376062#M28224 <P>While we can't change the parameter type property, there is an approach to mimic the behavior you're looking for.&nbsp;</P><P>The strategy is to flip this around, and define the parameter as optional. And then in the tool's validation code, using your specific criteria, make the parameter appear required through validation, by forcing a parameter error. If you use either the 530 or 735 error ID in validation, the parameter will then show as required.</P><P>There's more information here in the <A href="https://pro.arcgis.com/en/pro-app/latest/arcpy/classes/parameter.htm" target="_self">Parameter</A> topic:</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="DavidWynne_0-1706641833349.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/93215i9A878E0351D4384C/image-size/medium?v=v2&amp;px=400" role="button" title="DavidWynne_0-1706641833349.png" alt="DavidWynne_0-1706641833349.png" /></span></P><P>&nbsp;</P><P>-Dave</P> Tue, 30 Jan 2024 19:14:07 GMT https://community.esri.com/t5/arcgis-pro-ideas/parametertype-property-writable/idc-p/1376062#M28224 DavidWynne 2024-01-30T19:14:07Z