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Line 11:
Line 11: + + + + + + Line 25:
Line 31: − + − Crop crop = null;+ − + − bool deadA = crop?.dead;+ − bool? deadB = crop?.dead; − − + − +
Modding:Migrate to Stardew Valley 1.3 (view source)
Revision as of 04:21, 14 March 2018
, 04:21, 14 March 2018→Net types: simplify null caveat example
Usage notes:
Usage notes:
<ul>
<ul>
<li>Many net fields have a standard property to access them. Use those when possible to simplify your code and avoid net field gotchas:
<source lang="c#">
Game1.player.name // NetString
Game1.player.Name // string
</source>
</li>
<li>You can implicitly cast net types to their standard equivalent:
<li>You can implicitly cast net types to their standard equivalent:
<source lang="c#">
<source lang="c#">
crop.dead.Set(true);
crop.dead.Set(true);
</source></li>
</source></li>
<li>Net types can't handle implicit casting for value types when using null-conditional operators. Always check for null before comparing or implicitly casting to a value type:
<li>Net types can't handle implicit casting on null net fields. Always check for null before comparing or implicitly casting to a value type:
<source lang="c#">
<source lang="c#">
NPC villager = null;
// all of these crash: 'System.NullReferenceException' in Netcode.dll
// crash: 'System.NullReferenceException' in Netcode.dll
if (villager?.name == "Abigail")
if (crop?.dead == true)
// this are okay
// this is okay
if (crop?.dead != null && crop?.dead == true)
if (villager != null && villager.name == "Abigail")
</source></li>
</source></li>
</ul>
</ul>