Fix WinUI demo null ref exception after cancelling file picker.

holance · holance · commit 7313c26a660b · 2022-11-12T23:32:19.000-08:00
diff --git a/Source/Examples/WinUI/ModelViewer/Services/FilePickerService.cs b/Source/Examples/WinUI/ModelViewer/Services/FilePickerService.cs
@@ -29,7 +29,7 @@ public async Task<string> StartFilePicker(string[] filters)
             picker.FileTypeFilter.Add(filter);
         }
         return await picker.PickSingleFileAsync().AsTask().ContinueWith((result) => {
-            return result is null ? string.Empty : result.Result.Path;
+            return result is null || result.Result is null ? string.Empty : result.Result.Path;
         });
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,7 @@ public async Task<string> StartFilePicker(string[] filters)`
`29`	`29`	`picker.FileTypeFilter.Add(filter);`
`30`	`30`	`}`
`31`	`31`	`return await picker.PickSingleFileAsync().AsTask().ContinueWith((result) => {`
`32`		`- return result is null ? string.Empty : result.Result.Path;`
	`32`	`+ return result is null \|\| result.Result is null ? string.Empty : result.Result.Path;`
`33`	`33`	`});`
`34`	`34`	`}`
`35`	`35`	`}`