添加项目文件。

Szmedi.Toolkit.Revit/Assists/NotEmptyValidationRule.cs

@@ -0,0 +1,14 @@
+using System.Globalization;
+using System.Windows.Controls;
+
+namespace Szmedi.Toolkit.Revit.Assists;
+
+public class NotEmptyValidationRule : ValidationRule
+{
+    public override ValidationResult Validate(object value, CultureInfo cultureInfo)
+    {
+        return string.IsNullOrWhiteSpace((value ?? string.Empty).ToString())
+            ? new ValidationResult(false, "不能为空。")
+            : ValidationResult.ValidResult;
+    }
+}