添加项目文件。

Sai.Toolkit.Mvvm/Attributes/UndefinedCharAttribute.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Text;
+
+namespace Sai.Toolkit.Mvvm.Attributes
+{
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
+    public class UndefinedCharAttribute : ValidationAttribute
+    {
+        public UndefinedCharAttribute(params char[] chars)
+        {
+            Chars = chars;
+        }
+
+        public char[] Chars { get; }
+
+        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+        {
+            //char[] chars = new[] { '\\', ':', '{', '}', '[', ']', '|', ';', '<', '>', '?', '`', '~' };
+            if (value != null)
+            {
+                foreach (var c in Chars)
+                {
+                    if (value.ToString().IndexOf(c) > -1)
+                    {
+                        return new ValidationResult($"输入字符不合法,名称不能包含字符:'\\ : [ ] | {{}}; < > ? ` ~");
+                    }
+                }
+            }
+            return ValidationResult.Success;
+        }
+    }
+}