必填

Activity Creator

生成的代码

在“缓存元数据”中为所有必需的属性生成设计时验证。这意味着除非为这些字段提供值，否则工作流将不会运行。

...
  
 #region Protected Methods
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
  if (FirstNumber == null) metadata.AddValidationError(string.Format(Resources.ValidationValue_Error, nameof(FirstNumber)));
  if (SecondNumber == null) metadata.AddValidationError(string.Format(Resources.ValidationValue_Error, nameof(SecondNumber)));
  base.CacheMetadata(metadata);
}
......
  
 #region Protected Methods
protected override void CacheMetadata(CodeActivityMetadata metadata)
{
  if (FirstNumber == null) metadata.AddValidationError(string.Format(Resources.ValidationValue_Error, nameof(FirstNumber)));
  if (SecondNumber == null) metadata.AddValidationError(string.Format(Resources.ValidationValue_Error, nameof(SecondNumber)));
  base.CacheMetadata(metadata);
}
...