public new string ToString()
{
var ret = $"{FieldName}: ";
if (this.ChangeType.HasValue)
{
if (this.ChangeType == 1)
{
ret = ret + $"新增:{NewValue}";
}
else
{
ret = ret + $"删除:{OldValue}";
}
}
else
{
if (OldValue.IsNullOrWhiteSpace())
{
ret = ret + "无";
}
else
{
ret = ret + OldValue;
}
ret = ret + " 改变为: ";
if (NewValue.IsNullOrWhiteSpace())
{
ret = ret + "无";
}
else
{
ret = ret + NewValue;
}
}
return(ret);
}
