字符串和整数比较 [英] String and int comparison

问题描述

foreach (String entry in GetPageParams().AllKeys)
               {
                   id = Convert.ToInt32(GetPageParams<string>("hdnHistorySave"));
                   if (entry.StartsWith("txtMessage"))
                   {
                       TicketId = entry.ToString().Substring(10);
                       if (id == Convert.ToInt32(TicketId))
                       {
                           objTicket.TicketDetailId = id;
                           objTicket.Message = GetPageParams<string>("txtMessage"+id);

                       }
                   }
               }

有可能这样做吗?因为在id == TicketId正在检查..时出现错误(输入字符串格式不正确")，请帮忙！

Is it possible to do like this?? Because am getting an error ("input string not i correct format") at the id==TicketId Checking .. Please help !

推荐答案

您可以比较两个值相同类型.
如果您有字符串"12"和数字2，则可以将字符串转换为数字，然后将其与2进行比较.

如果您的字符串是"A12"，那么您将无法将其转换为数字.

为避免在将字母数字字符串转换为数字时出错，可以使用T ryParse 方法 [^ ].这将帮助您避免转换时出错.

You can compare two values of the same type.
If you have a string "12" and a number 2, you can convert the string to a number and then compare it with 2.

If your string is "A12", then you won''t be able to convert this to a number.

To avoid an error while converting an alphanumeric string to a number, you can use the TryParse method[^]. This will help you avoid an error while conversion.

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