使用c#设置asp.net中每行的最小字符限制

I want to set the limit min. 5 characters per line and
我想设置每行5个字符的限制
I want to show message if multiline textbox have less than 5 chars. line.
如果多行文本框的字符数小于5，我想显示消息。线。

Here is my code.

这是我的代码。

string[] temp = Regex.Split(KeywordList.Text, "\r\n");
for (int i = 0; i < temp.Length; i++)
{
    if (temp[i].Length <= 4) //check characters limit
    {
        Response.Write("Please enter min 5 characters per line");
    }
    else
    {
        Response.Write("success");
    }
}

My textbox contains min. 5 characters in few lines but above code show "success".

我的文本框在几行中包含5个字符，但上面的代码显示“成功”。

Can anyone help me to detect less than 5 characters row.

谁能帮我检测不到5个字符的行吗?

Thanks in advance, sorry for my bad English.

提前谢谢，对不起，我的英语不好。

1 个解决方案

#1

I suggest using Linq: Split the initial string (please, do not put magic values like "\r\n", but Environment.NewLine) and check if Any item is 4 characters or less:

我建议使用Linq:分割初始字符串(请不要使用像“\r\n”这样的魔法值，而是使用Environment.NewLine)，并检查任何项是否为4个字符或更少:

   if (KeywordList
         .Text
         .Split(new string[] {Environment.NewLine}, StringSplitOptions.None)
         .Any(item => item.Length <= 4)) 
     Response.Write("Please enter min 5 characters per line");
   else
     Response.Write("success");

In your current code Regex.Split is an overshoot (String.Split is enough), and it seems that you should add break after Response.Write("Please enter min 5 characters per line"); line:

在当前代码Regex中。分割是超调(字符串)。拆分是足够的)，并且似乎您应该在响应之后添加break。写(“请每行输入5个字符”);线:

   ...
   if (temp[i].Length <= 4) //check characters limit
   {
      Response.Write("Please enter min 5 characters per line");

      break; // <- we have an error, no need to check more lines
   }
   ...

Edit: If you are not sure in delimiters (they can be \n - Unix, \r\n - Windows, \n\r - Mac etc.) you can try several ones in one call

编辑:如果您不确定在定界器(它们可以是\n - Unix、\r - \n - Windows、\n - \n - r - Mac等)，您可以在一次调用中尝试几个

   if (KeywordList
         .Text
         .Split(new char[] {'\r', '\n'}, StringSplitOptions.RemoveEmptyEntries)
         .Any(item => item.Length <= 4)) 
     Response.Write("Please enter min 5 characters per line");
   else
     Response.Write("success");

However, we have to eliminate empty items: for "a\r\n\b" we want ["a", "b"], not ["a", "", "b"]

然而，我们必须消除空项目:对于“a\r\n\b”，我们想要“a”、“b”，而不是“a”、“b”

#1