如何在c＃中从文本框中拆分数字 [英] how to split number from textbox in c#

问题描述

嗨
i有一个文本框，我的文本框中有一些数字像这样

Hi i have a text box and i have some numbers in my text box like this

4*4*4*4*4*4*4*4*4*7*4*4*4*7*4*4*4*4*7*4*10*4*4*4*7*4*10*13*0,0,4,0,4,3,0,4,3,0,0,4,3,0,4,0,4,3,0,4,0,0,4,3,0,4,0,4,0,4,3,0,4,0,4,4,0,4,3,0,4,0,4,4,-1,

现在我想把它们拆分成这样的

有*的数字，我想逐个计算这些数字+5并且，一个接一个地+2并将它们写在另一个文本框中

这是我的代码

now i want to split them like this
number which has "*", i want to calculate one by one of those number + 5 and "," one by one +2 and write them in another textbox
and this is my code

foreach (var c in richTextBox6.Text)
{
    string a = c.ToString();
    string[] b = a.Split('*');
    richTextBox7.Text += b[a.Length - 1];
}

但它只是spli*和，

如何逐个计算这些数字？

尊重

but it just spli "*" and ","
how calculate those numbers one by one?
With Respect

推荐答案

使用 Linq [ ^ ]：

Using Linq[^]:

string s = RichTextBox6.Text;
//in this example: 4*4*4*4*4*4*4*4*4*7*4*4*4*7*4*4*4*4*7*4*10*4*4*4*7*4*10*13*0,0,4,0,4,3,0,4,3,0,0,4,3,0,4,0,4,3,0,4,0,0,4,3,0,4,0,4,0,4,3,0,4,0,4,4,0,4,3,0,4,0,4,4,-1,
var addAndFive = s.Split(',')[0].Split('*').Sum(x=>Convert.ToInt32(x)+5);
//returns: 290
var addAndTwo = s.Split(',').Skip(1).Sum(x=>x == string.Empty ? 0 : Convert.ToInt32(x)+2);
//returns: 180

你可以用+5+代替*，用+2+和构建数学表达式，然后你可以使用数学表达式评估器库，如 http://ncalc.codeplex.com/ [ ^ ]评估最终结果。



或没有其他图书馆 [ ^ ]

you can replace * with +5+ and , with +2+ and build math expression, then you can use mathematical expression evaluator library like http://ncalc.codeplex.com/[^] to evaluate final result.

or without other library [^]

void Main()
{
	string input ="4*4,4,-4";
	input= input.Replace("*", "+5+");
	input =input.Replace(",", "+2+"); //4+5+4+2+4+2+-4
	var result = Evaluate(input); //17
}

double Evaluate(string expression)
{
	DataTable table = new DataTable();
	table.Columns.Add("expression", typeof(string), expression);
	DataRow row = table.NewRow();
	table.Rows.Add(row);
	return double.Parse((string)row["expression"]);
}

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