如何在文本框中拆分字符串并添加值？ [英] How do I split a string in a textbox and add the values?

问题描述

private void calctxt_KeyDown(object sender, KeyEventArgs e)
        {
            double Total;
            string[] numbers = calctxt.Text.Split('+');
            Total = 0;
            foreach(string value in numbers)
            {
                Total = Total + numbers(num)
            }

如何填写此字符串以添加+符号之间的所有数字？



我有什么试过：

How would I complete this string to add all the numbers between the + signs?

What I have tried:

private void calctxt_KeyDown(object sender, KeyEventArgs e)
        {
            double Total;
            string[] numbers = calctxt.Text.Split('+');
            Total = 0;
            foreach(string value in numbers)
            {
                Total = Total + numbers(num)
            }

我如何填写此字符串以添加+符号之间的所有数字？

How would I complete this string to add all the numbers between the + signs?

推荐答案

尝试这样的事情：

Try something like this:

using System;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine(Compute());
	}
	
	private static string Compute(){
		string message = string.Empty;
		bool isValid = true;
			double result = 0;
		    string sampleText = "2+5+1+6+3+2+1";
		    string delimtedValue = "+";
		
		    if(sampleText.Contains(delimtedValue)){
				string[] numbers = sampleText.Split(delimtedValue.ToCharArray());
				double val;

				foreach(string num in numbers)
				{
					if (!double.TryParse(num, out val))
					{
						message ="Unable to compute. String has invalid numeric values";
						isValid = false;
						break;

					}

					result = result + val;
				}
			}
		    
		if(!isValid)
			return message;
		else
			return string.Format("The total sum is: {0}", result);
	}
}

您需要使用 double.TryParse [ ^ ]

You need to convert the strings to numbers inside your loop, using double.TryParse[^]

double val;
if (!double.TryParse(value, out val))
   {
   ... report problem to user ...
   return;
   }

然后你可以将它们添加到你的总数中。

You can then add them into your total.

private void textBox1_KeyUp(object sender, KeyEventArgs e)
       {
           double Total;
           string[] numbers = textBox1.Text.Split('+');
           Total = 0;
           foreach (string value in numbers)
           {
               if (!string.IsNullOrEmpty(value))
               {
                   Total = Total + Convert.ToDouble(value);
               }
           }

           textBox2.Text = Total.ToString();
       }

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