索引超出了数组的范围[重复]

Question

这个问题在这里已有答案：

What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it? 4个答案

首先，我不知道哪一个超出了规模。正如你所看到的，我已经把％放在了数组之外。这是我的代码，请不要因为任何幼稚的错误而责备我。如果您有关于更有效的加密方法的提示，我会打开

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
 using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Text;

namespace encrypting

    public partial class Form1 : Form
    
    string text;
    string key;

    public string calcXor(string a, string b)
    
        char[] charAArray = a.ToCharArray();
        char[] charBArray = b.ToCharArray();
        char[] result = new char[6];
        int len = 0;




        for (int i = 0; i < a.Length; i++)
        
            if (i != 0)
                result[i] = (char) ( ((int)charAArray[a.Length % i] ^ (int)charBArray[b.Length % i]) ) ; //error



        

        return new string(result);
    

    private void Crypt()
    
        char[] a;
        int i, sizeoftext = text.Length,j=0;
        string somestring ="";
        string key = textBox2.Text;
        StringBuilder sb = new StringBuilder(somestring);
        for(i=0;i<sizeoftext-1;i++)
        
            if (i == key.Length-1)
                j = 0;





        
        somestring = calcXor(text, key);


        if (File.Exists(textBox3.Text)) ;
        File.Create(textBox3.Text).Close();

        System.IO.File.WriteAllText(textBox3.Text, somestring);



    

    public Form1()
    

        InitializeComponent();
    

    private void Form1_Load(object sender, EventArgs e)
    

    

    private void label1_Click(object sender, EventArgs e)
    

    

    private void button1_Click(object sender, EventArgs e)
    


             text = File.ReadAllText(textBox1.Text);

        Crypt();


    

    private void textBox1_TextChanged(object sender, EventArgs e)
    
        key = this.Text;
    

    private void button2_Click(object sender, EventArgs e)
    

            OpenFileDialog fd = new OpenFileDialog();

            if (fd.ShowDialog() == DialogResult.OK)
            
                textBox1.Text = fd.FileName;
            

    

    private void textBox2_TextChanged(object sender, EventArgs e)
    

    

    private void label2_Click(object sender, EventArgs e)
    

    

    private void button3_Click(object sender, EventArgs e)
    
        FolderBrowserDialog fd = new FolderBrowserDialog();
        if(fd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        
            textBox3.Text = fd.SelectedPath;
            textBox3.Text = textBox3.Text +"\\" + textBox4.Text + ".txt";
        
    

    private void textBox4_TextChanged(object sender, EventArgs e)
    

    

    private void textBox3_TextChanged(object sender, EventArgs e)

请帮我。