Question

我不确定这里的问题是什么。我的程序可以读取“文本”并将其放在标题中而没有任何问题，但它崩溃并且在它之前不会改变大小或颜色。我试着向同学们寻求帮助，但是他们说我的所有代码都是正确的。

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

namespace RetrieveCustomizedForm
{
public partial class Form1 : Form
{
    const char DELIM = ',';
    string recordIn;
    string[] fields;


    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {

        const string FILENAME = "C:\\Exercise5\\Data.txt";
        stuff stuff1 = new stuff();
        FileStream inFile = new FileStream(FILENAME, FileMode.Open, FileAccess.Read);
        StreamReader reader = new StreamReader(inFile);
        recordIn = reader.ReadLine();
        reader.Close();
        inFile.Close();



        while (recordIn != null)
        {
            fields = recordIn.Split(DELIM);
            stuff1.color = fields[0];
            stuff1.size = fields[1];
            stuff1.text = fields[2];

            if (fields[0] == "red")
            {
                this.BackColor = System.Drawing.Color.Red;
            }
            if (fields[0] == "blue")
            {
                this.BackColor = System.Drawing.Color.Blue;
            }
            if (fields[0] == "yellow")
            {
                this.BackColor = System.Drawing.Color.Yellow;
            }
            if (fields[1] == "large")
            {
                this.Size = new System.Drawing.Size(500, 500);
            }
            if (fields[1] == "small")
            {
                this.Size = new System.Drawing.Size(300, 300);
            }
            this.Text = fields[2];

        }


    }

    class stuff
    {
        public string color { get; set; }
        public string size { get; set; }
        public string text { get; set; }
    }
}
}

Answer 1

字段：可能为空，文件结尾？任何文件打开错误？试图在后台打开时再次打开它？

Answer 2

更多信息可能会有所帮助。像其他人所说的那样，字段[0] - [2]的值是多少？你收到什么错误？在我看来，你会收到的一个错误是你的索引超出了fields数组的范围......给我们一些更多信息，我们可以更好地帮助你。

Answer 3

以这种方式试试

using (FileStream infile = new FileStream(FILENAME, FileMode.Open, FileAccess.Read))
{
    using (StreamReader reader = new StreamReader(infile))
    {
        string recordIn = reader.ReadLine();
        while (recordIn != null)
        {
            fields = recordIn.Split(DELIM);
            stuff1.color = fields[0];
            stuff1.size = fields[1];
            stuff1.text = fields[2];

            if (fields[0] == "red")
            {
                this.BackColor = System.Drawing.Color.Red;
            }
            if (fields[0] == "blue")
            {
                this.BackColor = System.Drawing.Color.Blue;
            }
            if (fields[0] == "yellow")
            {
                this.BackColor = System.Drawing.Color.Yellow;
            }
            if (fields[1] == "large")
            {
                this.Size = new System.Drawing.Size(500, 500);
            }
            if (fields[1] == "small")
            {
                this.Size = new System.Drawing.Size(300, 300);
            }
            this.Text = fields[2];

        }
    }

}

尝试从文本文件中调用时，GUI程序崩溃

3 个答案: