我试图在二进制文件中读取2个值,并将第1个值放在文本框3中,将第2个值放在文本框4中。需要从文件中读取的2个值是使用文本框1和2创建的并使用第一个按钮保存到文件。在点击按钮2时,它应该读取文件并将值放在正确的位置。我不确定它是否读数不正确或是否写得不正确。当我点击按钮阅读并显示框时显示: System.Collections.Generic.List`1 [test.Form1 +矿石]
代码如下:
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;
using System.Runtime.Serialization.Formatters.Binary;
namespace test
{
public partial class Form1 : Form
{
[Serializable]
public class ore
{
public float Titan;
public float Eperton;
}
ore b1 = null;
ore b2 = null;
public Form1()
{
InitializeComponent();
b2 = new ore();
b1 = new ore();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
// 1st text box input is float
float tempFloat;
if (float.TryParse(textBox1.Text, out tempFloat))
{
b1.Titan = tempFloat;
}
else
MessageBox.Show("uh oh");
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
// 2nd text box input is float
float tempFloat;
if (float.TryParse(textBox1.Text, out tempFloat))
{
b2.Eperton = tempFloat;
}
else
MessageBox.Show("uh oh");
}
private void button1_Click(object sender, EventArgs e)
{
// supposed to save list to file
List<ore> oreData = new List<ore>();
oreData.Add(b1);
oreData.Add(b2);
FileStream fs = new FileStream("ore.dat", FileMode.Create);
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(fs, oreData);
fs.Close();
}
private void textBox3_TextChanged(object sender, EventArgs e)
{
// 3rd text box
}
private void textBox4_TextChanged(object sender, EventArgs e)
{
//4th text box
}
List<ore> books = new List<ore>(); // create list
private void button2_Click(object sender, EventArgs e)
{
FileStream fs = new FileStream("ore.dat", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
List<ore> books = (List<ore>)bf.Deserialize(fs);
fs.Close();
if (books.Count > 1)
{
textBox3.Text = books.ToString();//update the 3rd text box
textBox4.Text = books.ToString();//update the 4th text box
}
}
}
}
答案 0 :(得分:1)
我想知道你是否真的问过你想要什么,因为你在评论中有效地回答了你自己的问题......
List<ore> books = new List<ore>(); // create list
private void button2_Click(object sender, EventArgs e)
{
FileStream fs = new FileStream("ore.dat", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
List<ore> books = (List<ore>)bf.Deserialize(fs);
fs.Close();
if (books != null)
{
if (books.Count > 0)
textBox3.Text = books[0].SomeProperty.ToString();//update the 3rd text box
if (books.Count > 1)
textBox4.Text = books[1].SomeProperty.ToString();//update the 4th text box
}
}
请注意使用 SomeProperty - 这是因为books
中的每个项目都是对象ore
的一个实例,因此您需要替换相应的属性(Titan)或{Eperton)来自ore
代替我的 SomeProperty 占位符..如果您只是ToString()
ore
,那么您将获得该名称的ToString()
键入字符串,而不是其中的任何单个值 - 除非您已覆盖{{1}}。