将文本文件内容传递给 Form 2

本文介绍了将文本文件内容传递给 Form 2的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

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我需要帮助.我有两种形式.一个表单包含带有磁盘上文本文件的列表框，但第二个表单必须显示从表单 1 中的列表框中选择的文件的内容.表单 1 中的列表框和表单 2 中的 RichTextBox 都已公开.

I need help. I have two fomrs. One form contains listBox with text files on disk but the second form must display content of the file selected from listBox from form 1. The listBox from Form1 and richTextBox from Form2 are public allready.

namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    Form2 form2;
    public Form1()
    {
      InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
      string folder = @"D:\";
      string[] txtfiles = Directory.GetFiles(folder, "*.txt");
      listBox1.Items.AddRange(txtfiles);
    }

    private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
      form2 = new Form2();
      form2.Show();
    }
  }
}

表格 2

namespace WindowsFormsApplication1
{
  public partial class Form2 : Form
  {
    Form1 form1;
    public Form2()
    {
      InitializeComponent();
    }

    private void Form2_Load(object sender, EventArgs e)
    {
      StreamReader sr = new StreamReader("");
      //TODO
    }
  }
}

推荐答案

我将文件名传递给 Form2 的构造函数，而不是对 Form1 的引用:

Instead of a reference to Form1, I would pass the file name into the constructor of Form2:

public partial class Form2 : Form
{
  public Form2(string fileName)
  {
    InitializeComponent();
    textBox1.Text = File.ReadAllText(fileName);
  }
}

然后在您的调用方法中:

then in your calling method:

form2 = new Form2(listBox1.SelectedItem.ToString());
form2.Show();

这篇关于将文本文件内容传递给 Form 2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！