打开文件对话框

Posted on 2019-03-28 17:04  金色的省略号  阅读(121)  评论(0)  编辑  收藏  举报 
 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Threading.Tasks;
 9 using System.Windows.Forms;
10 using System.IO;
11 using System.Security;
12 
13 namespace OpenFile
14 {
15     public partial class OpenFileDialogForm : Form
16     {
17         // 字段
18         private Button selectButton; // 按钮
19         private OpenFileDialog openFileDialog1; // 打开文件对话框    
20         private TextBox textBox1; // 文本编辑框
21 
22         //窗体构造函数
23         public OpenFileDialogForm()
24         {         
25             //新建打开文件对话框
26             openFileDialog1 = new OpenFileDialog();
27 
28             //新建按钮
29             selectButton = new Button
30             {
31                 Size = new Size(100, 20),
32                 Location = new Point(15, 15),
33                 Text = "Select file"
34             };
35             
36             //添加, 按钮Click事件处理
37             selectButton.Click += new EventHandler(SelectButton_Click);
38 
39             //新建文本编译框
40             textBox1 = new TextBox
41             {
42                 Size = new Size(300, 300),
43                 Location = new Point(15, 40),
44                 Multiline = true,
45                 ScrollBars = ScrollBars.Vertical
46             };
47             
48             //窗体大小
49             ClientSize = new Size(330, 360);
50             
51             //窗体容器, 添加按钮、文本编译框
52             Controls.Add(selectButton);
53             Controls.Add(textBox1);
54         }
55 
56         //文本复制
57         private void SetText(string text)
58         {
59             textBox1.Text = text;
60         }
61 
62         //按钮Click事件处理函数
63         private void SelectButton_Click(object sender, EventArgs e)
64         {
65             if (openFileDialog1.ShowDialog() == DialogResult.OK)
66             {
67                 try
68                 {
69                     //新建读取文件流对象
70                     var sr = new StreamReader(openFileDialog1.FileName);
71                     //文本复制
72                     SetText(sr.ReadToEnd());
73                 }
74                 catch (SecurityException ex)
75                 {
76                     MessageBox.Show("Security error.\n\nError message: {ex.Message}\n\n" +
77                     "Details:\n\n{ex.StackTrace}");
78                 }
79             }
80         }
81     }
82 }