C# 展示图片

 

关于OpenFileDialog的使用

为了方便同事在日常工作中很快速生成大量数据, 我做了文件拷贝的小工具:

其中用到了OpenFileDialog这个类,下面是关于这个类的一些用法!

OpenFileDialog类是用来选择文件位置的,

FolderBrowserDialog 类用来选择文件夹位置.

具体代码如下:

 

 

 

 

 

 

 

                                                            程

序截图

程序源码:

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

namespace copyFile
{
    public partial class Form1 : Form
    {
        String fileName;
        String folderName;
        String extendedName;
        String fileName1;
       
        public Form1()
        {
            InitializeComponent();
        }

        private void browse_Click(object sender,EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();                //new一个方法
            ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);  //定义打开的默认文件夹位置
            ofd.ShowDialog();          //显示打开文件的窗口
             fileName = ofd.FileName;               //获得选择的文件路径
             textBox1.Text = fileName;
             extendedName = Path.GetExtension(fileName);       //获得文件扩展名
             fileName1 = Path.GetFileName(fileName);           //获得文件名
        }

        private void folder_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog fbd = new FolderBrowserDialog();
            fbd.ShowDialog();
            folderName = fbd.SelectedPath;                     //获得选择的文件夹路径
            textBox3.Text = folderName;
        }

        private void ok_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.Trim().Length == 0)
            {
                MessageBox.Show("文件路径不能为空!");
                return;
            }
            if (textBox2.Text.Trim().Length == 0)
            {
                MessageBox.Show("复制数量不能为空!");
                return;
            }
            if (textBox3.Text.Trim().Length == 0)
            {
                MessageBox.Show("目标文件夹路径不能为空!");
                return;
            }
            String newFile;                   //定义存储的位置,和存储的名称
           
            for (int i = 1; i <= Convert.ToInt32(textBox2.Text); i++)                   //从textBox2中获取要复制的次数
            {
                newFile = folderName + "\\" + fileName1 +"_"+ i.ToString() + extendedName;

 

;       File.Copy(fileName, newFile, true);            //使用Copy复制文件, Copy(源文件位置,目标文件夹位置,是否可以覆盖同名文件)
            }
            MessageBox.Show("复制完成!");
        }
    }
}

 

补充:

//获取文件名
Path.GetFileName(OpenFileDialog.FileName)

//获取文件路径
Path.GetDirectoryName(OpenFileDialog.FileName)

//获取文件扩展名
Path.GetExtension(OpenFileDialog.FileName)

利用OpenFileDialog展示图片pictureBox1
pictureBox1的宽度和高度来自图片的大小

button下的程式碼為：

1 2 3 4 5 6 7 8

OpenFileDialog openFileDialog = new OpenFileDialog(); openFileDialog.Filter = "BMP(*.BMP)|*.bmp|" + "所有檔案|*.*"; if (openFileDialog.ShowDialog() == DialogResult.OK) {     pictureBox1.Width = Image.FromFile(openFileDialog.FileName).Width;     pictureBox1.Height = Image.FromFile(openFileDialog.FileName).Height;     pictureBox1.Image = Image.FromFile(openFileDialog.FileName); }