c#

2019-11-08 02:30:17

字体：大中小

来源：转载

供稿：网友

是按照MSDN教程写的。添加控件： picturebox1,openfiledialog1,colordialog1,4个button(分别命名：close,background,clear,show_picture),checkbox1(命名：stretch)

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

namespace tutorial1_picture_viewer { public partial class Form1 : Form {

// this.enter += new System.Windows.Forms.KeyPRessEventHandler(this.enter); public Form1() { InitializeComponent(); } private void showButton_Click(object sender, EventArgs e) { if (openFileDialog1.ShowDialog()==DialogResult.OK) { pictureBox1.Load(openFileDialog1.FileName); } } private void clearButton_Click(object sender, EventArgs e) { pictureBox1.Image = null; } private void backgroundButton_Click(object sender, EventArgs e) { if (colorDialog1.ShowDialog() == DialogResult.OK) pictureBox1.BackColor = colorDialog1.Color; } private void closeButton_Click(object sender, EventArgs e) { this.Close(); } private void checkBox1_CheckedChanged(object sender, EventArgs e) { if (checkBox1.Checked) pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; else pictureBox1.SizeMode = PictureBoxSizeMode.Normal; } private void enter(object sender, KeyEventArgs e)//事件设置在form上，form的keyPreview属性要设置成true { if (e.KeyValue == 13) { //按下enter键后，自动打开文件选择框 e.Handled = true; openFileDialog1.ShowDialog(); pictureBox1.Load(openFileDialog1.FileName); } if (e.KeyValue == 27) {//按下esc后，自动关闭文件选择框 e.Handled = true; this.DialogResult = DialogResult.Cancel;//这个要注意 } } private void entershowButton_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == 13) { e.Handled = true; openFileDialog1.ShowDialog(); } } private void Form1_Load(object sender, EventArgs e) { }}

}

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