namespace _9.图片的上一张和下一张
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e) { pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; pictureBox1.Image = Image.FromFile(@"C:\Users\Administrator.USER-20180925HC\Desktop\pic\1.jpg"); } //获得图片文件夹的全路径 string[] path=Directory.GetFiles(@"C:\Users\Administrator.USER-20180925HC\Desktop\pic"); int i=0; private void btnDownPic_Click(object sender, EventArgs e) { i++; if (i == path.Length) { i = 0; } pictureBox1.Image = Image.FromFile(path[i]); } private void btnUpPic_Click(object sender, EventArgs e) { i--; if (i < 0) { i = path.Length - 1; } pictureBox1.Image = Image.FromFile(path[i]); }}

}