一、调用打开文件对话框
1.选用openfiledialog1对话框控件。
2.定义一个文件名称,例如: private string
FileName;
3.代码调用
openFileDialog1.Filter =
"所有图像文件(*.bmp;*.gif.;*.jpg)|*.bmp;*.gif;*.jpg";
openFileDialog1.Title =
"打开文件"; //文件过滤;
openFileDialog1.ShowDialog(); //打开对话框;
FileName =
openFileDialog1.FileName; //对fileName进行赋值;
if (FileName !=
"") //对filename进行判断,不为空的情况下在picturebox中打开图片
{
FileName =
openFileDialog1.FileName;
Bitmap pic = new Bitmap(FileName);
pictureBox1.Image = pic;
}
二、图片放大缩小时自动产生滚动条
1.选用Panel控件,调整控件大小位置合适,并将Autoscroll属性更改为TRUE。
2.将picturebox控件拖放到panel控件上,可根据自己的需要选择picturebox的AutoMode属性。
//图片放大代码
int x, y;
x = pictureBox1.Location.X - 5;
if (pictureBox1.Location.Y <= 0){y = 0;}
else{y = pictureBox1.Location.Y - 4;}
pictureBox1.Location = new Point(x, y);
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
pictureBox1.Size = new Size(pictureBox1.Width + 10,
pictureBox1.Height + 14);
//图片缩小代码
int x, y;
x = pictureBox1.Location.X + 5;
if (pictureBox1.Location.X < 300){y = 0;}
else{y = pictureBox1.Location.Y + 4;}
pictureBox1.Location = new Point(x, y);
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
pictureBox1.Size = new Size(pictureBox1.Width - 10,
pictureBox1.Height - 14);
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