<1>将图片转换成二进制插入数据库
FileStream fs = new FileStream("D:\\Add.ico",FileMode.Open);
byte[] imagebytes = new byte[fs.Length];
BinaryReader br = new BinaryReader(fs);
imagebytes = br.ReadBytes(Convert.ToInt32(fs.Length)); //将图片转换成二进制字符串
string s = "Data Source=A3135;Initial Catalog=mydb1;Integrated Security=True"; //连数据库字符串
SqlConnection con = new SqlConnection(s);
con.Open();
string str = " insert into [picture](Line,Data) values(@Line,@Data)"; //插入picture表中字符串
SqlCommand cmd = new SqlCommand(str, con);
cmd.Parameters.AddWithValue("@Line", 1);
cmd.Parameters.AddWithValue("@Data", imagebytes); //将二进制流插入数据库中
cmd.ExecuteNonQuery();
con.Close();
<2>将二进制还原为图片
MemoryStream ms = new MemoryStream(photo);
Bitmap bmpt = new Bitmap(ms); //将二进制流转化成图片格式
SickPicture.Image = bmpt; //SickPicture为pictureBox控件名称
<3>依据图片路径显示图片
Image image = Image.FromFile(PicturePath); //直接打开会出现再次添加时提示图片资源占用
Image bmp = new Bitmap(image);
SickPicture.Image = bmp;
image.Dispose();
<4>PictureBox绑定图片的等比缩放
将pictureBox的SizeMode属性设置为StretchImage