C# winform 单击按钮防止多次实例化（在线等）
一个单击按钮，希望list中值可以多次添加，但每次单击都会重新实例化，导致智能访问mlist[0]
List<ImageListshow> mlist=new List<ImageListshow>();
ImageListshow show1 = new ImageListshow();
//show1.path = Connection.ConnectionPicture();
show1.path = Image.FromFile(Connection.ConnectionPicture());
show1.save = true;
mlist.Add(show1);
//pictureBox_get1.Image= mlist[0].path;
string pictureBox = "pictureBox_get";
pictureBox = pictureBox + i;
PictureBox pb1 = (PictureBox)this.Controls.Find(pictureBox, true)[0];
pb1.Image = mlist[0].path;
[解决办法]
把你的List<ImageListshow> mlist作为成员变量写在你的类里面：
class AClass
{
//成员变量
List<ImageListshow> mlist;
//构造方法
AClass()
{
List<ImageListshow> mlist=new List<ImageListshow>();
}
//其它成员函数
public void yourMethod()
{
mlist=new List<ImageListshow>();
ImageListshow show1 = new ImageListshow();
//show1.path = Connection.ConnectionPicture();
show1.path = Image.FromFile(Connection.ConnectionPicture());
show1.save = true;
mlist.Add(show1);
//pictureBox_get1.Image= mlist[0].path;
string pictureBox = "pictureBox_get";
pictureBox = pictureBox + i;
PictureBox pb1 = (PictureBox)this.Controls.Find(pictureBox, true)[0];
pb1.Image = mlist[0].path;
}
}
