C# pictureBox.Image獲得圖片的三種方法

1.絕對路徑: 
this.pictureBox.Image=Image.FromFile("C:\\test.jpg"); 
 
2.相對路徑: 
Application.StartupPath;  
可以得到程序根目錄  
this.pictureBox.Image=Image.FromFile(Application.StartupPath "\\test.jpg"); 
 
3.獲得網絡圖片的路徑 
string url="http://img.zcool.cn/community/01635d571ed29832f875a3994c7836.png@900w_1l_2o_100sh.jpg";
this.pictureBox.Image= Image.FromStream(System.Net.WebRequest.Create(url).GetResponse().GetResponseStream());