c # Picturebox path

 picHeadImg.ImageLocation = string.Format("http://img3.imgtn.bdimg.com/it/u=4160106393,1595591376&fm=214&gp=0.jpg");
 // picHeadImg.Image = Image.FromStream(WebRequest.Create(head_img).GetResponse().GetResponseStream());

  picHeadImg.Image = Properties.Resources.DefulatHeadImg;

picHeadImg.Load (pathname) 


1. absolute path: 
this.pictureBox.Image the Image.FromFile = ( "C: \\ test.jpg"); 
 
2. the relative path: 
Application.StartupPath;   
get root directory   
this.pictureBox. Image = Image.FromFile (Application.StartupPath "\\ test.jpg "); 
 
path 3. Access to the network picture 
 
string url = "http://img.zcool.cn/community/01635d571ed29832f875a3994c7836.png@900w_1l_2o_100sh.jpg"; 
= Image.FromStream this.pictureBox.Image (System.Net.WebRequest.Create (URL) .GetResponse () the GetResponseStream ().); 


// save

 SaveFileDialog save = new SaveFileDialog();
save.ShowDialog();
if (save.FileName != string.Empty)
 {
   picHeadImg.Image.Save(save.FileName);
 }  

 // asynchronous load image, the image loaded txtURI
 pictureBox1.LoadAsync (txtURI.Text); 



Private void pictureBox1_LoadProgressChanged (Object SENDER, ProgressChangedEventArgs E) 
        { 
            // display progress 
            this.lblMsg.Text = string.Format ( "Current Progress: {0 } ", e.ProgressPercentage);. 
        } 

        Private void pictureBox1_LoadCompleted (Object SENDER, AsyncCompletedEventArgs E) 
        { 
            // event handling load error 
            IF (e.Error = null)! 
            { 
                lblMsg.Text =" error message: "+ e.Error .Message; 
                return; 
            } 
            // If canceled 
            IF (e.Cancelled) 
            {
                lblMsg.Text = "operation was canceled."; 
            } 
            the else 
            { 
                lblMsg.Text = "loaded."; 
            } 
            button1.Enabled = to true; 
        }