c# 图片文件读取

Question

 FileStream fs = null; 
        byte[] buffer = null;
    string filename = "P6.jpg";
       string serverpath = Server.MapPath("~/images/UpLoad/") + filename;
      
        try
        {
            if (File.Exists(serverpath)) //图片文件的全路径字符串
            {
                Response.Write(serverpath);
                fs = new FileStream(serverpath, FileMode.Open);
                buffer = new byte[fs.Length];
                fs.Read(buffer, 0, int.Parse(fs.Length.ToString()));
                fs.Close();
                fs.Dispose();
            }
        }
        catch
        {
            Response.Write("not Exist");
            fs.Close();
            fs.Dispose();
        }
       // return buffer;//图片文件的流不报错，路径也对，在线求教

Answer 1

try            {                WebRequest request = WebRequest.Create(Url);                WebResponse response = request.GetResponse();                Stream reader = response.GetResponseStream();                FileStream writer = new FileStream(“你要保存的路径”, FileMode.OpenOrCreate, FileAccess.Write);                byte[] buff = new byte[512];                int c = 0; //实际读取的字节数                while ((c = reader.Read(buff, 0, buff.Length)) > 0)                {                    writer.Write(buff, 0, c);                }                writer.Close();                writer.Dispose();                reader.Close();                reader.Dispose();                response.Close();}            catch (Exception ex)            {            }

Answer 2

参考下面代码：
try            {                
WebRequest request = WebRequest.Create(Url);               
 WebResponse response = request.GetResponse();                
Stream reader = response.GetResponseStream();               
 FileStream writer = new FileStream(“你要保存的路径”, FileMode.OpenOrCreate, FileAccess.Write);                
byte[] buff = new byte[512];                
int c = 0; //实际读取的字节数                
while ((c = reader.Read(buff, 0, buff.Length)) > 0)                {                    
writer.Write(buff, 0, c);               
 }                
writer.Close();               
 writer.Dispose();             
   reader.Close();              
  reader.Dispose();                
response.Close();}            
catch (Exception ex)           
 {      
      
}

Answer 3

程序不报错应该是最好的情况了，想问楼主你想问什么，即使报错了，也被你 catch 并丢弃了，你在干嘛？

Answer 4

你最好可以dubug看看，你在界面是否看到了  not Exist这句话的，如果有就说明代码报错了