ASP.NET FileUploadアップロード画像インスタンス

 
  




 
  
 
  
 
  
 
  

 
  
 
  
 Text="Upload" /> 
  
   
  
ControlToValidate="FileUpload1" Display="Static" 
  
ErrorMessage="You should only can upload image file such as files with .jpg or gif extension" 
  
OnServerValidate="Image_validate">* 
  
 
  
 
  
 
  
 
 

Add to code behind cs file

 
  
using System; 
  
using System.Data; 
  
using System.Configuration; 
  
using System.Collections; 
  
using System.Web; 
  
using System.Web.Security; 
  
using System.Web.UI; 
  
using System.Web.UI.WebControls; 
  
using System.Web.UI.WebControls.WebParts; 
  
using System.Web.UI.HtmlControls; 
  
using System.IO; 
  
using System.Drawing; 
  
public partial class practice_FileUpload : System.Web.UI.Page 
  
{ 
  
protected void Page_Load(object sender, EventArgs e) 
  
{ 
  
} 
  
protected void btn_upload_Click(object sender, EventArgs e) 
  
{ 
  
if (Page.IsValid) 
  
{ 
  
string path = @Page.MapPath("User_Edit.aspx").Replace("User_Edit.aspx", "") + "Documents\\"; 
  
string s = path + Session["UserName"].ToString(); 
  
if (!System.IO.Directory.Exists(path + Session["UserName"].ToString())) 
  
{ 
  
System.IO.Directory.CreateDirectory(path + Session["UserName"].ToString()); 
  
} 
  
if (FileUpload1.HasFile) 
  
{ 
  
FileUpload1.SaveAs(Server.MapPath("~/Seeker/Documents/" + Session["UserName"].ToString() + "/" + this.FileUpload1.FileName)); 
  
} 
  
} 
  
} 
  
protected void Image_validate(object source, ServerValidateEventArgs args) 
  
{ 
  
string fileExt = Path.GetExtension(FileUpload1.FileName).ToLower(); 
  
string fileName = Path.GetFileName(FileUpload1.FileName); 
  
if (fileExt != ".jpg" && fileExt != ".gif") 
  
{ 
  
args.IsValid = false; 
  
} 
  
} 
  
protected void CustomValidator2_ServerValidate(object source, ServerValidateEventArgs args) 
  
{ 
  
Bitmap bmIP = new Bitmap(FileUpload1.PostedFile.InputStream); 
  
if (bmIP.Width > 100 | bmIP.Height > 100) 
  
{ 
  
args.IsValid = false; 
  
} 
  
else 
  
{ 
  
args.IsValid = true; 
  
} 
  
} 
  
} 
  
 
 

The default size of files uploaded by the FileUpload control is 4MB. This solution was found from the Internet.
FileUploadのデフォルトのアップロードファイルは最大4 MBです.これはネットで見つけたものです.
追加する場合はMachine.configで修正

 
  
executionTimeout = "110" [in Seconds][number 
  
maxRequestLength = "4096" [number] 
  
requestLengthDiskThreshold = "80" [number] 
  
useFullyQualifiedRedirectUrl = "false" [true|false] 
  
minFreeThreads = "8" [number] 
  
minLocalRequestFreeThreads = "4" [number] 
  
appRequestQueueLimit = "5000" [number] 
  
enableKernelOutputCache = "true" [true|false] 
  
enableVersionHeader = "true" [true|false] 
  
apartmentThreading = "false" [true|false] 
  
requireRootedSaveAsPath = "true" [true|false] 
  
enable = "true" [true|false] 
  
sendCacheControlHeader = "true" [true|false] 
  
shutdownTimeout = "90" [in Seconds][number] 
  
delayNotificationTimeout = "5" [in Seconds][number] 
  
waitChangeNotification = "0" [number] 
  
maxWaitChangeNotification = "0" [number] 
  
enableHeaderChecking = "true" [true|false] 
  
/>