上传文件 [英] Uploadfile

问题描述

hi ,,
我需要使用上传文件上传图片，我编写了类似FileUpload1.PostedFile.ContentType的代码=" image/.jpg
但它不起作用，如何编写代码请告诉我

在此先感谢

,
i need to upload image by using upload file,i wrote code like FileUpload1.PostedFile.ContentType == "image/.jpg
but its not working,how to write the code please tell me

Thanks In Advance

推荐答案

嗨 Ganesh，

请使用以下代码:

Hi Ganesh,

Please use the following code:

Dim strMessage As String = ""
Public Const FILE_TYPE_NOT_ALLOWED As String = "|.exe|.ini|
        Dim intFileSize As Decimal
        Dim extension As String
           If flu.HasFile Then
                extension = "|" & Path.GetExtension(flu.FileName) & "|"
                If FILE_TYPE_NOT_ALLOWED.Contains(extension) = True Then
                    strMessage = FILE_TYPE_NOT_ALLOWED_MESSAGE
                Else
                    intFileSize = flu.PostedFile.ContentLength / 1048576
                    If intFileSize > SessionInfo.MaxRequestLength / 1024 Then
                        strMessage = String.Format(MAX_FILE_SIZE_MESSAGE, SessionInfo.MaxRequestLength / 1024)
                    Else
                        Dim strFile As String = flu.FileName
                        Dim strFolder As String = Path.Combine(FolderPath, getFolderType(Folder))
                        Dim GM As New GeneralMethod()
                        MakeDirectory(strFolder)
                        If File.Exists(HttpContext.Current.Server.MapPath(Path.Combine(strFolder, strFile))) Then
                            strMessage = GM.GetMsgHash("FileExists")
                        Else
                            flu.PostedFile.SaveAs(HttpContext.Current.Server.MapPath(Path.Combine(strFolder, strFile)))
                            strMessage = GM.GetMsgHash("FileUploaded")
                        End If
                    End If
                End If
            End If

如有任何疑问，请让我知道.

如果对您有帮助，请提供投票.

谢谢，
Imdadhusen

Please do let me know, if you have any doubt.

Please provide Vote if this would be helpful to you.

Thanks,
Imdadhusen

Design:
<table>
<tr>
<td>
<asp:FileUpload ID="file1" runat="server" />
</table>
</tr>
</td>


Code:
//image Upload
                string FileName = null;
                HttpFileCollection uploadedFiles = Request.Files;
                HttpPostedFile userPostedFile;
                if (uploadedFiles.Count > 0)
                {
                    userPostedFile = uploadedFiles[0];
                    if (userPostedFile.ContentLength > 0)
                    {
                        if (file1.PostedFile.ContentLength >= 262144)
                        {
                            ShowAlert("The file size should be less than 256KB");
                        }
                        else
                        {
                            FileName = System.IO.Path.GetFileName(file1.PostedFile.FileName);
                            int ind = FileName.LastIndexOf(".");
                            string fileType = FileName.Substring(ind + 1).ToString();
                            if (!((fileType == "jpg") || (fileType == "gif") || (fileType == "") || (fileType == "jpeg") || (fileType == "png") || (fileType == "PNG") || (fileType == "JPG") || (fileType == "GIF") || (fileType == "JPEG")))
                            {
                                ShowAlert("Please Upload only JPG/GIF/PNG image formats");
                            }
                            else
                            {
                                FileName = strEmployeeId + "_" + FileName;
                                string filepath = Server.MapPath("EmpImages");
                                string FileFullName = filepath + "\\" + FileName;
                                file1.PostedFile.SaveAs(FileFullName);
                            }
                        }
                    }
                    else
                    {
                        FileName = "";
                    }
                }

{
                  userPostedFile = uploadedFiles[0];
                  if (userPostedFile.ContentLength > 0)
                  {
                      if (file1.PostedFile.ContentLength >= 262144)
                      {
                          ShowAlert("The file size should be less than 256KB");
                      }
                      else
                      {
                          FileName = System.IO.Path.GetFileName(file1.PostedFile.FileName);
                          int ind = FileName.LastIndexOf(".");
                          string fileType = FileName.Substring(ind + 1).ToString();
                          if (!((fileType == "jpg") || (fileType == "gif") || (fileType == "") || (fileType == "jpeg") || (fileType == "png") || (fileType == "PNG") || (fileType == "JPG") || (fileType == "GIF") || (fileType == "JPEG")))
                          {
                              ShowAlert("Please Upload only JPG/GIF/PNG image formats");
                          }
                          else
                          {
                              FileName = strEmployeeId + "_" + FileName;
                              string filepath = Server.MapPath("EmpImages");
                              string FileFullName = filepath + "\\" + FileName;
                              file1.PostedFile.SaveAs(FileFullName);
                          }
                      }
                  }
                  else
                  {
                      FileName = "";
                  }
              }

这篇关于上传文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！