你能给我一些使用文件上传来上传pdf文件的代码吗？ [英] can u give me the code to upload a pdf file using file upload

问题描述

你可以给我一个上传pdf文件的代码，使用文件上传

解决方案

你的问题不完整或信息较少。它控制你使用。 />
i想给你不同的方式： -

1]使用文件上传器控制器和常规的表现： -

 < span class =code-keyword><   asp：FileUpload     ID   =  flUpld    runat   =  server     /  >  
 <   asp：RegularExpressionValidator   
   
            < span class =code-attribute>                               id   =  RegularExpressionValidator1    runat   =  server  
   
                                           ErrorMessage   = 只允许使用PDF文件！  
   
                                           ValidationExpression   =  ^（（[A-ZA-Z] :) |？（\\ {2} \w +）\ 

）（\\（\\ \\ w [\ w]。*））（。pdf | .PDF）

ControlToValidate = flUpld CssClass = text-red > < / asp： RegularExpressionValidator >

2]使用ajax文件上传器控制器： -

 <   ajaxtoolkit：ajaxfileupload     id   =   AjaxFileUpload1    xmlns：ajaxtoolkit   = ＃unknown >  
 ThrobberID =myThrobber
 ContextKeys =fred
 AllowedFileTypes =jpg，pdf
 MaximumNumberOfFiles = 10 
 runat =server/> <   / ajaxtoolkit：ajaxfileupload  >  

3]或使用javascript脚本验证文件是。 pdf

 <   script     type     =  text / javascript >  
 var validFilesTypes = [ PDF， PDF]; 
函数ValidateFile（）
 {
 var file = document.getElementById（<％ = FileUpload1.ClientID ％> ）; 
 var label = document.getElementById（<％ = Label1.ClientID ％>  ）; 
 var path = file.value; 
 var ext = path.substring（path.lastIndexOf（。）+ 1，path.length）.toLowerCase（）; 
 var isValidFile = false; 
 for（var i = 0; i <   validFilesTypes.length;     i ++）  
   
               {  
   
                  如果   （ext   =   = validFilesTypes [i]）
   
                   {  
   
                           isValidFile   =  真; 
   
                           break;   
   
                  }   
  < span class =code-attribute> 
              }   
   
               if    （！isValidFile）  
   
               {  
   
              < span class =code-attribute>     label.style.color   =  red ;   
   
            < span class =code-attribute>       label.innerHTML   = 无效文件。请上传一个文件，其中包含    +   
   
                        extension：\ n \ n+ validFilesTypes.join（，   ）;   
   
              }   
   
               return     isValidFile;   
   
            }   
   
  < / script  & gt;  

这是简单的文件上传代码，您必须根据您的要求修改此代码

 受保护  void  UploadButton_Click（对象发​​件人，EventArgs e）
 {
  if （FileUploadControl.HasFile）
 {
  try  
 {
  string  filename = Path.GetFileName（FileUploadControl.FileName） ; 
 FileUploadControl.SaveAs（Server.MapPath（ 〜/）+ filename）; 
 StatusLabel.Text =  上传状态：文件已上传！; 
} 
  catch （例外情况）
 {
 StatusLabel.Text =  上传状态：无法上传文件。出现以下错误： + ex.Message; 
} 
} 
} 

或者你可以使用服务器端验证和代码在这里。但我建议使用客户端验证和简单的上传代码 -

根据您的要求在下面的代码中进行更改： -

  protected   void  btnUpload_Click（ object  sender，EventArgs e） 
 {
  //  从web.config文件获取上传路径 
  string  FilePath = ConfigurationManager.AppSettings [  FilePath ]的ToString（）; 
  bool  blSucces =  false ; 
  string  filename =  string  .Empty; 
  //  检查是否选择了文件上传 
  if （FileUploadToServer.HasFile）
 {
  try  
 {
  string  [] allowdFile = { 。pdf}; 
  //  这里我们只允许pdf文件，因此验证所选文件是否为 
  string  FileExt = System.IO.Path.GetExtension（FileUploadToServer.PostedFile.FileName）; 
  bool  isValidFile = allowdFile.Contains（FileExt）; 
  if （！isValidFile）
 {
 lblMsg.ForeColor = System.Drawing.Color.Red; 
 lblMsg.Text =  请仅上传pdf; 
} 
 其他 
 {
  //  < span class =code-comment>获取上传文件的大小，此处限制文件大小 
  int  FileSize = FileUploadToServer.PostedFile.ContentLength ; 
  if （FileSize <  =  1048576 ） //   1048576 byte = 1MB  
 {
  //  获取所选文件的文件名 
 filename = Path.GetFileName（FileUploadToServer.FileName）; 
  //  将所选文件保存到指定位置 
 FileUploadToServer.SaveAs（Server。 MapPath（FilePath）+ filename）; 
 lblMsg.Text =  文件上传成功！; 
 blSucces =  true ; 
} 
  else  
 {
 lblMsg.Text =  附件文件大小不应大于1 MB！; 
} 
} 
} 
  catch （例外情况）
 {
 lblMsg.Text =  上传文件时出错： + ex.Message; 
} 
} 
  else  
 {
 lblMsg.Text =  请选择要上传的文件。; 
} 
  //  将文件详细信息存储到数据库中 
  if （blSucces）
 {
 Updatefileinfo（filename，FilePath + filename）; 
} 
} 

can u give me the code to upload a pdf file using file upload

解决方案

your question is incomplete or having less information.which control you used.
i want to give you different ways:-
1]use file uploader controller with regular epression:-

<asp:FileUpload ID="flUpld" runat="server" />
                <asp:RegularExpressionValidator

                    id="RegularExpressionValidator1" runat="server"

                    ErrorMessage="Only PDF files are allowed!"

                    ValidationExpression="^(([a-zA-Z]:)|(\\{2}\w+)\

?)(\\(\w[\w].*))(.pdf|.PDF)

" ControlToValidate="flUpld" CssClass="text-red"></asp:RegularExpressionValidator>

2] Use ajax file uploader controller:-

<ajaxtoolkit:ajaxfileupload id="AjaxFileUpload1" xmlns:ajaxtoolkit="#unknown">
    ThrobberID="myThrobber"
    ContextKeys="fred"
    AllowedFileTypes="jpg,pdf"
    MaximumNumberOfFiles=10
    runat="server"/></ajaxtoolkit:ajaxfileupload>

3] or use javascript script to validate file is .pdf

<script type ="text/javascript">
    var validFilesTypes=["PDF","pdf"];
    function ValidateFile()
    {
      var file = document.getElementById("<%=FileUpload1.ClientID%>");
      var label = document.getElementById("<%=Label1.ClientID%>");
      var path = file.value;
      var ext=path.substring(path.lastIndexOf(".")+1,path.length).toLowerCase();
      var isValidFile = false;
      for (var i=0; i<validFilesTypes.length; i++)

      {

        if (ext==validFilesTypes[i])

        {

            isValidFile=true;

            break;

        }

      }

      if (!isValidFile)

      {

        label.style.color="red";

        label.innerHTML="Invalid File. Please upload a File with" +

         " extension:\n\n"+validFilesTypes.join(", ");

      }

      return isValidFile;

     }

</script>

this is simple file upload code you have to modify this code as per your requirement

protected void UploadButton_Click(object sender, EventArgs e)
{
    if(FileUploadControl.HasFile)
    {
        try
        {
            string filename = Path.GetFileName(FileUploadControl.FileName);
            FileUploadControl.SaveAs(Server.MapPath("~/") + filename);
            StatusLabel.Text = "Upload status: File uploaded!";
        }
        catch(Exception ex)
        {
            StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
        }
    }
}

or you can use server side validation and code is here. but i recommend to use client side validation and simple uploading code-
make change in below code as per your requirement:-

protected void btnUpload_Click(object sender, EventArgs e)
       {
           //Get path from web.config file to upload
           string FilePath = ConfigurationManager.AppSettings["FilePath"].ToString();
           bool blSucces = false;
           string filename = string.Empty;
           //To check whether file is selected or not to uplaod
           if (FileUploadToServer.HasFile)
           {
               try
               {
                   string[] allowdFile = { ".pdf" };
                   //Here we are allowing only pdf file so verifying selected file pdf or not
                   string FileExt = System.IO.Path.GetExtension(FileUploadToServer.PostedFile.FileName);
                   bool isValidFile = allowdFile.Contains(FileExt);
                   if (!isValidFile)
                   {
                       lblMsg.ForeColor = System.Drawing.Color.Red;
                       lblMsg.Text = "Please upload only pdf ";
                   }
                   else
                   {
                       // Get size of uploaded file, here restricting size of file
                       int FileSize = FileUploadToServer.PostedFile.ContentLength;
                       if (FileSize <= 1048576)//1048576 byte = 1MB
                       {
                           //Get file name of selected file
                           filename = Path.GetFileName(FileUploadToServer.FileName);
                           //Save selected file into specified location
                           FileUploadToServer.SaveAs(Server.MapPath(FilePath) + filename);
                           lblMsg.Text = "File upload successfully!";
                           blSucces = true;
                       }
                       else
                       {
                           lblMsg.Text = "Attachment file size should not be greater then 1 MB!";
                       }
                   }
               }
               catch (Exception ex)
               {
                   lblMsg.Text = "Error occurred while uploading a file: " + ex.Message;
               }
           }
           else
           {
               lblMsg.Text ="Please select a file to upload.";
           }
           //Store file details into database
           if (blSucces)
           {
               Updatefileinfo(filename, FilePath + filename);
           }
       }

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