icon of uploaded file in gridview when file has been saved in database RSS

• • Reply
  

  masoud-s

  Member

  81 Points

  196 Posts

  icon of uploaded file in gridview when file has been saved in database

  Nov 17, 2012 02:56 PM|LINK

  before i have a question about (icon of uploaded file in gridview) and recieved below code.

  this code seems that is for when we save files in the server. now if we save files in database how i have to change the code.

  using System.Drawing;
  using System.IO;
  
  public string GetIconFromFile()
  {
  Icon ic = Icon.ExtractAssociatedIcon(Server.MapPath (".")+"/Files/Test.txt");
  string imagePath=Server.MapPath(".") + "/Images/Test.ico";
  if (ic != null)
  {
     using (FileStream stream = new FileStream(imagePath, FileMode.OpenOrCreate))
     {
         ic.Save(stream);
      }
  }
      return imagePath ;
  
  }
  
  protected void GridViewEfile_RowDataBound(object sender, GridViewRowEventArgs e)
  {
  if (e.Row.RowType == DataControlRowType.DataRow)
  {
      System.Web.UI.WebControls.Image img = new System.Web.UI.WebControls.Image();
      img = (System.Web.UI.WebControls.Image)e.Row.FindControl("Image1");
      img.ImageUrl = GetIconFromFile();
  }
  }

  aspx

  <Columns>
   <asp:TemplateField>
   <ItemTemplate>
      <asp:Image ID="Image1" runat="server" />
        <asp:LinkButton ID="LinkButton1" runat="server" OnCommand="LinkButton1_Command" CommandName="Download" CommandArgument='<%#Eval("FileID")%>'><%#Eval("FileName")%></asp:LinkButton>
    </ItemTemplate>
  </asp:TemplateField>

  the code for uploading file is like below:

  protected void btnUpload_Click(object sender, EventArgs e)
      {
          
          // Read the file and convert it to Byte Array
  
          string filePath = FileUpload1.PostedFile.FileName;
  
          string filename = Path.GetFileName(filePath);
  
          string ext = Path.GetExtension(filename);
  
          string contenttype = String.Empty;
  
  
  
          //Set the contenttype based on File Extension
  
          switch (ext)
          {
  
              case ".doc":
  
                  contenttype = "application/vnd.ms-word";
  
                  break;
  
              case ".docx":
  
                  contenttype = "application/vnd.ms-word";
  
                  break;
  
              case ".xls":
  
                  contenttype = "application/vnd.ms-excel";
  
                  break;
  
              case ".xlsx":
  
                  contenttype = "application/vnd.ms-excel";
  
                  break;
  
              case ".jpg":
  
                  contenttype = "image/jpg";
  
                  break;
  
              case ".png":
  
                  contenttype = "image/png";
  
                  break;
  
              case ".gif":
  
                  contenttype = "image/gif";
  
                  break;
  
              case ".pdf":
  
                  contenttype = "application/pdf";
  
                  break;
  
          }
  
          if (contenttype != String.Empty)
          {
  
  
  
              Stream fs = FileUpload1.PostedFile.InputStream;
  
              BinaryReader br = new BinaryReader(fs);
  
              Byte[] bytes = br.ReadBytes((Int32)fs.Length);
  ....