c# - System.IO.Path.GetExtension returns null in ASP.NET

Question

Abhilash J A · Answer

Please post your code here.

Gaurav Raj · Answer

i post my code can somebody reply me

Gaurav Raj · Answer

protected void Post_Click(object sender, EventArgs e) { string fileExt = System.IO.Path.GetExtension(FileUpload1.FileName); //string ext = System.IO.Path.GetExtension(this.File1.PostedFile.FileName); if (fileExt == ".jpg" || fileExt == ".jpeg"||fileExt=="") { if (FileUpload1.HasFile && TextBoxPost.Text != "") { FileUpload1.SaveAs(Server.MapPath("~/BlogPic/" + FileUpload1.FileName)); b.Blog_Pic = "~/BlogPic/" + FileUpload1.FileName; b.Blog = TextBoxPost.Text; b.User_Id = Convert.ToInt32(Session["Id"]); b.Date1 = DateTime.Now.Date; b.Time1 = DateTime.Now.ToString("h:mm:ss"); cs.da.BlogTables.InsertOnSubmit(b); cs.da.SubmitChanges(); TextBoxPost.Text = ""; Response.Redirect(Request.Url.AbsoluteUri); //prevent to reinsert data after refresh data } else if (FileUpload1.HasFile && TextBoxPost.Text == "") { FileUpload1.SaveAs(Server.MapPath("~/BlogPic/" + FileUpload1.FileName)); b.Blog_Pic = "~/BlogPic/" + FileUpload1.FileName; b.Blog = TextBoxPost.Text; b.User_Id = Convert.ToInt32(Session["Id"]); b.Date1 = DateTime.Now.Date; b.Time1 = DateTime.Now.ToString("h:mm:ss"); cs.da.BlogTables.InsertOnSubmit(b); cs.da.SubmitChanges(); TextBoxPost.Text = ""; Response.Redirect(Request.Url.AbsoluteUri); //prevent to reinsert data after refresh data } else if (TextBoxPost.Text != "" && FileUpload1.HasFile == false) { b.Blog_Pic = "NoPic" + FileUpload1.FileName; b.Blog = TextBoxPost.Text; b.User_Id = Convert.ToInt32(Session["Id"]); b.Date1 = DateTime.Now.Date; b.Time1 = DateTime.Now.ToString("h:mm:ss"); cs.da.BlogTables.InsertOnSubmit(b); cs.da.SubmitChanges(); Response.Write(" alert('EAgain') "); TextBoxPost.Text = ""; Response.Redirect(Request.Url.AbsoluteUri);//prevent to reinsert data after refresh data } else if (TextBoxPost.Text == "" && FileUpload1.HasFile == false) { Response.Write(" alert('Please Added A photo or write Post Something'); "); } } else { Response.Write(" alert('Only File support Format jpeg and jpg'); "); } }

Abhilash J A · Answer

I think, Get extension method returns a extension of file. check following code sample string s = System.IO.Path.GetExtension( "file1.aspx" ); Or So check if (file != null && file.FileName != null) first before proceeding furthure.