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

Question

Mani Kandan · 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'); ); } }

Mani Kandan · 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.