Errors while uploading File to database

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2 posts, 0 answers
  1. scrut
    scrut avatar
    28 posts
    Member since:
    Jul 2007

    Posted 20 May 2008 Link to this post

    I am trying to upload files to a database and then let the user download them again.

    But when I upload a small file, it seems like only few kB actually make it into the database. The progress bar shows up for a split second only and then disappears. The entry is written is to the database but the binary content is too small.

    When I upload a large file (e.g. 10 MB), I get a "page cannot be displayed" error.

    Any idea? Thanks so much! s.

    Here's some code:



    telerik:RadUpload ID="RadUpload" runat="server" Skin="Telerik" InitialFileInputsCount="1" Width="620px" ControlObjectsVisibility="None" InputSize="100" OverwriteExistingFiles="True" />


    protected void SaveButton_Click(object sender, EventArgs e)  
            if (RadUpload.UploadedFiles.Count > 0)  
                // Obtain the USER ID from the Session  
                this.userid = HttpContext.Current.Session["USERID"].ToString();  
                if (String.IsNullOrEmpty(this.userid))  
                    this.userid = SATConfiguration.LocalUser;  
                // Obtain the description and clear it of "junk"  
                this.description = Regex.Replace(this.DescriptionTextBox.Text, "[\t\r\n\v\a\b\f\0\\\'\"]", String.Empty, RegexOptions.Compiled);  
                // Get the file and its name  
                file = RadUpload.UploadedFiles[0];  
                filefilename = file.GetName();  
                //Read the file  
                bytes = new byte[file.InputStream.Length];  
                file.InputStream.Read(bytes, 0, (int)file.InputStream.Length);  
                // Call the stored procedure AddAttachment with its parameters  
                using (SqlConnection conn = new SqlConnection(SATConfiguration.SatConnectionString))  
                        // Open a new connection  
                        // Create a command object identifying the stored procedure  
                        SqlCommand cmd = new SqlCommand("AddAttachment", conn);  
                        // Set the command object so it knows to execute a stored procedure  
                        cmd.CommandType = CommandType.StoredProcedure;  
                        // Add parameters to command, which will be passed to the stored procedure  
                        cmd.Parameters.AddWithValue("@userid", this.userid);  
                        cmd.Parameters.AddWithValue("@caseid", this.caseid);  
                        cmd.Parameters.AddWithValue("@filename", this.filename);  
                        cmd.Parameters.AddWithValue("@description", this.description);  
                        cmd.Parameters.AddWithValue("@attachment", this.bytes);  
                    catch (Exception ex)  
                        log.Error("Exception while writing attachment to database", ex);  
                        // close the connection  


  2. Erjan Gavalji
    Erjan Gavalji avatar
    1455 posts

    Posted 22 May 2008 Link to this post

    Hi scrut,

    You might be experiencing a combination of two issues. Can you check if you've allowed large file uploads through the <httpRuntime> section in your application's web.config file? As per the "only few kB actually make it into the database" - could it be caused by the field type in the database? Is the type of the field set to image?

    Erjan Gavalji
    the Telerik team

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