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Upload and Download Files with SQL Server in ASP.NET

, 1 Jan 2012
This article presents an example to upload and download files with SQL Server in ASP.NET.
ASPNetFileUpDownLoad.zip
ASPNetFileUpDownLoad
ASPNetFileUpDownLoad
ASPNetFileUpDownLoad.csproj.user
bin
Global.asax
obj
Debug
Properties
Styles
Utilities
CreateDatabaseScript.zip
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using ASPNetFileUpDownLoad.Utilities;

namespace ASPNetFileUpDownLoad
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (! IsPostBack)
            {
                DataTable fileList = FileUtilities.GetFileList();
                gvFiles.DataSource = fileList;
                gvFiles.DataBind();
            }
        }

        protected void btnUpload_Click(object sender, EventArgs e)
        {
            // Although I put only one http file control on the aspx page,
            // the following code can handle multiple file controls in a single aspx page.
            HttpFileCollection files = Request.Files;
            foreach (string fileTagName in files)
            {
                HttpPostedFile file = Request.Files[fileTagName];
                if (file.ContentLength > 0)
                {
                    // Due to the limit of the max for a int type, the largest file can be
                    // uploaded is 2147483647, which is very large anyway.
                    int size = file.ContentLength;
                    string name = file.FileName;
                    int position = name.LastIndexOf("\\");
                    name = name.Substring(position + 1);
                    string contentType = file.ContentType;
                    byte[] fileData = new byte[size];
                    file.InputStream.Read(fileData, 0, size);

                    FileUtilities.SaveFile(name, contentType, size, fileData);
                }                
            }

            DataTable fileList = FileUtilities.GetFileList();
            gvFiles.DataSource = fileList;
            gvFiles.DataBind();
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Dr. Song Li

United States United States
I have been working in the IT industry for some time. It is still exciting and I am still learning. I am a happy and honest person, and I want to be your friend.

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Web02 | 2.8.140905.1 | Last Updated 1 Jan 2012
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