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Upload and Download Files with SQL Server in ASP.NET

, 1 Jan 2012 CPOL 212.4K 18.1K 116
This article presents an example to upload and download files with SQL Server in ASP.NET.
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;

        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;

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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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