C#

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="wm5ftdl.aspx.cs" Inherits="wm5ftdl" %>

<%
    // Send a download file to the client given the filename.
    string guid = Request.QueryString["file"];
    string fileName = "ERROR";
    byte[] data = new byte[] { 0, 0, 0, 0 };
    string strCon = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["DownloadDatabase"].ConnectionString;
    using (System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection(strCon))
        {
        con.Open();
        string strcmd = "SELECT [iD] ,cn.[fileName],[description] ,[dataContent] ,[version] " +
                        "FROM dlContent cn " +
                        "WHERE cn.iD=@ID";
        using (System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand(strcmd, con))
            {
            cmd.Parameters.AddWithValue("@ID", guid);
            using (System.Data.SqlClient.SqlDataReader r = cmd.ExecuteReader())
                {
                if (r.Read())
                    {
                    fileName = (string) r["filename"];
                    data = (byte[]) r["dataContent"];
                    }
                }
            }
        }
    Response.Clear();
    Response.AddHeader("Cache-Control", "no-cache, must-revalidate, post-check=0, pre-check=0");
    Response.AddHeader("Pragma", "no-cache");
    Response.AddHeader("Content-Description", "File Download");
    Response.AddHeader("Content-Type", "application/force-download");
    Response.AddHeader("Content-Transfer-Encoding", "binary\n");
    Response.AddHeader("content-disposition", "attachment;filename=" + fileName);
    Response.BinaryWrite(data);
    Response.End();
%>

/// <summary>
/// On page load, fill out the Download table
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Page_Load(object sender, EventArgs e)
    {
    try
        {
        List<Downloadable> downloads = GetDownloadList();
        foreach (Downloadable dl in downloads)
            {
            HtmlTableRow row = new HtmlTableRow();
            HtmlTableCell cell = new HtmlTableCell();
            cell.InnerHtml = "<a href=\"wm5ftdl.aspx?file=" + dl.Id + "\" target=\"_blank\">" + dl.FileName + "</a>";
            row.Cells.Add(cell);
            tbDownloads.Rows.Add(row);
            }
        }
    catch (Exception ex)
        {
            HtmlTableRow row = new HtmlTableRow();
            HtmlTableCell cell = new HtmlTableCell();
            cell.InnerHtml = ex.ToString();
            row.Cells.Add(cell);
            tbDownloads.Rows.Add(row);

        }
    }
/// <summary>
/// Returns the list of available files, and their indexes.
/// Note that this only lists the Latest version: not all files and versions.
/// </summary>
/// <returns></returns>
private List<Downloadable> GetDownloadList()
    {
    List<Downloadable> list = new List<Downloadable>();
    string strCon = ConnectionStrings.Download;
    using (SqlConnection con = new SqlConnection(strCon))
        {
        con.Open();
        // Get only the file Ids with the highest version number.
        string strcmd = "SELECT [iD] ,cn.[fileName],[description] ,[version], [uploadedOn], [uploadedBy], [downloadUserOnly] " +
                        "FROM dlContent cn " +
                        "INNER JOIN " +
                        "( SELECT filename, MAX(Version) AS maxver " +
                        "  FROM dlContent " +
                        "  GROUP BY filename" +
                        ") gcn ON cn.filename = gcn.filename " +
                        "         AND cn.version = gcn.maxver";
        using (SqlDataAdapter da = new SqlDataAdapter(strcmd, con))
            {
            DataTable dt = new DataTable();
            da.Fill(dt);
            foreach (DataRow dr in dt.Rows)
                {
                list.Add(new Downloadable(dr));
                }
            }
        }
    return list;
    }

ASPnoob wrote:

Then I want to replace the name Test.doc with a GUID before uploading it to the folder on the server to avoid duplication.

Bastard Programmer from Hell
if you can't read my code, try converting it here[^]

ripples wrote:

I am stuck

public class EmployeeData
{
    private string name;
    private string department;

    public EmployeeData(string name, string department)
    {
        // Validation goes here
        this.name = name;
        this.department = department;
    }

    public string Name
    {
        get { return name; }
    }
    public string Department
    {
        get { return department; }
    }

    public override string ToString()
    {
        return string.Format("{0}, {1}", name, department);
    }
}
public class Employee : List<EmployeeData>
{
    public Employee(EmployeeData data)
        : base(new EmployeeData[] { data })
    { }
}

Employee employee = new Employee(new EmployeeData("Fred", "Reception"));
employee.Add(new EmployeeData("George", "IT"));
List<Employee> employees = new List<Employee>();
employees.Add(employee);
foreach (Employee employeeItem in employees)
{
    foreach (EmployeeData employeeData in employeeItem)
    {
        Console.WriteLine(employeeData);
    }
}

public class Employee : IEnumerable<EmployeeData>
{
    private List<EmployeeData> list;

    public Employee(EmployeeData data)
    {
        list = new List<EmployeeData>();
        list.Add(data);
    }

    public EmployeeData this[int index]
    {
        get { return list[index]; }
        set { list[index] = value; }
    }
    public int Count
    {
        get { return list.Count; }
    }

    public void Add(EmployeeData data)
    {
        list.Add(data);
    }
    public IEnumerator<EmployeeData> GetEnumerator()
    {
        return list.GetEnumerator();
    }
    IEnumerator IEnumerable.GetEnumerator()
    {
        return list.GetEnumerator();
    }
}

ripples wrote:

I am new to C# so pardon my mistakes.

object o = 1;
Console.WriteLine(o.GetType()); // System.Int32

List<KeyValuePair<Type, object>>

dynamic something = new TextBox();
something.Text = "Hello dynamic world!"; //OK

dynamic something = "Change the value to a string";
something.Text = "Hello dynamic world!"; //throws RuntimeBindingException

public void DoSomething(string someValue) { Console.WriteLine("The value is a string: {0}", someValue); }
public void DoSomething(double someValue) {
Console.WriteLine("The value is a double: {0}", somevalue); }

public void CallTheRightDoSomething()
{
  dynamic value = 0.5;
  DoSomething(value); // The value is a double: 0.5

  value = "Now use it as a string";
  DoSomehting(value); // The value is a string: Now use it as a string
}