C#

• Use the Response.TransmitFile method[^];
• Use the Response.WriteFile method[^];
• Read the file one block at a time and write each block to the response before reading the next block;

string physicalPath = ListBox1.SelectedValue;
if (!string.IsNullOrWhiteSpace(physicalPath))
{
    FileInfo fileToSend = new FileInfo(fileToSend);
    if (fileToSend.Exists)
    {
        System.Web.HttpContext context = System.Web.HttpContext.Current;
        context.Response.Clear();
        context.Response.ClearHeaders();
        context.Response.ClearContent();
        context.Response.ContentType = "application/octet-stream";
        context.Response.AddHeader("content-length", fileToSend.Length.ToString());
        context.Response.AppendHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlPathEncode(fileToSend.Name));
        context.Response.TransmitFile(fileToSend.FullName);
        context.Response.Flush();
        context.ApplicationInstance.CompleteRequest();
    }
}

// (Same code as before, up to and including the "Content-Disposition" header)

int bytesRead;
byte[] buffer = new byte[10000];
using (Stream fileStream = fileToSend.OpenRead())
{
    while (context.Response.IsClientConnected && (bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
    {
        context.Response.OutputStream.Write(buffer, 0, bytesRead);
        context.Response.Flush();
    }
}

context.ApplicationInstance.CompleteRequest();

// static so that all instances of the Class/Form/whatever use the same counter
private static int ComboBoxCounter = 0;

private const string ComboBoxNameBase = "ComboBox";

// keep a List of references to new ComboBoxes created
public List<ComboBox> TheComboBoxes = new List<ComboBox>();

public ComboBox GetNewComboBox()
{
    ComboBox cmbx = new ComboBox {Name = string.Format("{0}{1}",ComboBoxNameBase, ComboBoxCounter++)};
    TheComboBoxes.Add(cmbx);
    return cmbx;
}

// sample usage
// panel1.Controls.Add(GetNewComboBox()); // ComboBox0 added to Panel
// panel1.Controls.Add(GetNewComboBox()); // ComboBox1 added to Panel

TextBox tbProd = (TextBox)pn.Controls.Find("txtProdName" + i, false).FirstOrDefault();

tbProd.Text = "Blah";

TextBox tbProd = (TextBox)pn.Controls.Find("txtProdName" + i, false).FirstOrDefault();

TextBox tbProd = ....

pn.Controls["txtProdName3"].Text = "hello";

public List<TextBox> ListOfTextBoxes = new List<TextBox>();

public void createTextBoxes(int howMany)
{
    TextBox txtProdName;
    TextBox txtProdDesc;

    for(int i = 0; i < howMany; i++)
    {
        txtProdName = new TextBox();
        txtProdDesc = new TextBox();

        ListOfTextBoxes.Add(txtProdName); // keep a reference !
        ListOfTextBoxes.Add(txtProdDesc);
        
        txtProdName.Name = "txtProdName " + i;
        pn.Controls.Add(txtProdName);

        txtProdDesc.Name = "txtProdDesc " + i;
        pn.Controls.Add(txtProdDesc);
    }
}

// sample uses in code:

ListOfTextBoxes[2].Text = "blah";

// or, take advantage of the string Key of a ControlCollection

pn.Controls["txtProdName3"].Text = "hello";

string tbContent1 = ListOfTextBoxes[0].Text;

public void DrawControl(Graphics g)
       {
           int X = 599;
           int Y = 10;
           int Width = 225;
           using (GraphicsPath path = GraphicsHelper.Create(X, Y, 224, 119, 5))
           {
               using (Pen frameWithBlackBgrd = new Pen(CWColors.FrameWithBlackBgrd))
               {
                   g.DrawPath(frameWithBlackBgrd, path);
               }
           }

           if (GuiResInfoMng.Instance.Lang != null && GuiResInfoMng.Instance.Param != null)
           {
               using (SolidBrush fixedTextWithBlackBgrd = new SolidBrush(CWColors.FixedTextWithBlackBgrd))
               {
                   g.DrawString(GuiResInfoMng.Instance.Lang.GetStr(LangId.IDS_COM_TOTALCNT),
                       FontFactory.Instance.GetFont(LangId.FNT_M2), fixedTextWithBlackBgrd, X, Y);
                   g.DrawString(GuiResInfoMng.Instance.Lang.GetStr(LangId.IDS_COM_PASS), FontFactory.Instance.GetFont(LangId.FNT_M2),
                       fixedTextWithBlackBgrd, X, Y + 23);
                   g.DrawString(GuiResInfoMng.Instance.Lang.GetStr(LangId.IDS_COM_NG), FontFactory.Instance.GetFont(LangId.FNT_M2),
                       fixedTextWithBlackBgrd, X - 1, Y + 46);
               }
           }

           using (SolidBrush variableText = new SolidBrush(CWColors.VariableText))
           {
               g.DrawString(ParamHelper.GetParamStr(ParamId.TOTALCOUNT).Trim(), FontFactory.Instance.GetFont(LangId.FNT_M2), variableText, X + Width - 60, Y);
               g.DrawString(ParamHelper.GetParamStr(ParamId.PASSCOUNT).Trim(), FontFactory.Instance.GetFont(LangId.FNT_M2), variableText, X + Width - 60, Y + 23);
               g.DrawString(ParamHelper.GetParamStr(ParamId.NGCOUNT).Trim(), FontFactory.Instance.GetFont(LangId.FNT_M2), variableText, X + Width - 60, Y + 46);
           }
       }

public void DrawGraph(Graphics g)
       {
           g.SmoothingMode = SmoothingMode.HighSpeed;
           //Draw background
           _frameXBar.DrawBackground(g, XbarPos);
           _frameNumber.DrawBackground(g, NumberPos);
           _frameRS.DrawBackground(g, RsPos);

           //Draw XBar
           DrawXBarBase(g);
           DrawXbarGraph(g);

           ////Draw RS
           DrawRSBase(g);
           DrawRSGraph(g);

           ////Draw Number
           DrawNumber(g);
       }

private void DrawRSGraph(Graphics g)
        {
            if (IsAllLine)
            {
                if (IsR)
                {
                    if (IsFullLine)
                    {
                        DrawPolyline(_dataAllLineRFullNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                    else
                    {
                        DrawPolyline(_dataAllLineRPassNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                }
                else
                {
                    if (IsFullLine)
                    {
                        DrawPolyline(_dataAllLineSFullNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                    else
                    {
                        DrawPolyline(_dataAllLineSPassNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                }
            }
            else
            {
                if (IsR)
                {
                    if (IsFullLine)
                    {
                        DrawPolyline(_dataForLineRFullNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                    else
                    {
                        DrawPolyline(_dataForLineRPassNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                }
                else
                {
                    if (IsFullLine)
                    {
                        DrawPolyline(_dataForLineSFullNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                    else
                    {
                        DrawPolyline(_dataForLineSPassNumber, g, _frameRS.Width, _frameRS.Height, CalculateHeightRS, RsPos);
                    }
                }
            }

        }