Response.BinaryWrite question

[spmm#]

Hi!

My ASP.NET page gets a pdf-file from a SQLServer database and writes it in a browserwindow, using Response.BinaryWrite. It basically looks like this:

public class WebForm1 : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e) { Byte myPdf = GetPdf; Response.Clear; Response.Buffer= true; Response.ContentType = "application/pdf"; Response.BinaryWrite(myPdf); Response.Flush; Response.End; }

private Byte GetPdf
{
//Code to get pdf from DB
}

//etc.
}

I noticed everytime I call the page, Page_Load is executed twice... Could someone explain this behaviour? How can I get rid of this?

Thanks!

 

[Hans Kesting]

Hi!

My ASP.NET page gets a pdf-file from a SQLServer database and writes it in a browserwindow, using Response.BinaryWrite. It basically looks like this:
[snip]

I noticed everytime I call the page, Page_Load is executed twice... Could someone explain this behaviour? How can I get rid of this?

Thanks!

AutoEventWireup set to true? Check the "Web Form Designer Generated code" region to see if Page_Load is attached twice to the Load event..

Hans Kesting

 

[spmm#]

AutoEventWireup set to true? Check the "Web Form Designer Generated code"

region to see if Page_Load is attached twice to the Load event..

Hans Kesting

Where do I set AutoEventWireup? I didn't attach Page_Load twice, so that can't be it. Below my full code... if I step through Page_Load, after Response.End it jumps back to byte myPdf = GetPdf; instead of showing the pdf in my browser window. Any other ideas?? Thanks.

using System;
using System.IO;

namespace WebForm1
{
/// <summary>
/// Summary description for WebForm1.
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e) { byte myPdf = GetPdf; Response.Clear; Response.Buffer= true; Response.ContentType = "application/pdf"; Response.BinaryWrite(myPdf); Response.Flush; Response.End; }

private byte GetPdf
{
//Code to get pdf from disk
FileStream MyFileStream;
long FileSize;
MyFileStream = new FileStream(@"C:\somefile.pdf", FileMode.Open); FileSize = MyFileStream.Length; byte Buffer = new byte[(int)FileSize]; MyFileStream.Read(Buffer, 0, (int)FileSize); MyFileStream.Close; return Buffer; }

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent; base.OnInit(e); }

/// <summary>
/// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent { this.Load += new System.EventHandler(this.Page_Load); } #endregion } }

 

[Guest]

Sounds like this might be your problem:

http://www.eggheadcafe.com/forums/forumsearchbranch.asp?THREADID=14821&INTID=5

I'm running into the same issue and haven't seen a lot on the web about this. I'm thinking about opening a problem report with MS if I don't get an answer soon.

Steve Fletcher

AutoEventWireup set to true? Check the "Web Form Designer Generated code" region to see if Page_Load is attached twice to the Load event..

Hans Kesting

Where do I set AutoEventWireup? I didn't attach Page_Load twice, so that can't be it. Below my full code... if I step through Page_Load, after Response.End it jumps back to byte myPdf = GetPdf; instead of showing the pdf in my browser window. Any other ideas?? Thanks.

using System;
using System.IO;

namespace WebForm1
{
/// <summary>
/// Summary description for WebForm1.
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e) { byte myPdf = GetPdf; Response.Clear; Response.Buffer= true; Response.ContentType = "application/pdf"; Response.BinaryWrite(myPdf); Response.Flush; Response.End; }

private byte GetPdf
{
//Code to get pdf from disk
FileStream MyFileStream;
long FileSize;
MyFileStream = new FileStream(@"C:\somefile.pdf", FileMode.Open); FileSize = MyFileStream.Length; byte Buffer = new byte[(int)FileSize]; MyFileStream.Read(Buffer, 0, (int)FileSize); MyFileStream.Close; return Buffer; }

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent; base.OnInit(e); }

/// <summary>
/// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent { this.Load += new System.EventHandler(this.Page_Load); } #endregion } }

 

[rdevalco]

in Page_Load
the asp.net page life cycle does that - it appears to call it 2x...

so add :
if (Page.IsPostback == false)
{
// what you have there now
}