View PDF in ATLAS?

In my existing 1.1 app, I have a datagrid with a column that, when clicked, displays a pdf file. In trying to convert it to 2.0 with Atlas, the pdf will not display, no error, but no display either. The data for the pdf is stored in SQL as binary data. I have listed the code below. If anyone could shed some light onto the issue, I'd greatly appreciate it.

If dr.Read Then
Dim byData(dr.GetBytes(0, 0, Nothing, 0, Integer.MaxValue) - 1) As Byte
dr.GetBytes(0, 0, byData, 0, byData.Length)
Response.ClearContent()
Response.ClearHeaders()
Response.Buffer = True
Response.AddHeader("Content-Disposition", "inline;filename=" & strFileName)
Response.AddHeader("Accept-Header", byData.Length)
Response.ContentType = strContentType
Response.BinaryWrite(byData)
Response.Flush()
Response.Close()
End If

Again, any feedback would be appreciated.

Thanks.

I ended up diong the postback in a different page.

What you will need to do is have a link in your datagrid to another page (ie viewattachment.aspx?filename=filename) and then create a non ajax windows form page called viewattachment.aspx

In the viewattachment.aspx page_load method you can then place your response code as you mentioned above

I have written an example of thishere.
Clinton

VS 2005 IDE now unstable and crashing

I recently installed AJAX and the control toolkit, setup a sample website and it worked very slick. I have an existing app written in VB.net in VS 2005 that i am integrating the AJAX toolkit, specifically the dropdownshadow extender, scriptmanager and updatepanel, having copied the needed configuration into my web.config from the small app i wrote.

The problem is my environment is now extremenly unstable and crashes whenever i try to change a property of a control within the update panel or on any page containing an ajax control. Simply clicking on a textbox within the AJAX control will randomly cause an error screen i have never seen before saying Visual Studio has encountered an error and must restart.

Once the crash happens i cannot switch to design view as it says no AJAX tags are recognized, yet if i compile and run it works fine, not much help if i cannot design tho. I strip the tags out in code view and i am off again until the next crash.

After some crashes i try to drag an AJAX control onto a page and i get an 'Error: control could not be created' , control is not recognized. I have to reboot my system to get it to work.

I installed SP1 Beta and the problem still persists. This is very frustrating as the controls are working great other than when they crash my IDE. I will attach a screenshot if needed once i get in front of my dev station.

Hopefully someone has had this problem already.

Cheers!! And great work so far!!

I have never seen that, but can be a bug fixed in the new SP1 for VS2005http://alpascual.com/blog/al/archive/2006/12/15/Visual-Studio-2005-Service-Pack-1-has-been-released.aspx

See if installing it fixes your problems

This happens to me much more often as well after installing AJAX.

Sorry been away for a while, i installed SP1 but still unstable. I also constantly get

Error 182 Element 'ScriptManager' is not a known element. This can occur if there is a compilation error in the Web site.

It does not occur everytime but when it does i cannot change to design view. The site still runs fine but it is frustrating that i have to reboot or wait for the 'magic' in the air to sort the problem out. I have seen this in many forums but no one ever has an answer yet.

VS2005 often crashes when I try to shut it down with SP1 and SP1 for Vista. I get memory corrupt errors and it can't recognize the ASP.NET Ajax tags most of the time. I am running Vista x64 RC1 though so some problems could be related to that...

Web App Projects and ScriptManager/UpdatePanel

I am VERY new to this so please excuse me for this obvious question. I have started a basic web app project in VS2005. Just a button, label and textbox. Wors fine. If I drop a scriptmanager and update panel on the page and move the three controls to the update panel I get a scripting error that 'Sys' is not defined. The error is in the page source script shown below:

Sys.WebForms.PageRequestManager._initialize('ScriptManager1', document.getElementById('form1'));
Sys.WebForms.PageRequestManager.getInstance()._updateControls(['tUpdatePanel1'], [], [], 90);

Is there a way to prevent this or edit the script that the script manager produces so as to not throw the error?

Thanks

Hi ixis,

You will have to use the "ASP.NET-Enabled Web Site" template instead of the "Empty Web Site" when creating a new Ajax application so that http handlers and modules are registered in your web.config. Here's an example of an Ajax-Enabled Web Site's web.config:

<configuration> <configSections> <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false"/> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" /> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" /> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" /> </sectionGroup> </sectionGroup> </sectionGroup> </configSections> <system.web> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </controls> <tagMapping> <add tagType="System.Web.UI.WebControls.CompareValidator" mappedTagType="System.Web.UI.Compatibility.CompareValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add tagType="System.Web.UI.WebControls.CustomValidator" mappedTagType="System.Web.UI.Compatibility.CustomValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add tagType="System.Web.UI.WebControls.RangeValidator" mappedTagType="System.Web.UI.Compatibility.RangeValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add tagType="System.Web.UI.WebControls.RegularExpressionValidator" mappedTagType="System.Web.UI.Compatibility.RegularExpressionValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add tagType="System.Web.UI.WebControls.RequiredFieldValidator" mappedTagType="System.Web.UI.Compatibility.RequiredFieldValidator, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add tagType="System.Web.UI.WebControls.ValidationSummary" mappedTagType="System.Web.UI.Compatibility.ValidationSummary, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </tagMapping> </pages><!-- Set compilation debug="true" to insert debugging symbols into the compiled page. Because this affects performance, set this value to true only during development. --> <compilation debug="false"> <assemblies> <add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </assemblies> </compilation> <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </httpModules> </system.web> <system.web.extensions> <scripting> <webServices><!-- Uncomment this line to customize maxJsonLength and add a custom converter --> <!-- <jsonSerialization maxJsonLength="500"> <converters> <add name="ConvertMe" type="Acme.SubAcme.ConvertMeTypeConverter"/> </converters> </jsonSerialization> --> <!-- Uncomment this line to enable the authentication service. Include requireSSL="true" if appropriate. --> <!-- <authenticationService enabled="true" requireSSL = "true|false"/> --> <!-- Uncomment these lines to enable the profile service. To allow profile properties to be retrieved and modified in ASP.NET AJAX applications, you need to add each property name to the readAccessProperties and writeAccessProperties attributes. --> <!-- <profileService enabled="true" readAccessProperties="propertyname1,propertyname2" writeAccessProperties="propertyname1,propertyname2" /> --> </webServices><!-- <scriptResourceHandler enableCompression="true" enableCaching="true" /> --> </scripting> </system.web.extensions> <system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-ISAPI-2.0"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> <add name="ScriptResource" verb="GET" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </handlers> </system.webServer></configuration>

Thanks, I'll give that a try. Just to note because I wasn't very clear in my original post, if I create a normal ASP.NET Website project, the UpdatePanel works just fine. If I create a Web Application Project using the Visual Studio 2005 Web Application Project Model I have the problem. I'm not saying your solution isn't what I am looking for just clearing up the original question. I am certainly going to review my web.config as per your post.

web app with multiple web services

Hi all, I intend on having a web app which would have many .asmx files. Some would be atlas web services and some would be regular web services. I noticed that in the web.config it changes the httphandler for .asmx files. Will this affect all my .asmx files? Is there anyway to restrict this based on folder paths etc?
TIA!Yes, you can restrict handlers to specific files or directories.
Please note that even though the .asmx requests are now handled by adifferent handler, it should not break anything. All this handler doesis return a JavaScript proxy when someone requested the service withthe "/js" pathinfo, such as myservice.asmx/js. All other requestsshould just be forwarded to the original handler.

How do I restrict handlers for certain folders? Also, it appears that my <pages> element is causing problems for my webservice folder. Specifically the autoeventwireup property set to false fails to load the web service. But I need that set to false for my regular .aspx pages. I tried putting a new <pages> element under a location tag for that folder but no luck.
TIA!

I would suggest to collect all your ASP.NET AJAX Web services (and related pages) in one folder or subfolders of it.

In the top folder you create a Web.config file where you put the applicable configuration items that apply (move them from the application Web.vonfig).

Doing this he behavior of the runtime is the old one for all application folders but the one described above.

Let me know if it works for you.

Web Chatroom

I'm just curious as to how to at least develop this in ASP.NET. I know how to do it in a Winforms app but in ASP.NET, how is it possible to create a chatroom style application? How does it work? How can several users connect to 1 "console" and see each other sending messages onto the main screen?

Anyone have any ideas/hints/tips on how to achieve this? I thought this would be a nice side project of mine to work on and would love to get started. Maybe if I can, put some AJAX into it (even though ive never used AJAX!)

I made a Chat with Ajax but it does not work that effecient for the end users who is having slow internet connections.

On the other hand Windows communication Foundation is a better solution which i know off. You will need to create Service , Proxy and the End Point.

To keep the service run you will need a Dedicated Server (or at least so some one who keeps it up for u).

thats all very well however not quite what the question was :-)

Question was - how would you go about developing this in ASP.NET? (forget about resources/ajax)

Check the following links.

http://www.dynamicajax.com/fr/AJAX_Web_Chat_ASP_NET-271_290_328.html

http://blogs.msdn.com/coding4fun/archive/2007/03/01/1785048.aspx

http://steveorr.net/articles/WebChat.aspx

http://www.codeproject.com/Ajax/UChat.asp

http://www.codeproject.com/aspnet/ASPNetChat.asp

I hope these help.