Most of the time you bind a datagrid when it's not a PostBack. The DataGrid then uses ViewState to remember all the data to rebuild it on subsequent postbacks. Thats great when it is expensive to grab the data, like running a sql query might be If you've ever done a View Source on a page with a bi...more >>

When is it better to store a small amount of data (say a very small DataSet or a couple of short string variables) in the Session vs in the Cache object. I've had it recommended to store such things in the Cache and to simply stay away from the Session as a general rule. But as far as I know, st...more >>

Simple question -- I have an ASPX page that accepts the ID of a document in the query string to be downloaded; however, the file is not in the web application and has to be read from another directory. Furthermore, I need to be able to check some session variables to make sure the user has ...more >>

Hi. I'm trying to add an event to a DropDownList from my code, but so far I haven't been able to do it right. The DropDownList is inside a DataGrid. The reason why I'm not adding an onSelectedIndexChanged attribute in the html code is because not all of the DropDownLists in the DataGrid is to ha...more >>

http://support.microsoft.com/?scid=3Dkb;en-us;315158 or not? Thanks. --=20 George Hester __________________________________...more >>

I would like to use WebForm(aspx) to Call WinForm (test.EXE) in the same computer. The test.exe will create a new Excel File immediately. This is my code: Process.Start("c:\test.exe", "") When I run the code,The Task Manager Add a new process named "test",but not thing happens.It do not a...more >>

Hi I use the same code to store jpg/gif and pdf into SQL database. The code below should display them, it works with jpg/gif but not pdf, I get "invalid parameter used" error. Any Idea ? Hung Tran ---------------------------------- System.IO.MemoryStream MyStream; MyStream = ne...more >>

Hi all, If I know that the size of the browser window is going to be fixed, can I use gridlayout? Thanks... -Nikhil ...more >>

Hi, I have a web form displaying 5 web usercontrols. Each usercontrol contains a 'Save' linkButton. Each usercontrol has a = panel as container. One panel is visible at a time. From my form, I'd like to ba able to execute the Save button's code by = using CallByName.e. Is it possible? H...more >>

I just tried to use a session variable in a module and it doesn't recognize Session. We can't use session variables in modules? Thanks, G ...more >>

Hello, I know I can debug ASP pages with visual studio.net, there is an option for that under project properties/configuration properties/debugging of an "asp.net" project. That's where my question comes in, the only way I've figure out how to debug asp pages, is to have an asp.net project ...more >>

I now this is not strictly a asp.net question but how do you refresh the parent window of a child browser window? The child window was displayed using javascript 'window.open' etc.... I have tried the following in the child window when a specific action happens but the parent window does not...more >>

I'm implementing a DataList that includes textboxes and check boxes in a table in the ItemTemplate. The following line in the HTML results in the error [System.InvalidCastException: Specified cast is not valid] when I go to run the project. <td><asp:CheckBox id="chkIncluded" runat="server" Ch...more >>

I need a regular expression + jscript guru. The validation expression below is for a RegularExpressionValidatior on a password input. It works perfectly on server side validation and in a utility I have to test Perl compatible expressions (Regex Coach). However it fails on the client side......more >>

I have a PC application (OS is Win XP Pro) that controls complex hardware via the PCI bus. We've written the app using VB.Net; but, recently the client has asked for remote access to data and remote control of the hardware config. parameters via web pages. This will include bi-directional tra...more >>

Firstly I am not using codebehind. All code is in the aspx and ascx. I have a main.aspx page with the following web control; <asp:placeholder ID="DynamicUserControl" runat="server" /> In the page_load of the main.aspx I dynamically load the usercontrol; DynamicUserControl.Controls.Add(L...more >>

I'm using this to get what browser with which the user is browsing. System.Web.HttpContext.Current.Request.ServerVariables["HTTP_USER_AGENT"] How come when I browse with Netscape 4.7, I get this: Mozilla/4.72 [en] (Windows NT 5.0; U) It doesn't tell me that it's netscape, only the version ...more >>

I'm using ASP.net. I have a piece of code that does a Response.Redirect("website.aspx") I want to be able to do the Redirect after 5 seconds of hitting that piece of code. I don't want to use MetaTags or JavaScript. Does the Reponse.Redirect have any delay properties. Thank you ...more >>

Hello everyone With VB, on an aspx page, I need to access some webservices APIs. I found some example in VB6 using MS XML library components : Dim HttpReq As New MSXML2.XMLHTTP40 dim strRequestXML as string strRequestXML= fill out the request xml document here HttpReq.open("POST", "http:...more >>

Any guidance available for this. I know it will be easier in Whidbey but for now we'll have a single site made up of distinct modules. What are the options ? : - single DLLs (not that conveniant when mutiple modules are under revision) - mutliple DLLs AFAIK not supported by VS.NET but likely p...more >>

Yesterday this worked. Today, on my web forms when they are posted I am getting errors with the SelectedItem properties on droplists. Specifically, the following: Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the...more >>

I've created a datagrid programatically, and added it a placeholder control. The datagrid contains an edit button for each record. I need to capture this event some how. However, seeing as the placeholder control appears to nuke its contents (the DataGrid) on postback, I can't seem to capture ...more >>

1. Can the columns of the grid be accessed by the name of the data column they represent (e.g.Columns("StudentId")) 2. Can automatically added columns be accessed programmatically at all 3. My grid is populated by a dataset returned by a web service so data source and data member are set at r...more >>

Hi All I need to store some xml during a users session. I need to perform modifications to the xml throughout a user's session. Instead of storing in as a string and loading up an XmlDocument every time I need to make modi, I thought I would rather store the XmlDocument itself. Are there an...more >>

When a web application is first started and it uses a Module block, are global variables unique to the Request thread? What about a class module that declares shared variables. I created a test application and it appears to be unique to each Request. If this is a true statement is there a disadva...more >>

I have an error procedure that handles all errors produced by my application. This procedure is responsible for logging the error information in my SQL database. I have modifed the DefaultRedirect in the web.config to display a custom error page to my users. Once the error information has bee...more >>

I'm having trouble with a custom webcontrol I've written. It successfully persists information about a control property to some inner property tags, but when the aspx file is parsed to create the control, an exception is thrown from deep in the bowels of the Framework. The exception states tha...more >>

Hi all, Is there the best way to store lots of constant values(like error messages) in asp.net application -- i mean soemwhere that other persons(who is not a programmer or developer) can change those values and still can run the application without recompile? Please don't tell me web.config ...more >>

Hello, My problem is that I want to show data in datagrid from two table.I have two table tb_Eqp_Main and tb_Equipment they have a relationship with EqpNo... I use da.Fill(dataset,Table name) but I dont know What must I write to TableName...My code : strConn="server=(local)\\sql2000;database=...more >>

I think that with .NET FrameWork we no longer need to register our external components with "regsrv32.exe ...". For what I know the information of ASP.NET components aren't keeped in Registry. In this way, I can copy components from one server to another without register and they will be able to...more >>

My web app works locally, but after copying the project over to our intranet server, I get the following error when my SQLConnection tried to connect to the SQL server... Login failed for user 'DEVELOP\IUSR_DEVELOP' I have set the above user up, on the SQL database, and checked the permission...more >>

I'm sorry if this is the wrong place to post this question. I also posted in SQL Server area... but since it involved ASP.NET on a host site and SQL Server, thought appropriate to ask both groups for a good solution... ideas... I have written a SQL DB, and ASP.NET website for a client. The c...more >>

I need to open a login window. So I designed another .aspx window and am trying to get it to come up but I don't know the command(s) todo so. Thanks in advance ...more >>

I'm using the UploadValues method of the WebClient to post values to one of my .aspx pages. My expectation is that the page will recognize the posted values and populate my page controls, but it doesn't. For example, I have a textbox server control whose id is "FirstName". When I post a...more >>

I would like to develop my ASP.NET application against a SQL 2000 database residing on another server, rather than against the SQL server installed locally. We're using Windows integrated security. When I'm using Visual Studio the ASP.NET user belongs to my XP machine's local domain, which is ...more >>

Hi. Is there any public statistic available of what percentage of Users have JavaScript turned off. Thanks. George. ...more >>

Thanks to info from Steven Cheng I am able to use an HTML button on my aspx page in order to wrap text in it. I am using it to delete a record in a database and it works. My only problem is that I want to include javascript to confirm the deletion before submitting. I have a javascript function...more >>

Is there a way to indicate on a datagrid which column the datagrid has been sorted by? By default, my customer list is sorted in customer name order, but if they sort by state, I'd like to indicate it on that column. SC ...more >>

Is there any size limit to a datagrid? I have one that has 11 columns and around 5,000 rows that I want to display. Reason I'm asking is that I get a challenge/response type of input if I try to do anything to this datagrid once it's displayed. Anyone know? SC ...more >>

If a child control is loaded dynamically during a host page event handler, the events of that control do not appear to be detected by the host page. If that same control is loaded in the same way during page_load or page_init, then the child's events are detectable. Is there any way to change the...more >>

I'm getting this following error: ------------------------------------------ Exception Details: System.ArgumentException: Keyword not supported: 'provider'. Source Error: Line 92: Dim objOleDbAdapter as new SQLDataAdapter(strChk, strConnect) ------------------------------------------ With ...more >>

Hello, I have an asp.net web page (1.l Framework) which has an onUnLoad function defined in the body. From this function I want to call a webservice, which I have defined using the webservice.htc in a div style attribute. I use this webservice call technique on many other pages without any...more >>

I have this class: Public MustInherit Class ucBasicListingUserControl Inherits System.Web.UI.UserControl Public Event OnDone() Public MustOverride Sub LoadData(Optional ByVal pstrSignalParam As String = "") Public MustOverride WriteOnly Property objListing...more >>

Hello all. Is there a way to count the number of instances the Page classes in a particular moment? I was just trying to think of a way to determine the total number of people that is on the web server at a particular time. Or, are there any better ideas? Thank you, Steve ...more >>

Hi, I store a button ID in my database, then when the aspx page is loaded I want to make the caption (text) of said button read something other than the default. How can I do this ? obviously I cannot do myreader("buttonid").text = "xxx" I tried looping through the controls but can't seem to d...more >>

How can I get the name and/or IP address of the PC that requests a WebForm The request is not made using a hypertext link I use JavaScript and C#....more >>

First, I am not the developer of this application, merely the system administrator. The developer is a contractor and somewhat unavailable at this time. Environment Microsoft Windows 2000 Server, IIS 5.0, .NET Framework 1.1 (with the hotfix applied). At random times, the aspnet_wp.exe stop...more >>

Hi Aside from actually trying to write a website in ASP.NET, I am curious what others have found helpful while trying to learn it correctly (Books, Downloads, etc). I have downloaded the IBUYSPY to get an idea but am a little frustrated. After reading some best practices material from Micro...more >>

Hi, I have my session.timeout set to 30. I have a page that can take up to about 10 minutes to process, and in the meantime they're re-directed to a "Please Wait" page. The problem I encountered was that all of my session variables were gone after about 10 minutes, and so I put a "Stop" st...more >>

I'm working on getting paging working for a repeater control. I'm following the tutorial at: http://www.sitepoint.com/print/asp-nets-pageddatasource I'm getting snagged on the following bit of code: Line 121: btnPrev.Visible = (NOT pagedData.IsFirstPage) Line 122: btnNext.Visible = (NOT p...more >>

Hi is it ok to use the absolute font size or am I better to use specific font size? Thanks ...more >>

Hopefully a simple datagrid question - Rather than have a select button column, which appears as a LinkButton, I want to display images in the column, and clicking the image should call the SelectedIndexChanged event. How can this be done ? Thanks, Andy Mackie. ...more >>

I'm using an xml document as the source for my site's navigation. I have it working but am curious if I've chosen the best method (performance wise) of reading this xml document. Becuase this xml file has my site's complete navigation, I need to "jump around" in it to get to the data I need based...more >>

Hi, I am wondering if it is possible to access a user's OS (WinXP Pro) from an ASP .NET web site using an ActiveX control. The purpose for accessing the OS is to write code that will access the embedded CD burning software that comes with XP (IMAPI service) so it will copy files from the us...more >>

Hi I have a control in page, how can I call the control's function from javascript (except submit or xmlhttp) Thanks in advanc ddt...more >>

Hi I'm using the html input type=file for uploading a file. I'm unable to change the style of "Browse" button that appears alongside the text box. So what I tried is I created one more input type = button , aligned the style of this to overlap that of the "Browse" button of file upload and ...more >>

I have to images for my image buttons. One image has a border around it(background) and the other doesn' t. What I would like to do is when the user clicks the button swap out the images on the mouse down click and when the mouse is released put the original image back. How can I do this?...more >>

Running ASP.NET 1.1 application on Windows XP Pro. Trying to connect to a SQL 2000 server as the annonymous user using a trusted connection. I keep getting: System.Data.SqlClient.SqlException: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. ...more >>

I am new to .NET and have been experimenting with ASP.NET and webservices. I have written a small app with just two simple webservices (Hello world-esq) but, when I run the app I get this message on the web server. The app seems to run fine but, I would still like to understand the error Aspnet_...more >>

hello I have Windows XP Pro and IIS 5.1 installed and I have written some ASP pages. Now I'm exploring the possibility of using ASP.NET in our project I've installed Visual Studio .NET 2003 Enterprise and .NET Compact Framework with ASP.NET 1.1. However, when I try to create a new VB.NET WebAppl...more >>

Hi, I am a couple of weeks into writing an intranet application and am discovering some big disadvantages to using the DataGrid control. Basically I have got HTML file being sent to client that are around 600kB!! When running this intranet app over slow VPN link it is not very quick!! I am...more >>

Hi I recently upgraded from VS.NET 2002 to 2003 (framework 1.0 to 1.1). When i tried to open my solution in .NET 2003 i got the following error: The Web Server reported the following error when attempting to create or open the Web project located at the following URL: 'http://localhost/da...more >>

Hello, how can I group everything between a tag like <title>xx22yyy</title> but ONLY word-charactor, NO digits. Result should be: Group: xxyyy Thanks for any help or for any hint where to post this to get help. Andreas ...more >>

Hi, I have an ASPX page which contains two custom web controls, and each one have its own save button, which needs to perform validation. My problem is, when I try to press save button for a form, even if all child controls on the web control are validated OK, the page perform validation for ...more >>

Hello folks, I create a couple of HtmlInputFile controls dynamically at runtime but I have no idea how to read out the file that could be uploaded from some of the controls. Just recreating exactly the same controls after postback doesn't work on Html Controls. Thank you ...more >>

I am sending an email using ASP.NET (C#) Below is the code. - str is a StringBuilder that contains the HTML text. The email is being sent but it is getting truncated. Anyone have any idea why? System.Web.Mail.MailMessage MailMessage oMessage = new MailMessage(); oMessage.Priority = Mail...more >>

Hi, I'm trying to add a button to an asp.net page that when clicked will run a batch file on the server. My code which gets executed on the click event of my button is as follows Dim ProcessStartInfo As New System.Diagnostics.ProcessStartInfo() ProcessStartInfo.FileName = "C:\Inetpub\wwwroo...more >>

Hi there I have been experiencing a very strange problem of ASP.NET. What happens is that ,all ASP.NET applications deployed on the server hang every morning. At this time,IIS successfully executes ASP requests When I restart my machine, it starts working again. Throughout the entire day, it does...more >>

Hi, When I am doing a POST to a SSL URL I am getting this error on first attempt "Cannot access a disposed object named "System.Net.TlsStream"." After the first attempt all works fine, here is the Stack Trace at System.Net.TlsStream.InnerWrite(Boolean async, Byte[] buffer, Int32 offset, Int...more >>

Hello, i am working on this for some days and i can't figure out what i am doing wrong. I have an ASP.net C# page which populates an ASP.net Calendar Control with events from an Access Database. IT WORKS! Now i created the same page in VB. I am not being able to make it work. I get an erro...more >>