[Code]....
I have tried different ways. ... How do I test my integer column for DBNull?
I tried
If IsDBNull(Advlnk.RMTest)
Then
Response.Write(
"this is null")
and this doesn't work either.
Basically, what I did is that: I have a table in SQL database and some of data fields allow null. I built Objectdatasource through dataset. When I built update page using dataset. It generate the following error before showing the update page correctly. It seems I have issue to retrieve the null value from the database through using objectdatasource through dataset. Any suggestions?An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code
View 6 RepliesI am trying to write a table output from SQL database to a gridview/ Data List through an Object Data Source. I am a new starter and your help will be useful.
public List<Staff> GetStaff()
cmd.CommandType =
SqlConnection con =
new
SqlConnection(connectionstring);SqlCommand cmd =
new
[code]...
I have a functionality working ( functionality for making controls visible / true false ) on my development system having windows 2008.
But the same is not working on production server having windows 2003 on IE.
Ajax I have used update progress. its working fine on local system, but not on web server. Actually pagepostbacks.on server there is IIS7.
View 5 RepliesI have a Web App (VS 2010 Beta 2, using VB) and it works flawlessly on the development system. When I publish it, everything works fine unless I use an update panel. If I use the update panel, and try to use something such as a dragpanel, I get the following error.
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E)
Timestamp: Thu, 4 Mar 2010 14:54:25 UTC
Message: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 404
Line: 784
Char: 13
Code: 0
Case "System.Int32"
Return Convert.ToInt32(a) + Convert.ToInt32(b)
Object cannot be cast from DBNull to other types
I am LINQ querrying against a datatable. However, I am unsuccessfull with catching null values. Here is my code that is giving me the following error.
[Code]....
I am checking to see if minperc is null. However to check that it still is trying to convert the value to double. Cant figure out a way around it. Here is the error: Cannot cast DBNull.Value to type 'System.Double'. Please use a nullable type.
We have a Page Method on a web page using ASP .Net. We tried to put in a trace statement using both System.Diagnostics and System.Diagnostics.Debug. In Visual Studio 2008, the break point is not even hit for the line, but other break points on other lines are hit.There is no output from either method that we can see.
There is also a Global.asax error catcher that works fine in other cases, but in the Page Method is not being catched.why a Page Method and System.Diagnostics do not play well together?
I have developed a ASP.NET C# web page which connects to remote conmputer command prompt using PSEXEC.exe and executes some command where the output of the command will get copied to the page. It works fine in the VS 2005 IDE.
If the page is accessed via IIS from IE, the task PSEXEC.EXE appears in task manager of the server with the system account privilege after the method is triggered but nothing happens.
find my present settings in IIS and others:
1. APP Pool Identity to Local System (Predefined) and also to a configurable admin account.
2. <processModel userName="SYSTEM" password="AutoGenerate" /> in Machine.Config file
Also I've tried impersonasation in web.config file to an admin account.
Code Is:
[Code]....
public class foo : System.Web.UI.Control
{
public foo()
{
var a = new HyperLink(){ Text="Test", NavigateUrl="~/abc.aspx"};
this.Controls.Add(a);
}
}
The above code works properly, and when added to a page will successfully identify the tilde / ~ symbol and convert the url into a relative url.
However, when I change the derivation of the class to System.Web.UI.WebControl it does absolutely nothing, and leaves the tilde / ~ intact.
I had a look at System.Web.UI.Control which implements the IUrlResolutionService interface, but still can't seem to get System.Web.UI.WebControl to resolve urls.
I have a method which must be run every 5minutes in order to show latest data in gridview.
I was experimenting with System.Timers.Timer and the following is my code:
[code]...
the problem is that after 5minutes it is not going to t_Elapsed. Note this should keep being done at all times not just for once.
I have installed VS2008 on my development machine have winxp sp2 OS.i have created one aspx page where i have placed one button. On click of that button i want to open osk.exe(on screen keyboard). i an using following code
System.Diagnostics.Process.Start("osk.exe")i works fine there.Now for testing i deployed that application to testing server having Win7 OS and IIS7.0. It is not working there.
I am using System.Net.Mail in C#.net website. Basically, I use this to send email alerts to users when some action has occurred.
The problem is, when some PC's are used to trigger an email, nothing happens. I have 2 PC's in my office, and when I do the action on one of them, it works, but not on the other. Why is that?
Also, when an action is triggered by the login page (email reports), it works everywhere, but not on other pages.
I thought C# was server-side code? Shouldn't everything work or not work based on what the server has installed?
after creating a xsd dataset in one machine when i try to use the another in a application in another system though i can use it for fetching records & all i am not able to confidure it or preview data.i already have the connectin string in web config.what changes needs to be done so that the dataset from system 1 can work in ssytem2
View 1 RepliesIn a page (not default) I have:
Protected
Sub Page_Load(ByVal sender
As
Object,
ByVal e
As System.EventArgs)
Handles
Me.Load
Try
loginRep = BusinessLogic.SR.GetUserName("99999")
System.Web.HttpContext.Current.Items.Clear()
System.Web.HttpContext.Current.Items.Add("RepId",loginRep)
I don't any errors and when in the run in the immediate window:
? System.Web.HttpContext.Current.items("RepId") in the immediate window on THAT page I get the OBJECT.
Then I have a hyperlink with navigateurl to the next page "~/ActCnt.aspx"
On that page, ActCnt.aspx, when in the code I have:
Protected
Sub Page_Load(ByVal sender
As
Object,
ByVal e
As System.EventArgs)
Handles
Me.LoadIf
Not Page.IsPostBack
Then
Dim loginRep
As BusinessLogic.SalesRep = System.Web.HttpContext.Current.Items("RepId")
In the immediate window ? System.Web.HttpContext.Current.Items("RepId") returns a String that is equal to "RepId".
Even if I change it to not be an object, but a string I only get the Name "RepId" of the keypair. I have NEVER gotten the actual value.
I have a sitemap of 5 items. 2 items i only want the admin to see. I want the user to be able to login and the system recognise who it is and if an admin, bring up the 2 items in the sitemap. If not an admin, hide the items.
View 3 RepliesI've an application where in am trying to show a slideshow directly on page load.. for that am using the following code
[Code]....
Its perfectly working on the dev environment but when deployed onto iis7.. am not able open the file..
I've given all folder rights for asp.net account and network service..
Url rewriting not working on live server in asp.net but locally working fine. but locally it's not case sensitive.
View 1 RepliesI have a login control that is working beautifully on my localhost, but not working on the server. It validates my username & password - and gives me an error if I enter an invalid username/password. However, if I enter the correct username/password, the page refreshes, but does not redirect me to the "ReturnUrl" that I see in the URL. I've seen posts on this, but nothing that I tried worked. I've tried setting the 'MembershipProvider'attribute of the login control. I don't want to set the DestinationUrl...I want it to take what is in the ReturnUrl in the querystring. I don't think it's a web.config issue cuz it works on localhost??
View 3 Repliesis both same
View 1 Repliesim getting a value from the database. it came out an error saying "Conversion from DBNULL to Double is not Valid." anyone,
[code]...
im getting a value from the database. it came out an error saying "Conversion from DBNULL to Double is not Valid."
Public Function Total() As Double
Dim Total As Double
Dim strConn As String
strConn = ConfigurationManager.ConnectionStrings("***").ToString
[Code]....
in its webconfig file i have
<identity impersonate="true" userName="webserverloginname" password="webserverpassword" />
sername1= username of the system
password1 = passowrd of the system
username2= username of the the database
password2 = passowrd of the database
client system which access the database server aswell as web server
In machine XPSP2, I tried to install SQL SErver 2005 express edition (downloaded from the microsoft site) - after mode selction form (Windows/SQL server authentication) - system restarted, automatically.Again restarted, Again restarted,Again restarted,Again restarted,a 1000 times or more.finally I unplugged the system from the UPS
View 2 Replies
