Web Forms :: Error Happen When Stay On Page For A While

Feb 27, 2014

I have view.aspx page that when I open page and don't do  any thing in this page i.e for 10 minutes when I come back to this page  after 10 minutes and click on hyperlink or button below error happen. Why this error happen?

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Similar Messages:

Web Forms :: Object Reference Not Set To Instance Of Object Error Happen When Use 2 Linkbutton

Apr 27, 2016

I have two datalist that bind from database and use linkbutton on these datalist

<asp:DataList ID="DLclass" runat="server">
<asp:LinkButton ID="Linkbtnclass" runat="server" CssClass="lbldasteM"
CommandArgument='<%# Eval("Name") %>' OnClick="Linkbtnclass_Click"><%# Eval("Name") %></asp:LinkButton>
<div id="MM31"></div>

[Code] ....

Here I want when click on linkbutton it change text's color so I wrote below code:

protected void c(object sender, EventArgs e)
this.GetCustomersPageWiseMC(1, (sender as LinkButton).CommandArgument);
BindDataListD(DLclassC, "classTI_documentry");
DataListItem item = (DataListItem)(sender as LinkButton).NamingContainer;
foreach (DataListItem dlItems in DLclass.Items)

[Code] ....

For Linkbtnclass_Click it worked correctly and when I click on linkbutton it change color but for LinkbtnclassC_Click  when I click on linkbutton it make this error:

Server Error in '/' Application.

Object reference not set to an instance of an object.

Description: 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.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 537: {
Line 538: LinkButton lb1 = dlItems1.FindControl("Linkbtnclass1") as LinkButton;
Line 539: lb1.ForeColor = ColorTranslator.FromHtml("#646464");
Line 540: }
Line 541:

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Want To Know What Will Happen When Page Is First Requested From Browser?

Oct 1, 2010

I want to know what will happen when asp.net page is first requested from browser.i.e ASP.Net Page Request Architecture

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Web Forms :: Want Html Table To Stay In Screen When Scroll Page

May 5, 2010

I have a HTML table in a webpage of an ASP.NET website.

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VS 2010 - Prompt User Before Navigating Away From A Page And Perhaps Stay On Page

May 15, 2012

I need to check information the user has entered on a page against what I have in my database to see if he is entering duplicate data. It is up to him if he wants to proceed or not. I just need to alert him.

The problem is I don't own the button that he clicks so I can't hook up a javascript confirm to the button click. I am running within vendor code. I have an "override PageLoad()" procedure where I can test what page they're currently on. If they are on page "EditForm.aspx" and would normally navigate to "UserFinish.aspx" without any custom code of mine "interfering", I want to test what they've entered on EditForm.aspx and present them with a popup if they've entered duplicate info, and if they click OK button then proceed to UserFinish but if they click Cancel then stay on EditForm.

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I am using a gridview as a dropdown extender for a textbox which works nice. I want to select a row in the gridview and fill in some textboxes with data from that row. I know how to do the Attributes.Add for cells in the RowDatabound event. But I have always passed the cell data to another page as parameters. How can I stay on the same page and fill in the textboxes?

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How To Stay For 5 Seconds On The Page Before Redirecting To Another Page

Jul 22, 2010

I will show a message via label, make label visible.

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Keep Target Page Stay In JQuery Thickbox After Post Back?

May 12, 2010

I have an asp.net page "demo.aspx", that has a normal link called "Demo Link" which uses jQuery Thick box. The page that is wrapped inside the Thickbox is "target.aspx", that has a button "Demo Button" and a label.

If I click on the Demo Link, it show the "target.aspx" wrapped inside the Thickbox nicely. However, If I click on the "Demo Button", Thickbox is disappeared, "target.aspx" is not wrapped in Thickbox anymore, it is displayed like a normal asp.net page.

Here's the mark-up code of demo.aspx:

<a href="target.aspx?height=600&width=800" class="thickbox" title="">Testing Thickbox with Post-back</a>

Here's the code-behind of target.aspx:

Protected Sub btnDemo_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnDemo.Click
lblDemo.Text = "Hello World!"
End Sub

How do I keep target.aspx in the Thickbox after the post-back of itself?

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Web Forms :: Redirect Parent Page To Error Page If Error Occurs In IFRAME Child Page

May 7, 2015

I have a data driven asp.net website with frames on the top, left, right and center screen.  If a page generates an error on any of the frames, I want to redirect the whole site back to the Default.aspx.  Currently, when a frame page errors in one of the frames, that frame gets the error pages.  Site is URL....  Is this something that can be handled?

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Web Forms :: Cursor Stay Down When I Click Submitbutton?

May 15, 2010

i have textbox and submitbutton at bottom of aspx page when i click submitbutton cursor moving to top of the page, actually i want cursor stay down

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Is That Really The Possible Thing To Happen When Hiding A Datafield

Aug 23, 2010

My code below has a drawback. The scenario is this, i have two user roles - Approvers and Encoders. The encoders are not allowed to view the price only the approvers. Using the code below, i can now hide the Price column. but the problem is, when the encoder modified the quantity column, the Total Amount (Quantity * Price ) is zero. Giving zero value for price. When the approvers view the transaction,the Total Amount is zero. Is that really the possible thing to happen when hiding a datafield?

HTML Code:

For Each colField As DataControlField In colFields
If TypeOf colField Is BoundField Then
Dim bField As BoundField
bField = CType(colField, BoundField)
If bField.DataField = "ReceivPrice" Then
bField.Visible = False ' Hide Price Column
End If
End If

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Validation Didn't Happen On 2nd Time Around?

Jan 18, 2010

I have a Page_load sub with the following:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

If Request.ServerVariables("SERVER_PORT") = 80 Then
Dim strSecureURL As String

The validation load in this page worked on the first click of btnDonation, if I don't change anything and click the btnDonation again, it automatically go to my confirm page. Instead, I want it to continue to check for requiredFieldsOK(). Note that if I fill in one of the missing required fields, the validation will work.

My question is: How can I continue to check for requiredFieldsOK() even if user didn't fill out any additional information?

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Web Forms :: Calender Doesn't Stay On The Screen While Using DatePicker Control

Aug 9, 2010

I've a dataentry screen where I've to give the users aprovision to enter date and for doing that I've used a DatePicker control. The problem is when I'm clicking on the next/prev button to change the month of the calender, the calender is not staying on the screen. So in order to select other month the user has to re click on the button. find below the stepwise description of the problem I'm facing.

1. I click on the calender icon and the calender popps up.

2. Now user tries to navigate months (i.e June to July or June to May) using Next/Prev button of the Calender Control.

3. When Navigating from current month to next/prev month I want the calender to be shown on the screen but actually on click of the Next/Prev button one postback is happening hence I'm loosing the calender from the screen as the calender is loaded again.

4. I'm getting the selected date using onselectedChange event handler.

5. The users will have to click the button again if he wants to navigate to another month.

Is there any way to keep the calender on the screen during the month got changed.

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Forms Data Controls :: Scrollable/ Keep The Header Stay In The Same Position

Mar 7, 2011

I lost the links that someone posted me how to make the gridview to have scroll bars.

I restate my question:I have a gridview to show about 20 records. Now put the gridview into a <DIV>.

Would like to know how do I make it scrollable but keep the header stay in the same position?There is a header for columns in my gridview.

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Forms Data Controls :: How To Set FormView To Stay With Last Selected Value After Inserting

Feb 10, 2010

I have a FormView in default insert mode.

When I inserted item to database, the Form refresh and return to all blank or standard selection.
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I need this because there are many items to insert and only partial fields need changes from last entered records.

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I read these words in a book:

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How does compiling happen only for the first time in projectless development?

Should it recompile every time I run the page to reflect the new code I wrote it?

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What's the best way to handle exceptions that happen from within a controller's constructor?

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Neither of these solutions seem ideal. Application_OnError is to broad - I have some non-mvc content in the site that has its own error handling. Using a try/catch block seems kinda hacky.

If I'm serving different content type -html/text/json/rss.... I would like to be able to handle the exception from within the action method instead of having to write all kinds of conditions to determine what kind of error message to serve.

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Forms Data Controls :: Add An Update Command To Page And Run The Page Getting Error Message - Server Error In '/MYApplication?

Feb 22, 2010

When I add an update command to my page and run the page I get this error message

Server Error in '/MYApplication.

Incorrect syntax near '-'.Must declare the scalar variable "@recnum".

Description: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.

Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near '-'.Must declare the scalar variable "@recnum".

Source Error:


Stack Trace: [Code]....

Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082

Here is my code


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Forms Data Controls :: Stay With The Selected Position In Grid View?

Sep 13, 2010

I've got one columns of check boxes in a GridView, when i select the checkbox entire record(75 columns) is poupulated into formfileds resided just below the gidview. The problem I'm having is that when i selelect 50th record of database(db have 100 recrds) the view state should be on 50th record level but it is scroll over to the toplevel after selecting the checkbox, if user wants to select the 51st record again he scroll to that level.

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Forms Data Controls :: Gridview Stay's In Edit Mode After Update?

Feb 8, 2011

my gridview doesn't return to readonly mode after an update. i have set the editindex to -1did the databind() for the gridview too. but nothing works.setting keepineditmode to false doesn't work either.he documentation says that the gridview automatically returns to readonly after pressing the update button.my gridview is on a panel, and that panel is on an update panel.

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Forms Data Controls :: Headers To Stay Fix While Vertical And Horizontal Scrolling?

Nov 10, 2010

Newbie to ASP.net. Programming in C#.I'm querying a SQL database and displaying the results in a gridview. The results can be many records so I need to provide the facility to scroll vertically and horizontally. To display the headers when scrolling I have implemented ( in my asp code) the headers in another table and the data is in another table. I see now I cannot align the column headers with the table data.Appreciate any help to fix this issue. ( What I need is a similar to the freeze function in excel where you can freeze the header while scrolling horizontally and vertically)If this method is not a good one to display headers with data please suggest another methodHere is my ASP code.

<div id="divProjectTableHeaderFullDetail" runat="server" style="background-color: #993300;
height: 40px; width: 770px; margin: 0; padding: 0 ; " >
<table style="font-family: Arial; font-size: 10pt; color: white;" cellspacing="0"


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Button1.Disable=false Doesn't Happen Immediately?

Dec 13, 2010

I have a Wizard which has a FileUpload in one of the steps. It also has an "Upload" button. When the user browses to a file, and clicks Upload, I upload the file into SQL.

There seems to be some synchronization problem for very large files, and I would like to disable the Wizard's Next button until the Upload of the file to SQL completes. It can take a while, especially on a wireless PC.

In my OnClick event for the Upload button, I am trying to disable the Next button. The code, which is below, appears to be correct, but the Next button doesn't actually disable until the Query completes. Can I get the Next button to disable immediately instead of after the SQL Update completes?

Here is my code:

Protected Sub JustificationDocUploadButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles JustificationDocUploadButton.Click
If RequestJustificationAttachment_FileUpload.HasFile Then
Dim obj As Object = Wizard1.FindControl("StepNavigationTemplateContainerID")
Dim startButton As Button = obj.FindControl("StepNextButton")
startButton.Enabled = False
End If
End Sub

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Web Forms :: Error On Clicking Link-Cant Redirect To Target Page-Error Page Is Shown?

Nov 30, 2010

my C# console appliccation code is shown below :-


In my application a mail message send to particular recipeeient with msg body contains a hyper link.. when the recipent click on this link,it will redirect to another form(InternalForm.aspx)... bt when clicking the link error is occured,whuy its happening???? In InternalForm.aspx,page load portion access the link content(badgeno).. page load portion code of InternalForm.aspx is shown below:-


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Jun 12, 2010

what would happen if I pass an "Open" SQCConnection object to another function ? I open and Close the connection in my calling function. But would the copy of the object that I passed onto the other function remain Open ?

ie :

Public Function CallingFunction()
Dim sqlCon as New SQlConnection .....
End Function
Public Function CallFunction(ByVal con as SQlCOnnection)
End Function

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