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:
Apr 27, 2016
I have two datalist that bind from database and use linkbutton on these datalist
<asp:DataList ID="DLclass" runat="server">
<ItemTemplate>
<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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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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May 5, 2010
I have a HTML table in a webpage of an ASP.NET website.
I want this table to stay in the screen when I scroll the page.in fact it's like a toolbox for me and I should always have easy access to it.how should I do that?
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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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Mar 24, 2011
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?
Do I setup a javascript and pass the parameters to it and have it fill in the textboxes? I have other texboxes that the user has entered and need to keep that data there.
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Jul 22, 2010
I will show a message via label, make label visible.
once the label is visible is it possible to stay on teh page for 5 seconds and then redirect via response.redirect to another page.
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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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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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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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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
Next
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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
[code]....
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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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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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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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.
What can I do if I want it keeps the last entered value after inserting record ?
I need this because there are many items to insert and only partial fields need changes from last entered records.
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Jan 16, 2011
I read these words in a book:
Projectless development simplifies debugging: When creating a web project, you must recompile the entire application when you change a single page. With projectless development, each page is compiled separately, and the page is only compiled when you request it for the first time.
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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Apr 22, 2010
What's the best way to handle exceptions that happen from within a controller's constructor?
All I can think of to do is use Application_OnError() or put a try/catch in my ControllerFactory.
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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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:
[Code]....
Stack Trace: [Code]....
Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082
Here is my code
<asp:SqlDataSource
ID="SqlDataSource1"
runat="server"[code]....
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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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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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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"
[code]...
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Apr 3, 2011
This thing has just came to my head and I wanna share it.Note : I could easily test it but I am being lazy here to see if anybody has ever experienced something like that before.Let's assume that I have a web site which built-in membership structure of asp.net has been implemented on. What will happen to asp.net membership if the client browser blocks cookies? Does framework throw an exception when a user tries to log in or do something else?
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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
SqlDataSourceJustificationAttachment.Update()
End If
End Sub
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Nov 30, 2010
my C# console appliccation code is shown below :-
[Code]....
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:-
[Code]....
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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 .....
sqlConn.Open()
CallFunction(sqlCon)
sqlConn.Close()
End Function
Public Function CallFunction(ByVal con as SQlCOnnection)
..............
End Function
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