Web Forms :: Saving Data For Postbacks?
Dec 31, 2010
I would like to save some data for use after a page postback. Here is an example of what I'd like to do:
Partial Class TestPage
Inherits System.Web.UI.Page
Private _CategoryID As String = ""
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
_CategoryID = "ABC"
Me.ViewState("CategoryID") = _CategoryID
Else
_CategoryID = CType(Me.ViewState("CategoryID"), String)
End If
End Sub
End Class
I've tried both session variables and view state. The page loads fine initially, but on postback I get the following error:
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
What am I doing wrong? How can I save this data for use after postback?
View 7 Replies
Similar Messages:
Mar 28, 2011
I have a situation where I send data to different domain and return back to my domain. At this point I'm losing my form data. I know that we can use sessions, cookies or query strings. But i have large data in the form. So I can't use those. Can anyone best way to save form data between postbacks and redirect.
This is code which I'm using to redirect to different domain and come back to my domain:
[code]....
View 3 Replies
Jun 30, 2010
I have a grid and there are several dropdowns in a row of the grid.The dropdown selection change is driving other dropdowns in the row.
I put the dddls inside UpdatePanels still dropdowns are losing the tab position after a partial update. How is this generally done?
View 1 Replies
Feb 3, 2011
I have a gridview with scroll enabled. Means i have a gridview like this-
[Code]....
I want during postbacks scroll position of my gridview will not change. I have tried many articles on the web, but in some scrolling is retained only in IE, in some others scrolling position changes on clicking edit link of gridview. I want a good solution for IE, FF, Chrome
View 1 Replies
Apr 4, 2011
Alright, so here's my basic ASP.NET page setup: I've got a page with a GridView that has ContentTemplates in it. You can add a row and edit/remove rows at any time. There's a "New" button that creates a new row.
All of this data is bound to custom data objects. So if I have a GridView of "People" and each row has "FirstName", "LastName", and "Gender" (with TextBox and DropDown controls), I then have a "Person" object which has public properties for "FirstName", "LastName", etc. I have the binding set up correctly, and I can push data into the GridView from the object, and I persist the object with the Session variable. My page lifetime structure looks something like this:
Page_Load: Loads the List(Of Person) from Session()
Any events fire, and modify the List(Of Person).After any event, the List(Of Person) gets saved back into Session(), and is then DataBound to the GridView (and any subsequent fields are also DataBound, such as the DropDownList.
My question is: Whenever I fill in rows in the GridView, and then add a new row (there is no database saving going on whatsoever), my fields clear out and don't persist across PostBacks. So, how can I persist my custom data objects with databinding across postbacks?
View 2 Replies
Apr 1, 2010
Using the Interop for Excel 2003 I had a nice little link that saved or opened the repeater content as .xls. Now we are using Excel 2007 and I get file format error messages. When I click the OK button on the error pop-up Excel closes. Does anyone out there know how to convert my code to handle the .xlsx format? I've been reading up on Interop for 2007 but none of the examples seem to work for this particular simple task. Here is my code from the "Export to Excel" button click:
Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExport.Click
' Send HTTP headers that specify Excel filename, MIME type, and character set
Dim sTemp As String = "attachment;filename=CoverageCase" & Session("OpenCase").casekey.ToString & ".xlsx"
Response.AddHeader("content-disposition", sTemp)
Response.ContentType = "application/vnd.ms-excel"
Response.Charset = ""
' Create objects used to render the controls
Dim strw As New System.IO.StringWriter........
I found a thread from a couple of years ago dealing with this but there was no solution [URL]. There were a couple of tortureous work arounds but neither work for me.
View 10 Replies
Mar 26, 2010
I have a gridview, where I set the columns based on the columns in a datatable. I have a class that implements ITemplate, and creates a textbox template field. Everything works good, I can display my grid with the correct columns and headers. The probem comes up when I click a Save button, to save the user input. Of course the page postbacks, and I re-create the columns on PageInit. However, all the data the user entered is gone.
View 2 Replies
Jan 27, 2011
I am saving grid data. Grid contains one textbox in item template column. But it was not saving any data, which was entered in textbox(Just saving 'NULL'). There was not error while debugging. Below is code i am using.
[Code]....
View 2 Replies
Nov 26, 2010
I have a registration form which is divided into
1)User info(All user registration details)
2)Payment Method
3)After complete payment transaction i need to save user details at a time after the complettion of step 2 in sql server DB three table
1)user 2)orders 3)plans
If two or more request came at same time how will distinguish them?
View 2 Replies
Jul 8, 2010
i have done a small code like if i enter some value in my text box i will pop up a new form corresponding to the value entered i will take the values from the pop up form and click on save and i am redirecting to the previous page and will click on save now i would like to save the data along with the data that is entered in the pop up form
Ex : My first form is like
Name ABC
Address XYZ
Value 3 Here when i enter 3 i will get a pop up if i click on save it will take input 3 times from the user. That data should be carried to the prev form and wiil fill the remaining values in that form and click on save
Phno 12345
now i would like to save my text file as
ABC XYZ 3 12345
View 3 Replies
Mar 6, 2012
i have performance issue when accessing the web application which is datacentric & populaed in a grid
ijust came across storing the data in applicatin or seesion using datatable
i have cutsom paging & navigation causes lot of time though i display records on request
mean my page size is 75 records / page & at at time only 75 records are fetched i have a query accordingly with the total records of 6780 records
i need to optimize the performace so how do i save it in session or applicatin object & use it
View 1 Replies
Jan 29, 2011
i want to save data from three textboxes into one cloumn of database. i have there text boxes for phone no field..one for country code, 2nd for area code and third for number..
View 3 Replies
Aug 28, 2010
I have in the past saved data to my SQL database using only asp:textbox control, now I have to use the input text html control instead, can I save the data from this control in a similar manner..or do I need to use a hidden field to so the data can be saved..?
View 3 Replies
Feb 17, 2011
I created a column named InputUserId for the purpose of saving the user's id upon inputing data using formview(so I know who inputed). I would like the user's id to be saved in the table (column InputUserId) and the table's Id (RId) to be saved in the user's profile.
View 8 Replies
Jan 26, 2010
I first create a Dynamic table with textboxes and other controls in the cells. A user then enter data into the controls and I try to save the entered data to an access database. but when A save button is pushed the controls are not found.
I have a basic one cell asp:table on the page called "Table1" and then I append this table by using the Controls.Add(TableBuilder()) function in the Page_Init().
How the code basically works:
Public Function TableBuilder() As Table
dim r = New System.Web.UI.WebControls.TableRow()
Dim c = New System.Web.UI.WebControls.TableCell()
a = New TextBox
a.ID = "Sunday"
c.Controls.Add(a)
r.Cells.Add(c)
Table1.Rows.Add(r)
TableBuilder = Table1
The table shows up fine but after I press the save button I look for the created control to get the value the user entered it says the control is not there.
SaveButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim txtSunday As TextBox = Master.FindControl("MainContent").FindControl(("Sunday"))
UserEnteredData = txtSunday.text
But if I call TableBuilder() at the start of the function the control is found but the value the user entered is gone.
SaveButton_Click()
TableBuilder()
Dim txtSunday As TextBox = Master.FindControl("MainContent").FindControl(("Sunday"))
UserEnteredData = txtSunday.text
View 4 Replies
Sep 6, 2010
Detailsview edit not saving
View 3 Replies
Jul 8, 2010
save the Mulitple checkboxes in Gridview in once. I want to save only those rows which are checked.. not the once which are not checked. There is a row in gridview which has four checkboxes in each row, so i want to save the row in which either or all of the checkboxes are checked and ignore the once in which anyof checkbox is not checked.
View 4 Replies
Jan 31, 2011
I have the following code to 'save' a GridView on a page as an excel file, but it pops up a dialogue screen asking the user to view or save.
[Code].....
View 1 Replies
Apr 19, 2010
I am displaying data in a Webform View..i need to save the webform view as an HTML file ..
this HTML file will be viewed later using internet explorer.
i was not able to save the webfom as... it is grayed out..
View 2 Replies
Jun 9, 2010
how to save record in GridView into SQL server?
View 5 Replies
Nov 22, 2010
I have a column value on a Formview and I want to change it at the last second to a programmatic value.
So I created this function to work on ItemUpdating so that the value of one of the formview fields could be changed programmatically to a constant I do a response.write value to make sure there is something in there. However, checking the database, the only getting written is null:
[Code]....
View 1 Replies
Apr 15, 2010
I'm getting an error message: 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: [Code]....
I am trying to bind my dataset to a datalist. I know I can use a databind methed but Im also trying to do something else like modifying the dataset. What I want basically done is, if the user is not signed in, it will populate my datalist which is mostly checkboxes with texts. But when the user is signed in, i want his history of his checkboxes that was save onto the database.
[Code]....
View 3 Replies
Jul 4, 2012
I used the following link to add textboxes inside Gridview and saving data to Database.URL...The above article is very useful, but my problem is I want the Textboxes to be display in Rowwise instead of Columnwise. Means like I need to display is
Name texbox1
Age texbox2
Salary texbox3
SAVE ButtonThen SAVE button to save data entered in the textboxes to the database. Gridview design to achieve like this.
View 1 Replies
Nov 1, 2010
I am using IIS Url rewrite to convert urls from /mypage.aspx?q=value to /page/value.html.
Everything works fine during the first call to the page but on postbacks the url is transformed into
/page/value.html?q=value
when using asp controls such as GridViews, Pagers or Custom Controls.
As a result the Server returns a 404 Error and i can see the corrupted url on the browser's address bar.
This problem was observed when i wanted to change the page of a gridview using a pager.
View 4 Replies
Feb 14, 2011
I have a gridview thats being populated from an excel file that is loaded through a fileupload control. I want to save the contents of that gridview to a table in my SQL database. I've searched the web and tried to loop through the gridview, but failed at it.
View 4 Replies
