Web Forms :: How To Retrieve Variable Value Across Page Postbacks
Jan 23, 2010 I have a value variable as: Dim Tax As Decimal = total * 0.075
i would like this value be available to sub procedures on the page even after a postback?
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Jan 13, 2011In my base class:
[code]....
In my user control that inherits from BaseUsercontrol The ascx has:
<asp:Button id="btnTest" runat="server" OnClick="OnButtonClick" />
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Nov 24, 2010I use C#, asp.net 4, EF4,
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In code behind I need to create a variable that will populate with data from EntityDataSource, lets imagine field UserId.
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Feb 21, 2010I'm working on a wizard-like set of page, and I'm relying on cross page postbacks to navigate between them.
I need to be able to trigger the Load event on the previous page in order to save the form data for the page.
I've been told that for situations of this sort all I had to do is access the PreviousPage property in the destination page and this would trigger the load event of the previous page but for some reason this doesn't seem to be working.
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Cross-page Postbacks And Back Again Retaining Data From Source Page?
Sep 17, 2010Is it possible to use cross-page postbacks (or a similar method, perhaps Server.Transfer) to post form data (say, Data-set A) to a page, which then allows the user to add some additional information (say, Data-set B) and then postback to the original page the complete set of data (A+B) which then flows through the normal event execution process, similar to as if all data A+B was submitted on the original page to itself in a normal postback?
I don't want the second page to have any type knowledge of the original page, it just needs to supply two additional feeds and send the data on. This way different pages and controls could use this method for gaining additional data.
For example:
Page 1 could have a form with various text inputs, and two hidden fields Hidden1 + Hidden2 which are empty.
When the form on page 1 is submitted the user is presented with page 2, they complete that page and then all the form data from page 1 is posted back to page 1 but with the hidden fields 1 + 2 complete. Page 1 then has all the information it needs to complete.
I'm thinking that perhaps page 2 just needs to use PreviousPage and take its post data, add to it and then post it back to page 1, but as if it came from Page 1 and not Page 2. But I'm not sure if this is possible and ASP.NET might read this as tampered data?
Using Update Panel In Page For Partial Page Postbacks?
Dec 30, 2010I am using update panel in my ASP.net page for partial page postbacks. I have gridview and a button "Export" which on click will call the Export method from the below class. If I remove the update Panel everything will work as expected. But if there is a update panel it will not work and throws this error.
Below is the code for the
using System;
using System.Data;
using System.Configuration;
using System.IO;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
[Code]....
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[Code]....
<truncated>
What I want is to grab the screenshotId from the SqlDataSource when the usp_GetOrderDetails stored proc gets called and populate it into a field on the page called screenshotId. I then want to use this screenshotId to get an image from the database based on Id. populating the screenshotId field. How do I do this - do I need to have something like OnDataBound or something like that?
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View 4 RepliesMultiple Postbacks Of ASPX Page?
Nov 19, 2010I have an aspx page with a simple form to send emails to pre-defined lists of users. On the longer lists the page usually times out before the emails finish sending but this has never been an issue. Today something weird happened and each user got four emails. In the log I could see three new threads crank up one at a time and start over sending from the beginning of the list.Any ideas? I absolutely know I didn't intentionally refresh the Web page myself, and certainly not three times. But could the browser (IE8) have done it? Would it post again trying to re-establish a connection when it timed out? Or when I switched back to the browser window from another app? I have never seen behavior like this before.
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View 2 RepliesAJAX :: Page State Lost During Postbacks With Updatepanel
Jan 14, 20101. I have couple of checkboxes and some text fields outside the updatepanel.
2. Based on the checkbox selection, I will be hiding/showing the fields to user using javscript.
3. I have a upload control in the same page which is placed under the updatepanel. When I upload the file, I will be reading the content of the file and I'm trying to load it into the controls which are outside the updatepanel. As I know the controls won't updated until unless it has been added under the updatepanel.
4. I moved all the controls outside the udpatepanel (checkboxes and textboxes) and placed it inside the updatepanel so that when the file is uploaded I can read the file and assign to the controls.
After this, I was able to assign the values to the control. However, the problem is, the state of the page (javascript hide and show) has not been retained during the postback. For example, if i have 2 checkboxes and 2 textboxes, if i click firstone, it should show the first checkbox. If I click the second checkbox, it will show the second textbox. By default, when the fresh load happens, first textbox will be shown. When I click the second checkbox (its showing the second textbox) and do the postback by uploading the file, the state gets lost and when the page load completes, it's showing the first textbox instead of showing the second textbox.
State Management :: Persisting DropDown List Attributes Across Page Postbacks?
Oct 12, 2010how can DropDownList attributes be persisted accross page Postbacks?
Example:
DropdownList1.AutoPostBack = True
DropdownList1.items(0).Attributes.Add("Attribute1","somevalue")
On Postback the attribute is no longer available (ie. attributes.count=0).
I tried persisting using the code below, but was unsuccessful:
Before PostBack: ViewState.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = ViewState("DDL")
This generated the error: DropDownlist is not marked as serializable.
I than tried:
Before PostBack: Session.Add("DDL","DropdownList1")
On PostBack: DropdownList1 = Session("DDL")
This did not err but attributes were still not available.
AJAX :: UpdatePanel Inside Master Page Performs Full Postbacks?
Jun 1, 2010I have marquee control inside a Master page.I used timer control to refresh marquee for every 5 mins.And it is placed in update panel for implementing partial postback.
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Jan 2, 2011I am currently able to pass parameter from 1 page to another but I am unable to retrieve it.
<asp:HyperLinkField DataNavigateUrlFields="ID"
Web Forms :: Content Page Retrieve Info From Master Page Form?
Dec 7, 2010I have a master page with a form on it. It's a people search form. When the user clicks on the search button it goes to the search results page that uses the same master page. With the code below I get the info off the master of the current page. Howdo I grab that info from the first page?
Here's the code:
Master page:
< FORM id=formEmpSearch method=post action=~/About/peopleSearch.aspx runat="server">
< asp:TextBox style="WIDTH: 153px; HEIGHT: 12px" id=txtSearchName onfocus="this.value=''" runat="server" CssClass="searchBox">
Master Code Behind page:
Imports System
Imports System.Web.UI
Imports System.Web.UI.WebControls
Partial Class mstrIntranet
Inherits System.Web.UI.MasterPage
Public Property mSearchName()
Get
Return txtSearchName.tex
End Get
Set(ByVal value)
txtSearchName.text = value
End Set
End Property
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
txtSearchName.Text = "People Search"
End Sub End Class
Search Results Code Behind page:
Partial Class PeopleSearch2
Inherits System.Web.UI.Page
Public SearchName As String
Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim mpTextbox As TextBox
mpTextbox = CType(Master.FindControl("txtSearchName"), TextBox)
SearchName = mpTextbox.Text
Forms Data Controls :: Retrieve Primary Key From One Page In Another Page As Foreign Key?
Jul 29, 2010I have two tables - Advert and Student
adID is the primary key (Advert) and acts as the foreign key for Student
I have two pages, both of which each have a detailsview in insert mode
what I want to achieve is to create a new record in advert.aspx (e.g. adID = 4), then when item is inserted, redirect to page student.aspx (which a student record is created) where the foreign key is the ID from the advert just created (e.g. student.aspx?adID=4).
Web Forms :: Update Variable On Master Page From Another Page?
Feb 9, 2011I have some Google Analytics code on a master page that contains a string variable.
[Code]....
Now on my contact page, I want to change the value of that variable depending on whether or not the contact us form was successful or failed due to required fields not being. First I'm setting the value to empty in PreInit.
[Code]....
On pageload I have this, which seems to work fine...this is being set.
[Code]....
Then on button click for sending, if all is well, I am updating the value of the master.VirtualPageview value like this:
[Code]....
Now the weird part. Even though the master.VirtualPageview gets it's value set properly for the success or failure, when the page renders and I view the source, it doesn't have the updated value of
[Code]....
For the life of me, I can not figure out why this is happening. If anyone has had similar issues, or could explain what I'm doing wrong,
C# - How To Dynamically Retrieve All The Possible Attributes (variable Attributes) Values Of One Of The Xml Node
Aug 10, 2010I am using the following XML structure
<SERVERS>
<SERVER NAME="A1" ID="1"></SERVER>
<SERVER NAME="A2"></SERVER>
<SERVER NAME="A3" ID="3" Parent="XYZ"></SERVER>
<SERVER NAME="A4" ID="4"></SERVER>
<SERVER NAME="A5" Parent="abc" value="10"></SERVER>
<SERVER NAME="A6"></SERVER>
</SERVERS>
I am accessing this xml file by using LINQ to XML in asp.net by using C#. I am able to access all the attributes of an XML node by explicitly specifying the name of the attribute. I want to write query on this xml file which reads all the attribute values of the xml node (In our example the node is SERVER) dynamically means I want to write the query which can read the read the value of the attribute Name & ID from first node, only name from second row, Name, ID & Parent from the third row , Name & ID from the fourth row, Name, Parent & Value from the fifth row & only Name from the sixth row without modifying the existing code every time. Once I add one of the attribute ( for example if I add the attribute ID in the sixth row ) in the above xml file then I dont need to modify my LINQ to XML query. My query should dynamically fetch the total number of attributes & display their values. Is their any way to do this ?
Data Controls :: Retrieve Data In Variable From Ajax
Apr 27, 2016my code is running correct and all information of table comes in alert giving the formate ..
but i want to retrive value in variable to append customized design result in ajax
using System;
using System.Collections;
using System.Configuration;
[Code].....
i want to this data in div and table so how can retrive this data in ajax in a variable for customized design ...
Web Forms :: How To Retrieve A Value From Master Page
Apr 26, 2010I have a masterpage with dropdownlist and in child page i want the value of that dropdownlist. Postback in childpage hit before selectedindex changed of dropdownlist. what shalll i do?
View 3 Replies