Is it possible to do postback dynamically in vb.net or c#.net?
THere is a asp button (let say buttonA) if i click buttonA it has to do some actions and then trigger postback
postback should not be triggered onclicking a button . only after performing some actions it has to trigger postback
I have a form that has an array of dynamically created labels of varying size based on a search from a database. The problem I'm having is that when the user searches for a different term, it looks like some of the labels don't get new values. Here's my code for adding the labels:
If rdr.HasRows Then
ReDim Preserve entities(cnt)
While rdr.Read()
[Code].....
I've tried for loop over the controls in panel1 to dispose of any still on there in both the page_load and page_init subs, but neither had an effect. I don't know if it might have something to do with controls having the same IDs after the postback.
I have a page that contains some dynamically created controls (TextBox and DropDownList). When a postback occurs, the TextBoxes keep their values, but the DropDownLists lose their ListItems. This is quite confusing, since the page level DropDownList also keeps its ListItems.
<%@ Page Language="VB"%>
<script runat="server">
Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs)
[Code].....
How do you get a specific nested control of dynamically created controls (i.e. the child of a dynamic control)? The FindControl() method does not work because it only deals with TopLevel dynamic controls I believe.
View 2 RepliesI want to create labels in my page dynamicly, for example the user will choose in a textbox the number of labels, and I will display the number of this label with .text = "XYZ".
View 3 RepliesI am working on a program, obviously, and was wondering if there was a way to dynamically alter whether or not the program started with Windows. If there is a way that doesn't delve to heavily into API that would be wonderful.
View 1 RepliesHow to define ,dynamically initialize and print 3D array in vb.net ?
I have this code that return a 3d array and I have errors telling me the there is an argument out of range [code]...
I'm trying to generate a query dynamically using textbox values from my Bookings form to update only those values that were entered by the user.[code]...
View 1 RepliesI have 50 checkboxes that I need to write onto an aspx page. Each checkbox comes with 3 textboxes.[code]...
Now this shall go for all 50 states, depending on which states the person wishes to donate. In each state's row shall be a checkbox. So initially the page shall have value 0.00 in donation and new donation checkboxes, but all 50 states shall be visible. When the person puts a value of donation in certain state, that state shall get "checked" value and the donation, after submitting. On reloading, the value shall be populated automatically and checkbox checked automatically.
How do I make these 50 checkboxes in VB.NET?
I've created a form with a PictureBox on it and would like to dynamically create another PictureBox on the form while the program runs (to the left of the static one). I've written this code:
Dim temp As PictureBox
temp = New PictureBox
temp.Image = StaticPictureBox.Image
temp.Visible = True
[code]....
When I run this code I can detect that the temp PictureBox does get created. However, it is not rendered onto the form. It seems like it's there but is invisible.
I have this code.
Code:
Public Class Form1
Dim NPB As Button
Dim x As Integer
[code]....
As you can see, when I open a program from my menu, a new button will be created with text similar to this, "C:Program ". The button it self will not do anything. How can I create the method at the same time the button it is for is created? Also how can I change the text do that it gives me, for example, CCleaner.exe instead of the whole target path?
I'm writing an intranet ASP.NET page using VB.NET. I've run into a particularly nasty problem dealing with handling file uploads. I'll do my best to explain the problem, and perhaps someone can help.
My problem is almost a duplicate of this one, or this one, except (other than the filename) I don't care about sending the file to the server until the other data has been reviewed. here's the situation:
Joe Q. Dataentry inputs some data into several fields. The first 3 are drop down, and when he changes the selection, a postback event is fired that queries a database for valid entries for the other drop down selections. After selecting the values, he inputs some other data, chooses a file to accompany the data and clicks the "Update" button. When he hits the button, it fires a postback event that sends the current data to the server to be validated. The data will create a change in the database, so he is presented with a view of the current state, and what it will look like when his changes are made. He can now either confirm or cancel the operation for whatever reason.
Part of the data he will see involves the extension of the file which may be a PDF, or could also be some image file or other document.
Now here's where my problem is - on each postback event, the fileupload dialog is cleared. I was getting around it by creating a temporary file on the first postback and then renaming if he clicks OK or deleting on Cancel... but I need to do a variety of things, based on the previous state of data and the filename. I've tried to keep some session variables to retain the filename, and that works OK for just renaming the file, but for what I need to do it gets unwieldy.
What I want to do is be able to have the postback event to present the changes, and then when the user clicks "OK", submit the file. Is there any possible way to do that?
One of my thoughts was to do some of the validation client-side (I'm already re-validating server side so I'm not too worried about data security there), but I don't know how I could get the information from the database query. It appears that what I want to do is prevent a certain button from firing a full postback. Is there any way to do that?I have an update panel on the page already - is there any way for the button to only post what's in the update panel?
I have two listitems and the postback and run a function.
[Code]....
I have the Menu Control in Visual Studio 2010 is set up horizontal in my Master page but on same pages when the page loads and on postback with datasources that take a few seconds to return data the menu spreads vertically down the page. How can I fix this problem?
View 1 RepliesI've got a handful of dynamic controls populating an ASP page, with VB.NET in the back-end.What I need is when the user changes the .TEXT value of a textbox and the page posts back, the .TEXT value of a Table Cell changes to reflect that change (it multiplies the value of the textbox by the value of another cell).But a Table Cell can't be set to AutoPostBack, and I can't for the life of me figure out how to programmatically refresh the page (force a postback) in the TextChanged event for the textbox.
View 1 RepliesI have a page with three radio buttons and a calendar usercontrol. The radio buttons have autopostback and depending on which one you click it should change the calendar availabilities based on the selected index.The problem is that the page load of the calendar is executing first before the selected index change (where I am setting the needed id).
View 1 RepliesI have a label's value that is posted back from a previous page and I want to use this label to do a simple calculation in the current page, but when I do the calculation the page (refreshed) the value of this label and automatically deleted the value (Since there would be no value in postback when it refreshed).
Here is the code behind file:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Label2.Text = Request.Form("Hidden1")
End Sub
and here where I want to use the label
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Stotal As String
Stotal = Val(Label2.Text) * 10
Label3.Text = Stotal
End Sub
How can I save the value in the page via view state or any other method?
A user logs in by inserting their user id and password.If they don't have an email address assigned to their login details they are asked to submit one before they can continue.They then continue to the home page in a logged in state.The trouble I'm having is that the user id and password are not retained when they submit their email address so the login fails.
Here's the code...
Dim userid as String
Dim password as String
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
[code]....
I created an item user_control that has a textbox, button, etc. which will intentionally collect the total quantity of items the user wants.
I dynamically create a few intances of user_control on page_load. If you click the add button for the item quantity it will add to a session variable. however when the user enters a different quantity in the textbox and clicks the add button the total is of the original value of the textbox.
How to get the value the the user has typed in to the textbox to add to total???
I've create a stripped down example below: [UserControl] [Page] [CodeBehind]
UserControl...
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="BomItem.ascx.vb" Inherits="DynamicUserControl.BomItem" %>
<style type="text/css">
[Code].....
How can I make dropdownlist no postback - I have a dropdownlist which I put a code in selected indexchanged - basically for every indexchanged the code will connect to sql and get values then populate textboxes with values.
Here is my code
<asp:DropDownList ID="ddlSalesOrg" runat="server" Style="width: 200px;"
AutoPostBack="true" />
Obviously when I remove the autopostback="true" - then indexchanged will not function as expected.
I have a div which needs to be hidden when the page first loads. If the user then clicks the "btnShowDiv" button, it should then become visible.The problem I have is that, once it has become visible I need it to stay visible. At the moment, whenever I click on an asp button the div reloads and becomes hidden again.
<DIV id="myDiv" style="display:none;">
<label>some text</label>
</DIV>[code].....
I have a checkbox in datalist, after the button is clicked(postback) the value of checkbox is cleared. For example, if the checkbox in datalist is checked, when the button is clicked the checkbox appears unchecked when getting it's value
View 2 RepliesI would like to know if i had two columns from a database called SellerID and Product letter in a table called product, and on a new form i want to be able to combine the columns i.e if the user enters the sellerId and product ID e.g 1A in a SellerProductID in a new table on a new for i want the program to do a postback and have the Description Field be populated with the data from the Products ID Therefore the SellerID + Product letter = SellerProductID and it should select the description in the description field.
View 2 RepliesI'm creating a Website and I noticed that when the page reloads due to a postback, My variables all are unloaded so I have a Null variable,
For Example I'd Declare a String With an initial value of "" then later in the code set it to "Some Value", when a button is clicked to cause a postback, this value then becomes "" again
Is there some way to preserve variable so their values remain the same after a postback
When the page is loaded the following code is invoke
Page load
Dim products As New LinkButton
Products.Text = "Products"
testPanel.Controls.Add(products)
AddHandler products.Click, AddressOf getProducts
[Code] ......
What I want to achieve when the page load I link is create Products when i click on products link it invoke an event handler call getProducts. Getproducts will loop in the database to fetch all record then it will create a link for each product name when i click on the product name it should invoke another event. My problem is how can I re add control after every postback.
I have a child aspx page in an iFrame. There are a few textboxes, which are populated in the page load event.
There is also a LinkButton which the user clicks when s/he is finished editing the fields. There are some javascript functions and other things going on, so a full postback (ie: asp button) is out of the question.
Problem is, I need to reference the textboxes NEW values (user changes) after the linkbutton is clicked.
After playing with the interface a bit further, I realized the Page_Load event was firing as soon as the LinkButton was clicked. Of course this is where the data is initially loaded, so any changes the user made is immediately written over. Current plan of attack is to create an IsLoaded cookie value and check if true before the mentioned code executes.
I have a button which calls stored procedure and binds gridview.I found a code on stackoverflow for top alert bar like this:
[Code]...
on my aspx page I have 4 dropdowns and a gridview.Each dropdown is populated based on previous dropdown selection (each of the dropdowns are autopostback=true)and the grid suppose to display data when all dropdowns are selected. The bad thing is that the grid gets repopulated whenever any of the dropdown selected.So when a user select first dropdown, the grid displays data, then it repopulated again on second dropdown postback and so on...I would like to have a user to select all values in dropdowns and after that on a click of a button show the datagrid.How do I do that?
View 2 RepliesI'm having some problems in persisting the viewstate on postback for a Control (vb.net)
here's some code i've put in my control[code]...
I'm setting EnableViewState = "true" everywhere i can, but still no result. Do i really need to set those properties here. (ViewStateMode and EnableViewState) If not, where should i handle this and what is the difference between those properties?
I have a datalist control that is not retaining it values during postback when the control causing the postback is outside of the update panel that the Datalist resides in. I have verified that viewstate is on for that usercontrol as well as all its parent controls. My basic situation is that I have a Datalist that contains a user control on a page. When the user selects several rows in a grid and presses a button, a datatable is filled on the backend and assigned to the Datalist which has its item template set to the UserControl.
On ItemDataBound I set specific properties in the control which customize the messages on that control to the specific item. This is then popped up using the AJAX Control Toolkit Modal Popup[ Extender. When the user presses Save the whole page posts back. Data is collected from the user controls and saved to the DB and the popup disappears. The issue I am currently having is that the DataList has 0 items when the save button is pressed instead of the appropriate number. THis issue just started appearing after we upgraded from .NET 2.0 to .NET 3.5.