Asp.net - Textbox Values Disappear On Postback?
May 11, 2012
I have an asp.net page with a button that adds an additional row to a gridview for input to the database. The gridview consists of 3 textboxes(template fields), when I add a row the information already entered somehow disappears on the postback. I want the button to add additional rows without disspelling the data in the other rows, until I hit the submit button. Here's my code
Private Sub AddNewRowToGrid()
Dim rowIndex As Integer = 0
If ViewState("CurrentTable") IsNot Nothing Then
[Code].....
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Nov 9, 2011
Im sure this is a very simple and easy to answer question but I've been looking at this too long and being new to ASP I cant seem to find a solution that works.
I have an ASP calendar extender, I click it and the calendar displays as expected, the selected date appears in the textbox, but when the page then posts back I cant get the selected date value from either the textbox.text or the calendarextender.selecteddate properties, I tested this by trying to assign these values to a string variable in the page_load event.
[Code]...
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Jun 10, 2010
Empty values in byte array at the end of one packet are replaced by beginning values of the next packet sent in TCP connection. How may I avoid this?
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Aug 16, 2011
I have a MainForm which contain SecondaryForm as a control of the MainForm.SecondaryForm contains DataGridView which loads data from sql server and I add a collumn named SUM that SUMs all the values of the same row. This is provided within the LOAD event of the SecondaryForm.When SecondaryForm.Load events finishes, the program goes back to MainForm right after the line "SecondaryForm.Show" and here the values of the column SUM disappear.When i write those values runtime, they never disappear.
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Feb 29, 2012
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
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May 20, 2009
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.
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Jun 11, 2012
I'm running into a little problem with a gridview and a dropdownlist. I can get the dropdownlist to load initially, but when it autopostback's it returns with no value. I am populating the dropdownlist in the RowEditing sub. I'm guessing that I must somehow rebind in the RowDataBound sub, but don't know how to go about it. If I try to find the control's SelectedValue I end up with nothing.
VB Code
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
[Code].....
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Mar 24, 2012
I am using asp.net.I have taken one Hidden value and assigning value to that hidden variable in Java-script.
aspx: <input type="hidden" runat="server" id="hdnProductionIds" value="0" name="hdnProductionIds" />
JS:document.getElementById("ctl00_ContentPlaceHolder1_hdnProductionIds").value = "123";
I want to use that hidden value in server side coding(vb.net). But while do-post back, hidden variable value becomes Zero (default value)
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Mar 3, 2011
When I Webbrowser1.Navigate with my textbox the text inside of the textbox disappears.
WebBrowser1.Navigate(TextBox1.Text)
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Apr 5, 2011
I have textbox and button1 on my asp.net webform ...I want when i click button1 then the text on the textbox will remain the same as it is ... it will not disappear .... on button click event
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Jul 15, 2011
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.
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Nov 27, 2010
I have unlimited asp.net checkboxes to my webpage .How to insert checkbox checked value to textbox without autopostback.I i check checkbox1 and checkbox2 then in textbox it appear as 1,2 ...and after when i uncheck checkbox1 then in textbox the value would be 2.and if i uncheck checkbox1 and checkbox2 then value in textbox is blank
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Jan 21, 2011
I have a drop down menu, and based on which item is selected, I call a web service and then dynamically create some text boxes.The first time I drop down the menu and select an item, it works perfectly, and the text boxes are created and populated dynamically. However, the next time I drop down the menu (after the first postback), and select something different..fter the second postback, the original values remain in the textboxes.
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May 25, 2009
I'm using a pattern of buttons verticle, & horizonal, to produce a 2 dimensional matrix (6 deep, 25 wide .) The sequence is repeating, but offset from horizonal line to line. the values are 1 thru 12. there are corresponding files in the "My.resources." file carrying names related to the buttons. If the "my. Resources" filename is say.., "1,3,4,6,8,9,11,12 " & the buttons pushed have produduced the string "1","4","6" then the prestated file carries all these values, and therefore should be selected. All integers of the textbox list must be present in a "my.resources" file to show the file. There will be multiple files in the resource file that will fit. (My ultimate intention is to show all files that fit, somehow. I'll have to, eventually. I'm still writing this, and changing it constantly. )the question is, "How do I get the computer to link the textbox integers to the resources files? Textbox = "1", "4", "6" to My.Resources.1,3,4,6,8,9,11,12
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Nov 15, 2011
I'm creating a Multiplayer LAN game in VB 2008 here is what I wanted to do I created a textbox named txtbuttons.text. If I inputed a value, for example 23856 in the textbox.The Values will be distributed in different textboxes.
example
Value of txtbutton.text = 23856
2 will be distributed to txtAns.text
3 will be distributed to txtAns2.text
8 will be distributed to txtAns3.text
5 will be distributed to txtAns4.text
6 will be distributed to txtAns5.text
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Mar 15, 2012
I'm creating a Multiplayer LAN game in VB 2008 here is what I wanted to do I created a textbox named txtbuttons.text. If I inputed a value, for example 23856 in the textbox.The Values will be distributed in different textboxes.
example
Value of txtbutton.text = 23856
2 will be distributed to txtAns.text
3 will be distributed to txtAns2.text
[code]....
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Jun 22, 2010
I have created a textbox array based on the number of 'Channels' on another form. This number dictates how many textboxes (and other controls) to add to my new form.
I expect the user to type in their 'type' of channel into each textbox.
The thing I am having problems with is once the user types in the information, how do I access the data and store it for a future form?
Here is my code (once again excuse my programming skills):
Public Class Fixture1Setting
Dim labels As New List(Of Label)
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
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Jun 6, 2010
I am using visual basic and when I try to hide Navigation bar, I am not able to, it is disabled. Ok I tried to turned it off going to "all languages", althought I unchecked the setting. It didn't disappear. I restarted visual studio, closed all open classes. It is just visual basic, when I try with c# I can hide and show it.
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Feb 14, 2011
I am storing labels in a collection array called mylabels.now I want to not only remove a label from the array but also from the picturebox it is drawn on.I am trying the following
mylabels.RemoveAt(x)
but although the labels are removed from the array, even on picturebox refresh they donot disappear from picturebox.
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Aug 30, 2011
I have seen this problem before but I haven't seen an answer to the question that applied to my particular case. I have a BackgroundWorker running in my VB form, as well as a progress bar and some labels. I also (if it's important) have a WebBrowser on my form, but it isn't affected by the thread.
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Jun 4, 2009
When I open "My Project" in VB WPF Project, then make changes and save, then character "*" doesn't disappear from tab.
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Sep 3, 2009
I use VB 2008 Professional. Initially, when I'm in debug mode all the windows are visible: The Solution explorer, Server explorer, Auto window, the tool box, etc. Suddenly, whenever I'm in debug mode only the code editor is visible. I have tried opening them from the View and Window Menu but they don't show up until I exit the debug mode.
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Mar 27, 2010
I have 4 different panels, which I want to appear in the SAME spot on the form at different times. Currently, I've just got all four stacked on top of each other in the designer, and I'm toggling their visible properties to show each. This is becoming extremely difficult though, as now I have different buttons in each panel, and the panels keep getting accidentally put inside each other when I move them.
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Apr 6, 2012
I am making a calendar, if I click on a day I want to make a screen disappear a bit like this:
________________________________
|12:00 |
| Mister One, Footmassage |
[Code].....
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Jan 25, 2010
I have splash screen with three buttons.When i run My application after sometime splash screen disappear. Actually what i wanna do when user click button then splash screen will close otherwise not.I don't wanna use timer.
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Jun 10, 2010
I have an add-in that creates a form, adds controls to it, then tries to add some more. But on the second attempt to add controls, they disappear. If I have an error in my code that gets displayed in a message box I can see the new controls behind it. When I click OK they disappear. If I have no error and step through the code, they are there according to properties, although I can't see them because the form will not display while in debug mode. When the program finishes, th controls that were created are gone. Perhaps I am selecting the form to edit wrong.Too bad there isn't any documentation (or any than can be found) that describes how to do this.[code]...
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Aug 22, 2010
I experience very strange behaviour of a windows form written in VB.NET 2005.
The form contais DataGridView with data.
I minimize the form to Windows task bar, then I restore it. The form appears, but the DataGridView and other controls are not displayed. In order recover from this situation, I need to resize the form or maximize it.
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Feb 16, 2010
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Aug 11, 2010
I have an application that uses the editable dropdown combobox (comboboxstyle.dropdown)
But when I run the application, whenever I entered a new value that is not in the list, it disapears when i focus to other cells.
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Jul 31, 2009
My winforms app puts a little icon in the taskbar next to the clock while it's running. how do i make it disappear when i close the program in vb.net?
after the application is closed and i put my mouse over it, it disappears.
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