Forms Data Controls :: Gridview Doing Post Back And Loosing Settings
Feb 22, 2011
I have three identical procedures that are all used to open the contents of a GridView into Excel. One was working fine but the other two were getting a 'RegisterForEventValidation can only be called during Render();' error when attempting to run the form.RenderControl(html) command. The only difference I saw was that the one that was working had the allowsorting value set to 'False' where the other two were set to 'True'. I set the other two to false and they worked. So what is going on here? Why would this cause the error; is the GridView somehow doing a post back and loosing settings when this value is set?
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Mar 29, 2011
I'm using Wizard control to collect some information. I have Repeater control in my Wizard control. when client inputs information and clicks next button he gets to next WizardStep, thou from next step when client clicks previous button and navigates to previous step Repeater control's input fields are empty. How can I store client input so when he will navigate back he could see previously added information. I don't want to use any client or server side session management techniques, because I think viewstate is enough. I think my problem is I don't bind Repeater control in a right place, besides, all the controls inside my Repeater control are loading dynamically.
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Oct 19, 2010
I have a gridview inside update pannel and i enabled sorting for the grid if i click to sort a column it does postback and then the grid doesn't show in anather way i have item template column inside of the grid and i am using a button to call a function ,if i click on this button it do the function but the grid doesn t show after the post back
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Nov 11, 2010
I have a GridView control that has an ItemTemplate that contains an HTML radio button. In my code behind I am querying a database, retrieving a column of values, and then binding the list to the GridView. My problem is that the radio button that I select is not being persisted on post back. I have tried using an ASP RadioButton rather than an HTML control, but when I do that all of the radio button can be selected at the same time (i.e. like check boxes). how to persist the radio button that is selected in this scenario?
[Code]....
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Apr 15, 2010
I'm having a weird problem with one of my .net windows applications. I store a number of settings in the application settings (User Scope) but from time to time the settings just seem to dissapear when it's run on the server.
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Nov 17, 2010
If the grid column is clicked to sort i dont want to retireve data agian, i can get it from viewstate, but i dont know if that triggered the post back or if the ImageButton on the page triggered it
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May 7, 2015
I have 3 textboxes , 1 dropdown , 1 Button and 1 gridview .
Textboxes ID are :ACode , ADesc , ASeq
DropDown ID is :CPhase
Button ID is :AddRowBTN
GridView ID is :PhasesTempGrid
Now whats the story is ?After adding some data into textboxes , when a user clicks ADDRow BTN , that data gets saved into datatable , then that datatable gets binded to gridview and it shows my textboxes data in it .
What i want to achieve ?In my gridview i am use templateField and inside that template field there are textboxes ( Let the users edit the row without clicking any button ) .
Take an example of dummy data and problem persisting in there :for e.g i put some data in textboxes :ACode = "ABCD"ADesc = "EFGH"ASeq = "HIJK"Then i click Add BTN , it saves the data in datatable and show in gridview , now if i do this in gridview :ACode = "Edited ABCD"ADesc = "Edited EFGH too"ASeq = "WoW There"Then i click Add BTN , it removes the edited record in gridview and shows original data which had came earlier from textboxes :ACode = "ABCD"ADesc = "EFGH"ASeq = "HIJK"I don't want that to be done ... Simple is that user can enter data from textboxes , click the btn to submit into grid then he can edit the data like he want ... data must not get flashed , here's my coding i have done so far :
public void AddNewData()
{
var dt = new DataTable();
if (ViewState["myDatatable"] != null)
{
dt = (DataTable) ViewState["myDatatable"];
}
[CODE]...
here i havent added dropdown combo in gridview but you can do it so that it will save my time (Bind it just the way PhaseDropDown have bind)...
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Mar 5, 2010
Can any one let me know "How to load the dynamcially added HTML Controls(Controls added using javascript) during the postbacks without loosing their values?
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Nov 30, 2010
I have four textbox and a button in my page. After filling the textbox. When the user click save button. A loading image should be displayed. User should not feel that the page is postback to the server,Some thing like in facebook loading image.
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Oct 18, 2010
I'll try to specify my problem as simple as possible! I have a problem comunicating between 2 pages; Products.aspx and ProductDetail.aspx. On Products.aspx i have about 15 DDL's on the left side (all set to autopostback), and 1 ListView ond the right side. Results in my ListView control are based on selcted items from DLL's on the left. Every single result in Products.aspx has a dynamical hyperlink to the ProductDetail.aspx. Now when I click on specific product in ListView I'm redirected to ProductDetail.aspx page, and everything works fine! If I click on the Back button in IE or FF it works also fine because it returns me to the previous Products.aspx page and all my results based on selected items in DDL's are still there!
The problem comes when causing some more autopostback's in ProductDetail.aspx page, because every autopostback is counted as a new page request and therefore i have to click Back button in IE or FF for more then 1 time to come back to the previous Products.aspx page.
I tried to implement code BELOW in ProductDetail.aspx.vb but it does not completly fulfill my expectations, becase all my searching criteria are lost when returned to the previous page (Products.aspx)
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
ViewState("ReferrerUrl") = Request.UrlReferrer.ToString
End If
End Sub
Protected Sub BACK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BACK.Click
Response.Redirect(ViewState("ReferrerUrl").ToString)
End Sub
Does anybody knows any other solution how to come Back to previous page with only ONE CLICK without loosing searching criteria?
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Apr 5, 2010
<asp:DataList
id="dlstImagesDe"
DataSourceID="srcImagesDe"
[code]...
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Jul 14, 2010
Being new to ASP.NET I have run into trouble building my own Whack-a-mole program. I think my problem comes from using Buttons, which by themselves send post backs to the server, making the software unusable. The looks are in place, making new buttons show up in the grid, in different places by random. However, when a button is pushed - the score doesn't change (which I feel is strange).
Not so strange is that the Button doesn't work since it sends post back to the server - reloading the UpdatePanel. I think I should use a different controller like the CheckBox and style it hard using CSS (which isn't a problem). Is this the correct way to go, or should I make use of JavaScript AJAX instead?
Note to self: This technique shouldn't be used in a public application since it put too much unwanted pressure on the web server.
[code]...
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Feb 14, 2010
I have 3 drop downs in a details view (populated from a gridview) during insert mode.
Dropdown 1
Dropdown 2 --> Based on drop down one
Dropdown 3 --> Based on drop down two
I am curious of how to handle the autopostback to update 2 and 3 since they are part of the detailsview, there isn't a selected_index_changed event.
I am ok with adding items to them on page load, just not for cascading of them...
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Apr 19, 2010
I have developed an asp.net application ... I have a textbox where user will enter is name ... I need to check if the name is already exist in the database table column when ever user enter their name with out post back . If user exist mean it should show a msg user already exist .....
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Mar 16, 2010
I have two tables. 1st contain topic and its id. 2nd contain topic name,its category and category list.
I want to display using asp .net datalist and vb script like the following
topic 1
Category 1
categorylist 1 of category 1
categorylist 2 of category 1
Category 2
categorylist 1 of category 2
categorylist 2 of category 2
topic 2
Category 1
categorylist 1 of category 1
categorylist 2 of category 1
Category 2
categorylist 1 of category 2
categorylist 2 of category 2
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Jun 28, 2010
I need to process surveys. I have modelled them in SQLServer, just need to generate the forms to input it.I have nested SqlDataSource/DataLists. The outer gets the questions and the inner gets the various options as a plain HTML radio buttons. I can't use ASP.NET radio buttons because of a bug with them inside itemtemplates not mutually exclusive http://support.microsoft.com/default.aspx?scid=kb;en-us;316495Anyway, so now I need to know the which radio buttons were selected so I can insert the values in the database. What is the best way of doing it?
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Oct 4, 2010
I am using asp.net/c# application. In my application, I have a gridview.<asp:GridView id ="gv_QuestionList" runat="server"> </asp:GridView>In Code Behind, I created dynamic textboxes and DropDownLists on RowDataBound.
[Code]....
I have a Save button out side the gridview which stores all the row values into database. when I click the "Save" button, I lost dyanamically ceated controls like textbox,dropdown and values (on postback).How can i get all the dynamically created controls and values after the post back?
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Mar 31, 2010
i am creating gridview with dynamic template, and the grid is disappear while postback. my code is below.
i am using GridViewTemplate class to generate Templates
Public Class GridViewTemplate
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Aug 3, 2010
I have a text box inside a update panel. With the onTextChanged events, I have a post back set in "True" to show the customer Name and email when I type in the customer ID in the text box. I want to have it show when we leave or Tab out of the text box. Now is working , but only afte I click the submit button. Does anyone know how to code the following in order to make it work right away when we Tab out of the text box.
protected void txtBDID_TextChanged(object sender,
EventArgs e)
{
}
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Feb 24, 2010
I have a css file which is external registered in Master Page which contents the following code :
.Item:hover
{
background-color: #def2fd;
font-weight: bold;
cursor:pointer;
}
The Item is applied for GridViewRow. This GridView is in a UpdatePanel, when I click a button to do a Ajax Post Back the CSS applied for the GridViewRow is useless (IE 6 only).
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Mar 31, 2010
I have a gridview bound to a sqldatasource with editing enabled. If I click Edit, then either Cancel or Update, the update or cancel occurs and the Edit button reappears. However, I cannot then click the browser's back button without having the Update and Cancel buttons reappear. A second click of the back button takes me to a state where the Edit button shows again, *then* another back button click will take me to the referring page (the one before the one with the gridview on it.) IOW, it looks like the postbacks are cached. How can I prevent this and have the back button go straight to the referring page?
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Feb 22, 2011
Using Vb.Net 2003 Asp.Net 1.1
I have a dynamic data bound drop down list, when the user selects thier selected item I have to use the autopostback feature.
Problem is: when the page comes back it is at the top of the page not where i have the control.
I don't really need it to focus back on the dropdownlist but to scroll to it, I want to do it in the code behind.
Any "New" ways to do it, I mean new as in code from like 2010 instead of old code from the early days.
I really don't want to use Page.Register new Script...... code if I can avoid it.
What would be cool is a ScrollToControl() Function for my code behind that worked but didn't register script.
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Jan 25, 2011
I don't know if its possible in ASP.NET (I'm assuming it is) but I've seen other websites where they have pager settings of grids that are actually linked to the first letter or first couple of letters of a certain field within the gridview. So.. if you have 1000 names... instead of guessing which page the name you're looking for is on, you would just click on "Sa" which would take you automatically to the page that "Sanders" was on. Can anybody tell me how to do that?
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Feb 9, 2011
I have a very odd and disconcerning problem. Just recently a page where I have 1 textbox and a buttoon has ceased to work.
When I look at the post coming into the PageLoad, the pageType is "POST", but the Page.IsPostBack is false!! and the textbox (which had content) is empty.
I have stripped all AJAX script out, so I have a very vanilla page (in a master page) being served.
The pages is
[Code]....
[Code]....
The page is "POST", but isPostback is false[Code]....
[Code]....
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Jul 15, 2010
I searched google and found asynchronise post back trigger is used if we want update panel to post back on some event of control if it is out side the update panel. Than what is purpose of post back trigger ?
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