I am using an asp.net autopostback enabled dropdown list. Here i want to restrict the autopostback property fot the value "Select" in the ddl. I have used javascript for this purpose. but not working.My code look like this.
[Code]....
I'm using ASP.NET, and in a Wizard control I have radio buttons where if "Yes" is selected, a panel is shown, but if "No" is selected, the panel is hidden. I have MaintainScrollPositionOnPostBack set to True, though the ActiveStepChanged event changes it to False so that when you click Next to see the next Wizard step, it will start at the top of the page. The problem is, after clicking Next, the first time you click on a radio button it jumps to the top of the page (the page retains its position any time you click a radio button after the first time). How do I stop it from jumping the first time?
View 2 RepliesI have an autopostback dropdown with a requiredfieldvalidator associated with it. If I click the submit button on the page without selecting an item from the dropdown, the validator will fire as expected. Then, if I select an item from the dropdown, the validator message goes away, but the postback does not occur. The postback only works if the validator has not fired first.Is this by design? How can I work around this so that the dropdown still does a postback when selecting an item after validator occurs?
View 13 RepliesI am getting the following error as 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. when an invalid value is passed in dropdown with autopostback=true. What should I do. I want the solution with "EventValidation=true" and "ValidateRequest=true" in the Page directives. Also without any Custom Error Pages Enabled in web.config file i.e Custom Error Pages are off in web.config file.
View 3 RepliesAm using DropDown list. Whenever Autopostback is true it selecting first value of dropdown list...
View 1 RepliesI have a grid which is getting bound from a dataset and the autogeneratecolumns prperty is set to true.
Now i have a menu control. And when i select a particular cell, I want to headertext of the cell selected should appear as the text of the menu item.
But because autogeneratecolumns = true, so i gridview.columns.count=0. So not able to get the header text.
The code goes as follows.
[Code]....
The subject is explanatory, but here are some details:
I want to update a repeater when SelectedIndex value changes for a dropdown list. The problem is Nothing happens.
My aspx page is present in a nested master page. and neither autopostback works nor update panel. i have set the AsyncPostBack trigger on SelectedIndexChange event.
Please let me know what am i doing wrong or what am i missing.
PS: I have never worked on ajax before so I might have overlooked something.
I want to show a confirm dialog when the user selects an item in a DropDownList. If the user presses "Cancel", I want to stop the postback. Here is the function I add to the onchange event:
function imitateConfirmUnload(event) {
if (window.onbeforeunload = null)
return true;
return confirm("Are you sure you want to navigate away from this page?
You have unsaved changes
Press OK to continue or Cancel to stay on the current page.");
}
And this is the relevant bit of code in my startup script to add the handler to the event:
[code]...
The problem is that the postback occurs even if the user selects "Cancel". If I move the handler on to the click event, it works. But it feels clunky to me.
Edit
Correction: it doesn't work onclick, because the dialog prevents selection, so when the user selects OK, no change has taken place, and no postback when you want it!
Edit 2
The DropDownList is inside an UpdatePanel so that may affect behavior.
I have the following code:
.aspx
<asp:DropDownList ID="ddlCountries" AutoPostBack="true" runat="server">
</asp:DropDownList>
[code]...
I am dealing with dynamic fields in a for loop and now I need to retrieve the values that are being typed in the dynamic fields, any idea how can I do that? 2)also when I click the submit button, upon postback, the dynamic fields have gone missing, have been trying to slove that, but i did not, anyone knows how to deal with this? kinda urgent :x
3) and How do you compare the 2 dynamic fields? For eg: Im comparing the tbSch[i] to tbSch[i], so that the dates cannot be the same, am using a compare validator, but it throws me error that im comparing the same fields :) even though i change to ("tbSch" + i) for both, sorry Will provide my code snippet as follow :D tbNum is a textbox where user enter numbers and click generate
protected void btnGen_Click(object sender, EventArgs e)
{
for (int i = 0; i < Convert.ToInt32(tbNum.Text); i++)
{
// label and textbox needed
Label lblSch = new Label();
TextBox tbSch = new TextBox();
Label lblWsGrp = new Label();
DropDownList ddlWsGrp = new DropDownList();
CompareValidator cvSame = new CompareValidator();
cvSame.ID = "cvSame" + i;
cvSame.ErrorMessage = "Date cannot be the same";
cvSame.Operator = ValidationCompareOperator.NotEqual;
cvSame.Type = ValidationDataType.Date;
cvSame.Display = ValidatorDisplay.Dynamic;
cvSame.EnableViewState = true;
cvSame.ControlToValidate = (tbSch.ID);<<<<< what should be the value in here?
cvSame.ControlToCompare = (tbSch.ID);<<<<<<<<<< and here?
//schdule date
lblSch.ID = "lblSch" + i;
lblSch.Text = "Session Date : ";
lblSch.EnableViewState = true;
tbSch.ID = "tbSch" + i;
tbSch.Width = 210;
tbSch.Height = 27;
tbSch.EnableViewState = true;
//workshop grp
lblWsGrp.ID = "lblwsgrp" + i;
lblWsGrp.Text = "Workshop Group : ";
lblWsGrp.EnableViewState = true;
ddlWsGrp.ID = "ddlWsGrp" + i;
ddlWsGrp.Height = 27;
ddlWsGrp.Width = 210;
ddlWsGrp.EnableViewState = true;
ddlWsGrp.Items.Add("1");
ddlWsGrp.Items.Add("2");
//table to store data
TableRow trow = new TableRow();
TableRow trow2 = new TableRow();
//row1
TableCell tc1 = new TableCell();
TableCell tc2 = new TableCell();
TableCell tc3 = new TableCell();
TableCell tc4 = new TableCell();
//row2
TableCell tc5 = new TableCell();
TableCell tc6 = new TableCell();
TableCell tc7 = new TableCell();
TableCell tc8 = new TableCell();
TableCelltc9 = new TableCell();
tc1.Controls.Add(lblSch);
tc2.Controls.Add(tbSch);
tc3.Controls.Add(lblWsGrp);
tc4.Controls.Add(ddlWsGrp);
tc5.Controls.Add(space);
tc6.Controls.Add(CeSess);
tc7.Controls.Add(space);
tc8.Controls.Add(space);
tc9.Controls.Add(cvSame)
trow.Cells.Add(tc1);
trow.Cells.Add(tc2);
trow.Cells.Add(tc3);
trow.Cells.Add(tc4);
trow2.Cells.Add(tc5);
trow2.Cells.Add(tc6);
trow2.Cells.Add(tc7);
trow2.Cells.Add(tc8);
trow2.Cells.Add(t9);
this.table3.Rows.Add(trow);
this.table3.Rows.Add(trow2);
}
}
![<asp:RadioButtonList ID="RdoBtnHasNotified" runat="server" RepeatDirection="Horizontal" AutoPostBack="True" OnSelectedIndexChanged="RdoBtnHasNotified_SelectedIndexChanged">
<asp:ListItem Value="1">Yes</asp:ListItem>
[code]...
I have 2 textboxes and a submit button inside a .net composite server control. I tried to only postback when submit button is clicked. I set autopostback = false for both textboxes. But either one still trigger submit button's onclick event by hitting "Enter" inside textbox. How can I stop postback by enter key?
View 2 RepliesI have a Cascading drop down list that is working fine to load the correct lists however I would like to have the last one initiate a query and display a datagrid on the same page containing the results of the query. Without Ajax involved this seems rather easy by using autopostback on the drop downs. If I could do it through Ajax that would be great but I can settle with having the page to reload to display the data. Right now I'm not sure how to do either. I enabled autopostback on the last drop down and wrote a method for it but I get an error at runtime saying:
Invalid postback or callback argument
I want to stop postback if a certain value from a ddl is selected.
I've used VB to create a page whereby if a certain value from a ddl is selected then a hidden panel becomes visible. The problem is the likely answer to a majority of my ddl's is 'No' (or a no type response), however, even though the panel visibility remains false upon selecting No a postback still occurrs, the page refreshes and moves back to the top. I suppose this is a question with 2 possible solutions (or 2 questions rather)
1: Is there anyway of setting postback to false if selected value = No? A typical example of how my code appears is below
[Code]....
(i've used the value '1' to represenet Yes)
2: Is there a way of setting the page position after postback? As you can see in my code above i've set the focus on the next control (being a Radio Button) but i mean, is there an actual way of defining where the scroll bar is set?
i duno why, when i put a autopostback in my drop downlist, after the postback, my content HTML editor and the flash button all disappear.
i have put the enable view state = true. but it still happen.
I am an asp.net newbie and encountered problem with postback. I have created a web form and put some web controls and set their AutoPostBack property to True.
Some of the controls are listbox, checkbox. However, the SelectedIndexChanged and OnCheckChanged do not fire automatically when an item is selected from the listbox for example or when the checkbox is checked. I noticed that the commands I put in the SelectedIndexChanged and OnCheckChanged is only fired when a button is clicked.
e.g. The code below that sets the text of a label is being fired only when a button is clicked even if the autopostback property of the listbox is set to TRUE.
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
ListItem myItem = ListBox1.SelectedItem;
Label1.Text = myItem.Text;
}
Again, I would like the Label's text to change when an item is selected from the listbox and not only when a button is clicked.
What else could I be missing to make autopostback work?
I have a gridview with checkboxes going down the side for each item. Some are enabled and others are not. At the top of the page is a checkbox which when checked will make all the checkboxes on the side enabled. THis is not working and I have tried 2 variations. What am I doing wrong?
[Code]....
I have 5 textboxes in aspx page, and their AutoPostBack property is True. When I write something to first textbox and press tab key to write something to second textbox, the second textbox don't be focused. I have to select second textbox with mouse to write something it. I want to focus the second textbox by pressing tab key after write something to first textbox. HOW Can I do this?
View 6 RepliesWhen a user clicks a control that has autopostback=true, the screen refreshes and scrolls back to the top of the page. Is there a way to avoid this and have the page stay in the position it's in?
View 4 RepliesIs there a way to have a textbox autopostback when the 5th character is entered into the textbox?
I have a zipcode textbox that I would like to fire an autopostback as soon as the 5th character is entered. Currently I have it so it will fire when tabbed out of or when the next textbox is clicked in but it would save one step for the customer if it fires on the fifth character.
[Code]....
I have a webform with multiple input textboxes. each box is used in computing somethings, and i am doing these calculations within the TextChanged event for each textbox...this way after the user enters each entry, all calculations requiring that data is performed. I have also set EnableViewState="true" and AutoPostBack="true" cause I am trying to have the textbox keep their data displaying on AutoPostBack. The form is not behaving the way I want it to...right now, if a user inputs data in one field and switches focus to the next, the previous box losses it's data. Is there a way i can get this behaving the right way? I basically just want all the controls to keep their data on AutoPostback.
View 6 RepliesWhat is autopostback? Please explain me with a small example with client/Server.
View 8 RepliesI have a checkbox with autopostback property. I just want to ask because everytime I check the box It appears on the upper part of the page. How can I make it without changing its location when I check the box.
View 5 RepliesI have a checkboxlist with autopostback set to true, the checkbox list inside a panel and together they are inside an update panel.
when I first check one item everything is fine but when I try to check another one a javascrip error fires.
"Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Specified argument was out of the range of valid values. "
this is my code:
[Code]....
I have a nut for a manager who changed my form and added _top so that I could redirect a response to a parent window, anyway, I have two .net forms and now he tells me I can't do any posting back on my child window. I have lots of .Net event callbacks that use autopostback on this child window. He told me he believes I can do all the necessary event code through his Javascript client-side scripting that he loves so dearly. I don't think he knows .NET very well even though he acts like he does. the microsoft server coding world and without replacing every object in my child window (there are many) with html and resorting to an html page (God help me Bill Gates I'm coming to get you) is there anyway I can have my events (onselectedindexchanged onclick ... ie) to call javascript functions without an autopostback on any of my controls ?
View 7 Replies
