why when I create a checkbox using HTML.CheckboxFor the values remain after postback where as if I just create a simple HTML checkbox in HTML after postback the value is no longer there?
What is the difference between HTML.Checkbox vs. an HTML checkbox? Why does one retain the values after postback and one does not?
I dynamically create gridview, and in this grid I have template field also
field.HeaderTemplate = New GridViewTemplate(ListItemType.Header, col.ColumnName)
field.ItemTemplate = New GridViewTemplate(ListItemType.Item, col.ColumnName)
grdEmpty.Columns.Add(bfield)
but when enter some value in text box in this template field i lose value on postback. And also on postback I lose all template field and i must re-create this grid.
My goal is: I have button and i want to add new row in this grid, but i want to have old value also.
When we disabled the viewstate in gridview its lose value but this case not true with Textbox control why?
View 1 RepliesI have an external javascript file which I include to my page on the code behind (as seen below).
My problem is, when I my page makes a postback (not partial one), I check the loaded scripts by using FireBug, and I cannot see the javascript file in the list after the post back. I asusmed once it is included to page on the first load, browser will be caching it so that I do not need to re-include it.
What am I doing wrong?
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This is likely a n00b question, but I can't seem to find any info on how to solve it. Here's the scenario:
I have a Textbox and a RadioButtonList in an UpdatePanel, both with AutoPostBack turned on (they need to be, can't turn it off on the text box))
The user enters some text in to the textbox, then clicks one of the Items in the radio button list.
Because the textbox post back is executing, the radio button is losing the value that the user selected.
How can I workaround this?
I'm having 1 or 2 problems with a checkbox.
I have a form that can be either submitted or saved. Within this form there's a number of checkboxes.
I've succesfully achieved this on a textbox (postback) but don't know the syntax for checkboxes
My questions are: how would I open the form with these checkbox's previously checked? In addition to how do I insert the value from a dataSource:
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I have a web flow (asp.net) which has a drop down and a check box.
When the check box is ticked, I need to disable some fields in that form.
When a specific value is selected from the check box, I need to disable other fields.
I specify the checkbox like this:
<%=Html.CheckBox("IsResponseUnavailable", Model.IsResponseUnavailable)%>
And the drop down like this:
<%= Html.MyDropDownList(string.Format("Questions[{0}].Answer", i), (IEnumerable<SelectListItem>)ViewData["Periods"], Model.Questions[i].Answer)%>
Where MyDropDownList is an extension of Html.DropDownList
I've heard about auto-postback - but unsure how to use it
I have the following in an aspx page:
<td colspan="2">
<% DisplayParties(); %>
</td>
In the code behind for the aspx page, i have this (e.g. I build HTML for the checkboxes):
[code]....
Not my proudest moment, but whatever. The problem is that when this page posts back via some event on the page, I never get these tags in the Request.Form collection.
Is this simply how ASP.NET works (e.g. only server-side control post back) or am I missing something simple.
I am working on a datagrid that has a column with checkboxes... the checkboxes should be checked when the page loaded. The problem is that whenever I trigger a postback, all the checkboxes will be unchecked!!
I don't know what is causing this or what should I do to prevent it from unchecking the checkboxes.
i'm using a gridview and has a column of checkbox that is within a template field.
I want to do it in C# but I only found this code in VB
[Code]....
In my previous question mentioned below.
My previous question mentioned
[URL]
Now i am having two dropdown one is asp dropdownlist and 2ND is MultiSelect-DropDownList-with-CheckBoxes. 2nd dropdown is populating on selected value of first.On page load it works fine. Now, on change of value in dropdown, selected index change 2nd dropdown (MultiSelect-DropDownList-with-CheckBoxes) fills but i see a list box instead of dropdown.
On an ASP.NET page with a tabstrip, I'm using the hash code in the URL to keep track of what tab I'm on (using the BBQ jQuery plugin). For example:
http://mysite.com/foo/home#tab=budget
Unfortunately, I've just realized that there are a couple of places on the page where I'm using an old-fashioned ASP.NET postback to do stuff, and when the postback is complete, the hash is gone:
http://mysite.com/foo/home
... so I'm whisked away to a different tab. No good.
This is a webforms site (not MVC) using .NET 4.0. As you can see, though, I am using URL routing.
Is there a way to tell ASP.NET to keep the hash in the URL following a postback?
Just to be forward, my .net and c# expierence is very limited, that one could say I'm a complete noob :) However I do have some grasp on OOP as I usually work in PHP (FWIW). My problem seems to be with this line:
Session["total"] = dt.Compute("SUM(price)", "").ToString();
which will output a total of say "9.2" where as the price is "9.20" from a few record lines as such:
dt.Rows.Add(strRecord, 9.20, dropDownListDistrict_stepTitle.Text);
thus 9.20 + 9.20 = "18.40", but the page displays "18.4".
The label that displays the total sum is:
<asp:Label ID="labelTotal3" runat="server" Text="0" />
From what I've gathered, I'm suffering from some kind of type casting problem? Hopefully I haven't missed anything, its a bit difficult to show all the code but hopefully someone can point me in the right direction? Question is; how can I get an extra decimal place to show up on my sum (or why is it dropping the last decimal place?).
I've declared some properties in MasterPage
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and I'm gonna set their value through other web forms
[Code]....
but the problem is when I navigate to another page, the content of MasterPage is lost
I am validating my text box with regular expression validator(Email). What i need is if i enter a wrong format and if i click on tab t should not move to next text box.
View 14 RepliesI have a Wizard server control to collect data and send it as an Email in the last step the problem i think that the page post back and clear the fields:
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[ThreadStatic]
private static BackgroundProcessManager2 _Instance;
public static BackgroundProcessManager2 Instance
{
get
{
if (_Instance == null) // **
{
_Instance = new BackgroundProcessManager2();
}
return _Instance;
}
}
And ussually everything is fine, but this time on every page load _Instance is null.
Additionally, i have very strange error when trying to watch _Instance in line marked **:
Cannot fetch the value of field '_Instance' because information about the containing class is unavailable.
What can couse this class to upload?
Ok I have this object.ascx. Everythings works fine in an Add scenario (model is null). However when the model isn't null I have metadata for the property in object.ascx then when I call Html.Editor(prop.PropertyName) I have a default instance of modelmetadata within that template. About the only value that is preserved is propertyname. My AdditionalValues are gone, IsRequired, Watermark etc all have default values. I'm seeing bizarro state driven behaviour like this all over the place when it comes to templates. It is peeving me.
[Code]....
So my question is: Why does having a non-null model cause a completely unexpected (and stupid) behaviour? I find it hard to believe this is intended.
We have a problem on a new server where disabling a themed button loses its theme. This happens consistently on all buttons now.
We just switched to a new iis server 7.5 using asp.net framework 4.0
Before, the buttons through out the website have a nice style/theme. These are not set inside each button and there are no classes set specifically for buttons I dont think but I believe inherit the theme from I believe the web.config in either:
All the buttons did display a nice light blue gradient, and when disabled they go a few shades lighter blue
For some reason now in .net framework 4.0 all disabled buttons seem to lose their theme and become the default grey color. Enabling them again brings its theme back
why the disabled button would look different now?
I have an issue of keeping the authentication and session state on a downloaded page, on the same website.
I have 2 pages, page 1 will download page 2, using the following code:
Page 1 code:
System.Net.WebClient webClient = new System.Net.WebClient();
byte[] buffer = webClient.DownloadData("http://www.mywebsite.co.uk/page2.aspx");
return Encoding.UTF8.GetString(buffer);
but the authentication is lost, so i needed to re-login in page 2 by writing auto login code myself.
But then the session is lost, so the session variables set in page 1 cannot be share to page 2, and vice versa.
I'm using a GridView to display some columns and rows that reside in a database. This works excellent. Because i wanted to add columns dynamically out of a List of names. Let's say we have a list with 5 names in it, then it dynamically creates a column for every name in the GridView.
Here's some code to display what i do:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//Create columns for each student
List<Student> allStudents = new Eetlijst.Business.Students().GetAll();
allStudents.Reverse();.......
How do i create the dynamic columns for each row? I create them with a DataBound event. So when the GridView databinds, the columns get filled with data. There is also a check inside to see if the row is in edit mode or not. So when i click on the edit button next to the row, the row goes perfectly in edit mode. The code i made adds a TextBox control to the cell.
When i fill in a value and press the Update button, it can't find any controls anymore and therefore i can't get the value i entered. The control is still there in the DataBound when i put a break point after it. But as soon as i click the Update button, all the controls of the cells are gone.
I searched on the internet and all i found is that it has something to do with the application firing a postback before it reaches the RowUpdating method.
So, how can i let the controls exist that i added to the cell when it is in edit mode?
I'm using a Ajax SliderExtender in a UpdatePanel. I set a BehaviorID and call $find('behavorID').add_valueChanged function in the $document.Ready. Everything is fine but when I press F5 and refresh the page, I lose the slider in a 1/3 (wtf) chance. If I set var slider = $find('behavorID'), it recognises slider is null.
View 1 RepliesI have a web page with several databound (via their property's) user controls in a multiview in a formview.
I decided to try Ajax (Adding ScriptManager, updatepanel etc).
All works fine except for the user controls.
The controls I use to contain the usercontrol property values ((invisible) Textboxes or Hidden fields) lose their value when i change from ond multiview panel to another. (In other words: usercontrols on invisible multiview panels lose their property value's). (When I change a multiviewpanel all the property fields turn emty, when i hit the update button of the formview afterwards the emty values are propagated to the database. (resulting in loss of data)) Textbox seems to hold its value, hiddenfield loses its value (when changing from one multiview panel to another).
This seems to be a coplication of the multiview in combination with ajax.
have a checkbox (AllofNevada) that should enable/disable a checkboxlist (of counties in Nevada). The javascript code I have works. I placed the code:
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This is fine in the beginning but once the user selects 'save' and the code:
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I can't figure out why these collapsible panels are losing their white space inbetween each header after the panel is collapsed.
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