AJAX :: TextBox Value Not Being Updated From Code-behind?
Apr 21, 2010
I have a webform that accepts a date range to generate PDF reports. I had to place a PostBackTrigger on the updatepanel and assign the button thaat generates the reports because the Response.ContentType is being set to "application/pdf".
The problem is I am updating the textbox value to the count of clients that are left out of the report generation in server side code, the count always come back as 0. I have tried multiple panels with no luck. The textbox is in the main updatepanel with the print button and that still does not work.
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Jan 8, 2011
I have a web form for payments which consists of a DropDownList (credit card, purchase order, bill me). By default, credit card is selected, and the form (a ListView within a UpdatePanel) is loaded with the user's billing address. If the user changes the payment option, the form fields change -- for example, if purchase order is selected, the billing address + credit card fields disappear and a "Purchase Order Number" textbox appears. This is done using an AsyncPostBackTrigger associated with an event in the DropDownList.My problem is that when the form is submitted, I cannot see the user-entered values within the UpdatePanel/ListView, but I can see the original values loaded in the ListView before the edits were made. For example, if purchase order is selected, I can see the billing address from the ListView, but I cannot see the newly-entered Purchase Order Number from the ListView.Here's an abbreviated version of my code. I've bolded and commented two lines where the problem appears:
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[Code]....
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Feb 4, 2010
I have been trying to achieve the following:
1-Allow the user to change the quantity in a textbox i.e // "txtQuantity"
2-capture the newly entered quantity i.e //int integerNewQuantity= int.Parse(textNewQuantity.Text);
3-update the database using the newly entered quantity i.e. //UpdateItem(data,integerNewQuantity)
Problem:1-I have not been able to capture the text i.e. the newly entered quantity i.e. the value entered in the text box "txtQuantity"
2-Hence the database is updated using the existing value and NOT the new value unless I make a constant assignment as below:
textNewQuantity.Text = "2"; When tested the assignment of any number correctly updates the database. see the c# code:
C# code: Version.1
protected void btnUpdate_Click(object sender, EventArgs e)
{
txtItemDescription.Text = txtItemDescription.Text + "from btnUpdate talking.."; [code]....
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Oct 31, 2010
I have a asp.net page with a datalist with a textbox and a button on it, on page load the textbox gets text in it, if I change the text and press the button the text doesn't get updated.
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataTable table = CategoryAccess.GetProducts();
ProductList.DataSource = table;
ProductList.DataBind();
}
}
protected void btn_Click(object sender, EventArgs e)
{
string Name = textbox.Text;
CategoryAccess.UpdateProducts(Name);
}
}
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Jul 31, 2010
I am unable to get the updated value of textbox within a listview when "Update" link button is clicked which calls a function.
<asp:ListView ID="_lvCartItems" OnItemUpdating="CartPartItem_OnItemUpdating"
OnItemDeleting="CartPartItem_OnItemDeleting" runat="server">
<LayoutTemplate>
<table width="900px" border="0" style="font-size: small">
<tr style="background: #DDDDDD;">
<th align="center" style="width:80px">Delete</th>
[code]...
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Jun 20, 2012
How to get the values of updated row in the grid view to textboxes
something like
Updatedtxt.Text=GridView1.SelectedRow.Cells[1].Text;
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Feb 3, 2010
I have a page that shows the value of a property of my model. The value of that property is changed in the action-method of the controller (that recieves the model as a parameter). It turns out that this line of code:
<%= Html.TextBoxFor(m => m.Problem)%>
does not represent the value that it got in the action-method-code (just the value it got from the POST), but this does:
<input type="text" value="<%= string.IsNullOrEmpty(Model.Problem) ? "" : Html.Encode(Model.Problem) %>" />
Is this a bug or is some caching-mechanism working against me?
BTW, it is especially annoying when using HIDDENs, because the user can never change that value at all... That's how I found out...
I have a demo-project demonstrating the problem here for download. It is based on the default-application, so very small.
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Aug 10, 2010
I have a formview where there are a few textboxes. I want to show a message when only one textbox(txtAppNum) has been updated. I am not sure if I need to use textchanged event or onchanged event or there is some thing else to make this work.Please suggest me the way to do this.
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Feb 14, 2011
I'm using a hidden field to store a value in an asp.net page. Basically I set the value of the hidden field whenever a value on the form is changed i.e. first name, date etc. The field is on a webform that has a master page and is in the content section:
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<asp:HiddenField ID="hdnDirtyFlag" runat="server" Value='false' />
I change the value of the field in javascript by calling a function whenever an onchange event fires in other controls on the web form:
<asp:TextBox CssClass="niceInput" ID="tbFirstName" runat="server" MaxLength="40" Width="150" onchange='SetHiddenVariable();'></asp:TextBox>
<script type="text/javascript">
function SetHiddenVariable() {
// Set the value of the hidden variable so we know a field has been updated
var hiddenControl = '<%= hdnDirtyFlag.ClientID %>';
document.getElementById(hiddenControl).value = 'true';
}
</script>
So far so good. When the page loads the hidden field value is 'false', and if I don't change any values on the webform it remains false. Whenever I do change another control the javascript function gets called and the hidden field value gets updated to 'true'. Again this is all fine.
After I submit the form and update the database, I set the hidden field value back to 'false' in the code behind:
hdnDirtyFlag.Value = "false";
But when I click another button and do a postback, the hidden field value is still at 'true'.
Can anyone explain why this is? I stepped through the code behind and immediately after changing the value I can see the value is 'false'. There is an asp:UpdatePanel on the page but the hidden field is not part of this panel.
EDIT:
This is the code I use to check the value of the field in code behind in the second postback, after it has been set to false in the last step of the first postback. The value remains at true for some reason in the second postback, after it has been set to true in javascript on the client side then set back to false in code behind as shown above:
if (hdnDirtyFlag.Value == "true")
{
UpdateSecurityObject();
}
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Feb 17, 2010
I have a TextBox in my page
<asp:TextBox ID="TextBox1" runat="server" ReadOnly="true"></asp:TextBox>
I am not able to get the changed value ( I have attached a ajax calender with this textbox)
in code behind because it is readonly
I can do this using TextBox1.Attributes.Add("readonly", "readonly"); or I can get the correct last value using Request.Form[TextBox1.UniqueID]
Why value is available when we use code behind attribute add
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Oct 9, 2010
i m using ajax validatorCalloutextender with regular expression validator(for numeric values). It is working fine on a textbox but with same code on another textbox it is showing error msg this control is valid inspite of showing required error msg. The code is same for both textboxes.
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Apr 14, 2010
I have a GridView with an ItemTemplate and an EditTemplate:
[code]....
I am able to go into Edit Mode and once in edit mode I can see the textBox tbLogEntry fine. lblLogEntry is gone. I have left regular Item mode and am in Edit mode:
[code]........
gives me back the original value, not the new one.
How do I get the edited value from the front end textbox?
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Apr 15, 2010
I am using an anchor tag in my application for which I am assigning href an image url which i am saving in code behind. Images are saving perfectly from code behind but are not updated in anchor tag. I think this may be a browser dependency because I checked the property of fresh page rendering in IE option then all the things are working fine but this is recommendable.
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Jan 4, 2010
I was trying to update a detail view from code behind (vb.net). I know how to fire the event but dont know where to put the DML query where i should do update and insert, i mean in which event?:
update.aspx
[Code]....
update.aspx.vb
[Code]....
No error but is not working.
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May 10, 2010
I have a grid view that is dynamically created.In which every cell in the girdview has a 2 textbox (cTxtboxQty,ctxtWorkOrder) and 2 label.
When user click on the cell, a pop up come out and user are able to change the text inside the cell and click save.After that the pop up close and changed data immediately reflected on the screen.
My problem is:
After my data are changed and updated to database on the pop up page and having it post back to the parent page , my dynamically created textbox in gridview retain old value even new value has been assigned to it.
This sound very weird but i have no idea how to solve this.
My client side code is as below :
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I have tested many times and find out that it might be the page hold the old value in memory, so that even we have updated the textbox value, after postback, it still keep and show the old value?
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Jul 31, 2010
I am using ajax colorpickerextender control for color selection. For TargetControlID, I have used a textbox. It shows hexadecimal color code into that textbox. Using this post I have resolved this for colorselection change event. I am saving selected color into an xml file and reassigning it to the color control when form loads. My problem is at loading it shows hexadecimal code.
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Nov 21, 2010
Here is my code. I just wanted to update one column. Why is everything getting NULL put into it?
[Code]....
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Feb 15, 2010
am fairly new to AJAX, but have successfully got my page working in FF and somewhat working in Opera and Chrome.I have made a table, and populated cells of that table with an AJAX call to a sever side script.I am then using those cells in mathematical equations on the client side.In FireFox this works smoothly, In IE it fails completely. IE doesn't see that there is a value to the cell of the table, even though it displays the information in the cell after the AJAX call. Am I doing something wrong to make IE over look the fact that i have changed the DOM? or am I doing something completely impossible in IE?I need a way to let IE know that there is a value in the cell.
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Sep 23, 2010
Strange problem with CalendarExtender
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The text box is updated correctly if it is empty or if the date is invalid e.g. 9/292010.
If the current text is 9/29/2010 and a different date is clicked then the calendar stays open with the previous date selected. I get the following error message "e.getDateOnly is not a function".
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Dec 10, 2010
i have three text fields in a page and i placed those in Update panel and that update panel is updated on cancel and submit button click event, and after insertion that record is displayed in gird it works properly but i am facing one problem that i have a common Pannel for all types of messages like(update,delete,insert,error messages) and i have define this panel in master page so how can i update that panel on update or according to my requirement .........
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Sep 3, 2010
I am using a update panel in my webpage. I am having a treeview in it . The css property of the Treeview before updating is different from after.
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Aug 12, 2010
I am using Ajax on a Sharepoint 2007 website and I have copied in the AjaxControlToolkit.dll into the bin folder.
Method CreateModalUpdateProgress Details Could not load file or assembly 'AjaxControlToolkit, Version=1.0.20229.20903, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The located assembly's
manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) Stack Trace MyWebParts. HelperClasses. WebPartControlFactory. CreateModalUpdateProgress (Control controlToAddTo) MyWebParts. BaseClasses.
BaseWebPart. CreateChildControls()
Please contact a system administrator and provide them with these details
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Sep 14, 2010
I have an ASP.NET AJAX application, which is using .NET Framework 3.5. I have visual Studio 2008 installed on my developer machine. The AjaxControlToolKit dlls I have installed in my system right now come from the file "AspNetAjaxLibraryBeta0911.zip". The released date of the dlls in the file is 12/29/2009. Exploring the AjaxControlToolKit download site, I found that there is a more updated version, which release date was April 12th 2010.
I tried to update the AjaxControlKit.dll version to the newest one. I did this creating a path in my system: c:Program FilesAjaxControlToolKitWebFormsRelease then I placed there the new AjaxControlToolKit.dll and AjaxControlToolKit.pdb files. Then I right clicked on the name of the dll inside my Bin directory in my application and selected "Update Reference". After I did this I tested the application and is giving me Jscript error messages like: "htmlfile: member not found", or Microsoft Jscript Runtime error "lenth is null or not an object". I don't get these error messages if I come back to the previous version of the AjaxControlToolKit.
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Mar 2, 2010
Whenever I load the asp.net page first time the page source is updated but
when postback fires through ajax then I view the page source from browser,
It is the same which loads first time.
Why it is not updading?
How can I view the updated one?
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Aug 8, 2010
I've created an AsyncFileUpload device that uploads an image in ListView but it doesn't refresh on the page until the page is manually refreshed. how to accomplish this? This is the applicable code:
In ListView control:
[Code]....
After ListView control:
[Code]....
Code-behind:
[Code]....
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