C# - Changing The Value Of A DropDownList In .Net Client Side?

Dec 10, 2010

Assuming that I can't modify the code-behind file for a site (it's a compiled site), I've encountered a bug of mine that can only be fully fixed with a complete recompile and redeployment. Unfortunately, we are on a strict release schedule and we can't deploy for another 11 days.

The bug is that I'm doing a check on a drop down to make sure that the value that is selected isn't "-1". However, I didn't use drp.SelectedItem.Value, I used drp.Items[0].Value. Total bonehead move on my part. The bottom line is that drp.Items[0].Value is ALWAYS -1, so they page gives an error to the user stating that they need to choose an option for that drop down. Which they really have, but my bug is not letting them continue in this process.

So, I'm trying to determine if I could, client-side, replace the value of the first drp item to the actually chosen value of that drop down.

I've gotten this all to work client-side, but when the form is posted back, the value is still the value that was populated from code, meaning "-1".

I'm sure this is because the drop down is loaded and all the values are held in ViewState.

View 1 Replies


Similar Messages:

HttpHandlers / Modules :: Image Changing In Client Side?

Mar 2, 2011

Environment: IE7, ASP.NET 3.5 SP1, C#, IIS 7, intranet, SQL server 2008 R2 enterprise. I'm trying to implement a page with 3 pictures in it (each picture is up to 1MB, jpg format), and switch them with the next 3 each 250 milliseconds. I thought of several methods for implementation:

1. Store all the pictures in a virtual folder, then switching the src attribute of img html element by javascript, and manipulate caching by storing the next 9 pictures also as img element, but with display:none for css.

2. Store the images in a database table and than send it to the client using DIME (don't know how to do it yet).

3. Store the images in a database table and use custom http handler to retrieve the picture (don't know how to do it yet).

4. Client invocation of webservice? Which of the above results the best performance? Is there another method for caching pictures?

View 10 Replies

.net - Button, Changing CommandName And CommandArgs On The Client Side?

Feb 3, 2011

Is there a way to change the values for these two attributes on the client side and have it reflected on the server side after the postback. I tried it but it does not seem to work. I wanted to have one button on the page that I would delegate submits too, and assign these two arguments on the client side. Seems like not possible. Assuming there is a button named "cmd" in the form

<script type="text/javascript" language="javascript">
$(document).ready(function () {
$("#<%=cmd.ClientID %>").click(function () {[code]....

If one checks the value after postback they are still the same as they were before postback.

View 1 Replies

Web Forms :: Client Side Custom Validator Changing Textbox Values?

Mar 19, 2010

I've been working on a task to add a validator to compare the values of two text fields in a ASP.NET 1.1 application.

It uses validators already, so the best approached seemed to involve a CustomValidator. I was inspired by the following example:

[URL]

I got the server side validation working - now I'm trying to add some client-side validation but I'm having a strange issue.

When I click in either of the two text fields, the value of the txtFinalGrade field is overridden to either "true" or "false". I've been having a tough time tracking down the code that's causing this. I tried using the IE Developer Toolbar to trace the script - as well as FireBug in Firefox (though this is an IE-only app) and I'm still trying to figure out what's causing this to happen.

Since I think this is a JavaScript issue, I'm posting that part of my code:

[Code]....

Anyone have ideas of things to try? Anyone have similar issues with textboxes being set to true/false when working with custom validators?

View 3 Replies

Javascript - User Control With Client + Server Side CustomValidation; Wrong Client Side Validator Is Picked

Nov 23, 2010

I have a user control which contains a CustomValidator which is used according to whether a RadioButton is checked or not (there are several RadioButtons, I'm only showing the relevant one)

<asp:RadioButton runat="Server" ID="RadioBetween" GroupName="DateGroup" CssClass="date_group_options_control_radio" />
[code]...

There is some client + server side validation code (the server side code does exactly the same thing and is skipped for brevity)

<script type="text/javascript">
function ValidateDateFields_Client(source, args) [code]...

There are two instances of this control in the page. When running the client side version it hits the wrong one (the version of the control which is disabled). You can see from the generated HTML both are correctly specified. I'm not sure how .NET works out which clientside function to call given they both have the same name.

<script type="text/javascript">
//<![CDATA[
var ctl00_MCPH1_QueryTextValidator = document.all ? document.all["ctl00_MCPH1_QueryTextValidator"] : document.getElementById("ctl00_MCPH1_QueryTextValidator");

[code]...
Do i need to add something in to scope it? What's the best way to achieve this? If I disable the loading of the second control everything works fine.

View 1 Replies

Dropdownlist In Gridview In Update Panel To Trigger Client-side Confirm Box

Nov 19, 2010

I have a gridview.The Gridview is in an update panel.I added a dropdownlist in a template column of the gridview.I have autopostback set to true.I have code working in the selectedindexchanged event all of that works great now I want to add a javascript confirm prompt on client-side change of the dropdowns,I have it popping up the confirm box, but no matter what the user selects (ok or cancel) it does not post back

<asp:DropDownList ID="ddlWinnerStatus" runat="server" CssClass="winStatusDDL" OnChange="return ShowWarning(this);"AutoPostBack="true" OnSelectedIndexChanged="ddlWinnerStatus_OnSelectedIndexChanged"></asp:DropDownList>

View 1 Replies

Javascript - Trying To Add A Client Side Event To A Dropdownlist And I Need To Access The Currently Selected Text?

Sep 1, 2010

I am trying to add a client side event to a dropdownlist and I need to access the currently selected Text. I have tried:

ddl_tech.Attributes.Add("onclick", "document.getElementById('" + chk_techreview.ClientID + "').disabled = this.options[this.selectedIndex].text.Equals(' UNASSIGNED');");
and
ddl_tech.Attributes.Add("onclick", "document.getElementById('" + chk_techreview.ClientID + "').disabled = this.text.Equals(' UNASSIGNED');");

Both of which give me runtime errors when the event is fired.Whats the correct way to access this text property client side?I tried this but it does not enable the checkbox...

ddl_tech.Attributes.Add("onchange", "document.getElementById('" + chk_techreview.ClientID + "').disabled = this.options[this.selectedIndex].text == ' UNASSIGNED';");

ANSWER:

Well, along with having to use == rather than .Equals, when you set a checkbox.enabled = false on the server side it raps the checkbox in tags and sets it to disabled=true; therefore you must set BOTH the checkbox.disabled = false and checkbox.parentElement.disabled = false; on the client side to enable the checkbox!The solution:

ddl_tech.Attributes.Add("onchange", "document.getElementById('" + chk_techreview.ClientID + "').parentElement.disabled = (this.options[this.selectedIndex].text == 'UNASSIGNED'); document.getElementById('" + chk_techreview.ClientID + "').disabled = (this.options[this.selectedIndex].text == 'UNASSIGNED');");

View 2 Replies

Web Forms :: How Do You Write To A Client-side Control (text Box) With Server-side Code

Jan 6, 2010

If I have a standard HTML textbox

[Code]....

but got a readonly error.

View 10 Replies

Access Server Side Variable On Client Side And Vice Versa And JavaScript?

Dec 9, 2010

I have a requirement of adding server side variables in client side and other way round. Because I need to set a value from client side using javascript and access the same in code behind page.

I have to use C#.Net and JavaScript.

View 2 Replies

Jquery - Options For Page With Matching Client-side And Server-side Markup?

Oct 17, 2010

Suppose I'm building a StackOverflow clone using webforms ASP.NET and jQuery. The Question page has a question, several answers, and comments under each. Requirements:Users can post new answers and comments, and edit existing ones, without postbacks. No UpdatePanels; the AJAX calls retrieve just the JSON they need, not HTML fragments. The page loads with all existing answers and comments in place (no javascript needs to run to read the page).

What I'm trying to figure out is how to do this without having to maintain two sets of markup (one that's bound on the client using some form of jQuery templating, and one that's bound on the server using traditional WebForms).

View 7 Replies

Ajax - Listbox Items Client Side Reordering Not Reflected In Server Side?

Jan 5, 2010

I reordered some items in a listbox using Javascript. When I read the items in a postback in the code behind (ASP.NET), the order is in the original order. How do I get the same order as shown in the screen after Javascript manipulation?

View 3 Replies

AJAX :: To Know Error Like Username Or Password Is Incorrect On Client Side Instead Server Side?

Oct 4, 2010

I m using site login Control in my login.ascx file and disaplaying login control in Div so if there is login link in page and i click on that then Login Div will popup which is site login.May i know how can handle error like username or password is incorrect on client side instead server side?

View 6 Replies

Print The Aspx Page Either Using Server Side Or Client Side Approach?

Feb 9, 2011

I have to implement the print functionality on aspx page like on click of print image icon user will be able to get the print out of aspx page .aspx page will contain the server controls like textboxes , Gridview etc which one approach will be the best server side or client side printing ?

View 4 Replies

Web Forms :: Setting Hidden Value Server Side And Accessing On Client Side?

Jul 19, 2010

I am trying to set a hidden type value to x on Server Side and then access it with Javascript. I have tried multiple ways to accomplish this.

At the basic level this is what I am trying to do.

Aspx page
<asp:HiddenField ID="HidRowNumber" runat="server" />
CS Page
In IsPostBack
HidRowNumber.Value = EFileRowNumber.Text;
Javscript
var status = document.getElementById("<%= HidRowNumber.ClientID %>").value;

When I am debugin it say it HidRowNumber's Value has changed to x but when I access the value with JS it always returns ''.

View 23 Replies

Web Forms :: How To Unescape( Escaped HTML) By Server Side Not By Client Side

Aug 7, 2010

i can use escape() and unescape() functions by Client side easily, but the problem when i have use escape() method for peice of HTML , then i dont know how to unescape this piece of HTMl By Server Side not By Client Side. how i can unescape (escapped HTML) by server side?

View 2 Replies

Web Forms :: Retrieve Value If Server Side Control Value Is Updated On Client Side

Oct 26, 2010

I have a hidden variable and its value is being updated using javascript(client side) which I make a call from server side code. After making the call I am not able to retrieve the updated value from Server side variable. I went through this forum [URL] but not able find a way how to implement functionality with IFRAME. I am trying to call the client side code and retrieve the updated value from server side in page_load event.

View 5 Replies

VS 2005 AJax Tab Container - Enable The Server Side Not Client Side

Feb 4, 2010

I have set the ajax tabs disable on form load. ON button click, I want to enable the tab server side,not client side.

protected void btnEnableCostPetroleumTab_Click(object sender, EventArgs e)
{
TabContainer2.Tabs[0].Enabled = true;
}

But its not enabling the tab?

View 12 Replies

Server Side Control Hidden - Possible To Read Values Client Side

Jan 30, 2010

I've got two textboxes running server side and have their visibility turned off. I'm using a couple of ASP.NET controls which require the textboxes to exist. However, I am filling them from the code behind and would not like the user to see this. Can the user turn the visibility on and see the values entered in the text box? I tried using FireBug, and I couldn't seem to select the visibility option in order to edit it. However, I'm quite new to Firebug, so there may be another way? Or does running it server side mean that the client can't ever view the contents of the textbox?

View 1 Replies

JavaScript - Exposing Server-side State Through Client-side Controls

Feb 11, 2011

I have a list of items on an ASP.net page. That list is selectable in that whenever the user clicks on one, the page does a postback and the server code stores the index or some unique identifier of the picture in a ViewState property indicating that it is currently selected.

I would like to minimize the load on the server and therefore I would like to store the index or unique identifier representing the image in some way on the client side. The best way I can think to do this is to store said information in a hidden field ), however I had two questions about this before I go crazy:

Is this a security risk in any way, shape or form (i.e., exposing implementation details of the page)?
Is there a better/best way to do this that is more industry-standard? Does ASP.net provide a framework to do this that is cleaner than my idea? Seems like this would be a fairly common requirement to me...

View 1 Replies

First Invoke Server Side Code Then Client Side Script Without Using AJAX?

May 18, 2010

in a form i have a buttoin, when click both OnclientClick and postback should happen. on clicking the "Email" button a client side "mailto" tag should do the work and pull a new message window on the client's machine.

whereas, the email addresses should be invoked by the post back. so , when clicking the button the server side post should happen and on return the client side script should be invokded with the values read during post back, and populate all the email addresses.

i need know how to first do a server hit take the values and then execute the client script with those values without using AJAX

View 1 Replies

How To Write To A Client-side Control (text Box) With Server-side Code

Jan 6, 2010

If I have a standard HTML textbox: I can retrieve the value using Request.Form. But how do I go about populating this textbox from the server-side? I tried Request.Form["txtTest"] = "blah"; but got a readonly error.

View 2 Replies

Accessing Client - Side Generated Table Rows Through Server - Side

Feb 23, 2010

The idea is that a pure html table will be generated on the client side. (using jQuery to add dynamic new rows to the table when the user clicks a button). These rows contain textboxes, dropdownlists, checkboxes and other input controls. When the user clicks a button, a PostBack is triggered in which I need to access this data from the table on server side, validate it and perform other actions on it.

I'm able to perform the client side and access the table data on server side by adding runat="server" to the table tag. However, I only see the initial table rows (not the ones added through JavaScript) and I have troubles retrieving the different inputs from the rows. put me in the right direction?? Or someone offering a better solution to the problem?

View 2 Replies

C# - Encrypting Text Fields At Client - Side And Decrypting Them At Server - Side

Feb 5, 2011

I have a content-sensitive firewall between my clients and my server. If we exclude SSL solution (it's not available in my case) then I was thinking of a javascript library which encrypts custom fields at client-side and a .NET class decrypts them at server-side. Is there any solution out of the box (maybe a server control) ?

View 2 Replies

How To Preserve Literal Text From Server Side When Displaying On Client Side

Mar 2, 2011

ASP.NET newbie question - fastest fingers!

I have a page that needs to pull some script off the server, including tag info, for the page. Thus:

<html><body>
blahblahblah
<%: Model.TaggedField %>
</body></html>

Problem is, the value of Model.TaggedField may include HTML tags, but the page automatically converts the tag info to <myTag> etc.

What method can I call to make the value of Model.TaggedField be transmitted verbatim to the page?

View 2 Replies

HTTP POST, Redirect To JSP/ColdFusion,best Server Side Or Client Side?

Jan 25, 2010

I want to post data to another server (JSP or ColdFusion).

Note:Post which means the data is required at the another server also the browser should be redirected automatically.Is it better to use form tag...input type hidden fields, values...

and from javascript

form.submit();

[code]...

I should use WebClient class?Please provide the points from Security view also.

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved