Checking Hidden Field Is Empty Or Not?

Aug 13, 2010

i have a

<asp:HiddenField runat="server" ID="ListTwoHiddenField" />

i have some programming aspect how can i check whether hidden field is empty or not i mean i want to check that ListTwiHiddenField.items.cout==0 or empty how can i check this

View 2 Replies


Similar Messages:

C# - Hidden Field - Value Is An Empty String Upon Postback Inside Custom Control

Jan 17, 2011

I have a custom control that has a hidden field. Upon postback I want to obtain the value stored in it, but it's always an empty string.I am performing client-side manipulation of the hidden field values and have verified in firebug that the fields are correct before issue a post back,Here is the setup:

public class DualListPanel : SWebControl, INamingContainer

{
protected IList<DlpItem> UnassignedList { get; set; }
protected IList<DlpItem> AssignedList { get; set; } [code].....

View 3 Replies

State Management :: Hidden Field Value In User Control / Make The Hidden Field Save Its Value?

Mar 23, 2011

I have a custom user control which contains a asp hiddenfield object. The value of this hidden field is being set using javascript and I have verified that the value is being set properly. When a postback occurs the new value is not being saved and I cannot access it in my code.

I believe the problem is because the user control is not saved in viewstate and therefore the hidden field value is not saved accross postback. How can I make the hidden field save its value? I tried accessing it from the early page cycles and still no luck.

View 4 Replies

Gridview Hidden Field - How To Get A Hidden Field Value Using JavaScript

Jan 7, 2010

I have Gridview like this:

<asp:GridView ID="gvPartsSearchResult" runat ="server" CssClass="MRJ_TextGrid">
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:RadioButton
ID="rdButton"
runat="server"
AutoPostBack ="true"
onclick="javascript:CheckOtherIsCheckedByGVIDMore()"/>
<asp:HiddenField
ID="hdnFileExtension"
runat="server"
Value ='<%#Bind("FILE_EXTENSION")%>'/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

I want to read the hidden field value when the user clicks on the radio button.

View 2 Replies

The Un-checking Of The Checkbox Does Not Seem To Be In Sync With The 'hidden' Value?

Feb 24, 2010

When I used the html Helper Checkbox, it produces 2 form elements. I understand why this is, and I have no problem with it except:The un-checking of the checkbox does not seem to be in sync with the 'hidden' value.What I mean is that when I have a bunch of checkboxes being generated in a loop:

<%=Html.CheckBox("model.MarketCategories[" & i & "].Value", category.Value)%>

and the user deselects and checkbox and the category.Value is FALSE, the code being generated is:

<input checked="checked" id="model_MarketCategories_0__Value" name="model.MarketCategories[0].Value" type="checkbox" value="true" />
<input name="model.MarketCategories[0].Value" type="hidden" value="false" />

This is wrong since the Value is False the checkbox should NOT be checked.

View 3 Replies

Web Forms :: Make Visible / Hidden On Checking Check Box?

Feb 10, 2011

how to make Visible hidden on checking check box?

View 5 Replies

Empty Field In SQL Database, Using A Datalist Do Not Display The Empty Fields?

Jan 15, 2010

I have a sql database that on some field will have a empty string/field. I am using a Datalist to display my results. How do I not make the labels that are empty not display? Currently if the field is empty it will leave a space there which my goal is if the field is empty do not leave a white space instead move the other colunms up.

View 2 Replies

Checking If TextBox Is Empty On Lost Focus

Sep 20, 2015

I have this code to check if the textbox is empty on lost focus. Setting IsAutoPostBack = True and using TexTChanged.

Code:
if (string.IsNullOrEmpty(TextBox1.Text))
{
<Code Here>;
}

The problem is when I make any no changes on Textbox1 and goes to the next textbox, this code doesn't work. so I cant trace if the textbox is empty or not

View 1 Replies

Web Forms :: Difference In Using Codes For Checking Empty Control

Aug 13, 2010

Is there any difference in using the following for checking for an empty control.

If txtBox1.text.tostring isnot string.empty then
vs.
If txtBox1.text.tostring <> string.empty
vs.
If txtBox1.tetxt.tostring <> "" then

View 8 Replies

Web Forms :: What's Simplest Method Of Checking For Null - Empty Text With Vb

Feb 20, 2011

Is there one simple test that a person can do that covers all options where there could be a null, or "" value. When I google, I see so many options. I see:

if txtBox1.text IsNot nothing
if txtBox1.text.toString isNot nothing
if txtBox1.text <> ""
if txtBox1.text.toString <> ""
if isNull(txtBox1)
Is there on test that can cover them all?

View 10 Replies

Checking For Empty Array - Get Object Refernce Set To Null Error

Oct 19, 2010

How do i check for empty array?

If I write

If Not ls_filename.Length = 0 then

....

End If

I get object refernce set to null error

View 4 Replies

DataSource Controls :: Ignore Empty Field Because Always Join The Field And Separate By Space

Mar 3, 2010

I wanna join all the field as a new col.

but how can i ignore the empty field because i always join the field and separate by space like the following.

select (field_1+' '+field_2+' '+field_3) as new_col from TABLEA

but if the field is empty, then there is the double space

how can i ensure all the space is one space only.

View 2 Replies

Web Forms :: Required Field Validator Not Catching Empty Field?

Feb 3, 2010

I have a aspx page with a ascx control inside an ascx control and the required field validator is not hit on the action of the page.

The issue is with the 2nd nested ascx control. The field validators in the first ascx control validate correctly, but with the ascx control inside the ascx control there are issues.

The nested ascx control is a repeater control and this may be the reason, but I am unsure.

I'm not exactly sure what question to ask, but I'll list a few below.

How do I attach the field validators up a level to the 1st ascx control?

Is it possible to put required fields into a nested ascx control?

View 7 Replies

Web Forms :: Use Of Asp.net Required Field Validator For Checking Name?

Oct 14, 2010

Sometimes while registering on the website people don't provide correct details like name and e-mailIn order to check correct e-mail it is better to use e-mail activation link send to their e-mail.But how to make sure the user is providing correct name ?I am really impressed by the Facebook name recognition system, it we try to use any word which is not a name, it asks you to enter a valid name.Is there any way we can make use of asp.net requiredfieldvalidator to check if user is providing a correct name or not ?I know we can make use of requiredfieldvalidator to see how many alphabets / special symbols etc butIf we put minimum alphabet requirement - in that case user can enter "....." and can easily bypass the requiredfieldvalidator or a user can easily write "iamfakeuser" instead of name and bypass the requiredfieldvalidator.
question is how to check if name is correct or not just like facebook registration form ?

View 5 Replies

Asp Mvc Jquery Hidden Field

May 12, 2010

the thing is that I have a form with a textbox and a button and a hidden field, now what i want to do is to write something in the textbox ,pass it to the hidden field and then access that thing written in the hidden field in the controller . how can i do that?

View 3 Replies

Hidden Field Vs Viewstate?

Jan 23, 2011

What is the difference when using ::

Hidden field vs View state??

when to use each one ??

which one more secure?? and which is better than in performance?

what are the alternatives?

View 3 Replies

Forms Data Controls :: Checking The Required Field By Javascript?

Aug 10, 2010

I have some controls on the asp.net page that can be required on certain senario and can be not required on others.

So we enable/disable them dinamaically depending on the current transactions.

Now I am thinking of a way where I can check the required field by Javascript on the click event of save button. Remember control not be required at all time.

View 5 Replies

How To Able To Assign A Value To My Hidden Field Control

Mar 4, 2010

how am I be able to assign a value to my hidden field control? I have this web service that returns member's ID and name (e.g. 0001-John dela Vega). In order for me to search for a member, I'm using an autocomplete extender, now, if in case that I found the member I'd like to assign its member id to a hidden field. I ask this because I'd like to change the way my web service return data so instead of displaying the member's id and name at the same, I'll just show its member name.

View 1 Replies

The Hidden Field Still Carries The Old Value On The First Postback

Nov 23, 2010

i have a javascript function written like this

[code].....

Now this is working fine but , lets say i have 10 textboxes, if i change the value one the first textbox to be the same as the second textbox , it means it is a duplicate, now the problem here is that the value of the hidden field does not get updated immidiately , you have to click twice to get the real value.

View 1 Replies

VS 2008 Write The Value To The Hidden Field Thru JS?

Mar 14, 2010

wnat to set the HIDDEB FIELD VALUE THRU JS. But I am gettin the error,can anyboy help me out!

Code:
<input id="HiddenField1" type="hidden" value="" runat="server" />

Code:
var _textbox1= document.getElementById('<%= textbox1.ClientID %>');
document.getElementById('HiddenField1').value = _textbox1.value;
alert(document.getElementById('HiddenField1').value);
ERROR(IMAGE ATTACHED)

View 2 Replies

Hidden Field Value Lost On PostBack?

Mar 12, 2010

I have a hiddenfield, which I want to save the scroll position of asp.panel scrollbar during postback, and when during postback this value is called back to set the scroll position.

Using javascript I can grab the value from the scrollbar, and assign it to the hidden field, but when I post the page back the value has gone.

Here is my code snippet:
<script type="text/javascript" language="javascript">
function SetScroll(val) {
[code].....Am I missing something? How do I keep the value during post back?

View 27 Replies

Dynamic Hidden Field After A Postback

Sep 18, 2010

you save data into a dynamic hidden field ,which is created dynamically during the handling of some postback event.what is the best way to retrieve it from this field upon a postback, (besides searching the request for the key of this hidden field and then retrieving the corresponding value as in the code below)?

protected void Button2_Click(object sender, EventArgs e)
{
bool found = false;
for (int i=0; i<this.Request.Form.Keys.Count; i++)

[code].....

View 1 Replies

MVC :: How To Keep A Hidden Field Populated On Validation

Jan 31, 2011

I have a form in MVC3 that includes a check box to copy data if it is the same as a previous form. If the checkbox is checked, it populates the text box with the content from the hidden field. Here's a sample to illustrate what I'm doing:

[Code]....

When the box is checked, it calls FillInfo(), which uses DHTML to fill the TextBox called "ThisInfo" with the value of the hidden field "DefaultInfo."

Here's the problem: if the form fails validation (e.g. "ThisInfo" is a required field and is left blank), the hidden "DefaultInfo" box is getting cleared out -- which I DON'T want it to do. As a result, when the checkbox is clicked, it is copying empty data into the "ThisInfo" field.

View 8 Replies

Hidden Field Value Lost When Postback?

Feb 4, 2010

I have a problem

<script language="javascript" type="text/javascript">

View 2 Replies

Updating A Hidden Field Via JavaScript?

Feb 3, 2011

I inherited some JavaScript that I was told to integrate into our ASP.NET site. I thought this would be straightforward but it's turning out to be a bit of a challenge.

The code looks something like this:

<SELECT id="Question1" name="Question" onchange="updateQuestion();">
<OPTION value="notChosen">--Please Select One--</OPTION>
<OPTION value="in">India</OPTION>
<OPTION value="de">Germany</OPTION>
<OPTION value="fr">France</OPTION>
<OPTION value="us">United States</OPTION>
<OPTION value="ch">Switzerland</OPTION>
</SELECT>

The goal is to get the value from this HTML control into ASP.NET, however this control itself is being dynamically generated by another chunk of javascript, so I can't just change this to an asp.net control. My solution was to add the onchange="updateQuestion();" method, this JS will take these SELECT tags and place the values into an ASP.NET control:

function updateSecQ() {
var sQuestion = document.getElementById('<%=sQuestion.ClientID%>');
sQuestion.Value = "";
var questions = document.getElementsByName('Question');
for (question in questions) {
if (questions[question].value != null)
sQuestion.Value += questions[question].value + ",";
}
alert(sQuestion.Value);
}

As you can see, that's looking to update an ASP.NET control:

<asp:HiddenField ID="sQuestion" runat="server" value="" />

This appears to all work, however when I goto the server side on the form submit I see that sQuestion.Value is still = "".

View 4 Replies







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