Web Forms :: Required Validator Disappears After Autopostback Set To True Of A Dropdownlist
Oct 13, 2010My dropdownlist having data from database added with the following item:
DropDownList.Items.Insert(0, new ListItem("Please select", "0"));
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Web Forms :: Required Field Validator Disappears On Dropdownlist Post Back
Apr 15, 2010 I populate two dropdownlist in asp.net. Both are assigned to a required field validator.
The codebehind is as below
[Code]....
the designer code is as below
[Code]....
Now what happens is, when i choose a field from the dropdown and once again when i choose the "-- Select--", the validator appears and then disappears.Where am I going wrong?Why doesnt the validator stay?RegardsHema
C# - Required Field Validator Disappears On Dropdownlist Post Back?
Apr 14, 2010I populate two dropdownlist in asp.net. Both are assigned to a required field validator.
The codebehind is as below
if (!Page.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add("emp");
dt.Columns.Add("ename");
[Code]....
Now what happens is when I choose a field, and then once again go and choose"-- Select--", the validator appears and disappears.
Why doesnt the validator stay? Where am I going wrong?
Web Forms :: Dropdownlist Selectedindexchanged Not Working With Autopostback = True
Jan 19, 2010i have two dropdownlist in my webform both are filled dynamically in the page_load event
[Code]....
Web Forms :: DropDownList Selected Value Getting Lost When AutoPostBack Is True
May 7, 2015Am using DropDown list. Whenever Autopostback is true it selecting first value of dropdown list...
View 1 RepliesWeb Forms :: How To Control Onselectedindex Change Event Of Dropdownlist On Autopostback Is True
Jan 8, 2011I am having a problem with dropdownlist auto post back set to true...
In my project I have to hide and display two other dropdown lists depends on selected index change of a main dropdown..
I set the auto postback to true and I am hiding and displaying the dropdowns on user selection...Everthing is working fine..
But I am having a very hard time when user types when the dropdown got focus..this is very annoying situation..if type one word its doing a postback and they are unable to type further...
is there any way to fire this onselectedindex change event on blur or on enter key press...is there a way of doing it with java script or jquery...
Web Forms :: How To Validate DropDownList Using Required Field Validator
Jul 3, 2012i want use this control for dropdownlist i wrote below code
<asp:DropDownList ID="DDL2" runat="server" CssClass="DPCDDL">
</asp:DropDownList>
<asp:RequiredFieldValidator Display = "Dynamic" ID="RequiredFieldValidator4" runat="server"
ErrorMessage="please select your classification." ControlToValidate="DDL1" CssClass="valid1"></asp:RequiredFieldValidator>
but it didn't work how i can define that users should select one item from DDL?
Forms Data Controls :: FormView, AllowPaging=true, And AutoPostBack=true?
Feb 24, 2010It took me a little while to figure this out, but the AllowPaging="true" on the FormView seems to be the culprit. I don't have much experience paging from a FormView, but for this requirement the customers wants this kind of UI.I have a FormView with DefaultMode="Edit", which is bound to an EntityDataSource. One of the entity's properties, "ExternalID", determines whether some of the other properties in the entity are read-only. For example, if IsExternal==null, the FirstName, LastName, and Email fields should be rendered as TextBoxes. If IsExternal!=null, the 3 properties should be rendered in Label controls.
View 2 RepliesDropdownlist Validation In Using Required Field Validator?
Mar 15, 2011I have Dropdownlist whose value field and text field are bind at runtime. it has --select-- as first item with a value of '0' and the rest of the values are bind at runtime.
I have given validaton group for both the control and the validator as "g1" and Intialvalue=0
But still the page is posting back even if I select '--select--' option.
[Code]....
C# - AutoPostBack="true" Doesn't Work For DropDownList With DataSource?
Aug 31, 2010I have following *.aspx page
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Admin_Test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
[code]....
When I change the value in dropdownList (in browser), it does PostBack, but it selects the first item of list after PostBack - it doesn't save my value.
GetAllDepartments(isDeleted) is a stored procedure, it returns a List of objects with two properties - FieldKey and Name.
Mobiles :: Dropdownlist AutoPostBack="true" NOT Firing In IPhone?
Mar 17, 2011have a ASP.NET page for mobile view.On that page I have this part:
[Code]....
While testing this on normal computer using IE7 IE8 it fires the AutoPostBack Control.BUT TESTING IN IPHONE THIS DOES NOT FIRES....ALSO THE DISPLAY IS WIERD BECAUSE A SEPARATE BOX APPEARS AT THE BOTTOM TO SELECT THE LIST.
AJAX :: Update Panel With DropDownList With AutoPostBack="True" Dont Want To Postback It?
May 13, 2010IAm using ASP.NET Ajax.
Iam having a Update Panel with DropDownList with AutoPostBack="True"
I dont want to postback it, but it going postback, i dont want AutoPostBack="false"
.
Here my code:
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering ="true" >
</asp:ScriptManager>
<br />
<br />
<div>
</div>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack ="true" OnSelectedIndexChanged ="DropDownList1_SelectedIndexChanged" >
<asp:ListItem Value="0">----Select----</asp:ListItem>
<asp:ListItem Value="101">General Admin</asp:ListItem>
<asp:ListItem Value="102">Admin Assistant</asp:ListItem>
<asp:ListItem Value="103">Software</asp:ListItem>
<asp:ListItem Value="104">Recruiting</asp:ListItem>
</asp:DropDownList>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode ="Conditional" >
<ContentTemplate >
<asp:DropDownList
ID="DropDownList2" runat="server">
<asp:ListItem Value="0">----Select----</asp:ListItem>
<asp:ListItem></asp:ListItem>
</asp:DropDownList>
</ContentTemplate>
<Triggers >
<asp:AsyncPostBackTrigger ControlID ="DropDownList1" EventName ="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
</form>
Web Forms :: Is Using Both A Required Field Validator And A Compare Validator
Mar 1, 2010When it comes to field validation, when I use a Compare Validator to make sure a date is a date or a numeric field has a number, I must also use a Required Field Validator to make sure there is something actually enetered. In other words, the Compare Validator allows a blank value even though a blank is not a date or number or whatever.
Is using both a Required Field Validator and a Compare Validator the way to do this or is there some way to make the Compare Validator also require input of some kind?
Forms Data Controls :: Chackbox In Grid Disappears After Autopostback?
Jun 15, 2010I have a Gridview control with a panel inside a template column and I dynamically add a checkbox control through code to the panel and the checkbox has autopost set. My problem is when I click the checkbox it dissappears on autopost back. I have tried to recreate the control again on the event OnDataBound but when I cast the sender as checkbox I get nothing. How can I not loose my checkbox on postback and why is (Checkbox)sender return nothing.
View 6 RepliesWeb Forms :: Checkboxlist With AutoPostBack Set To True?
Jun 29, 2010I 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]....
Web Forms :: AutoPostback / True Not Rendering Onchange?
Mar 22, 2011I've got a server control that renders out a series of dropdownlist and a checkbox that all have autopostback set to true. When the control renders the onchange event binding is not written out!
Controls are defined as protected, named and added to the controls collection in OnInit, and rendered via RenderControl(writer). Page.requiresPostback is also set.
ANy ideas why this might be? I'm scratching my head.
/* chopped version of the code in question */
[Code]....
AJAX :: Modal Popup Disappears At Autopostback?
Jan 11, 2011here is my code
<asp:LinkButton ID="changeStatusLinkButton" runat="server" Text="Change status" />
<ajaxToolkit:ConfirmButtonExtender ID="cofirmButtonExtender" runat="server"
TargetControlID="changeStatusLinkButton"
DisplayModalPopupID="modalPopupExtender" ConfirmText="" Enabled="True" />
<ajaxToolkit:ModalPopupExtender ID="modalPopupExtender" runat="server"
[Code]....
and when I select something in my statusDropDownList, (it has AutoPostBack="true") and my modal popup disappears.
Web Forms :: Error On Invalid Value In Dropdown With Autopostback True
Feb 3, 2011I 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 RepliesWeb Forms :: Content Editor Disappear When Autopostback = True
Apr 29, 2010i have some question about the autopostback. when i set a drop down menu to autopostback to true, the content editor in the same formview is disappear..
View 1 RepliesWeb Forms :: PostBackOptions In .NET/ The Autopostback Property Is Not Functioning (for True Or False)
May 27, 2010In the postback option class, the autopostback property is not functioning (for true or false) to forcibly set the the post back event on web page load as defined at the MSDN Url http://msdn.microsoft.com/en-us/library/system.web.ui.postbackoptions.aspx
A client side validation retrieves the GetPostBackEvent reference successully but fails to to load the page as a forced post back event. The options being set are a) ActionURL, Autpostback , RequiresJavaScriptProtocol and perform validation.
AJAX :: Slider And Autopostback=true ?
Sep 23, 2010I have three AJAX sliders and each has a:
<asp:AsyncPostBackTrigger ControlID="Slider1" EventName="TextChanged" />
<asp:AsyncPostBackTrigger ControlID="Slider2" EventName="TextChanged" />
<asp:AsyncPostBackTrigger ControlID="Slider3" EventName="TextChanged" />
When I do a TextChanged event on slider1 (by dragging the slider, changing the value), the protected void Slider1_TextChanged(object sender, EventArgs e) event FIRES, however, the TWO other sliders, protected void Slider2_TextChange, and protected void
Slider3_TextChange also FIRES. What gives? why do they fire when I am physically only sliding the slider1 across. The two other sliders values did not change on the webform, yet the event fired.
In order for the event to fire for slider1, I had to insert "Autopostback=true" in the <asp:TextBox ID="Slider1" autopostback="true" OnTextChanged="Slider1_TextChanged">. For <asp:TextBox2> and <asp:Textbox3> I did not put the autopostback event for now.
TextBox And Calendar Extender When Using AutoPostBack=true Never Fires?
Jan 30, 2010I have the following sample code
[Code]....
[Code]....
When I place a value in TextBox1 and then click inside TextBox3 (which is there to have a place to go to get out of TextBox1 and TextBox2) the value from TextBox1 remains and is displayed in the MessageBox.Show correctly.
When I pick a value from the drop down calendar extender in TextBox2 for a brief micro-second the value from the calendar displays in TextBox2 and then the MessageBox.Show displays and the value in TextBox2 returns back to the orginally set value. The MessageBox.Show shows the orginally set value.
For TextBox2 if I set AutoPostBack=false then the TextBox2 works correctly and keeps the date picked from the calendar extender but the ontextchanged="TextBox2_TextChanged" never fires.
C# - ItextSharp: Table Disappears When Added To Paragraph With KeepTogether=true
Jan 28, 2011I am exporting some data to a PDF and I have been using iTextSharp with a lot of success, but I just hit a wall.
I have a group of information I need to keep on a single page. This information includes a handful of other Paragraph objects and tables. I can add 3 Paragraphs to another parent Paragraph and set that parent's KeepTogether property to true and everything works great.
When I add a PdfPTable to the Paragraph with KeepTogether set to true, the table disappears. No Exceptions or error messages, the table just disappears.
Any clue as to what is happening? Is there a work around? Should I be coding differently, like is there a better parent control than Paragraph to keep text and tables together on one page?
Enable Textbox When Radiobuttonlist Is Selected Yes In Using Jquery Without Using Autopostback=true?
Jun 6, 2010![<asp:RadioButtonList ID="RdoBtnHasNotified" runat="server" RepeatDirection="Horizontal" AutoPostBack="True" OnSelectedIndexChanged="RdoBtnHasNotified_SelectedIndexChanged">
<asp:ListItem Value="1">Yes</asp:ListItem>
[code]...
AJAX :: Cascading Dropdown Not Posting Back Even Though Autopostback=true?
Oct 7, 2010I have the following code:
.aspx
<asp:DropDownList ID="ddlCountries" AutoPostBack="true" runat="server">
</asp:DropDownList>
[code]...