Web Forms :: How To Control Onselectedindex Change Event Of Dropdownlist On Autopostback Is True
Jan 8, 2011
I 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...
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[Code]....
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Aug 31, 2010
I have following *.aspx page
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Mar 17, 2011
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[Code]....
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May 13, 2010
IAm using ASP.NET Ajax.
Iam having a Update Panel with DropDownList with AutoPostBack="True"
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.
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>
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Jun 29, 2010
I have a checkboxlist with autopostback set to true, the checkbox list inside a panel and together they are inside an update panel.
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"Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Specified argument was out of the range of valid values. "
this is my code:
[Code]....
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Mar 22, 2011
I'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!
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ANy ideas why this might be? I'm scratching my head.
/* chopped version of the code in question */
[Code]....
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Feb 3, 2011
I 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.
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Apr 29, 2010
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May 27, 2010
In 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
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Sep 23, 2010
I have three AJAX sliders and each has a:
<asp:AsyncPostBackTrigger ControlID="Slider1" EventName="TextChanged" />
<asp:AsyncPostBackTrigger ControlID="Slider2" EventName="TextChanged" />
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Feb 2, 2010
i am developing an application using ASP.NET with C#.net. in my application i have a gridview contains 3 fields.
1.description
2.unitprice
3.Regions
these three are template fields and last field i.e Regions is set to visible false.
code is
[Code]....
when the grid is binded,i am not displaying the regions field as that is set to visible false.
when i click the edit button i.e in RowEditing event of grid i have to show the Region field.
for that i had wrriten the code as
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when i run the application and when i click a perticular row of edit The region field is set to visible to all rows which are there in gridview.
my requirement is i have to show the region of perticular row in gridview which i have selected.
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Jan 30, 2010
I 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.
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Jun 6, 2010
![<asp:RadioButtonList ID="RdoBtnHasNotified" runat="server" RepeatDirection="Horizontal" AutoPostBack="True" OnSelectedIndexChanged="RdoBtnHasNotified_SelectedIndexChanged">
<asp:ListItem Value="1">Yes</asp:ListItem>
[code]...
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Oct 7, 2010
I have the following code:
.aspx
<asp:DropDownList ID="ddlCountries" AutoPostBack="true" runat="server">
</asp:DropDownList>
[code]...
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Aug 30, 2012
How to select next row of grid view on selected index change event on dropdownlist in gridview...
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Jun 3, 2010
I have an ASP.NET 3.5 web application in which i am using the ToolkitScriptManager as below:
<ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" EnablePageMethods="true" ScriptMode="Release"
LoadScriptsBeforeUI="false" runat="server" CombineScripts="false">
<CompositeScript>
<Scripts>
<asp:ScriptReference Path="~/JavaScript/jquery-1.4.1.min.js" />
<asp:ScriptReference Path="~/JavaScript/Validators.js" />
</Scripts>
</CompositeScript>
</ajaxToolkit:ToolkitScriptManager>
This works fine but from a performance standpoint this is not good as the pages are making a lot of requests to the webresources.axd and scriptresource.axd files. When I changed the CombineScripts property to true my ASP.NET AJAX control extenders are no longer working. What is the reason for this weired behavior and is there a fix for this?
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Mar 10, 2011
I understand I need to load my dynmaic control on every postback and preferrably in Page_Init(). But my dyanmic controls are loaded from a dropdownlist selectedindexchanged event handler. Now after any postback, my dynamic controls are gone. How would I force it to load on every postback ?
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Sep 15, 2010
I have a gridview that receives data based on selection from a primary dropdownlist object. Works.
Within the gridview, there is a dropdownlist whose selected index is based on the query from the primary dropdownlist. Works.
Problem.
How do I force the used to change whatever value that the dropdownlist contains after they make their initial selection from the primary dropdownlist; except the default value of "make a selection".
Gridview, contains a checkbox which drives whether a selected row is inserted into the data base. The databind in done using an ObjectDataSource on the presentation page, not in the code behind.
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Apr 27, 2016
When I select the item in 1st dropdownlist, values are fetched from database and want to display in second dropdownlist... but the autopostback is not working for the 1st dropdownlist..
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Oct 6, 2010
I have a nut for a manager who changed my form and added _top so that I could redirect a response to a parent window, anyway, I have two .net forms and now he tells me I can't do any posting back on my child window. I have lots of .Net event callbacks that use autopostback on this child window. He told me he believes I can do all the necessary event code through his Javascript client-side scripting that he loves so dearly. I don't think he knows .NET very well even though he acts like he does. the microsoft server coding world and without replacing every object in my child window (there are many) with html and resorting to an html page (God help me Bill Gates I'm coming to get you) is there anyway I can have my events (onselectedindexchanged onclick ... ie) to call javascript functions without an autopostback on any of my controls ?
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Jun 8, 2010
I am using ajax CascadingDropDown with DropDown List, I am having 2 Dropdown list based on that selection Gridview is displayed. It work perfectly
The problem is when i change the 2nd Dropdown list then both Dropdown list blinks and again load the values.
Below is the code
1st DropDownList
<asp:DropDownList
ID="drdBranch"
CssClass="aspDropDownList"
runat="server"
TabIndex="1"
AutoPostBack="true"
/>
<Ajax:CascadingDropDown
ID="CascadingDropDown1"
runat="server"
TargetControlID="drdBranch" ServiceMethod="GetBranchList"
ServicePath="GetDetail.asmx"
Category="Branch" PromptText="Select
Branch" PromptValue=""
LoadingText="Loading Branch...">
</Ajax:CascadingDropDown>
2nd DropDownList
<asp:DropDownList
ID="drdRM"
CssClass="aspDropDownList"
runat="server"
TabIndex="2"
AutoPostBack="true"
/>
<Ajax:CascadingDropDown
ID="CascadingDropDown2"
runat="server"
TargetControlID="drdRM" ServiceMethod="GetRMList"
ServicePath="GetDetail.asmx"
ParentControlID="drdBranch" Category="RM"
PromptText="Select RM"
LoadingText="Loading RM..."> </Ajax:CascadingDropDown>
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