Web Forms :: Show/Hide Image On Dropdownlist SelectedIndexChanged?
Mar 12, 2010
Basically I have a dropdownlist (ddlSystem) and an AJAX update panel. Inside the update panel I have an asp:GridView (gvSystemSpecs) and an asp:Image (imgLoad).
For triggers on the update panel I have:
[Code]....
When the user changes ddlSystem it makes a service call to pull back a bunch of data and populate the gridview.
I want to be able to show a loading image (imgLoad) when ddlSystem is changed. Once the function to pull data and populate the gridview is complete I need to hide the loading image.
I think I'll need to use some JavaScript, but what ever I try doesn't work and I don't know if the update panel has anything to do with it...
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This is my Code
My query is if i select Other in dropdownlist i want visible textbox..
how to i do it..
<asp:GridView ID="TypeFruit" runat="server">
<Columns>
<asp:TemplateField HeaderText="Type" >
<ItemTemplate>
<asp:DropDownList ID="ddlfruit" runat="server" >
<asp:ListItem Value="0">Select</asp:ListItem>
<asp:ListItem Value="1">Fruit</asp:ListItem>
<asp:ListItem Value="2">Other</asp:ListItem>
</asp:DropDownList>
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</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
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May 7, 2015
in above code works fine if every textbox disable/enable depending upon the dropdown list selected value, in my query i want effects only one textbox
in my query i have gridview with 1 dropdown list ddl, two texboxes tb1 and tb2.
tb1 is in visible false..
tb2 is in visible true.
if i select dropdown selected value as "other" tb1 column should be visible and ddl selected value not effected to another textbox tb2.
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Dec 14, 2013
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id Product behcode
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ALTER procedure [dbo].[storeinfo1]
@Behcode nvarchar(10)
as
begin
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In my query i have 1 gridview..
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textbox is in visible=false state..
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[Code]....
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[Code]....
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I have several DropDownLists which get data from database, that is,
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[Code]....
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[Code]....
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[Code]....
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asp:DropDownList
ID="ddlPrescriptionCodeGroup"
runat="server"
AppendDataBoundItems="True"
AutoPostBack="True"
DataSourceID="PrescriptionCodeGroupDataSource"
DataTextField="CodeGroupDescription"
DataValueField="PrescriptionCodeGroupID"
onselectedindexchanged="ddlPrescriptionCodeGroup_SelectedIndexChanged">
<asp:ListItem
Text="--Please Select--"
Value="-1"></asp:ListItem>
<
</asp:DropDownList>
<asp:SqlDataSource
ID="PrescriptionCodeGroupDataSource"
runat="server"
ConnectionString="<%$ ConnectionStrings:RadiotherapyConnectionString %>"
SelectCommand="SELECT [PrescriptionCodeGroupID], [CodeGroupDescription] FROM [PrescriptionCodeGroup] WHERE (([Archived]
= @Archived) AND ([OrganisationID] = @OrganisationID))">
<SelectParameters>
<asp:Parameter
DefaultValue="False"
Name="Archived"
Type="Boolean"
/>
<asp:SessionParameter
Name="OrganisationID"
SessionField="OrganisationID"
Type="Int32"
/>
</SelectParameters>
</asp:SqlDataSource>
<asp:DropDownList
ID="ddlPrescriptionCode"
AutoPostBack="True"
runat="server"
AppendDataBoundItems="True"
onselectedindexchanged="ddlPrescriptionCode_SelectedIndexChanged"
DataSourceID="PrescriptionCodeDataSource"
DataTextField="CodeDescription"
DataValueField="PrescriptionCodeID"
>
<asp:ListItem
Text="--Please Select--"
Value="-1"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource
ID="PrescriptionCodeDataSource"
runat="server"
ConnectionString="<%$ ConnectionStrings:SystemConnectionString %>"
SelectCommand="SELECT [PrescriptionCodeID], [CodeDescription] FROM [PrescriptionCode] WHERE (([Archived] = @Archived)
AND ([PrescriptionCodeGroupID] = @PrescriptionCodeGroupID))">
<SelectParameters>
<asp:Parameter
DefaultValue="False"
Name="Archived"
Type="Boolean"
/>
<asp:ControlParameter
ControlID="ddlPrescriptionCodeGroup"
Name="PrescriptionCodeGroupID"
PropertyName="SelectedValue"
Type="Int32"
/>
</SelectParameters>
</asp:SqlDataSource>
When I select from the first dropdown I want to populate the second. However, this is not happening. The postback is happening, but the SelectedIndexChanged handler isn't being called (I have a breakpoint which isn't being hit). The user controls are created dynamically and put into a PlaceHolder which itself is within an AJAX Updatepanel, with ChildrenAsTriggers set to true.
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Mar 4, 2010
i have a image control that show Captcha...
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i think image can't find server folder address and always show first produced image!!!
see code:
[Code]....
where is the problem?
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Apr 28, 2010
I have in my MasterPage a DropDownList that appears in all my Pages. I want it to run a specific code when user select another item in the list, but the event SelectedIndexChanged in the MasterPage doesn't work. How can I do to get this event working?
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Jul 10, 2010
on SelectedIndexChanged event handling of DropDownList in ItemTemplate of ListView. I put OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" in mark up, with code behind, but only to get Compiler Error Message: BC30456: 'DropDownList1_SelectedIndexChanged' is not a member of 'ASP.webform1_aspx'. How do I make it a member? When I do not put OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" in mark up, BC30456 does not pop up, but nothing happens when dropdownlist selected item is changed.
[Code]....
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Jan 12, 2011
I am adjusting my DropDownList on my MASTERPAGE to point to resourcefiles - like this:
<asp:DropDownList runat="server" ID="Language1" AutoPostBack="true" OnSelectedIndexChanged="Language1_SelectedIndexChanged">
<asp:ListItem value="0" Text="<%$ Resources:SiteMapLocalizations, DropDownSelect1%>"></asp:ListItem>
<asp:ListItem Value="0" Text="<%$ Resources:SiteMapLocalizations, DropDownSelect2%>"></asp:ListItem>
<asp:ListItem Value="0" Text="<%$ Resources:SiteMapLocalizations, DropDownSelect3%>"></asp:ListItem>
</asp:DropDownList>
Problem now is that my SelectedIndexChanged has broken its funktionality in MasterPage.master.vb:
Protected Sub Language1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
Dim cookie As New HttpCookie("SelLang")
cookie.Value = Language1.SelectedValue
Response.SetCookie(cookie)
Response.Redirect(Request.UrlReferrer.AbsoluteUri)
this is for the redirecting to the referrer page
End Sub
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May 7, 2015
I have a gridview and dropdownlist, let say the content of dropdownlist is YEAR and the content of gridview is Name and Year. Now for everytime I change the Value of dropdownlist the content of gridview will change but it will not load the page
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Oct 27, 2010
In our asp.net web application we load the dropdown list boxes in the page load. We than set the SelectedValue of each dropdown list box to an object from session. We have event handlers for many of the SelectedIndexChanged events of the drop down lists boxes, but these do not get executed when we set the selected value programmatically.
Someone else mentioned this is by design, and only when a user manually changes the drop down list selected index, will the event get raised.
I would think this is a common scenario of wanting the selectedindexchanged event handled when setting the selectedvalue/selectedindex/listitem's selected property, of a DropDownList. What is the suggested way to handle this? Is there a significant drawback of creating a custom control inherited from DropDownList that has the functionality of raising this event when changing the SelectedIndex or SelectedValue?
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