Y
ynanus
Hi,
I tried out the sample you provided. It only worked half way. I got
client-side popup message and server-side postback message "This is
server side code". But I failed to invoke server-side method
LinkButton1_Click and DropDownList1_SelectedIndexChanged.
Help is appreciated.
lucy
I tried out the sample you provided. It only worked half way. I got
client-side popup message and server-side postback message "This is
server side code". But I failed to invoke server-side method
LinkButton1_Click and DropDownList1_SelectedIndexChanged.
Help is appreciated.
lucy
Bassel Tabbara said:
Request.Form("__EVENTARGUMENT") & "]<br>")
End Sub
End Class
Please let me know if you have any questions regarding this.
Thanks,
Bassel Tabbara
Microsoft, ASP.NET
This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------
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| References: <#5HVgGO#[email protected]>
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| From: (e-mail address removed) (Bassel Tabbara [MSFT])
| Organization: Microsoft
| Date: Wed, 02 Apr 2003 22:23:34 GMT
| Subject: RE: How to fire an event when a DropDownList is clicked
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet
| Message-ID: <mP5nEaW#[email protected]>
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|
| Hello,
| I am half through what you are asking for. I found the event that you
were
| searching for. You can use the Click event of the DropDownList box
control.
| From this event you can call a function that is being sent by the server.
| You can do this by using the function Page.RegisterClientScriptBlock
| This allows ASP.NET server controls to emit client-side script blocks in
| the Page.
| The client-side script is emitted just after the opening tag of the Page
| object's <form runat= server> element.The script block is emitted as
| the object that renders the output is defined, so you must include both
| tags of the <script> element.
|
| For more information you can refer to the following MSDN article:
|
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
| frlrfSystemWebUIPageClassRegisterClientScriptBlockTopic.asp
|
| Moreover, you can generate Client-Side Script for Postback by using The
| GetPostBackEventReference. This method emits client-side script that
| initiates postback and also provides a reference to the control that
| initiated the postback event.
|
| For more information on this method refers to the following MSDN article:http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/htm
| l/cpcongeneratingclient-sidejavascriptforpostback.asp
|
| I included below a sample that will write client script from the server
| side code and catch the event of dropdown list box without changing
| the current selection.
|
| ===========
| default.aspx
| ===========
| <%@ Page language="c#" Codebehind="default.aspx.cs"
AutoEventWireup="false"
| Inherits="CustomerDemos._default" %>
| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
| <HTML>
| <HEAD>
| <title>default</title>
| <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
| <meta name="CODE_LANGUAGE" Content="C#">
| <meta name="vs_defaultClientScript" content="JavaScript">
| <meta name="vs_targetSchema"
| content="http://schemas.microsoft.com/intellisense/ie5">
|
| </HEAD>
| <body MS_POSITIONING="GridLayout">
| <form id="default" method="post" runat="server">
| <aspropDownList id="DropDownList1" onclick="myfunc()"
style="Z-INDEX:
| 101; LEFT: 275px; POSITION: absolute; TOP: 112px" runat="server">
| <asp:ListItem Value="One">One</asp:ListItem>
| <asp:ListItem Value="Two">Two</asp:ListItem>
| <asp:ListItem Value="Three">Three</asp:ListItem>
| <asp:ListItem Value="Four">Four</asp:ListItem>
| </asp
| </form>
| </body>
| </HTML>
|
|
| =============
| default.aspx.cs
| =============
| using System;
| using System.Collections;
| using System.ComponentModel;
| using System.Data;
| using System.Drawing;
| using System.Web;
| using System.Web.SessionState;
| using System.Web.UI;
| using System.Web.UI.WebControls;
| using System.Web.UI.HtmlControls;
|
| namespace CustomerDemos
| {
| /// <summary>
| /// Summary description for _default.
| /// </summary>
| public class _default : System.Web.UI.Page
| {
| protected System.Web.UI.WebControls.DropDownList DropDownList1;
|
| private void Page_Load(object sender, System.EventArgs e)
| {
|
| Page.RegisterClientScriptBlock("ClientScript","<script
| language=javascript>function myfunc(){ alert('hello again'); " +
| Page.GetPostBackEventReference(DropDownList1) + "}</script>");
|
|
| }
|
| #region Web Form Designer generated code
| override protected void OnInit(EventArgs e)
| {
| //
| // CODEGEN: This call is required by the ASP.NET Web Form Designer.
| //
| InitializeComponent();
| base.OnInit(e);
| }
|
| /// <summary>
| /// Required method for Designer support - do not modify
| /// the contents of this method with the code editor.
| /// </summary>
| private void InitializeComponent()
| {
| this.Load += new System.EventHandler(this.Page_Load);
|
| }
| #endregion
| }
| }
|
|
| I will dig more into how you can call from a client side scrict a server
| side method.
|
| Thanks,
| Bassel Tabbara
| Microsoft, ASP.NET
|
| This posting is provided "AS IS", with no warranties, and confers no
rights.
|
|
| --------------------
| | From: "SunshineGirl" <[email protected]>
| | Subject: How to fire an event when a DropDownList is clicked
| | Date: Tue, 1 Apr 2003 23:32:23 -0700
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| |
| | I would like to run a method when the user clicks the arrow to expand
the
| DropDownList, and does not necessarily change the selection. I know I
have
| to use the Attributes collection, but I'm not sure how to link the
| JavaScript code to the server-side method.
| | Thanks.
| |
|
|