ASP.NET

<br />
if (trim(document.getElementById("<%=txtHeading.ClientID%>").value)=="")<br />
{<br />
alert("Enter News Heading");<br />
}<br />
<br />
function trim(stringToTrim) {<br />
	return stringToTrim.replace(/^\s+|\s+$/g,"");<br />
}<br />

<br />
Dim str As String = ConfigurationSettings.AppSettings("UserType")<br />
<br />
   DropDownList1.DataSource = str.Split(",")<br />
<br />
   DropDownList1.DataBind()<br />

deepthy.p.m wrote:

I want to check textbox null in clild master page using javascript.

<br />
function val(cntrl)<br />
{<br />
if(document.getElementById(cntrl).value=="")<br />
{<br />
return false;<br />
}<br />
}<br />

deepthy.p.m wrote:

butSubmit.Attributes.Add("OnClick", "return val()");

<br />
btnsubmit.Attributes.Add("onclick", "return val('" + TextBox1.ClientID + "')")<br />

<br />
<uc9:controlbookdetail id="ID1" runat="server" properties....="" xmlns:uc9="#unknown" /><br />

nguyenhh wrote:

protected void btnSearch_Click(object sender, EventArgs e)
{
TextBox searchValue = (TextBox)Page.FindControl("searchValue");
Control searchType = Page.FindControl("searchType"); //never find this control
if (searchValue != null)
Response.Write(searchValue.Text);
else Response.Write("Bad request");
}

<%@ Import NameSpace="com.nangmoi" %> 
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Web" %>
<%@ Page Language="C#" MasterPageFile="~/MasterPageHome.master" Title="www.nangmoi.com" %>

<%@ Register Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
    Namespace="System.Web.UI.WebControls" TagPrefix="asp" %>
 <%@ Register src="Control/ControlFormBookSearch.ascx" tagname="ControlFormBookSearch" tagprefix="uc6" %> 
 
<script runat="server">  
    private BookManager objManager = new BookManager();    
    protected void Page_Load(object sender, EventArgs e)
    { 
        if (!IsPostBack){
            
            GridView1.DataSource = objManager.getAuthorByAll();
            GridView1.DataBind();                         
        }
    }
 
    protected void btnSearch_Click(object sender, EventArgs e)
    {
        //TextBox searchValue = (TextBox)Page.FindControl("searchValue");
        TextBox searchValue = (TextBox)ControlFormBookSearch1.FindControl("searchValue");
        
        if (searchValue != null)
            Response.Write(searchValue.Text);
        else Response.Write("Bad request");  
    }
</script>
<uc6:ControlFormBookSearch ID="ControlFormBookSearch1" runat="server" /> &nbsp;

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ControlFormBookSearch.ascx.cs" Inherits="Control_ControlFormBookSearch" %>
   
<table style="padding:0; border:solid 0px;">
<tr valign="middle"> 
<td style="vertical-align:top;border-bottom:solid 0px">
Keyword:&nbsp;<asp:TextBox ID="searchValue" runat="server" value="test" />&nbsp;
</td> 
</tr> 
</table> 

using System;
using System.Collections;
using System.Configuration;
using System.Data; 
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts; 

public partial class Control_ControlFormBookSearch : System.Web.UI.UserControl
{ 
    protected void Page_Load(object sender, EventArgs e)
    {
         
    }
    //How do i do this the correct way?? do i create properties like this?
    //then how do i use it from webform?
    public SearchValue{
         get {return searchValue.Text;}
         set (searchValue.Text = value;}
    }
}

<![CDATA[<%@ Control Language="C#" AutoEventWireup="true" CodeFile="usc1.ascx.cs" Inherits="UI_usc1" %>]]>

<asp:panel id="Panel1" runat="server" xmlns:asp="#unknown">
    <asp:textbox id="TextBox1" runat="server"></asp:textbox>    
</asp:panel>

<![CDATA[<%@ Page Language="C#" %>]]>
<![CDATA[<%@ Register Src="~/UI/usc1.ascx" TagName="Communication" TagPrefix="Samplectrl" %>]]>


<script runat="server">

    protected void btn_Click(object sender, EventArgs e)
    {
        ((TextBox)usrctrl1.FindControl("TextBox1")).Text = "adasd";
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <samplectrl:communication id="usrctrl1" runat="server" xmlns:samplectrl="#unknown" />
        <asp:button id="btn" runat="server" text="click find and write" onclick="btn_Click" xmlns:asp="#unknown" />        
    </div>
    </form>
</body>
</html>

TextBox searchValue = (TextBox)Page.FindControl("searchValue");

TextBox searchValue = (TextBox)ControlFormBookSearch1.FindControl("searchValue");