Get MasterPage control value in Content Page using C# and VB.Net in ASP.Net

mannu

SOLVED CLOSED ACTIVE ANSWERED
User: mannu
Posted: on Mar 18, 2018 07:50 AM
Forum: ASP.Net AJAX
Answer: 1
Views: 12629

Hi,

AnyOne please give an example how to bind the count in masterpage span tag value or label value when content page ex:cliententrypage.aspx on submitting record the count in master page label is updated in c#.net

This is master page data

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>
 
<!DOCTYPE html>
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <asp:ContentPlaceHolder id="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
            <asp:Label ID="masterlabel" runat="server" Text=""></asp:Label>
        </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

this is content page data

<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ MasterType VirtualPath="~/MasterPage.master" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
     
     
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
 
</asp:Content>

this is content page code behind

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
 
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ((HtmlGenericControl)Master.FindControl("masterlabel")).InnerText = " fdf fgf gf";
         
    }

I am getting null reference exception in htmlgenericciontrol line.

please give a sample source code or link for reference

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kalpesh

0 3

Reply
ANSWER
User: kalpesh
Replied: on Mar 19, 2018 04:17 AM
Modified: on Mar 19, 2018 05:22 AM
Report

Refer the below sample code for your reference how to access the Label or span control to the child page. Master page

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        Label Count Value : &nbsp;&nbsp;<asp:Label ID="lblCount" runat="server" Text=""></asp:Label><br />
        <br />
        Span Count Value : &nbsp;&nbsp;<span id="sCount" runat="server"></span>
        <br />
        <br />
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

Child Page

HTML

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <asp:Button Text="btnIncrement" runat="server" OnClick="InCrement" />
</asp:Content>

public static int Count { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Count++;
        ((Label)this.Master.FindControl("lblCount")).Text = Count.ToString();
        ((HtmlGenericControl)this.Master.FindControl("sCount")).InnerHtml = Count.ToString();
    }
}


protected void InCrement(object sender, EventArgs e)
{
    Count++;
    ((Label)this.Master.FindControl("lblCount")).Text = Count.ToString();
    ((HtmlGenericControl)this.Master.FindControl("sCount")).InnerHtml = Count.ToString();
}

VB.Net

Public Shared Property Count As Integer

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Not Me.IsPostBack Then
        Count += 1
        (CType(Me.Master.FindControl("lblCount"), Label)).Text = Count.ToString()
        (CType(Me.Master.FindControl("sCount"), HtmlGenericControl)).InnerHtml = Count.ToString()
    End If
End Sub

Protected Sub InCrement(ByVal sender As Object, ByVal e As EventArgs)
    Count += 1
    (CType(Me.Master.FindControl("lblCount"), Label)).Text = Count.ToString()
    (CType(Me.Master.FindControl("sCount"), HtmlGenericControl)).InnerHtml = Count.ToString()
End Sub

Screenshot

I agree, here is the link: https://www.e-iceblue.com/Introduce/spire-office-for-net-free.html

Get MasterPage control value in Content Page using C# and VB.Net in ASP.Net

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