i have 2 webpages Default.aspx and Default2.aspx,
once the user enters the data in Default.aspx ,
Default.aspx redirects the user to Default2.aspx with Request.QueryString,
for some reason im getting
txtUserId.Text does not exists in the current context Default.aspx.cs
Default.aspx:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>QueryString Example in asp.net</title>
</head>
<body>
<form id="form1" runat="server">
<div><b>QueryString Example</b></div><br />
<div>
<table>
<tr>
<td><b>UserId:</b></td>
<td><asp:TextBox ID="txtUserId" runat="server"/></td>
</tr>
<tr>
<td><b>UserName:</b></td>
<td><asp:TextBox ID="txtUserName" runat="server"/></td>
</tr>
<tr>
<td></td>
<td><asp:Button ID="btnSend" Text="Send Values" runat="server" onclick="btnSend_Click"/></td>
</tr>
</table>
</div>
</form>
</body>
</html>
Default.aspx.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm3 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSend_Click(object sender, EventArgs e)
{
Response.Redirect("Default2.aspx?UserId=" + txtUserId.Text + "&UserName=" + txtUserName.Text);
}
}
}
Default2.aspx:
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>QueryString Example in asp.net</title>
</head>
<body>
<form id="form1" runat="server">
<div><b>QueryString parameter Values in Default2.aspx Page</b></div><br />
<div><b>UserId:</b><asp:Label ID="lblUserId" runat="server"/></div><br />
<div><b>UserName:</b><asp:Label ID="lblUserName" runat="server"/></div>
</form>
</body>
</html>
Default2.aspx.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm4 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
lblUserId.Text = Request.QueryString["UserId"];
lblUserName.Text = Request.QueryString["UserName"];
}
}
}
}
You need to make sure that your .aspx file code behind is match with your page like this:
<%# Page Language="C#" CodeBehind="WebForm2.aspx.cs" Inherits="yournamespace.WebForm2" .... %>
and your code behind class should match the CodeBehind property:
public partial class WebForm2 : System.Web.UI.Page
{
...
In the above example CodeBehind="WebForm2.aspx.cs" is pointing to class WebForm2
Related
I don't know how to get usercontrol's function GetValue(), I always get Error code CS1061.
First I can't get usercontrol ID testControl.
I have found lots example, but almost example can use like my code.
I don't know what's wrong about it.
This is all my code.
User Control Part
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="testControl.ascx.cs" Inherits="MyWeb.UserControl.testControl" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<style type="text/css">
.center {
text-align: center;
}
</style>
<asp:UpdatePanel ID="upUserControl" runat="server">
<ContentTemplate>
<table>
<thead>
<tr>
<td colspan="4">
<div class="center">
<asp:Label ID="lblTitle" runat="server" Text="查詢"></asp:Label>
</div>
</td>
</tr>
</thead>
<tbody>
<tr>
<td><asp:Label ID="lblName" runat="server" Text="姓名"></asp:Label></td>
<td><asp:TextBox ID="txtName" MaxLength="10" runat="server"></asp:TextBox></td>
<td><asp:Label ID="lblIdentify" runat="server" Text="身分證字號/統編:"></asp:Label></td>
<td><asp:TextBox ID="txtIdentify" MaxLength="10" runat="server"></asp:TextBox></td>
<td><asp:Button ID="btnQuery" runat="server" Text="查詢" OnClick="btnQuery_Click"/></td>
</tr>
</tbody>
</table>
</ContentTemplate>
</asp:UpdatePanel>
Code Behind of User Control
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace MyWeb.UserControl
{
public partial class testControl : System.Web.UI.UserControl
{
public string Name, Identify;
public string GetValue()
{
return txtName.Text + txtIdentify.Text;
}
protected void Page_Load(object sender, EventArgs e)
{ }
protected void btnQuery_Click(object sender, EventArgs e)
{ }
}
}
asp Page
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="testDynamicSelect.aspx.cs" Inherits="MyWeb.testDynamicSelect" %>
<%# Register Src="~/UserControl/testControl.ascx" TagPrefix="ucTest" TagName="ctrl" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<ucTest:ctrl runat="server" ID="testControl" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</asp:Content>
Code Behind of asp Page
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace MyWeb
{
public partial class testDynamicSelect : Page
{
protected void Page_Load(object sender, EventArgs e)
{ }
protected void Button1_Click(object sender, EventArgs e)
{
//I can't get testControl
Response.Write(testControl.GetValue());
}
}
}
I try to reference namespace MyWeb.UserControl, and it can work now.
In my company old project, it wouldn't reference just like my question.
But in my new project can't work. It have to reference namespace MyWeb.UserControl.
Who can tell me how it work?
using MyWeb.UserControl;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace MyWeb
{
public partial class testDynamicSelect : Page
{
testControl ucl = new testControl();
//UserControl ucl = new UserControl;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Console.WriteLine(cul.GetValue());
//Button1
}
}
}
Here is the following complete code
1) is the master page aspx
2) is the webform page aspx
3) is the webform C# file
The complete details as i suppose
now this ASP:content is already a form and also when i am adding form tag it is showing the page can have only form tage .Please can anyone help ?
Master page
<%# 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">
<asp:Label ID="eliblogin" runat="server" Text="Login"></asp:Label>
</form>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</body>
</html>
masterpage.cs file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class MasterPage : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
Page.LoadComplete += new EventHandler(set_button);
}
protected void eliblogout_Click(object sender, EventArgs e)
{
var user = Context.User.Identity;
//authentication manager
var authenticationManager = HttpContext.Current.GetOwinContext().Authentication;
//logout
authenticationManager.SignOut();
Response.Redirect("~/Index.aspx");
}
private void set_button(Object sender,EventArgs e)
{
var user = Context.User.Identity;
if (user.Name!=null && user.IsAuthenticated)
{
try
{
//Username.Text = user.Name;
eliblogin.Visible = true;
eliblogin.Text = "yes man you did it";
// eliblogout.Visible = true;
}
catch (Exception ex)
{
//Username.Text = ex.ToString();
}
}
else
{
// Username.Text = "Hello Guest";
eliblogin.Visible = true;
// eliblogout.Visible = false;
}
}
}
Login.aspx
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Pages_Account_Login" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:Label ID="liStatus" runat="server"></asp:Label>
<br />
<br />
<asp:Label ID="Label1" runat="server" Text="username"></asp:Label><br />
<br />
<asp:TextBox ID="txtUsername" runat="server"></asp:TextBox>
<br />
<asp:Label ID="Label2" runat="server" Text="Password"></asp:Label><br />
<br />
<asp:TextBox ID="txtPassword" runat="server" TextMode="Password"> </asp:TextBox>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Login" OnClick="Button1_Click" />
</asp:Content>
login.aspx.cs file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;
using Microsoft.Owin.Security;
public partial class Pages_Account_Login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
//User Store
UserStore<IdentityUser> userStore = new UserStore<IdentityUser>();
userStore.Context.Database.Connection.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["elibraryConnectionString"].ConnectionString;
//User Manager
UserManager<IdentityUser> manager = new UserManager<IdentityUser>(userStore);
//Create a new User
var user = manager.Find(txtUsername.Text,txtPassword.Text);
if (user!=null)
{
try
{
//Create user Object
//Database will be created Automatically
var authenticationManager = HttpContext.Current.GetOwinContext().Authentication;
var userIdentity = manager.CreateIdentity(user,DefaultAuthenticationTypes.ApplicationCookie);
authenticationManager.SignIn(new AuthenticationProperties
{
IsPersistent=false
},userIdentity);
}
catch (Exception ex)
{
liStatus.Text = ex.ToString();
}
}
else
{
liStatus.Text = "invalid username or password";
}
}
catch (Exception ex)
{
liStatus.Text = ex.ToString();
}
}
}
You should move
<form id="form1" runat="server">
<asp:Label ID="eliblogin" runat="server" Text="Login"></asp:Label>
</form>
from master page to login.aspx page and place all asp content of login page into this form tag.
I'm writing an admin page where I have a textbox for user name and a refresh button which shows user details when clicked. Among other controls, I have a 'remove user' button to delete the user. I have javascript code to get confirmation before attempting this.
Because I do not want this Remove User button to have submit behavior, I have set UseSubmitBehavior=False. However, this caused the server side event to not get fired. So I wrote a small client side function to explicitly call __doPostBack.
The final code works, but only on pages that are not based off of a master page or nested master pages. Sadly all my web pages are based off of master pages.
Wondering if I'm missing something or if there is a way around? I've just started asp.net so please excuse any obvious mistakes.
Many thanks in advance.
Code Sample:
Following code works (webform with no master page)
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm_with_NoMasterPage.aspx.cs" Inherits="WebApplication1.WebForm_with_NoMasterPage" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<script type="text/javascript">
function GetConfirmation(btn, msg) {
if (confirm(msg)) {
__doPostBack(btn.id, '');
return true;
}
else {
return false;
}
}
</script>
<asp:Button ID="btnRemoveUser" runat="server" Text="Remove User" OnClick="btnRemoveUser_Click"
OnClientClick="return GetConfirmation(btnRemoveUser, 'Really remove?');"
UseSubmitBehavior="false"
Height="37px" Width="230px" />
</div>
</form>
</body>
</html>
code behind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm_with_NoMasterPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnRemoveUser_Click(object sender, EventArgs e)
{
// put a breakpoint here and see if it is hit.
int x = 0;
}
}
}
Following does not work (same fragment but in a Webform based on masterpage):
<%# Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="WebForm_WITH_MasterPage.aspx.cs" Inherits="WebApplication1.WebForm_WITH_MasterPage" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="FeaturedContent" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="MainContent" runat="server">
<script type="text/javascript">
function GetConfirmation(btn, msg) {
if (confirm(msg)) {
__doPostBack(btn.id, '');
return true;
}
else {
return false;
}
}
</script>
<asp:Button ID="btnRemoveUser" runat="server" Text="Remove User" OnClick="btnRemoveUser_Click"
OnClientClick="return GetConfirmation(btnRemoveUser, 'Really remove?');"
UseSubmitBehavior="false"
Height="37px" Width="230px" />
</asp:Content>
Code behind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm_WITH_MasterPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnRemoveUser_Click(object sender, EventArgs e)
{
// put a breakpoint here and see if it is hit
int z = 0;
}
}
}
I have 2 themes that i want to use on site, and they are settled in Themes Folder-> theme1 and theme2 , in theme1 and theme2 i have one .css file.
So how will I connect these .css files to two buttons and when i click on button1 i want to theme1.css activates and for theme2.
If you need more informations about problem ask.
thanks
In the Page_PreInit or before insert the code
{
this.Theme = "myTheme"
}
I have created a sample application in asp.net check out this,and let me know if there is some doubt.
Updated
<%# Page Language="C#" AutoEventWireup="true" CodeFile="ProfilePage.aspx.cs" Inherits="ProfilePage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="test" Text="Stackoverflow" runat="server"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="Theme1" OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="Theme2" OnClick="Button2_Click" />
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class ProfilePage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Page_PreInit(object sender, EventArgs e)
{
switch (Request.QueryString["theme"])
{
case "Blue":
Page.Theme = "Blue";
break;
case "Red":
Page.Theme = "Red";
break;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("ProfilePage.aspx?theme=Red");
}
protected void Button2_Click(object sender, EventArgs e)
{
Response.Redirect("ProfilePage.aspx?theme=Blue");
}
}
i am calling two server side function with the help of page method but nothing happen.
here i am giving my code. so please tell me what mistake i made,
my aspx code
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
</asp:ScriptManager>
<div>
Test
<br />
</div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<br />
<asp:Button ID="btnSetvwState" runat="server" Text="Set Session Val" OnClientClick="SetSessionVal;return false;" />
<asp:Button ID="btnGetVwState" runat="server" Text="Get Session Val" OnClientClick="GetSessionVal;return false;"/>
<script language="javascript">
function preview() {
alert($get('TextBox1').value);
PageMethods.GetMessage("Hi", "Joy", onSuccess)
return false;
}
function onSuccess(res) {
alert(res);
}
function GetSessionVal() {
PageMethods.GetViewState(onSuccess)
return false;
}
function SetSessionVal() {
alert("pp");
PageMethods.SetViewState("Hi", "Tridip", onSuccess)
return false;
}
</script>
</form>
</body>
</html>
my server side code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
[System.Web.Services.WebMethod]
public static string GetMessage(string pr1,string pr2)
{
return pr1 + " " + pr2;
}
[System.Web.Services.WebMethod(EnableSession=true)]
public static void SetViewState()
{
HttpContext.Current.Session["data"] = "Hellp";
}
[System.Web.Services.WebMethod(EnableSession = true)]
public static string GetViewState()
{
return (String) HttpContext.Current.Session["data"] ;
}
}
}
please help me to catch the mistake. thanks
missing () here (SetSessionVal, GetSessionVal):
<asp:Button ID="btnSetvwState"
runat="server" Text="Set Session Val"
OnClientClick="SetSessionVal();return false;" />
<asp:Button ID="btnGetVwState"
runat="server" Text="Get Session Val"
OnClientClick="GetSessionVal();return false;"/>