I have a textbox in my webpage and I want to fire as soon User clicks or enter something on this textbox. Code is working but it is firing when an User hits Enter button. I want it to fire when user types their 1st character. Which event is app for this?
This is my mockup code:
<asp:TextBox ID="txtAgentName" runat="server" OnTextChanged = "txtAgentName_TextChanged"></asp:TextBox>
But when I am running this webpage it is showing me this err:
CS0123: No overload for 'txtAgentName_TextChanged' matches delegate 'System.EventHandler'
I have this on my code behind:
protected virtual void txtAgentName_TextChanged(object sender, EventArgs e)
{
}
Made a breakpoint in in here, and seems like it is firing when I am hitting Enter button. I want to fire when user enter 1st character inside that textbox.
What I am doing wrong here?
your event handler must have this signature
protected void txtAgentName_TextChanged(object sender, EventArgs e)
{
...
}
does it?
<%# Page Language="C#" %>
<script runat="server">
protected void txtSearch_TextChanged(object sender, EventArgs e)
{
lblSearchResults.Text = "Search for: " + txtSearch.Text;
}
</script>
<html>
<head>
<title>TextBox AutoPostBack</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblSearch"
Text="Search:"
Runat="server" />
<asp:TextBox
id="txtSearch"
AutoPostBack="true"
OnTextChanged="txtSearch_TextChanged"
Runat="server" />
<hr />
<asp:Label
id="lblSearchResults"
Runat="server" />
</div>
</form>
</body>
</html>
Use javascript's TextBox1.Attributes.Add("OnKeyPress", "GetKeyPress()") and then postback if you wish.
Related
I've had a look at lots of posts and I feel like I'm going crazy as nothing I've tried seems to work. I simply want to click a button and retrieve the value of a textbox.
I'm using web forms with a site.master so not sure if this could be affecting the problem, but most of the solutions I've seen don't appear to be using a site.master.
I'm not binding the textbox, initially I just wanted to create a contact form.
<%# Page Title="About" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="About.aspx.cs" Inherits="Blackburn_Pulse.About" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<script>$("#menuAbout").addClass("navi-active");</script>
<div class="contentBody">
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="tb_Test" EnableViewState="true" CausesValidation="false" runat="server"></asp:TextBox>
<asp:LinkButton ID="btn_Test" runat="server" OnClick="btn_Test_Click" Text="send test" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btn_Test" EventName="click" />
</Triggers>
</asp:UpdatePanel>
</div>
</asp:Content>
public partial class About : Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.Page.Master.EnableViewState = true;
if (IsPostBack)
{
var test_var = tb_Test.Text; //returning empty
}
}
protected void btn_Test_Click(object sender, EventArgs e)
{
var test_var = tb_Test.Text; //returning empty
}
}
UPDATE:
site.master.cs
public partial class SiteMaster : MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindCategories();
}
}
protected void BindCategories()
{
Categories Categories = new Categories();
rpt_categories.DataSource = Categories.Get_Categories();
rpt_categories.DataBind();
}
protected void lb_newsCat_Command1(object sender, CommandEventArgs e)
{
switch (e.CommandName)
{
case "naviTo":
//Redirect user to selected category
Response.Redirect("~/" + e.CommandArgument.ToString());
break;
}
}
}
I'm converting a PHP website to an ASP.net website. Turns out I had another HTML form tag on a search box that I haven't started working on yet.
Unfortunately the debugger doesn't throw an error if you have another form tag so anybody else who's just spent hours of their lives searching, double check you don't have more than 1 form tag!
In my site.master.aspx file, I had a search box as follows:
<form method="post" action="?">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-primary my-2 my-sm-0" type="submit">Search</button>
</form>
Once I took the extra form tag out, everything worked fine.
iam writing code for button onclient event with js to print the webpage and onclick event for generating pdf and downloading it ..both must be done in a single action..
but when i cancel print which i onclient click event then oncick event is firing .
<script type="text/javascript">
function PrintPage()
{
window.print();
return true;
}
<asp:Button ID="Button3" runat="server" Text="PTPDF" UseSubmitBehavior="false" OnClick="Button3_Click1" OnClientClick ="javascript:PrintPage();" />
</div>
protected void Button3_Click1(object sender, EventArgs e)
{//here is the code for pdf generation,
this code must get fired automatically after onclient click event without users action}
Below code works perfectly on my end and illustrateson how both OnClick and OnClientClick works at a same time-
ASPX -
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Click.aspx.cs" Inherits="Click" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script language="javascript" type="text/javascript">
function confirmthis()
{
document.getElementById('TextBox2').value = 'onclient works';
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" OnClientClick="return confirmthis();" Text="Click Me" /></div>
</div>
</form>
</body>
</html>
Inline code -
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Click : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Text = "OnClick works";
}
}
Please paste the above code at your end and let me know if it still doesn't work.
Thanks!!
I've got a ValidationSummary and SuccessLabel in the MasterPage
When the SuccessLabel has detail in it, and then the ValidationSummary then fails validation I want it to hide the SuccessLabel and only show the ValidationSummary.
<div id="ApplicationStatus" class="ValidationSummaryContainer">
<asp:Label ID="StatusLabel" CssClass="SuccessSummary" runat="server"
Visible="false"></asp:Label>
<asp:Label ID="WarningLabel" CssClass="WarningSummary" runat="server"
Visible="false"></asp:Label>
<asp:ValidationSummary ID="ErrorValidationSummary" runat="server"
CssClass="ValidationSummary" DisplayMode="List" />
<asp:CustomValidator ID="ErrorCustomValidator" runat="server"></asp:CustomValidator>
</div>
<div id="ApplicationContent" class="ApplicationContentContainer">
<asp:ContentPlaceHolder ID="MainContent" runat="server">
</asp:ContentPlaceHolder>
</div>
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
StatusLabel.Text = "Successfully loaded record";
}
}
<asp:Content ID="Content1" ContentPlaceHolderID="MainContentPlaceHolder" runat="server">
<asp:Textbox ID = "Text1" runat="server"/>
<asp:RequiredFieldValidator id="InputTextBoxRequiredFieldValidator" runat="server"
ControlToValidate="Text1" Visible="false" CssClass="InlineNoWrap" Enabled="true">
</asp:RequiredFieldValidator>
<asp:Button ID = "Button1" runat="server" Text="Submit"/>
</asp:Content>
I'm trying to find a way in JavaScript to catch the validation error and hide the StatusLabel.
I don't want to have to put a javascript function on every button on every page that uses the MasterPage.
Thanks,
Alex
How about something like this:
protected void Submit(object sender, EventArgs e)
{
if (IsValid)
{
StatusLabel.Visible = true;
}
else
{
StatusLabel.Visible = false;
}
}
Your validation code are totally miss lot of fields.
ok now we are going your pint .
Set visible false in your label for page load event
then success time add the label text ,and set visible true
you miss control to validate and validationgroup and display fields
please see this sample
I have a grid view in my main page and I display some data for user(using BindGrid method).this grid view has some command buttons for each row that perform some operation like Update. when user clicks on update button I show to him/her a user control to update values.and when user clicks on update I want grid bind to new data(I want call BindGrid for new data). How I can do this and call a method in main page from user control?
Edit 1)
I wrote this code for user control:
public partial class SomeUserControl : System.Web.UI.UserControl
{
public event EventHandler StatusUpdated;
private void FunctionThatRaisesEvent()
{
if (this.StatusUpdated != null)
this.StatusUpdated(new object(), new EventArgs());
}
public void Page_Load(object sender, EventArgs e)
{
//....
}
protected void Button1_Click(object sender, EventArgs e)
{
FunctionThatRaisesEvent();
}
}
and the designer for user control :
<%# Control Language="C#" AutoEventWireup="true" CodeFile="SomeUserControl.ascx.cs" Inherits="SomeUserControl" %>
<asp:Button ID="Button1" runat="server" Text="Update" Height="70px"
onclick="Button1_Click" Width="183px" />
and add this code for main page:
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Unnamed1_Click(object sender, EventArgs e)
{
SomeUserControl userControl = (SomeUserControl)LoadControl("SomeUserControl.ascx");
userControl.StatusUpdated += new EventHandler(userControl_StatusUpdated);
Panel1.Controls.Add(userControl);
}
void userControl_StatusUpdated(object sender, EventArgs e)
{
GetDate();
}
private void GetDate()
{
TextBox1.Text = DateTime.Today.ToString();
}
and designer for main page:
<%# Register src="SomeUserControl.ascx" tagname="SomeUserControl" tagprefix="uc1" %>
<!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">
</asp:ScriptManager>
<div>
<asp:UpdatePanel ID="upd1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button runat="server" Text="Add User Control" Height="44px" ID="Nims"
onclick="Unnamed1_Click" Width="133px" />
<asp:Panel ID="Panel1" runat="server" BackColor="#FFFFCC"></asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
but it does not work and nothing happend. even I add break point for click user control button code but it seems that event not raise.
Raise the event from the user control, and handle the event from the main page. Check out this question.
//** EDIT **//
You are adding the user control dynamically on button click. When you click the button on your user control it first will initiate postback on the main page - now your user control no longer exists (which is why the event is not raised). If you change your main page designer to look like this:
<%# Register Src="SomeUserControl.ascx" tagname="SomeUserControl" tagprefix="uc1" %>
<!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 id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<asp:UpdatePanel ID="upd1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button runat="server" Text="Add User Control" Height="44px" ID="Nims"
onclick="Unnamed1_Click" Width="133px" />
<asp:Panel ID="Panel1" runat="server" BackColor="#FFFFCC">
<uc1:SomeUserControl ID="userControl" runat="server" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
and your code-behind to look like this
protected void Page_Load(object sender, EventArgs e)
{
userControl.StatusUpdated += new EventHandler(userControl_StatusUpdated);
}
void userControl_StatusUpdated(object sender, EventArgs e)
{
GetDate();
}
private void GetDate()
{
TextBox1.Text = DateTime.Today.ToString();
}
you will see what I mean. Try setting breakpoints on the page load events of your main page and your user control to see exactly the order in which things happen.
You can register an event in your user control, raise the event when user clicks on update button and capture that event on the page.
http://codebetter.com/brendantompkins/2004/10/06/easily-raise-events-from-asp-net-ascx-user-controls/
you need to use event handler for that
define event handler in your ascx page
public event EventHandler ButtonClickDemo;
when you are performing update or delete event use following code there for event handler.
ButtonClickDemo(sender, e);
in parent page use following
protected void Page_Load(object sender, EventArgs e)
{
btnDemno.ButtonClickDemo += new EventHandler(btn_Click);
}
the function to bind grid of parent page
protected void btn_Click(object sender, EventArgs e)
{
BindGrid();
}
above code will call BindGrid function of parent page.
The OnSelectedIndexChanged event is not firing for my dropdown box. All forums I have looked at told me to add the AutoPostBack="true", but that didn't change the results.
HTML:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Current Time: " /><br />
<asp:Label ID="lblCurrent" runat="server" Text="Label" /><br /><br />
<asp:DropDownList ID="cboSelectedLocation" runat="server" AutoPostBack="true" OnSelectedIndexChanged="cboSelectedLocation_SelectedIndexChanged" /><br /><br />
<asp:Label ID="lblSelectedTime" runat="server" Text="Label" />
</div>
</form>
</body>
</html>
Code behind:
public partial class _Default : Page
{
string _sLocation = string.Empty;
string _sCurrentLoc = string.Empty;
TimeSpan _tsSelectedTime;
protected void Page_Load(object sender, EventArgs e)
{
AddTimeZones();
cboSelectedLocation.Focus();
lblCurrent.Text = "Currently in " + _sCurrentLoc + Environment.NewLine + DateTime.Now;
lblSelectedTime.Text = _sLocation + ":" + Environment.NewLine + DateTime.UtcNow.Add(_tsSelectedTime);
}
//adds all timezone displaynames to combobox
//defaults combo location to seoul, South Korea
//defaults current location to current location
private void AddTimeZones()
{
foreach(TimeZoneInfo tz in System.TimeZoneInfo.GetSystemTimeZones())
{
string s = tz.DisplayName;
cboSelectedLocation.Items.Add(s);
if (tz.StandardName == "Korea Standard Time") cboSelectedLocation.Text = s;
if (tz.StandardName == System.TimeZone.CurrentTimeZone.StandardName) _sCurrentLoc = tz.StandardName;
}
}
//changes timezone name and time depending on what is selected in the cbobox.
protected void cboSelectedLocation_SelectedIndexChanged(object sender, EventArgs e)
{
foreach (TimeZoneInfo tz in System.TimeZoneInfo.GetSystemTimeZones())
{
if (cboSelectedLocation.Text == tz.DisplayName)
{
_sLocation = tz.StandardName;
_tsSelectedTime = tz.GetUtcOffset(DateTime.UtcNow);
}
}
}
}
Any advice into what to look at for a rookie asp coder?
EDIT: added more code behind
Graham Clark was correct in needing the !Page.IsPostBack, but it is now something with the global variables that I set. This code was dragged and dropped from a c# project, so I assume there is some issues with global variables and asp.net. Time for me to do more research on this to understand how global variables differ in a standalone as opposed to a web program.
Are you databinding your drop-down list every trip back to the server, or just on a postback? If you're doing it every time, it could be that the server doesn't think anything has been selected, therefore the event won't fire.
Say you're databinding the drop-down in the Page_Load event. You want to do it like this:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
// bind drop-down list here
}
}