ASPX code :
<asp:Button ID="medicalSub" runat="server" ValidationGroup="medical" Text="Save" CausesValidation="false" UseSubmitBehavior="false" ClientIDMode="Static" OnClick="medicalSub_Click" />
ASPX.CS code :
protected void medicalSub_Click(object sender, EventArgs e)
{
console.writeline("hello");
}
Error
According to that stack trace, the problem is not calling the click method. Instead, it's failing trying to load viewstate for a dropdown list control. This is long before trying to handle any events.
Try this:
copy and paste this in your page load section of your code and check if that helps:
If(!IsPostBack)
{
}
Or the following will hep:
<%# Page so just add the rest => EnableEventValidation="false" %>
Related
I am having an issue with the asp.net button. It is not firing event. I tried setting causes validation to false and removing the java script and validation but it still doesn't work.
<asp:Button ID="Button2" runat="server" Text="Save" onclick="Button2_Click" />
protected void Button2_Click(object sender, EventArgs e)
{
std.AddGuardianInfo(
Convert.ToInt16(DropDownList1.SelectedValue),
TextBox6.Text,
TextBox7.Text,
TextBox8.Text,
TextBox9.Text,
TextBox10.Text);
Response.Redirect("Std_FeeInfo.aspx");
}
Change onclick to OnClick in the markup of the asp:button. so the markup will be like this:
<asp:Button ID="Button2" runat="server" Text="Save" OnClick="Button2_Click" />
And an important advise for you: Use css for styling and arranging elements in your page, giving space using a sequence of will not be a good design
You want to check this steps.
#rabiya are you copied this code in some where else ? Then just remove it and double click on your asp button.
If you are using updatepanel on onclick event, this may happen.So Use 'EnableEventValidation="false"'
Example :
<%# Page Language="C#" AutoEventWireup="true" EnableEventValidation="false" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
Despite the fact that I have placed my asp:Button inside an UpdatePanel, it is still triggering a postback on the full page the first time it's clicked. Also, the OnClick event isn't being caught the first time I click the button either, but every single time after that everything works fine.
Any ideas what could be causing this problem? See the code below.
(In my Site.Master file)
<asp:ScriptManager runat="server" AjaxFrameworkMode="Enabled" EnablePartialRendering="true" ValidateRequestMode="Disabled">
</asp:ScriptManager>
(In my actual webpage)
<%# Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Editor.aspx.cs" Inherits="Technology.WebForm1"
validateRequest="false" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
<textarea id="htmlTexarea" runat= "server" style="height: 90%"></textarea>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="testBtn" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:Button ID="testBtn" style="" runat="server" ClientIDMode="Static" OnClick="testBtn_Click" UseSubmitBehavior="false" />
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
My C# codebehind is:
protected void Page_Init(object sender, EventArgs e) {
testBtn.Click += testBtn_Click;
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void testBtn_Click(object sender, EventArgs e)
{
String test = "Helloworld";
}
Is there anything I've left out or have done wrong?
EDIT: I added the following to the C# code behind:
protected void Page_Load(object sender, EventArgs e)
{
//Should return POST, returns GET on first click
String test = Request.HttpMethod;
if (!IsPostBack)
{
//stops here first time
String hello = "Hello world";
}
else {
//should stop here
String hello = "Hello world";
}
}
The first time I click the button the server is getting a GET request and IsPostBack is returning false, without changing anything every other click sends a POST request and IsPostBack is true. Anyone know what could be causing this?
The problem was being caused by the fact that I was going from another page to this page using Server.Transfer(...), I'm not entirely sure how but this was affecting the POST request sent by the page the first time but once the page reloaded itself after the request everything worked. In my master page I changed the code to Response.Redirect(...) and it now works perfectly. Apologies if this isn't the clearest explanation but to be perfectly honest I'm not quite sure why this solved the problem, if anyone could clarify what was going on in the comments I'd really appreciate it.
I read online that if I want to make a data binding expression inline I have to call the databind method on the Page_Load function. However I am unable to access the button control in the code behind for some reason. I have access to all the other buttons on my form except the one I want. Here is some code:
<asp:Button ID="CartButton" runat="server" Text="View Cart <%# Session["Counter"].ToString() %>" OnClick="List_Items" />
and
protected void Page_Load(object sender, EventArgs e)
{
CartButton.DataBind();
}
This gives me an error that 'CartButton' does not exist in the current context. Running the page without the DataBind method call returns an error telling me that my
The server tag is not well formed.
Thanks for the help!
Try This
<asp:Button ID="Button1" runat="server" Text='<%# Session["Counter"].ToString() %>'/>
May this will help you.
Regards
AB Vyas
I think in this situation you don't need the databinging. Try to do something like that instead:
protected void Page_Load(object sender, EventArgs e)
{
CartButton.Text = String.Format("View Cart {0}", Session["Counter"].ToString());
}
<asp:Button ID="CartButton" runat="server" OnClick="List_Items" />
Below is my code:
default.aspx:
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master"
AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="TestAjax._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
//I set an onClick event on this button:
< input type = "button" id="btnCl" onclick = "doJob" />
</asp:Content>
default.aspx.cs:
protected void Page_Load(object sender, EventArgs e)
{
//fires on page load;
}
void doJob()
{
//code here;
}
The question is:
Why didn't the onclick event trigger? (On default.aspx btnCL)
Thanks
You need to use an asp:Button control like this:
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
and then have the event method like this:
protected void Button1_Click(object sender, EventArgs e)
{
// your code here
}
When using a regular input tag, onclick is for javascript, you have to instead use the ASP.NET control asp:Button in order to hook up the C# method.
As stated in my comment in OP your current method is making a client-side call (so looking for a JavaScript function called doJob. You need to make a server-side call so need to use an <asp:Button> control. Some example of how you could achieve this:
Web-Page (.aspx)
<asp:Button ID="btnDoJob" Runat="server" Text="Do Job" OnClick="btnDoJob_Click" />
Code-Behind (.CS)
protected void btnDoJob_Click(object sender, EventArgs e)
{
// Do your action here...
}
Because dojob() is a server-side function, but onclick on that input element is a client-side event. You're probably getting an error in your JavaScript console saying that dojob() is an undefined function.
Use an asp:Button instead of an input to make use of server-side click events. Also, dojob() should be protected. By not declaring a protection level I think the default is private so the page controls might not even be able to see it. It should match the event handler for a button click:
protected void dojob(Object sender, EventArgs e)
{
}
I am having trouble trying to redirect to a new page after the button has been clicked. But this button also saves my datatable into an excel file. I want it to be able to save and redirect at the same time.
this is the code in the .CS file for the button
protected void SaveButton_Click(object sender, EventArgs e)
{
this.SaveExcel();
Response.Redirect("Default.aspx", true);
}
Also in the .aspx page i have this
<asp:Button ID="SaveButton" runat="server" Text="Save"
onclick="SaveButton_Click" Enabled="False" onclientclick="needToConfirm=false"/>
as you can see i have a onlclientclick function which is needed.
I have tried using javascript and also the Server.Transfer metothds. Has anyone got an idea how to do this?
Your OnClientClick should be in the following format.
OnClientClick="needToConfirm(); return false"
If this doesn't work there is an error in your JavaScript which is causing your c# code not to fire.