This is the first webservice I have made and I am having issues with my current functionality. My button in Visual Studio will only accept OnClientClick without the error below. My button is defined as such in my .aspx:
<asp:Button ID="btnSearch" runat="server" OnClick="btnSearch_Click" Text="Search">
The aspx.cs file contains this:
protected void btnSearch_Click(object sender, EventArgs e)
{
Response.Redirect("www.google.com"); //just for a testing
}
The error thrown is:
CS1061: 'ASP.main_aspx' does not contain a definition for
'btnSearch_Click' and no extension method 'btnSearch_Click' accepting a
first argument of type 'ASP.main_aspx' could be found
I have looked at various posts about onclick events and nothing I have tried has been the solution. Any ides on why when I click my button it doesn't redirect? Also I would like to use OnClick rather than OnClient.
As per discussion in comment, issue is here:
CodeBehind="Main.aspx.cs
Change it to
CodeFile="Main.aspx.cs"
This will solved your error.
Related
Coding a page in asp.net webforms, I put a button and textbox in site.master file.
I want to do a specific action (defined in a method) when I click in button, so I put this method in site.master.cs. This method, besides other things, take the value of textbox.
I can´t reach the method when I am clicking in it.
Am I coding it in a proper way?
Are there another way to do it?
This is the relevant code.
site.master
<input id="mailListaD" type="text" value="Introduce tu Email…" runat="server"
onfocus="this.value=(this.value=='Introduce tu Email…')? '' : this.value ;" />
<asp:Button id="news_go" Text="GO" OnClick="listaDistribucion_Click" runat="server"/>
site.master.cs
protected void listaDistribucion_Click(object sender, EventArgs e)
{
string query = "INSERT INTO listaDistribucion VALUES(''," + mailListaD.Value +")";
ExecuteQuery(query);
Close();
}
The error when I compile the proyect is:
error CS7036: There is no argument given that corresponds to the required formal parameter 'sender' of 'SiteMaster.listaDistribucion_Click(object, EventArgs)'
Try generating the event from the IntelliSense, delete the event that is attached to the button and then write OnClick=.. when intellisense appears click Create New Event and in the code behind you get an event that has the name of the id of the button and onclick appended to it.
Also check if you have the correct code behind page in your masterpage in the first line above CodeBehind="MyPage.aspx.cs", check if the name of your code behind is correct.
Server Error in '/asppub' Application.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: CS1061: 'ASP.mis3200_unit4_ringu4pos_aspx' does not contain a definition for 'rblSnacks_SelectedIndexChanged' and no extension method 'rblSnacks_SelectedIndexChanged' accepting a first argument of type 'ASP.mis3200_unit4_ringu4pos_aspx' could be found (are you missing a using directive or an assembly reference?)
Source Error:
Line 102: Would you like any snacks?</td>
Line 103: <td class="style7">
Line 104: <asp:RadioButtonList ID="rblSnacks" runat="server"
Line 105: RepeatDirection="Horizontal" Width="96px" AutoPostBack="True"
Line 106: onselectedindexchanged="rblSnacks_SelectedIndexChanged">
Source File: c:\Users\Ryan\Desktop\asppub\MIS3200\Unit4\RingU4POS.aspx Line: 104
The given error message in my coding class was this:
Snacks: toggle visiblity based on yes/no selection: -2
The list of snacks should only be visible when somebody selects Yes (otherwise, it should be invisible). You needed to double-click the RadioButtonList to create a method which had functionality to toggle the visibility property of the CheckBoxList. For this method to work, you must enable AutoPostBack for the RadioButtonList. "
What am I doing wrong? Any help would be appreciated.
You have missed this in server side
protected void rblSnacks_SelectedIndexChanged(object sender, EventArgs e)
{
}
Add this code in your code behind
protected void rblSnacks_SelectedIndexChanged(object sender, EventArgs e)
{
// some code
}
You should define a rblSnacks_SelectedIndexChanged method in a code behind that will handle the SelectedIndexChange event for the radio button. And if you do not need it, you should remove it.
As the error suggests, you have to have the SelectedIndexChanged in your code behind. So add this code,
protected void rblSnacks_SelectedIndexChanged(object sender, EventArgs e)
{
//your code;
}
I seem to be having a problem with my button's OnClick, it doesn't even react at all to the event. It responds to OnClientClick and executes the code, but when I try to relate it o a function in my .aspx.cs class it just ignores it, and it should be executing very simple code (writing to the output debug)
I've checked every other stackoverflow post about this I could find and no one had the same issue.
I know that my Index.aspx is executing the code inside Index.aspx.cs because the Page_Load function is outputting to the debug window, so that's not the problem.
Here's the important code:
<asp:Button ID="btnCreateOrder" runat="server" Text="Create Order" OnClick="btnClick" />
protected void btnClick(object sender, EventArgs e)
{
System.Diagnostics.Debug.Write("Testing3");
}
Like I said the Page_Load function is working fine so it's not an issue of them not being connected.
DIFFERENT PROBLEM IF YOU FEEL SO INCLINED:
While you're reading, I also have a problem of not being able to find objects from my HTML in my CS file.
What I mean by that is, if I reference this label:
<asp:Label ID="testLabel" runat="server" Text="test"></asp:Label>
by saying
testLabel = "Test2";
I get the error "The name 'testLabel does not exist in the current context"
And if I try to reference it by saying this:
Index.testLabel = "Test2";
I get "'MyProject.Views.Home.Index' does not contain a definition for 'testLabel'" even though it clearly does.
Maybe the .designer file is bad.
Try this: delete the .designer.cs file of your .aspx page, right-click on it and select the 'Convert to web application' option.
EDIT: As for the Button event, how did you generate the method stub for the click event? Did you click the button on the designer view twice and the visual studio generated id for you or did you handcoded it?
Try to delete both the button and the button click event, and when you declare the button again, double click it on the designer view.
I am working on an ASP.NET project, I have a button that I want to fire a method in code behind to update database with updated client data when clicked.
This is my button:
<asp:Button ID="button1" runat="server" OnClick="submitChanges_OnClick" Text="Submit" />
Code behind:
private void submitChanges_OnClick(object sender, EventArgs e)
{
//Code here
}
On page load I get this error message:
Compiler Error Message: CS1061: 'ASP.account_heatingcontrols_aspx' does not contain a
definition for 'submitChanges_OnClick' and no extension method 'submitChanges_OnClick'
accepting a first argument of type 'ASP.account_heatingcontrols_aspx' could be found
(are you missing a using directive or an assembly reference?)
Can anybody tell me what I am doing wrong here, I have googled, but no luck.
Any help would be great!
Change private to protected.
protected void submitChanges_OnClick(object sender, EventArgs e)
I have an internal web service (ASP.NET) written on C# in a company I work for. There are only 2 pages in it, one of this pages contains DropDownList.
Every time when user selecting an item from that DropDownList I need to somehow pass selected item value to a static method and show result string of that method anywhere on page.
I've never worked with ASP.NET or any web programming before and a bit confused about how to do it, not sure where to start looking even.
In your aspx file you should have this:
<asp:ListBox ID="ListBox1" runat="server" AutoPostBack="True"
onselectedindexchanged="ListBox1_SelectedIndexChanged"></asp:ListBox>
Notice the AutoPostBack="True" which goes back to the server and fires the selectedindexchanged event immediately after the user changes the selection in the listbox
In your code-behind (.cs file)
You should have this:
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
// Call static method and pass the ListBox1.SelectedIndex
// MyStaticMethod(ListBox1.SelectedIndex);
}
you can either se5t the autoPostBack="true" and handle the change event on the server side or using jQuery subscribe for the change event and get the value on the client side
You should probably check out some of the great resources that microsoft provides for new .NET developers. They will be really helpful in getting you started. Her is a link of some really good videos to help you out: http://www.asp.net/web-forms/videos
Not sure what language you are coming from, if any... But for the most part webforms is going to work a lot like other web based methodologies.
Your ASP.NET Controls (in your case the DropDownList) have both client and server side events.
You will probably want to map the server-side OnSelectedIndexChanged event on your DropDownList.
In order to cause a postback on that control you will want to set the AutoPostBack property to true on your DropDownList.
try this one
In html ,
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
In aspx.cs page,,
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string selctedValue = DropDownList1.SelectedValue;
/// Call yours static methid here
YourMethod(selctedValue);
}