Asp.Net C# Button Onclick Even Not Firing

asp.net Button OnClick event not firing

Have you copied this method from other page/application ? if yes then it will not work, So you need to delete the event and event name assigned to the button then go to design and go to button even properties go to onClick event double click next to it, it will generate event and it automatically assigns event name to the button.
this should work

ASP.NET dynamic Command Button event not firing

Essentially you need to create the original controls once on page load in order to be able to handle the button click, you then need to clear the controls and re-generate them either in the button click handler or as you have done on pre-render - i think it is cleaner on the click handler, so you need the same code in both (preferable refactored out to a separate method)

The example below would mean minimum code changes for you:

Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender
    If Not Session("Items") Is Nothing Then
        pnlAddedLines.Controls.Clear()
        GenerateControls()
    End If
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Not Session("Items") Is Nothing Then
        GenerateControls()
    End If
End Sub
Private Sub GenerateControls()
    Dim dtItems As System.Data.DataTable = CType(Session("Items"), System.Data.DataTable)
    Dim iItemIndex As Integer = 1
    For Each drRow In dtItems.Rows
        Dim btnClose As New Button
        btnClose.ID = "btnClose" & iItemIndex

asp.net button click event not firing on web server

i found the issue. i tried to read (not write) to see if i have a connection problem. The error i had solved in this link Login failed for user 'IIS APPPOOL\ASP.NET v4.0' and this solved my problem.

i hope this may help any one will have the same problem.

Thanks for all your help.

ASP.NET control event handler not firing on postback?

So, as it turns out we set the PostbackUrl property on one of our buttons in control A... this caused the event handlers for control B not to fire when a button in control B was pressed.

C# code behind for Button Click Event, ASP.NET

You could probably get away with adding the runat="server" attribute to your buttons but I've never tried it and frankly, using proper web controls would be the best way to go.

Replacing them shouldn't change the look and feel of the page at all. Just add CssClass="xxx" to apply the css if there is any, otherwise they render to standard html elements anyway.

Your markup should look something like this:

<asp:Button runat="server" id="btnLogin" Text="Log In" OnClick="btnLogin_Click" />

The matching event handler in your code would look like this:

protected void btnLogin_Click(object sender, EventArgs e)
{
    // Here's where you do stuff.
}

C# applying click event listener in "Code-Created" Buttons

I don't remember well enough the events on the buttons since I'm on my phone. But, you should do something like this:

(Assuming you are using Winforms)

in your loop:

newButton.Click += new EventHandler(do_something);

outside the loop:

void do_something(object sender, EventArgs e)
{
    var btn = sender as Button;
    if(btn.Text == "something")
    {
        //now, do something cool  
    }
}