The code to trigger the button with the ID 'Button' using Document.getElementById() is not executing the associated code-behind

Having just started coding in javascript/VB.NET, I am struggling to get my Button2 onClick event to work properly.

The Code-Behind Click Event for Button1 in Page.aspx.vb:

Protected Sub _lnbComments_Click(ByVal sender As Object, ByVal e As System.EventArgs)
           //Some Code that needs to run before opening Modal Page
           Dim Script As String = "JavaScriptCode();"
           ScriptManager.RegisterStartupScript(Me.upnToolBar, Me.upnToolBar.GetType(), "CommentsClick", Script, True)
End Sub

In the JS File:

function ShowModal(page,name,style){
    var r = window.showModalDialog(page,window,style);
}
function JavaScriptCode(){
    var jsButton = document.getElementById('ct100_SiteContent__hiddenBtnComments'); //I made sure ClientID is correct
    jsButton.click() //This should trigger onClick event and OPEN modalPage
}

During the OnLoad of Page.aspx:

Me._hiddenBtnComments.Attributes.Add("onclick","ShowModal('SomePage.aspx','SomePage','somestyle')")

Even though only the Javascript code is being executed and the Modal Page is opened, the problem arises when the code-behind click Event does not fire after closing the Modal Page. Any thoughts on what could be wrong with the code?

The Mark-up for Button 2 in Page.aspx:

<asp:Button id="_hiddenBtnComments" runat="server" style="display:none" onclick="_hiddenBtnComments_click"></asp:Button>

The Code-Behind Click Event for Button2 in Page.aspx.vb:

Protected Sub _hiddenBtnComments_click(ByVal sender As Object, ByVal e As System.EventArgs) Handles _hiddenBtnComments.Click
//Some Code that needs to run AFTER Modal Page closes.
End Sub

EDIT: A friend recommended using window.open instead of window.showmodaldialog(), which successfully triggers the code-behind click Event. However, it is essential to stick with window.showmodaldialog as per user expectations.

Answer №1

click() function does not trigger click event in JavaScript directly. It is suggested to utilize jQuery or the dispatchEvent method instead. For further information, refer to this post: How to simulate a click with JavaScript?

Answer №2

Is there a reason for not directly invoking the ShowModal function instead of using event triggers?

If you require dynamic parameters, consider including data-attributes in your element.

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