Skip to main content

Preventing re-execution of method when press browser's refresh button

Often we see that after executing a functionality by a button click (through posting a form to server), when we click on browser refresh button then a pop up re-sending previous page information to server shows and after clicking resend (retry in IE) that particular functionality re-executed i.e reinsertion occurs in database or some other functionality that previously had been done.

So how to prevent this problem in asp.net programming (i.e not execution previous functionality again.)
Just copy and paste function given below any where in CS page and register a hidden field to ASPX page



public bool notIsRefresh()
{
    bool retVal = false;
    if (Session["match"] == null || Session["match"].ToString() == hdnRFMatch.Value)
        retVal = true;
    Session["match"] = DateTime.Now.Ticks;
    hdnRFMatch.Value = Session["match"].ToString();
    return retVal;
}

<%--Register anywhere in page--%>
<asp:HiddenField runat="server" id="hdnRFMatch" />


notIsRefresh is a bool return type function which return true if page posted directly by the button given in the page and return false if page posted through the browser refresh button.

And further use like this below,

 protected void btnInsert_Click(object sender, EventArgs e)
 {
     if (notIsRefresh())
     {
         //Response.Write("not refresh");
         //Do Your work here.
     }
 }


Popular posts from this blog

Merging multiple PDFs using iTextSharp in asp.net c#

In this article i will show you how to merge multiple pdfs into one using ITextSharp below is the two approach one is to pass your input files path, output file path (will be created if not exist) and another is pass direct input stream, output stream and it will write the merge files into output stream.

Uploading large file in chunks in Asp.net Mvc c# from Javascript ajax

Often we have a requirement to upload files in Asp.net, Mvc c# application but when it comes to uploading larger file, we always think how to do it as uploading large file in one go have many challenges like UI responsiveness, If network fluctuate for a moment in between then uploading task get breaks and user have to upload it again etc.

how $document.ready() is different from window.onload()

we often use window.onload() in javascript and $document.ready() in jquery and assume that both are same just jquery library wrap up javascript window.onload() and introduce $document.ready() but no there is much difference between them below is the explanation -

How to handle click event of linkbutton inside gridview

Recently I have posted how to sort only current page of gridview, Scrollble gridview with fixed header through javascript, File upload control inside gridview during postback and now i am going to explain how to handle click event of linkbutton or any button type control inside gridview.

We can handle click event of any button type control inside gridview by two way first is through event bubbling and second one is directly (in this type of event handling we need to access current girdviewrow container)