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 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

How to validate dropdownlist in JavaScript

In this article you will see how to put validation in dropdownlist by javascript, suppose first item value of dropdownlist is 0 and text is "-Select-" just like given below and we have to validate that at least one item is selected excluding default i.e "-Select-".

Uploading large file in chunks in Mvc c# from Javascript ajax

Often we have a requirement to upload files in, 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.

Customize comment box in blogger

Now it is possible to customize your blogger comment box in simple way there no need to edit HTML of your blogger just through the adding some simple css to the blogger.

Regular expression for alphanumeric with space in c#

How to validate that string contains only alphanumeric value with some spacial character and with whitespace and how to validate that user can only input alphanumeric with given special character or space in a textbox (like name fields or remarks fields). In remarks fields we don't want that user can enter anything, user can only able to enter alphanumeric with white space and some spacial character like -,. etc if you allow. Some of regular expression given below for validating alphanumeric value only, alphanumeric with whitspace only and alphanumeric with whitespace and some special characters.

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)