Resend message on refreshing the page in asp net

Introduction

Resending a message on the page in ASP.NET can be achieved by using session variables. Session variables are used to store and retrieve data across multiple requests for a particular user. In this article, we will explore how to implement this functionality in ASP.NET with examples.

Implementation

To with, let's create a ASP.NET web form with a and a button. The user will a message in the textbox and click the button to send the message. On clicking the button, we will store the message in a session variable and display it on the page.






    Resend Message on Refresh


    

In the code above, we have a textbox with ID “txtMessage” and a button with ID “btnSend”. On clicking the button, the handler “btnSend_Click” will be triggered.

Code Behind

In the code-behind file, we will the button click event and store the message in a session variable. We will also retrieve the message from the session variable and display it on the page.


using System;

public partial class Default : System.Web.UI.Page
{
    protected void btnSend_Click(object sender, EventArgs e)
    {
        string message = txtMessage.Text;
        Session["Message"] = message;
        lblMessage.Text = message;
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Session["Message"] != null)
            {
                string message = Session["Message"].ToString();
                lblMessage.Text = message;
            }
        }
    }
}

In the code above, we first retrieve the message entered by the user from the textbox and store it in a session variable named “Message”. We then set the label “lblMessage” text property to display the message.

On page load, we check if the page is not a postback (i.e., the page is not refreshed). If the session variable “Message” is not null, we retrieve the message from the session variable and display it in the label.

Conclusion

By using session variables, we can easily resend a message on refreshing the page in ASP.NET. The session variables allow us to store and retrieve data across multiple requests for a particular user. This functionality can be useful in scenarios where we want to data between page refreshes.

Remember to always handle session variables with caution and clear them when they are no longer needed to unnecessary memory usage.

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