How to avoid page refresh after button click event using C#

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I have create 100 buttons dynamically using c#, but when i click on button Page refresh every time, i want to avoid page refresh using C#, plz provide some solution...
Thanks in advance.

What I have tried:

protected void Page_Load(object sender, EventArgs e)
    {
        HtmlTable myTable = new HtmlTable();
        int n = 0;
        for (int i = 0; i < 20; i++)
        {

            HtmlTableRow row = new HtmlTableRow();
            for (int c = 1; c <= 5; c++)
            {
                n = (5 * i) + c;
                HtmlTableCell cell = new HtmlTableCell();
                Button btn = new Button();
                btn.Text = n.ToString();
                btn.ID = n.ToString();
                //btn.BackColor = Color.Transparent;
                btn.Width = 30;
                btn.Height = 25;
                btn.Click += new EventHandler(btn_Click);
                cell.Controls.Add(btn);
                row.Controls.Add(cell);
                myTable.Controls.Add(row);
                cell.Attributes.Add("Class", "htTableCellCss");
            }
            row.Attributes.Add("Class", "htTableRowCss");
        }
        myTable.Attributes.Add("Class", "htTableCss");
        PlaceHolder1.Controls.Add(myTable);
    }

    public void btn_Click(object sender, EventArgs e)
    {
        Response.Write(((sender) as Button).Text);
        Button btn = sender as Button;
        btn.BackColor = Color.Green;
        
    }

Posted 19-Jun-17 19:58pm

Member 13253455

Updated 19-Jun-17 23:52pm

v2

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Afzaal Ahmad Zeeshan · Answer 1 · 2017-06-19T22:09:00

You can never use C# to prevent the browser from refreshing the page, that is just not what C# is meant to do. Instead, you need to use JavaScript and then handle the page refresh event to cancel it.

JavaScript

$("#yourBtn").click(function() { 
   // For example, in the click event of your button
   event.preventDefault(); // Stop the default action, which is to post
});

This way, you can prevent the page from refreshing. However, then to post the content (if there is a requirement) you will need to send that data using Ajax request.

However, if you still want to do that, then you might want to register a script to that button, that in turn (using JavaScript) prevents the page from reloading.

F-ES Sitecore · Answer 2 · 2017-06-19T22:20:00

Solution 3

Put your controls inside an update panel.

Introduction to the UpdatePanel Control[^]

Posted 19-Jun-17 22:20pm

F-ES Sitecore

hinaiqbal · Answer 3 · 2017-06-19T20:14:00

Solution 1

Use page property Ispostback for that purpose

Posted 19-Jun-17 20:14pm

hinaiqbal

Hitesh Chavada · Answer 4 · 2017-06-19T23:52:00

Solution 4

protected void Page_Load(object sender, EventArgs e)
{
  if (!IsPostBack)
  {
    // page load code
  }
}

Posted 19-Jun-17 23:52pm

Hitesh Chavada

Comments

Member 13253455 26-Jun-17 15:16pm

when i'm using

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// page load code
}
}

my buttons become invisible