title: asp.net loads to the first tab when i make action in another tab
body: <p>I have three tabs like this:</p>
  
  <p><img src="https://i.stack.imgur.com/eHHKK.png" alt="enter image description here"></p>
  
  <p>When I press on the last table, there is a code behind executing to get data from database. I have done all of that.</p>
  
  <h3>my problem</h3>
  
  <p>in the last tab there is a button, when I press it. it loads the whole page and then returns to the first tab open. </p>
  
  <h3>what I want</h3>
  
  <p>when I pressing that button in the last tab, I want to get the data and present it, whit out making the page goes to the first tab.</p>
  
  <h3>i am sure it is something about post back but i don't know anything about it</h3>
  
  <h3>Edit</h3>
  
  <p>this is my code in c#</p>
  
  <pre><code>protected void BookingForDate_Click(object sender, EventArgs e)
          {
  //do something in database and fill the table
  }
  </code></pre>
  
  <h3>Edit2</h3>
  
  <pre><code>protected void Page_Load(object sender, EventArgs e)
          {
  // go to database and get data to fill it in the first tab
  
  }
  </code></pre>