title: TextChanged event only fires when I put my cursor in the textbox and change the text
body: <p>I have a TextChanged Even on a textbox and when I enter data into it, it updates another textbox which in turn is supposed to fire a TextChanged Event, but it is not firing until I put my cursor in the TextBox.  Is there a solution to this?</p>
  
  <p>Code for updating the Extended Price when Qty Changes:</p>
  
  <pre><code>protected void txtQty1_TextChanged(object sender, EventArgs e)
      {
          if (txtQty1.Text != string.Empty &amp;&amp; txtUnitPrice1.Text != string.Empty)
          {
              int qty = Convert.ToInt32(txtQty1.Text);
              double unitPrice = Convert.ToDouble(txtUnitPrice1.Text);
  
              double extendTotal1 = qty * unitPrice;
  
              txtExtPrice1.Text = extendTotal1.ToString();
  
          }
      }
  </code></pre>
  
  <p>Code for updating the extending price When Unit Price changes:</p>
  
  <pre><code>    protected void txtUnitPrice1_TextChanged(object sender, EventArgs e)
      {
          if (txtQty1.Text != string.Empty &amp;&amp; txtUnitPrice1.Text != string.Empty)
          {
              int qty = Convert.ToInt32(txtQty1.Text);
              double unitPrice = Convert.ToDouble(txtUnitPrice1.Text);
  
              double extendTotal1 = qty * unitPrice;
  
              txtExtPrice1.Text = extendTotal1.ToString();
  
          }
      }
  </code></pre>
  
  <p>Finally, this should update the Grand Total When Extending Price Changes:</p>
  
  <pre><code> protected void txtExtPrice1_TextChanged(object sender, EventArgs e)
      {
  
          if (txtExtPrice1.Text != string.Empty)
          {
              double extendedTotal1 = Convert.ToDouble(txtExtPrice1.Text);
              double grandTotal = Convert.ToDouble(txtGrandTotal.Text);
  
              grandTotal += extendedTotal1;
  
              txtGrandTotal.Text = grandTotal.ToString();
          }
  
      }
  </code></pre>
  
  <p>Is it true that I should probably make Grand Total a Static Variable?</p>