Validate textbox value manually (C#) : TextBox « Asp Control « ASP.Net






  1. ASP.Net
  2. Asp Control
  3. TextBox

Validate textbox value manually (C#)

<%@ Page Language="c#" Debug="true" %>
<script Language="c#" runat="server">
  void CompleteOrder(object sender, EventArgs e)
  {
    if (txtQuantity.Text != "")
    {
      if (!(Char.IsNumber(txtQuantity.Text,0)))
      {
        if (txtQuantity.Text.Substring(0,1) != "-")
        {
          lblOrderConfirm.Text = "Please provide only numbers in Quantity field.";
        }
        else
        {
          lblOrderConfirm.Text = "Please provide a Quantity greater than 0."; 
        }
      }
      else if (Convert.ToInt32(txtQuantity.Text) == 0)
      {
        lblOrderConfirm.Text = "Please provide a Quantity greater than 0."; 
      }
      else if (Convert.ToInt32(txtQuantity.Text) > 0)
      {
        lblOrderConfirm.Text = "Order Successfully placed."; 
      }
    }
    else
    {
      lblOrderConfirm.Text = "Please provide an Order Quantity.";
    }
  }
</script>
<html>
  <head>
    <title>Manual Trapping Example</title>
  </head>
  <body>
    <form method="post" action="manualtrapping.aspx" runat="server">
      <asp:Label text="Order Quantity" runat="server" />
      <asp:TextBox id="txtQuantity" runat="server" />
      <br />
      <asp:Button id="btnComplete_Order" Text="Complete Order"
                                         onclick="CompleteOrder"
                                         runat="server"/>
      <br />
    <asp:Label id="lblOrderConfirm" runat="server"/>
    </form>
  </body>
</html>








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