Question

I am facing problem in query string. Following is my asp code

  <asp:Label ID="Lable1" runat="server" Text=""  ></asp:Label>
  <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />

C# code:

  protected void Page_Load(object sender, EventArgs e)
{   
}
protected void Button1_Click(object sender, EventArgs e)
{
    Lable1.Text += Request.QueryString["refresh"] ;
    Response.Redirect("QueryString1t.aspx?refresh=" + 1 + "");    
}

Up to my knowledge Lable1 text should change on button click every time. Lable1 text should not show any thing on page load . on button click it should be like for first click 1 for second click 11 and so on..
But it is not showing as my expectation .So tell me please where i am wrong?

Answer 1

You are redirecting after setting label text, wrong approach.

Try this: –

protected void Page_Load(object sender, EventArgs e)
{
    Lable1.Text = Request.QueryString["refresh"];
}
protected void Button1_Click(object sender, EventArgs e)
{
    Response.Redirect("QueryString1t.aspx?refresh=" +
     string.IsNullOrEmpty(Request.QueryString["refresh"]) ? 0 :
      Convert.ToInt32(Request.QueryString["refresh"]) + 1 + "");    
}

OR this: –

protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
    Lable1.Text = string.IsNullOrEmpty(Lable1.Text) ? "0" :
        (Convert.ToInt32(Lable1.Text) + 1).ToString();  
}