Question

In my page when I call searchBtn_Click the selectedvalue will be carried into the variable ind only if the selection hasnt changed. So if a User selects Automotive, then clicks the search button, and then they change the selection to Government, it will refresh the page and display Automotive, am I missing something in the postback or doing something wrong here?

    protected void Page_Load(object sender, EventArgs e)
    {
        string industry = "";

        if (Request.QueryString["ind"] != null)
        {
            industry = Request.QueryString["ind"].ToString();
            if (industry != "")
            {
                indLabel.Text = "Industry: " + industry;
                IndustryDropDownList.SelectedValue = industry;
            }
        }
    }

    protected void searchBtn_Click(object sender, EventArgs e)
    {
            string ind = IndustryDropDownList.SelectedValue;
            Response.Redirect("Default.aspx?ind=" + ind);
    }

Answer 1

Simply replace your code with this code

      protected void Page_Load(object sender, EventArgs e)
    {
if(!IsPostBack)
     {
        string industry = "";

        if (Request.QueryString["ind"] != null)
        {
            industry = Request.QueryString["ind"].ToString();
            if (industry != "")
            {
                indLabel.Text = "Industry: " + industry;
                IndustryDropDownList.SelectedValue = industry;
            }
        }
      }
    }