I have a redirect page url "http://127.0.0.1/HOG/HOG_reporting_Rly.aspx?Monday=Y&Zrly=CR&dt=01-Apr-19" for rendering another aspx page having grid view (based on query parameters). Now I am trying to set query string "dt" date to textbox in edit mode so that data could be updated but it giving error
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Here is my entire code:
- <%@ Page Language="C#" %>
-
-
-
- "server">
- public void Page_Load(object sender, EventArgs e)
- {
-
- if (!Page.IsPostBack)
- {
- if (Request.QueryString["dt"] != null)
- {
- ((TextBox)GridView1.FindControl("TextBox17")).Text = Request.QueryString["dt"];
- }
-
- }
- }
-
-
- "http://www.w3.org/1999/xhtml">
- "server">
-
- "text/css">
- .auto-style1 {
- text-align: center;
- }
-
- .auto-style2 {
- font-family: Tahoma;
- font-size: medium;
- color: #990000;
- font-weight: bold;
- }
-
-
-
- "form1" runat="server">
- class="auto-style1">
-
- class="auto-style2">HOG Train Master (List of All HOG Trains)class="auto-style2" />
-