Accessing other page control values - ASP.NET 3.5 & C#

Hi Moksha,

If my previous answer helped you, please tick 'Do you like this answer' check box near that answer.


The reason for your issue is one of those methods return a null value and you try to execute a method on that.

Try to run the coode given below instead of the code you gave. it will tell you what happens exactly.


            if (Page.PreviousPage == null)
            {
                MessageBox.Show("Cannot access PreviousPage");
            }
            if ((Page.PreviousPage.FindControl("ContentPlaceHolder1")) == null)
            {
                MessageBox.Show("cannot find ContentPlaceHolder1");
            }
            else if (((ContentPlaceHolder)Page.PreviousPage.FindControl("ContentPlaceHolder1")).FindControl("TxtUserName") == null)
            {
                MessageBox.Show("cannot find TxtUserName");
            }
            else
            {
                TextBox1.Text = ((TextBox)((ContentPlaceHolder)Page.PreviousPage.FindControl("ContentPlaceHolder1")).FindControl("TxtUserName")).Text;
            }

Thank you very much. Using your suggestion of session variable worked.

If you have any hint on why TextBox1.Text = ((TextBox)((ContentPlaceHolder)Page.PreviousPage.FindControl("ContentPlaceHolder1")).FindControl("TxtUserName")).Text; or any other method of FindControl did not work and it is throwing System.NullReferenceException: Object reference not set to an instance of an object. exception, please share.

At present, I am using the solution of session variables.

Thanks once again.

Regards,
Moksha.

Hi Moksha,


Did you try to set the value to a session variable in Page1.aspx and access the session from Page2.aspx?