无法将会话传递到下一页.

当我单击LinkBut​​ton时，我试图将我的categoryName切换到下一页.但是，当我调试我的代码时，它没有进入if语句并跳过它.我不知道到底是什么问题.我在哪里出错了?

这是我第一页的.cs代码:

I am trying to Session over my categoryName over to the next page when clicked on the LinkButton. However, when i debug my codes, it didnt go inside the if statement and skipped it. I do not know what exactly the problem is. Have i gone wrong anywhere?

Here is my .cs code for the first page:

categoryName.Text = Session["categoryName "].ToString();
        Response.Redirect("Category2.aspx");

这是我第二页的.cs代码(我将此代码放在Page_Load中):

Here is my .cs code for the second page (I place this code in Page_Load):

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["categoryName "] != null)
        {
            categoryName .Text = Session["categoryName "].ToString();
        }
    }