Pass aspx form value to aspx.cs variable

Question

How do you pass an aspx form value to aspx.cs variable. When I am on page 1 and select item 1, I'd like the value of PROC1 to be sent to the next page. I don't know how to accept it.

aspx form (page1.aspx)

<select>
  <option value="" disabled="disabled" selected="selected">Please select a name</option>
  <option value="PROC1">item 1</option>
  <option value="PROC2">item 2</option>
</select>
<input type="submit" value="Submit" />

receiving c# class (page2.aspx)

 protected void Page_Load(object sender, EventArgs e)
 {
      // I want to know how to capture the value of PROC1 
      // so I can use it as a variable on this new page
 }

Answer 1

First you need to give your form element a name attribute. This is the "key" in the key/value pairs that forms send to the server:

<select name="someSelect">

Then when this form posts to a page, you can access the form values in the Request object on that page:

var selectedValue = Request.Form["someSelect"];