ADO.NET :: Fill .aspx Textbox From Entity Framework Model In VS10 C#

I am using C# with Entity Framework Model. I want to fill a textbox (tbPrepProbComment.Text ) with a string (S0PrepProbSolveComment) from a table (EightDProject). I'm getting the key for the EightDProject from a textbox (SelectTrackingNumber). I'm not sure my query is working because when I look at the query result ( project ) I see the error" 'mykey' could not be resolved in the current scope or context. Make sure that all referenced variables are in scope, that required schemas are loaded, and that namespaces are referenced correctly." If the query was working I dont know how to pull the field from the distinct row it should return and put it in the textbox. I've tried the line tbPrepProbComment.Text = project.S0PrepProbSolveComment; Here is my code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.Objects;
namespace EightD1
{
public partial class Page1 : System.Web.UI.Page
{
public int mykey;
public string comment;
public object obj;
// the entity framework model
EightDdbEntities EightDP = new EightDdbEntities();
protected void Page_Load(object sender, EventArgs e)
{
SelectTrackingNumber.Focus();
}
//When the project id has been selected get projectdata and bind to page data holders
protected void SelectTrackingNumber_TextChanged(object sender, EventArgs e)
{
BindData();
}
private void BindData()
{
try
{
mykey = Convert.ToInt32(SelectTrackingNumber.Text.ToString());
}
catch
{
mykey = 0;
}
ObjectQuery<EightDProject> project = EightDP.CreateQuery<EightDProject>(
"SELECT DISTINCT p FROM EightDProjects AS p WHERE p.EightDID = mykey ");
//tbPrepProbComment.Text = project.S0PrepProbSolveComment;
}
}
}