Web Forms :: Send TextBox Value To Another Page On Button Click

I have 2 page

1-index.aspx and 2-store.aspx and House_info Table

House_info table

Id Name Image Behcode

1 Jack 1.jpg 1111
2 Sara 2.jpg 2222
3 Andy 3.jpg 3333

 In index.aspx I have 1 TB and 1 Button I want when user type behcode

in TB and click on BUTTON it go to store.aspx page and fill this page with data from  

table House_info according to the behcode in this table

I know i should use querystring but here i have TB and i dont know how i can use it 

This is my store.aspx code

SqlConnection _cn = new SqlConnection(System.Web.Configuration.WebConfigurationManager.ConnectionStrings["behtopConnectionString"].ConnectionString);
protected void Page_Load(object sender, EventArgs e) {
SqlCommand _cmd = new SqlCommand("select * from House_Info _cn);

[Code] ....