Passing 3textbox Values into another page using query string

Question

I am trying to pass values from my gridview to another form but the problem that i have 3 textboxes with the same column name.. so i need to take the first value to the first textbox and second value to the second textbox etc...

 

Mycode in gridview is :

<asp:HyperLinkField Text="Edit" Target="_blank" DataNavigateUrlFields="StdId,Student Name,Gender,Date Of Birth,School,Phone Number1,Email,Start Date" DataNavigateUrlFormatString="NewStd.aspx?StdId={0}&Student Name={1}&Gender={2}&Date Of Birth={3}&School={4}&Phone Number1={5}&Email={6}&Start Date={7}" />

In my second form when page loads:

if (!IsPostBack)
{
string id = Request.QueryString["StdId"];
Label2.Text = id;
firstxt.Text + midtxt.Text + Lasttext.Text = Request.QueryString["Student Name"];
// error in this code
Genderdroplist.SelectedValue= Request.QueryString["Gender"];
DOBTxt.Text = Request.QueryString["Date Of Birth"];
Schooltxt.Text = Request.QueryString["School"];
Numbertxt.Text = Request.QueryString["Phone Number1"];
EmailTxt.Text = Request.QueryString["Email"];
StartDatetxt.Text = Request.QueryString["Start Date"];
}

so the problem is in the student name field with these 3 textboxes..

 

any help please with this code.

thanks