<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
    <asp:TemplateField>
     <ItemTemplate>
     <asp:RadioButton ID="rbStudent" runat="server" />
     </ItemTemplate>
    </asp:TemplateField>

    <asp:BoundField DataField="SName" HeaderText="用户名" />
    <asp:BoundField DataField="SSex" HeaderText="性别" />
    </Columns>
    </asp:GridView>

public class Student
  {
    public string SID { get; set; }
    public string SName { get; set; }
    public string SSex { get; set; }
  }

protected void Page_Load(object sender, EventArgs e)
    {
      if (!IsPostBack)
      {
        this.BindGridView();
      }
    }

    public void BindGridView()
    {
      List<Student> sList = new List<Student>()
      {
        new Student(){ SID = "s001", SName="张三", SSex="男"},
        new Student(){ SID = "s002", SName="李四", SSex="女"},
        new Student(){ SID = "s003", SName="王五", SSex="男"}
      };

      GridView1.DataSource = sList;
      GridView1.DataBind();
    }

<table cellspacing="0" rules="all" border="1" id="GridView1" style="border-collapse:collapse;">
    <tr>
      <th scope="col"> </th><th scope="col">用户名</th><th scope="col">性别</th>
    </tr><tr>
      <td>
     <input id="GridView1_rbStudent_0" type="radio" name="GridView1$ctl02$rbStudent" value="rbStudent" />
     </td><td>张三</td><td>男</td>
    </tr><tr>
      <td>
     <input id="GridView1_rbStudent_1" type="radio" name="GridView1$ctl03$rbStudent" value="rbStudent" />
     </td><td>李四</td><td>女</td>
    </tr><tr>
      <td>
     <input id="GridView1_rbStudent_2" type="radio" name="GridView1$ctl04$rbStudent" value="rbStudent" />
     </td><td>王五</td><td>男</td>
    </tr>
  </table>

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
      if (e.Row.RowType == DataControlRowType.DataRow)
      {
        RadioButton RadioButtionRB = (RadioButton)e.Row.FindControl("rbStudent");
        RadioButtionRB.Attributes["name"] = "student";
      }
    }

<span name="student"><input id="GridView1_rbStudent_0" type="radio" name="GridView1$ctl02$rbStudent" value="rbStudent" /></span>
     </td><td>张三</td><td>男</td>
    </tr><tr>
      <td>
     <span name="student"><input id="GridView1_rbStudent_1" type="radio" name="GridView1$ctl03$rbStudent" value="rbStudent" /></span>
     </td><td>李四</td><td>女</td>
    </tr><tr>
      <td>
     <span name="student"><input id="GridView1_rbStudent_2" type="radio" name="GridView1$ctl04$rbStudent" value="rbStudent" /></span>
     </td><td>王五</td><td>男</td>

 <script type="text/javascript">
    function SetRadioName() {
      var gv = document.getElementById("GridView1"); //获取GridView的客户端ID
      var myradio = gv.getElementsByTagName("input"); //获取GridView的Inputhtml
      for (var i = 0; i < myradio.length; i++) {
        if (myradio[i].type == 'radio')//hidden
        {
          myradio[i].setAttribute("name", "myradio");
        }
      }
    }
  </script>

 protected void Page_Load(object sender, EventArgs e)
    {
      if (!IsPostBack)
      {
        this.BindGridView();
        ScriptManager.RegisterStartupScript(this, this.GetType(), Guid.NewGuid().ToString(),
          "SetRadioName()", true);
      }
    }