删除Gridview中的行

我有一个问题，删除gridview行。我通过在下拉列表中选择值来填充我的gridview，然后通过单击add按钮，值将被添加到我的gridview中，这是我的代码:

In my aspx:

<asp:GridView ID="GridView1" runat="server" 
            CssClass="mGrid" EmptyDataText = "There are no records to display">
            <Columns>
                <asp:TemplateField ItemStyle-Width="10">
        <HeaderTemplate>
        </HeaderTemplate>
        <ItemTemplate>
            <asp:CheckBox ID="CheckBox1" runat="server"/>
        </ItemTemplate>
    </asp:TemplateField>
            </Columns>
</asp:GridView>

protected void Page_Load(object sender, EventArgs e)
{
  if (!IsPostBack)
    {
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        DataColumn dc = new DataColumn("Id");
        DataColumn dc1 = new DataColumn("Name");
        //DataColumn dc2 = new DataColumn("Id");
        dt.Columns.Add(dc);
        dt.Columns.Add(dc1);
       // dt.Columns.Add(dc2);
        ds.Tables.Add(dt);
        Session["data"] = ds;
        GridView1.DataBind();
    }
}
protected void btnSave_Click(object sender, EventArgs e)
{
    SqlConnection con = new SqlConnection("Data Source=GATE-PC''SQLEXPRESS;Initial Catalog=dbProfile;Integrated Security=True");
    con.Open();
    foreach (GridViewRow row in GridView1.Rows)
    {
        SqlCommand cmdd = new SqlCommand("Insert into Profile (Id, profile_Id)VALUES(@id, @pid)", con); 
        cmdd.CommandType = System.Data.CommandType.Text;
        cmdd.Parameters.AddWithValue("@id", row.Cells[1].Text);
        cmdd.Parameters.AddWithValue("@pid", txtbid.Text);
        cmdd.ExecuteNonQuery();
    }
}
protected void btnAdd_Click(object sender, EventArgs e)
{
    DataSet ds = (DataSet)Session["data"];
    DataRow dr = ds.Tables[0].NewRow();
    dr[0] = DropDownList1.Text.Trim();
    dr[1] = DropDownList1.SelectedItem;
    //dr[2] = txtId.Text.Trim();
    ds.Tables[0].Rows.Add(dr);
    GridView1.DataSource = ds;
    GridView1.DataBind();
}

现在，我试图删除检查行在我的gridview与此代码:

protected void btnRemove_Click(object sender, EventArgs e)
{
    ArrayList del = new ArrayList();
    foreach (GridViewRow row in GridView1.Rows)
    {
        if (row.RowType == DataControlRowType.DataRow)
        {
            CheckBox chkDelete = (CheckBox)row.Cells[0].FindControl("CheckBox1");
            if (chkDelete != null)
            {
                if (chkDelete.Checked)
                {
                    string id = row.Cells[1].Text;
                    del.Add(id);
                }
            }
        }
    }
    GridView1.DataBind();
}

使用上面的btnRemove代码，如果我点击它，它会删除我的gridview中的所有值，即使是未选中的行，我想要的只是选中的行，而不是全部。还有其他简单的方法来删除行在gridview比使用复选框?我正在使用c#和asp.net。