图像重叠在asp.net中导出到excel时

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" height="66px" width="543px">
    <columns>
          
         <asp:BoundField DataField="MemberID" HeaderText="MemberID" 

                SortExpression="MemberID"/>
         
               <asp:TemplateField HeaderText="Photo" ItemStyle-Width="150" ItemStyle-Height="170">
                <itemtemplate>
                    <asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Bind("MemberPhoto") %>' />
                   <asp:Image ID="Image1" runat="server" ImageUrl='<%# "http://localhost:22749/DhaneraSite/" + Eval("MemberPhoto") %>'  Height="100px" Width="100px" />
                </itemtemplate>
            
            <asp:BoundField DataField="MemberName" HeaderText="MemberName" 

                SortExpression="MemberName" />
            <asp:BoundField DataField="MemberAddress" HeaderText="MemberAddress" 

                SortExpression="MemberAddress" />
            <asp:BoundField DataField="ContactNo1" HeaderText="ContactNo1" 

                SortExpression="ContactNo1" />
            <asp:BoundField DataField="ContactNo2" HeaderText="ContactNo2" 

                SortExpression="ContactNo2" />
            <asp:BoundField DataField="EmailID" HeaderText="EmailID" 

                SortExpression="EmailID" />
            <asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />
            <asp:BoundField DataField="Occupation" HeaderText="Occupation" 

                SortExpression="Occupation" />
               
        </columns>

    private void BindData()
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["cn"].ToString());
        string query = "SELECT * FROM AddressBook";
        SqlDataAdapter ad = new SqlDataAdapter(query, con);
        DataSet ds = new DataSet();
        ad.Fill(ds, "AddressBook");
        GridView1.DataSource = ds;
        GridView1.DataBind();
        
     
    }
    private string ConnectionString
    {
        get { return @"Server=localhost;Database=Dhanera;Trusted_Connection=true"; }

    }

 protected void btnexcel_Click(object sender, EventArgs e)
    {
        Response.Clear();
        Response.AddHeader("content-disposition", "attachment;filename=AddressBook.xls");
        Response.Charset = "";
       Response.ContentType = "application/vnd.xls";
       HttpContext.Current.Response.ContentType = "application/ms-excel";
       System.IO.StringWriter stringWrite = new System.IO.StringWriter();
       System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
        GridView1.RenderControl(htmlWrite);
        Response.Write(stringWrite.ToString());
        Response.End();
}