c# - asp.net gridview からデータベースに画像を挿入する

Question

以下は私のUIとテーブルです。データベースにも保存されるグリッドビュー内に子の画像を挿入したかったのです。これを達成する方法を教えてください。

テーブルのイメージのデータ型はvarchar(MAX)です。

これが私がこれまでに行ったことです。

(C# コード)

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Data;
  using System.Data.SqlClient;
  using System.IO;
  using System.Configuration;

  namespace MyProject
  {
public partial class managechild : System.Web.UI.Page
{

SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["lolConnectionString1"].ConnectionString);
protected void Page_Load(object sender, EventArgs e)
{

    if (!IsPostBack)
    {           
        BindGrid();
    }
} 
protected void BindGrid()
{
    string session = System.Web.HttpContext.Current.User.Identity.Name;
    Response.Cookies["uname"].Value = session;

    DataSet ds = new DataSet();
    conn.Open();
    string cmdstr = "SELECT * from child c join parent p on c.ParentId = p.ParentId join login l on l.Username = p.UserId where l.Username ='" + session + "'";
    SqlCommand cmd = new SqlCommand(cmdstr, conn);
    SqlDataAdapter adp = new SqlDataAdapter(cmd);
    adp.Fill(ds);
    gvUpload.DataSource = ds;
    gvUpload.DataBind();
    conn.Close();
}

protected void btnUpload_OnClick(object sender, EventArgs e)
{
        TextBox txtName = (TextBox)gvUpload.SelectedRow.FindControl("ChildName");
        FileUpload fuploadFile = (FileUpload)gvUpload.SelectedRow.FindControl("fUpload");
        Button btnUpload = (Button)gvUpload.SelectedRow.FindControl("btnUpload");

if (fuploadFile.HasFile)
{               
    string fileName = fuploadFile.FileName;
    string exten = Path.GetExtension(fileName); 
    //here we have to restrict file type            
    exten = exten.ToLower();
    string[] acceptedFileTypes = new string[4];            
    acceptedFileTypes[0] = ".jpg";
    acceptedFileTypes[1] = ".jpeg";
    acceptedFileTypes[2] = ".gif";
    acceptedFileTypes[3] = ".png";                               
    bool acceptFile = false;              
    for (int i = 0; i <= 3; i++)
    {
        if (exten == acceptedFileTypes[i])
        {                     
            acceptFile = true;
        }
    } 
    if (!acceptFile)
    {
        lblMsg.Text = "The file you are trying to upload is not a permitted file type!";
    }
    else
    {
        //upload the file onto the server                   
        fuploadFile.SaveAs(Server.MapPath("~/images/child/"+fileName));

        conn.Open();
        string cmdstr = "insert into Child (Image) values (@photo)";
        SqlCommand cmd = new SqlCommand(cmdstr, conn);
        cmd.Parameters.AddWithValue("@photo", "images/child/"+fileName);
        cmd.ExecuteNonQuery();
        conn.Close();
        BindGrid();
    }
}       
} 

}
}

UI コード (asp.net)

    <asp:GridView ID="gvUpload" runat="server" AutoGenerateColumns="False" 
                ShowFooter="True" CellPadding="4" ForeColor="#333333" GridLines="None" 
                style="margin-left: 128px">
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
   <Columns>
    <asp:TemplateField HeaderText="Child Name">
        <ItemTemplate>
            <asp:Label ID="lblName" runat="server" Text='<%#DataBinder.
                              Eval(Container.DataItem, "ChildName") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField> 
    <asp:TemplateField HeaderText="Image">
    <ItemTemplate>
         <asp:Image ID="imgPhoto" runat="server" Width="100px" Height="120px"
                 ImageUrl='<%#DataBinder.Eval(Container.DataItem, "Image") %>' />
    </ItemTemplate>
    <ItemTemplate>
         <asp:FileUpload ID="fUpload" runat="server" />
    </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField>
        <ItemTemplate>
            <asp:Button ID="btnUpload" runat="server" Text="Upload"
                                           OnClick="btnUpload_OnClick" />
        </ItemTemplate>
    </asp:TemplateField>
    </Columns>
            <EditRowStyle BackColor="#999999" />
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
            <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
            <SortedAscendingCellStyle BackColor="#E9E7E2" />
            <SortedAscendingHeaderStyle BackColor="#506C8C" />
            <SortedDescendingCellStyle BackColor="#FFFDF8" />
            <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
    </asp:GridView>