ASP.net - Delete Image Photo From GridView

GridDemo.aspx

<script type="text/javascript">
    function deleteConfirm(pubid) {
        var result = confirm('Do You Really Want to Delete Record : ' + pubid + ' ?');
        if (result) {
            return true;
        }
        else {
            return false;
        }
    }


</script>

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<asp:GridView ID="gridView" DataKeyNames="GalleryId" runat="server"
        AutoGenerateColumns="False" ShowFooter="True" HeaderStyle-Font-Bold="true"
        onrowdeleting="gridView_RowDeleting"
        OnRowDataBound="gridView_RowDataBound" BackColor="White" BorderColor="#3366CC" 
        BorderStyle="None" BorderWidth="1px" CellPadding="4" 
            onselectedindexchanged="gridView_SelectedIndexChanged">
<Columns>

<asp:TemplateField HeaderText="GalleryId">
    <ItemTemplate>
        <asp:Label ID="txtGallId" runat="server" Text='<%#Eval("GalleryId") %>'/>
    </ItemTemplate>
</asp:TemplateField>

 <asp:TemplateField HeaderText="Photo">
      <ItemTemplate>
        <asp:Image ID="Image1" runat="server" ImageUrl='<%#Eval("ThumbnailImagePath") %>'></asp:Image>
     </ItemTemplate>
 </asp:TemplateField>


 <asp:TemplateField HeaderText="GalleryName">
      <ItemTemplate>
         <asp:Label ID="lblGallName" runat="server" Text='<%#Eval("GalleryName") %>'/>
     </ItemTemplate>
 </asp:TemplateField>

 <asp:TemplateField HeaderText="GalleryDesc">
     <ItemTemplate>
         <asp:Label ID="lblGallDesc" runat="server" Text='<%#Eval("GalleryDesc") %>'/>
     </ItemTemplate>
 </asp:TemplateField>

 <asp:TemplateField HeaderText="ThumbnailImagePath">
    <ItemTemplate>
        <asp:Label ID="lblThumbnailImagePath" runat="server" Text='<%#Eval("ThumbnailImagePath") %>' />
    </ItemTemplate>
 </asp:TemplateField>


 <asp:TemplateField HeaderText="GalleryImagePath">
    <ItemTemplate>
        <asp:Label ID="lblGalleryImagePath" runat="server" Text='<%#Eval("GalleryImagePath") %>' />
    </ItemTemplate>
 </asp:TemplateField>

    <asp:CommandField ButtonType="Button" HeaderText="Action" SelectText="Select" ShowSelectButton="True" />

     <asp:TemplateField HeaderText="Action">
    <ItemTemplate>
        <asp:Button ID="ButtonDelete" runat="server" CommandName="Delete"  Text="Delete"  Enabled="False" />
    </ItemTemplate>
 </asp:TemplateField>

    

 </Columns>

    <FooterStyle BackColor="#99CCCC" ForeColor="#003399" />

<HeaderStyle Font-Bold="True" BackColor="#003399" ForeColor="#CCCCFF"></HeaderStyle>
    <PagerStyle BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
    <RowStyle BackColor="White" ForeColor="#003399" />
    <SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
    <SortedAscendingCellStyle BackColor="#EDF6F6" />
    <SortedAscendingHeaderStyle BackColor="#0D4AC4" />
    <SortedDescendingCellStyle BackColor="#D6DFDF" />
    <SortedDescendingHeaderStyle BackColor="#002876" />
</asp:GridView>



GridDemo.aspx.cs

protected void gridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        try
        {
            //string filePathThumb = Server.MapPath(gridView.DataKeys[e.RowIndex].Values["lblThumbnailImagePath"].ToString());
            //string filePathGal = Server.MapPath(gridView.DataKeys[e.RowIndex].Values["lblGalleryImagePath"].ToString());
            
            string filePathThumb = Server.MapPath(gridView.Rows[e.RowIndex].Cells[5].Text);
            string filePathGal = Server.MapPath(gridView.Rows[e.RowIndex].Cells[6].Text);


            if (File.Exists(filePathThumb))
            {
                File.Delete(filePathThumb);
            }

            if (File.Exists(filePathGal))
            {
                File.Delete(filePathGal);
            }

            int galid = General.ConvertToInt16(gridView.DataKeys[e.RowIndex].Values["GalleryId"]);
            string result = _dsGalMast.DeleteGalleryMasterData(galid);

            if (result == "PASS")
            {
                LoadPhotoAlbum();
                MessageBoxShow("GalleryID: " + galid + "<br>Photo Deleted Successfully.!", "SUCCESS", "SHOW");
            }
            else
            {
                MessageBoxShow("Some Error.?" + result, "FAIL", "SHOW");
            }
        }
        catch (Exception ex)
        {
            MessageBoxShow(ex.Message, "FAIL", "SHOW");
        }

    }


------------------


protected void gridView_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            int galid = General.ConvertToInt16(DataBinder.Eval(e.Row.DataItem, "GalleryId"));
            Button lnkbtnresult = (Button)e.Row.FindControl("ButtonDelete");
            if (lnkbtnresult != null)
            {
                lnkbtnresult.Attributes.Add("onclick", "javascript:return deleteConfirm('" + galid + "')");
            }
        }

    }


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