Generate Thumbnail of Image whose path is stored in database in ASP.Net

Your Path is incomplete see

~/image/house/product/

It should be

~/image/house/product/Image.jpg

Take a referecnce from this code

HTML

<div>
    Normal Image
    <br />
    <asp:Image ID="Image1" ImageUrl="~/Images/Chrysanthemum.jpg" runat="server" />
    <br />
    Thumbnail Image
    <br />
    <asp:Image ID="Image2" runat="server" />
</div>

C#

protected void Page_Load(object sender, EventArgs e)
{
    this.Image2.ImageUrl = GetThumbNail("~/Images/Chrysanthemum.jpg");
}

public string GetThumbNail(string url)
{
    string path = Server.MapPath(url);
    System.Drawing.Image image = System.Drawing.Image.FromFile(path);
    using (System.Drawing.Image thumbnail = image.GetThumbnailImage(100, 100, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero))
    {
        using (MemoryStream memoryStream = new MemoryStream())
        {
            thumbnail.Save(memoryStream, ImageFormat.Png);
            Byte[] bytes = new Byte[memoryStream.Length];
            memoryStream.Position = 0;
            memoryStream.Read(bytes, 0, (int)bytes.Length);
            string base64String = Convert.ToBase64String(bytes, 0, bytes.Length);
            return "data:image/png;base64," + base64String;
        }
    }
}

public bool ThumbnailCallback()
{
    return false;
}

Screenshot