how to show images in rad grid of telerik

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ASP.NET

Hello to all,
I am making an ASP.NET web application.
I am using the rad grid of telerik. In that grid I am also saving the path of image as i make a directory in which the images are saving and also images are saving in database.

Now i want that image should be visible in the grid but its not happening. On insert i am doing this.

protected void radgrid_InsertCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
    {
        GridEditFormInsertItem insertedItem = (GridEditFormInsertItem)e.Item;
        string txtmodalname = (insertedItem.FindControl("txtmodalname") as RadTextBox).Text;
        string txtqty = (insertedItem.FindControl("txtqty") as RadTextBox).Text;
        string txtprice = (insertedItem.FindControl("txtprice") as RadTextBox).Text;
        string category = (insertedItem.FindControl("cmbcategory") as RadComboBox).Text;
        string subcategory = (insertedItem.FindControl("subcategory") as RadComboBox).Text;
        RadUpload upload = (insertedItem.FindControl("RadUpload1") as RadUpload);
        string file = upload.UploadedFiles[0].FileName;
        int maxid = 0;
        SqlCommand cmd1 = con.CreateCommand();
        cmd1.CommandText = "select isnull(max(id),0) from itemadd";
        SqlDataReader dr1;
        dr1 = cmd1.ExecuteReader();

        while (dr1.Read())
        {
            maxid = int.Parse(dr1.GetInt32(0).ToString());
        }
        maxid = maxid + 1;


        if (upload.UploadedFiles.Count > 0)
        {
            string filename = upload.UploadedFiles[0].FileName;
        }

        string value = maxid + "," + txtmodalname + "," + category + "," + subcategory + "," + txtqty + "," + txtprice + "," +file ;
        ExecuteSP("id,modelname,category,subcategory,quantity,price,fileupload", value, "insertitem");

}

Please tell what will i have to do in design as well as in coding? whether i will have to save in this way to retrieve or any other way is there?