增加一个图片列：

C#

        private void btnQuery_Click(object sender, EventArgs e)
        {
            StringBuilder sb=new StringBuilder ();
            sb.Append(" SELECT  序号, 品号,品名,客户品号,客户编码,客户名称,数量,币种,汇率,原币单价,原币总价,本币单价,本币总价,创建时间");
            sb.Append(" FROM  UF_Quotation");
            sb.Append(" where 1=1 ");
            if (txtItem.Text.Trim() != "") 
            {
                sb.Append(" and 品号 like '%" + txtItem.Text.Trim() + "%'");
            }
            if (txtItemName.Text.Trim() != "")
            {
                sb.Append(" and 品名 like '%" + txtItemName.Text.Trim() + "%'");
            }
        
            string dateStart= Convert.ToDateTime(dateTimePicker1.Text.Trim()).ToString("yyyy-MM-dd");
            string dateEnd = Convert.ToDateTime(dateTimePicker2.Text.Trim()).ToString("yyyy-MM-dd");
            sb.Append(" and convert(char(10),创建时间,120)>='"+dateStart+"'");
            sb.Append(" and convert(char(10),创建时间,120)<='" + dateEnd + "'");

            DataTable dt = new DataTable();
            dt= JB_QuotationDAL.QuotationList(sb.ToString());
            dt.Columns.Add("img", typeof(Image));
            foreach (DataRow row in dt.Rows)
            {
                if (File.Exists(@"D:\产品图片\" + row["品号"].ToString().Trim() + ".jpg"))
                {
                    //需要判断是否存在图片
                    Image img = Image.FromFile(@"D:\产品图片\" + row["品号"].ToString().Trim() + ".jpg");//双引号里是图片的路径
                    row["img"] = img;
                }
                else
                {
                    //需要判断是否存在图片
                    Image img = Image.FromFile(@"D:\产品图片\LOGO.jpg");//双引号里是图片的路径
                    row["img"] = img;
                }
                
            }
            dgvQuotation.DataSource = dt;
        }