public FileStreamResult GenerateImage(FormCollection collection)
{
var shopID = ShopCaches.GetShopInfo();
var imagePath = Server.MapPath(string.Format("~/UI/Images/PersonNoBarcode/{0}/{1}", shopID.ShopID, collection["inputGongHao"] + ".jpg"));//条形码
var imageInfo = Image.FromFile(imagePath);//转成图片类型
var headImgPath = Server.MapPath(string.Format("~/UI/Images/HeadFront/{0}/{1}", shopID.ShopID, collection["DaYinPersonnelID"] + ".jpg"));//头像
Image headImgInfo = null;
if (System.IO.File.Exists(headImgPath))
{
headImgInfo = Image.FromFile(headImgPath);
}
var filePath = Server.MapPath(string.Format("~/UI/Images/WorkCardPicture/{0}", shopID.ShopID));
if (!Directory.Exists(filePath))
Directory.CreateDirectory(filePath);
const int WIDTH = 350, HEIGHT = 230;
var font12B = new Font(FontFamily.GenericSerif, 12.0f, FontStyle.Regular);
var font20B = new Font(FontFamily.GenericSerif, 15.0f, FontStyle.Bold);

using (var bitmap = new Bitmap(WIDTH, HEIGHT))
{
using (Graphics garphics = Graphics.FromImage(bitmap))
{
garphics.Clear(Color.White);
garphics.DrawString(shopID.ShopName, font20B, Brushes.Black, 126, 10);
if (headImgInfo!=null)
{
garphics.DrawImage(headImgInfo,28,57,80,100); //照片
}
garphics.DrawString("工号：" + collection["inputGongHao"], font12B, Brushes.Black, 197, 53);
garphics.DrawString("姓名：" + collection["inputXingMing"], font12B, Brushes.Black, 197, 78);
garphics.DrawString("职位：" + collection["inputZhiWei"], font12B, Brushes.Black, 197, 103);
garphics.DrawImage(imageInfo, new Point(197, 151)); //条码

bitmap.Save(filePath + "/" + collection["inputGongHao"] + ".jpg");
}
}
var path = filePath + "\\" + collection["inputGongHao"] + ".jpg";
return File(new FileStream(path, FileMode.Open), "application/octet-stream");
}

画一张图片（包括图片，文字）