需要注意的点:
绘制出来的图上传至服务器导致服务器内存溢出，所以要把图片文件转换为字节流文件输出
1、后台API
cs
/// <summary>
/// 淘宝客商品分享
/// </summary>
/// <returns></returns>
[HttpGet]
[Route("tbkgoodsshare")]
[TenantSite]
public async Task<IHttpActionResult> TbkGoodsShareImage(string source, string picUrl, string title, string marketPrice, string buyPrice, string couponAmount, string buyUrl, string couponClickUrl)
{
ResultJsonModel respond = new ResultJsonModel();
Dictionary<string, object> data = new Dictionary<string, object>();
respond.data = data;
//模板图片
string imgmb = "http://cdn地址/imgs/hpxx/tbk_goods_fx.jpg";
//用户信息
TenantSiteModel tenantSite = ActionContext.ActionArguments[ApiConsts.CurrentTenantSite] as TenantSiteModel;
string u_key = ActionContext.ActionArguments[ApiConsts.UserLoginKey] as string;
var udata = await _userSessionCacheManager.GetCurentUsersFromCache(u_key);
#region 合成图片
//模板图
Stream stream = ImageHelper.help.GetRemoteImage(imgmb);
if (stream == null)
{
respond.msg = "模板图片不存在";
return Ok(respond);
}
//产品主图
Stream streampic = ImageHelper.help.GetRemoteImage(picUrl);
if (streampic == null)
{
respond.msg = "产品图片不存在";
return Ok(respond);
}
Image origina = Image.FromStream(stream);
Image pimg = Image.FromStream(streampic);
stream.Close();
streampic.Close();
Graphics g = Graphics.FromImage(origina);
//绘制产品主图
g.DrawImage(pimg, 35, 150, 560, 560);
//绘制二维码
var qcodeurl = string.Empty;
if (string.IsNullOrEmpty(couponClickUrl))
qcodeurl = buyUrl;
else
qcodeurl = couponClickUrl;
Bitmap bmp = QRcodeHelper.CreateQRcode(qcodeurl, 11);
g.DrawImage(bmp, 448, 770, 153, 153);
//绘制产品标题
var goodsname = title.Length > 36 ? title.Substring(0, 36) : title;
TextFormatFlags flags = TextFormatFlags.WordBreak;
Rectangle rect = new Rectangle(22, 769, 400, 108);
TextRenderer.DrawText(g, goodsname, new Font("微软雅黑", 20, FontStyle.Regular, GraphicsUnit.Pixel), rect, Color.FromArgb(56, 56, 56), flags);
//绘制来源
Pen pen = new Pen(Color.FromArgb(240, 37, 154), 2);
RectangleF drawRect = new RectangleF(28, 890, 35, 20);
g.DrawRectangle(pen, 22, 885, 46, 27);
// Set format of string.
StringFormat drawFormat = new StringFormat();
drawFormat.Alignment = StringAlignment.Center;
// Draw string to screen.
g.DrawString(source, new Font("微软雅黑", 13, FontStyle.Bold, GraphicsUnit.Pixel), new SolidBrush(Color.FromArgb(240, 37, 154)), drawRect, drawFormat);
//绘制会员名
g.DrawString("来自[" + udata.nick_name + "]的贴心推荐", new Font("微软雅黑", 15, FontStyle.Regular, GraphicsUnit.Pixel), new SolidBrush(Color.FromArgb(147, 147, 147)), new Rectangle(190, 117, 260, 36));
//绘制价格
g.DrawString("￥ ", new Font("微软雅黑", 25, FontStyle.Regular, GraphicsUnit.Pixel), new SolidBrush(Color.FromArgb(240, 37, 154)), new Rectangle(100, 918, 35, 30));
g.DrawString(string.Format("{0:F}", Convert.ToDecimal(buyPrice) / 100), new Font("微软雅黑", 35, FontStyle.Regular, GraphicsUnit.Pixel), new SolidBrush(Color.FromArgb(240, 37, 154)), new Rectangle(120, 908, 90, 40));
//绘制市场价
g.DrawString("原价:￥" + string.Format("{0:F}", Convert.ToDecimal(marketPrice) / 100), new Font("微软雅黑", 20, FontStyle.Strikeout, GraphicsUnit.Pixel), new SolidBrush(Color.FromArgb(154, 154, 154)), new Rectangle(220, 918, 200, 40));
//绘制优惠券
g.DrawString(string.Format("{0:F}", couponAmount) + "元券", new Font("微软雅黑", 18, FontStyle.Regular, GraphicsUnit.Pixel), new SolidBrush(Color.FromArgb(255, 255, 255)), new Rectangle(53, 965, 70, 25));
MemoryStream ms = new MemoryStream();
origina.Save(ms, ImageFormat.Jpeg);
g.Dispose();
origina.Dispose();
pimg.Dispose();
#endregion
byte[] imgbt = ms.GetBuffer();
string base64Str = Convert.ToBase64String(imgbt);
data.Add(ResultData.data_key.ToString(), base64Str);
respond.code = ResultCode.Correct;
respond.msg = "success";
return Ok(respond);
}2、前台页面css
css
.pop_bg {
position: fixed;
left: 0;
top: 0;
width: 100%;
height: 100%;
background-color: rgba(0,0,0,0.5);
z-index: 100;
}
.pop_bg .pop_img {
position: absolute;
left: 15%;
right: 15%;
top: 15%;
border-radius: 10px;
overflow: hidden;
}
.pop_bg .pop_img img {
width: 100%;
}
.pop_bg .pop_img i {
position: absolute;
right: 4px;
top: 4px;
background: url(../imgs/hpxx/close.png) no-repeat center center;
background-size: 22px 22px;
width: 30px;
height: 30px;
}
.free_ad { width: 100%;
position: absolute;
left: 0;
bottom: 10px;
color: #393b91;
font-size: 14px;
text-align: center;
}3、页面
html
<div class="pop_bg" style="display:none;">
<div class="pop_img">
<img class="fxewm" src=""><i class="close"></i>
<p class="free_ad">长按保存图片</p>
</div>
</div>4、js
javascript
<script type="text/javascript">
$(function () {
$.ajax({
type: 'get',
url: $f.apihost + 'uinfo/tbkgoodsshare',
data: {
"source": "天猫",
"picUrl": "https://cdn地址/i4/2452755802/O1CN01M4XigM1sjMZSkkKnz_!!0-item_pic.jpg",
"title": "可水洗家务清洁懒人抹布厨房无纺布巾干湿两用家用纸一次性洗碗布10.5",
"marketPrice": "48",
"buyPrice": "16.10",
"buyUrl": "//s.click.taobao.com/t?e=m=2&s=KK/DZMDacwBw4vFB6t2Z2ueEDrYVVa64Dne87AjQPk9yINtkUhsv0IArzX8noqdbhTHH3SLdpkDa7xIGlJ/ezzgsLdZJzm/P5n09zUy+/CDQixZmXtrdQDZvalXXivAGUyNpxLfgKr0jWpzpm6nEC1Y7oKTxnsCvgFxgvEFCbV34JvEYI/fYOLw/+331Bhx4osKHgik4TatPhItcl68Yp8Yl7w3/A2kb&union_lens=lensId:MAPI@1587813481@0b58a109_0e94_171b10efde4_2eeb@01",
"couponAmount": "3",
"couponClickUrl": "www.baidu.com",
},
success: function (data) {
if (data.code == 1) {
$(".fxewm").attr("src", "data:image/jpeg;base64," + data.data.data_key);
$(".pop_bg").show();
}
},
complete: function () {
$.hideLoading();
}
});
});
</script>