【场景】将套打导出生成图片
利用功能：[导出PDF以图片导出](https://wenku.my7c.com/article/380805823498323968?productLineId=1)
【案例】
<1>第一步，得到套打的页面json数据
参考[套打json页面](https://wenku.my7c.com/article/390832006529651968?productLineId=1)
<2>转换xaml为图片
```csharp
using Kingdee.BOS;
using Kingdee.BOS.Core.DynamicForm.PlugIn;
using Kingdee.BOS.Core.DynamicForm.PlugIn.Args;
using Kingdee.BOS.Http;
using Kingdee.BOS.JSON;
using Kingdee.BOS.Orm.DataEntity;
using Kingdee.BOS.ServiceHelper.Report;
using Kingdee.BOS.Util;
using System;
using System.Collections.Generic;
using System.IO;
namespace DynamicFormPlugIn.NotePrint
{
[Kingdee.BOS.Util.HotUpdate]
public class GeneratePicByNoteXamlPlugIn : AbstractDynamicFormPlugIn
{
public override void ButtonClick(ButtonClickEventArgs e)
{
if (string.Equals(e.Key, "F_BHR_ConvPicByXaml", StringComparison.OrdinalIgnoreCase))
{
/*
* 将套打json中的xaml页面转换为 图片
* 利用xaml 页面渲染技术，在服务端生成图片(画布),支持版本 202211
*/
string filePath = string.Format("E:\\Test\\{0}.json", "1");
string fileText = System.IO.File.ReadAllText(filePath);
JSONObject jsonObj = JSONObject.Parse(fileText);
if (!jsonObj.ContainsKey("pages"))
return;
Dictionary<string,object> pageArray = jsonObj["pages"] as Dictionary<string, object>;
List<string> pageXaml = new List<string>();
foreach (var pageItem in pageArray)
{
var pageObj = pageItem.Value as JSONObject;
string xaml = pageObj["xaml"].ToString();
pageXaml.Add(xaml);
}
var config = PrintServiceHelper.GetXamlTransformConfig(this.Context);
var imageList = GetImageByHttpHost(pageXaml, config);
if(imageList != null && imageList.Count >0)
{
imageList[0].Save(string.Format("E:\\Test\\{0}.webp", "1"));
}
}
}
/// <summary>
/// 通过Http服务将XAML转换为图片
/// </summary>
/// <param name="pageXAML">页面XAML列表</param>
/// <param name="dyXamlTransformConfig">转换配置信息</param>
/// <returns></returns>
private List<System.Drawing.Image> GetImageByHttpHost(List<string> pageXAML, DynamicObjectCollection dyXamlTransformConfig)
{
List<System.Drawing.Image> images = new List<System.Drawing.Image>();
Dictionary<string, string> dicConfig = new Dictionary<string, string>();
foreach (var item in dyXamlTransformConfig)
{
var key = item["FPARAMKEY"].ToString();
var value = item["FPARAMVALUE"].ToString();
dicConfig[key] = value;
}
JSONObject json = new JSONObject();
json.Add("config", dicConfig);
json.Add("xaml", pageXAML);
string url = string.Format("{0}://{1}:{2}/Image/XamlToBase64Image.kcapi",
KDConfiguration.Current.HttpServerScheme,
KDConfiguration.Current.HttpServerHost,
KDConfiguration.Current.FileConvertServiceJobPort);
string reqContent = JsonUtil.SerializeWithOutNull(json);
int timeOut = 10 * 60 * 1000;
string rtnJson = HttpUtil.PostJson(url, timeOut, reqContent);
var rtn = JsonUtil.DeserializeObject<GenericHttpResult<List<string>>>(rtnJson);
if (rtn.Code == (int)HttpResultCode.Success)
{
var base64ImageList = rtn.Data;
if (base64ImageList != null && base64ImageList.Count > 0)
{
foreach (var base64 in base64ImageList)
{
byte[] data = Convert.FromBase64String(base64);
using (MemoryStream ms = new MemoryStream(data))
{
using (var bmpTemp = new System.Drawing.Bitmap(ms))
{
var iamge = new System.Drawing.Bitmap(bmpTemp);
images.Add(iamge);
}
}
}
}
}
return images;
}
}
}
```
【效果】
【说明】
<1>如果是老版本客户，只能自己实现将xaml渲染为图片的功能，（不建议在代码中直接创建STA线程），使用WPF xaml做转换
<2>转换失败的问题，对照实现逻辑排查日志
有点灰技术了！
还要配置什么东西吗
