添加项目文件。

Mstn.Toolkit/Helpers/SchemaHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+using Bentley.DgnPlatformNET;
+using Bentley.DgnPlatformNET.DgnEC;
+using Bentley.ECObjects.Schema;
+using Bentley.ECObjects.XML;
+using Bentley.MstnPlatformNET;
+
+namespace Mstn.Toolkit.Helpers
+{
+    public static class SchemaHelper
+    {
+        /// <summary>
+        /// 从xml文件中定义ECSchema
+        /// </summary>
+        /// <param name="xmlFilePath"></param>
+        /// <returns></returns>
+        public static IECSchema DefineECSchemaFromXml(string xmlFilePath)
+        {
+            string schemaXml = File.ReadAllText(xmlFilePath);//读取XML文件内容
+            ECSchemaXmlStringReader xmlReader = new ECSchemaXmlStringReader(schemaXml);//声明ECSchema阅读器
+            IECSchema deserializedSchema = xmlReader.Deserialize();//将EC Schema阅读器读取到的信息反序列化
+            return deserializedSchema;//返回ECSchema
+        }
+        /// <summary>
+        /// 导入
+        /// </summary>
+        /// <param name="testSchema"></param>
+        public static void ImportSchema(IECSchema testSchema)
+        {
+            DgnFile dgnFile = Session.Instance.GetActiveDgnFile();//获得当前激活的文件
+            SchemaImportStatus impStatus = DgnECManager.Manager.ImportSchema(testSchema, dgnFile, new ImportSchemaOptions());//导入ECSchema
+            MessageBox.Show("Schema Import Status:\n" + impStatus);//对话框输出导入是否成功
+        }
+
+    }
+}