添加项目文件。

HT.Cloud.Data/DBContext/DBContexHelper.cs

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+using SqlSugar;
+using System;
+using System.Linq;
+using HT.Cloud.Code;
+
+namespace HT.Cloud.DataBase
+{
+	public class DBContexHelper
+	{
+		private static string defaultDbType = GlobalContext.SystemConfig.DBProvider;
+		private static string defaultDbConnectionString = GlobalContext.SystemConfig.DBConnectionString;
+
+		public static ConnectionConfig Contex(string ConnectStr = "", string providerName = "")
+		{
+			ConnectStr = string.IsNullOrEmpty(ConnectStr) ? defaultDbConnectionString : ConnectStr;
+			providerName = string.IsNullOrEmpty(providerName) ? defaultDbType : providerName;
+			var dbType = Convert.ToInt32(Enum.Parse(typeof(DbType), providerName));
+			if (dbType == Convert.ToInt32(DbType.SqlServer))
+			{
+				return new ConnectionConfig()
+				{
+					DbType = (DbType)dbType,
+					InitKeyType = InitKeyType.Attribute,
+					IsAutoCloseConnection = true,
+					ConnectionString = ConnectStr,
+					MoreSettings = new ConnMoreSettings()
+					{
+						IsAutoRemoveDataCache = true//自动清理缓存
+					},
+					ConfigureExternalServices = new ConfigureExternalServices()
+					{
+						DataInfoCacheService = new SqlSugarCache(), //配置我们创建的缓存类
+						EntityService = (property, column) =>
+						{
+							var attributes = property.GetCustomAttributes(true);//get all attributes
+
+							if (attributes.Any(it => it is SugarColumn) && column.DataType == "longtext")
+							{
+								column.DataType = "nvarchar(4000)";
+							}
+						}
+					}
+				};
+			}
+			else
+			{
+				return new ConnectionConfig()
+				{
+					DbType = (DbType)dbType,
+					InitKeyType = InitKeyType.Attribute,
+					IsAutoCloseConnection = true,
+					ConnectionString = ConnectStr,
+					ConfigureExternalServices = new ConfigureExternalServices()
+					{
+						DataInfoCacheService = new SqlSugarCache() //配置我们创建的缓存类
+					},
+					MoreSettings = new ConnMoreSettings()
+					{
+						IsAutoRemoveDataCache = true//自动清理缓存
+					}
+				};
+			}
+		}
+	}
+}