总有一些数据是需要批量更新的，并且更新的字段，每个数据都不一样。

为了实现这样一个功能，写了这样一个方法：

using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using NetRube.Data;
using PetaPoco;namespace NetRube.Utils
{/// <summary>/// 临时表工具类/// </summary>public class TempTableUtil{/// <summary>/// 获取字段名/// </summary>/// <typeparam name="T">数据表类</typeparam>/// <param name="colExp">表字段</param>/// <returns></returns>private static string GetColName<T>(Expression<Func<T, dynamic>> colExp) where T : IModel{var colName = "";if (colExp.Body is MemberExpression memberExpression)colName = memberExpression.Member.Name;else if (colExp.Body is UnaryExpression unaryExpression && unaryExpression.Operand is MemberExpression operandMemberExpression)colName = operandMemberExpression.Member.Name;return colName;}/// <summary>/// 获取表名与主键字段名/// </summary>/// <typeparam name="T">数据表类</typeparam>/// <param name="priColExpression">获取主键的Lambda表达式</param>/// <returns></returns>/// <exception cref="ArgumentException"></exception>private static (string, string) GetTableAndPrimaryColName<T>(Expression<Func<T, dynamic>> priColExpression) where T : IModel{T table = Activator.CreateInstance<T>();var type = table.GetType();var tableAttr = (TableNameAttribute)Attribute.GetCustomAttribute(type, typeof(TableNameAttribute));