public static ExcelItem GetValue2(dynamic item, string expression)
{
var result = new ExcelItem();
var frontStr = "{";
var endStr = "}";
if (expression.Contains(frontStr) && expression.Contains(endStr))
{
//字符串表达式，如工资，工资-社保-公积金
var expressionStr = GetMiddleString(expression, frontStr, endStr);
//计算表达式
var caculateExpression = expressionStr;
//按属性长度倒序排序的属性集合，满足表达式的最长匹配
var orderedPropertyList = ((IDictionary <String, Object>)item).OrderByDescending(p => p.Key.Length).ToList();
//用数据替换属性，得到表达式
foreach (var property in orderedPropertyList)
{
caculateExpression = caculateExpression.Replace(property.Key, property.Value?.ToString());
}
//运算符集合
List <string> operatorList = new List <string>()
{
"+", "-", "*", "/", "%"
};
//判断表达式是否包含运算符
if (operatorList.Any(p => expressionStr.Contains(p)))
{
//包含运算符
//计算表达式
result.Value = Eval(caculateExpression);
result.IsContainsOperator = true;
}
else
{
//不包含运算符
result.Value = caculateExpression;
result.IsContainsOperator = false;
}
}
else
{
result = item.expression;
}
return(result);
}
/// <summary>
/// 根据表达式计算结果
/// </summary>
/// <param name="item">数据源</param>
/// <param name="expression">表达式，用大括号包含，如：工号{工号}、实发{工资-社保-公积金}</param>
/// <returns></returns>
public static ExcelItem GetValue(dynamic item, string expression)
{
var result = new ExcelItem();
result.IsContainsOperator = expression.IndexOf("+") > -1;
var frontStr = "{";
var endStr = result.IsContainsOperator ? "+" : "}";
var expressionStr = GetMiddleString(expression, frontStr, endStr);
var itemAdDict = ((IDictionary <String, Object>)item);
object value;
if (itemAdDict.TryGetValue(expressionStr, out value))
{
result.Value = value?.ToString();
}
return(result);
}