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动态操作表结构相关的API

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d4ilys 2023-04-25 10:29:08 +08:00
parent 8bd85ebe22
commit 5046907e4f
1 changed files with 40 additions and 40 deletions
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80
FreeSql/Internal/DynamicCompileBuilder.cs
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@ -179,47 +179,47 @@ namespace FreeSql.Internal
return istance;
}
//设置动态对象的属性值，使用表达式目录树
public static object CreateObjectByType(Type type, Dictionary<string, object> porpertys)
{
if (type == null)
return null;
object istance = Activator.CreateInstance(type);
if (istance == null)
return null;
//根据字典中的key确定缓存
var cacheKeyStr = string.Join("-", porpertys.Keys.OrderBy(s => s));
var cacheKey = Md5Encryption(cacheKeyStr);
var dynamicDelegate = _delegateCache.GetOrAdd(cacheKey, key =>
{
//表达式目录树构建委托
var typeParam = Expression.Parameter(type);
var dicParamType = typeof(Dictionary<string, object>);
var dicParam = Expression.Parameter(dicParamType);
var exps = new List<Expression>();
var tempRef = Expression.Variable(typeof(object));
foreach (var pinfo in porpertys)
{
var propertyInfo = type.GetProperty(pinfo.Key);
if (propertyInfo == null)
continue;
var propertyName = Expression.Constant(pinfo.Key, typeof(string));
exps.Add(Expression.Call(dicParam, dicParamType.GetMethod("TryGetValue"), propertyName, tempRef));
exps.Add(Expression.Assign(Expression.MakeMemberAccess(typeParam, propertyInfo),
Expression.Convert(tempRef, propertyInfo.PropertyType)));
exps.Add(Expression.Assign(tempRef, Expression.Default(typeof(object))));
}
////设置动态对象的属性值，使用表达式目录树
//public static object CreateObjectByType(Type type, Dictionary<string, object> porpertys)
//{
// if (type == null)
// return null;
// object istance = Activator.CreateInstance(type);
// if (istance == null)
// return null;
// //根据字典中的key确定缓存
// var cacheKeyStr = string.Join("-", porpertys.Keys.OrderBy(s => s));
// var cacheKey = Md5Encryption(cacheKeyStr);
// var dynamicDelegate = _delegateCache.GetOrAdd(cacheKey, key =>
// {
// //表达式目录树构建委托
// var typeParam = Expression.Parameter(type);
// var dicParamType = typeof(Dictionary<string, object>);
// var dicParam = Expression.Parameter(dicParamType);
// var exps = new List<Expression>();
// var tempRef = Expression.Variable(typeof(object));
// foreach (var pinfo in porpertys)
// {
// var propertyInfo = type.GetProperty(pinfo.Key);
// if (propertyInfo == null)
// continue;
// var propertyName = Expression.Constant(pinfo.Key, typeof(string));
// exps.Add(Expression.Call(dicParam, dicParamType.GetMethod("TryGetValue"), propertyName, tempRef));
// exps.Add(Expression.Assign(Expression.MakeMemberAccess(typeParam, propertyInfo),
// Expression.Convert(tempRef, propertyInfo.PropertyType)));
// exps.Add(Expression.Assign(tempRef, Expression.Default(typeof(object))));
// }
var returnTarget = Expression.Label(type);
exps.Add(Expression.Return(returnTarget, typeParam));
exps.Add(Expression.Label(returnTarget, Expression.Default(type)));
var block = Expression.Block(new[] { tempRef }, exps);
var @delegate = Expression.Lambda(block, typeParam, dicParam).Compile();
return @delegate;
});
var dynamicInvoke = dynamicDelegate.DynamicInvoke(istance, porpertys);
return dynamicInvoke;
}
// var returnTarget = Expression.Label(type);
// exps.Add(Expression.Return(returnTarget, typeParam));
// exps.Add(Expression.Label(returnTarget, Expression.Default(type)));
// var block = Expression.Block(new[] { tempRef }, exps);
// var @delegate = Expression.Lambda(block, typeParam, dicParam).Compile();
// return @delegate;
// });
// var dynamicInvoke = dynamicDelegate.DynamicInvoke(istance, porpertys);
// return dynamicInvoke;
//}
/// <summary>
/// 首字母小写