/// <summary>
/// 用==表示值被更改
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="obj"></param>
/// <param name="expression"></param>
public static void Change <T>(this T obj, Expression <Func <T, bool> > expression) where T : CRL.IModel, new()
{
if (expression.Body is BinaryExpression)
{
var Reflection = ReflectionHelper.GetInfo <T>();
BinaryExpression be = ((BinaryExpression)expression.Body);
MemberExpression mExp = (MemberExpression)be.Left;
string name = mExp.Member.Name;
var right = be.Right;
object value;
if (right is ConstantExpression)
{
ConstantExpression cExp = (ConstantExpression)right;
value = cExp.Value;
}
else
{
value = ConstantValueVisitor.GetParameExpressionValue(right);
//value = Expression.Lambda(right).Compile().DynamicInvoke();
}
//更改对象值
var pro = TypeCache.GetProperties(typeof(T), true);
var field = pro[name];
//field.TupleSetValue<T>(obj, value);
Reflection.GetAccessor(field.MemberName).Set((T)obj, value);
obj.SetChanges(name, value);
}
else
{
obj.Change <T, bool>(expression);
}
}
private IEnumerable <string> GetFunctionAliases(IParameterMetadataProvider ipmp)
{
if (ipmp == null || ipmp.Body.ParamBlock == null)
{
yield break;
}
var attributes = ipmp.Body.ParamBlock.Attributes;
foreach (var attributeAst in attributes)
{
var attributeType = attributeAst.TypeName.GetReflectionAttributeType();
if (attributeType == typeof(AliasAttribute))
{
var cvv = new ConstantValueVisitor {
AttributeArgument = true
};
for (int i = 0; i < attributeAst.PositionalArguments.Count; i++)
{
yield return(Compiler._attrArgToStringConverter.Target(Compiler._attrArgToStringConverter,
attributeAst.PositionalArguments[i].Accept(cvv)));
}
}
}
}
/// <summary>
/// 按匿名表达式更新
/// </summary>
/// <typeparam name="TResult"></typeparam>
/// <param name="expression"></param>
/// <param name="newExpress"></param>
/// <returns></returns>
public int Update <TResult>(Expression <Func <T, bool> > expression, Expression <Func <T, TResult> > newExpress)
{
var c = new ParameCollection();
if (newExpress.Body is NewExpression)
{
var newExp = newExpress.Body as NewExpression;
for (int i = 0; i < newExp.Members.Count; i++)
{
var m = newExp.Members[i];
var v = newExp.Arguments[i];
bool cos;
var value = ConstantValueVisitor.GetMemberExpressionValue(v, out cos);
c.Add(m.Name, value);
}
}
else if (newExpress.Body is MemberInitExpression)
{
var memberInitExp = (newExpress.Body as MemberInitExpression);
foreach (MemberAssignment m in memberInitExp.Bindings)
{
bool cos;
var value = ConstantValueVisitor.GetMemberExpressionValue(m.Expression, out cos);
c.Add(m.Member.Name, value);
}
}
var db = DBExtend;
var n = db.Update(expression, c);
return(n);
}
List <TModel> QueryFromCacheBase(Expression <Func <TModel, bool> > expression, out int total, int pageIndex = 0, int pageSize = 0)
{
total = 0;
#region KEY查找
if (expression.Body is BinaryExpression)
{
var binary = expression.Body as BinaryExpression;
if (binary.NodeType == ExpressionType.Equal)
{
if (binary.Left is MemberExpression)
{
var member = binary.Left as MemberExpression;
var primaryKey = TypeCache.GetTable(typeof(TModel)).PrimaryKey.MemberName;
if (member.Member.Name.ToUpper() == primaryKey.ToUpper())
{
var value = ConstantValueVisitor.GetParameExpressionValue(binary.Right).ToString();
//var value = (int)Expression.Lambda(binary.Right).Compile().DynamicInvoke();
var all = GetCache(CacheQuery());
if (all == null)
{
return(new List <TModel>());
}
if (all.ContainsKey(value))
{
total = 1;
return(new List <TModel>()
{
all[value]
});
}
return(new List <TModel>());
}
}
}
}
#endregion
var predicate = expression.Compile();
IEnumerable <TModel> data;
int cacheTotal = AllCache.Count();
if (CacheQueryAsParallel && cacheTotal > 100000)
{
data = AllCache.AsParallel().Where(predicate);
}
else
{
data = AllCache.Where(predicate);
}
total = data.Count();
if (pageIndex > 0)
{
//var data2 = Base.CutList(data, pageIndex, pageSize);
var data2 = data.Page(pageIndex, pageSize).ToList();
return(data2);
}
return(data.ToList());
}
List <TModel> QueryFromCacheBase(Expression <Func <TModel, bool> > expression, out int total, int pageIndex = 0, int pageSize = 0)
{
total = 0;
#region KEY查找
bool b;
var a = idExpressionCache.TryGetValue(expression.Body.ToString(), out b);
if (a)
{
var binary = expression.Body as BinaryExpression;
var value = LambdaQuery.ConstantValueVisitor.GetParameExpressionValue(binary.Right);
var list = QueryFormCacheById(value);
total = list.Count();
return(list);
}
if (expression.Body is BinaryExpression)
{
var binary = expression.Body as BinaryExpression;
if (binary.NodeType == ExpressionType.Equal)
{
if (binary.Left is MemberExpression)
{
var member = binary.Left as MemberExpression;
var primaryKey = TypeCache.GetTable(typeof(TModel)).PrimaryKey.MemberName;
if (member.Member.Name.ToUpper() == primaryKey.ToUpper())
{
idExpressionCache[expression.Body.ToString()] = true;
var value = ConstantValueVisitor.GetParameExpressionValue(binary.Right);
var list = QueryFormCacheById(value);
total = list.Count();
return(list);
}
}
}
}
#endregion
var predicate = expression.Compile();
IEnumerable <TModel> data;
int cacheTotal = AllCache.Count();
if (CacheQueryAsParallel && cacheTotal > 100000)
{
data = AllCache.AsParallel().Where(predicate);
}
else
{
data = AllCache.Where(predicate);
}
total = data.Count();
if (pageIndex > 0)
{
//var data2 = Base.CutList(data, pageIndex, pageSize);
var data2 = data.Page(pageIndex, pageSize).ToList();
return(data2);
}
return(data.ToList());
}
List <T> QueryFromCacheBase(Expression <Func <T, bool> > expression, out int total, int pageIndex = 0, int pageSize = 0)
{
total = 0;
#region KEY查找
if (expression.Body is BinaryExpression)
{
var binary = expression.Body as BinaryExpression;
if (binary.NodeType == ExpressionType.Equal)
{
if (binary.Left is MemberExpression)
{
var member = binary.Left as MemberExpression;
var primaryKey = TypeCache.GetTable(typeof(T)).PrimaryKey.MemberName;
if (member.Member.Name == primaryKey)
{
var value = ConstantValueVisitor.GetParameExpressionValue(binary.Right);
var item = QueryFormCacheById(value);
var list = new List <T>();
if (item != null)
{
list.Add(item);
}
total = list.Count();
return(list);
}
}
}
}
#endregion
var predicate = expression.Compile();
IEnumerable <T> data;
if (CacheQueryAsParallel && AllCacheCount > 100000)
{
data = AllCache.AsParallel().Where(predicate);
}
else
{
data = AllCache.Where(predicate);
}
total = data.Count();
if (pageIndex > 0)
{
//var data2 = Base.CutList(data, pageIndex, pageSize);
var data2 = data.Page(pageIndex, pageSize).ToList();
return(data2);
}
return(data.ToList());
}
CRLExpression MemberExpressionHandler(Expression exp, ExpressionType?nodeType = null)
{
MemberExpression mExp = (MemberExpression)exp;
if (mExp.Expression != null && mExp.Expression.NodeType == ExpressionType.Parameter) //like b.Name==b.Name1 或b.Name
{
return(new CRLExpression()
{
Type = CRLExpressionType.Name, Data = mExp.Member.Name
});
}
//var obj = Expression.Lambda(mExp).Compile().DynamicInvoke();
var obj = ConstantValueVisitor.GetParameExpressionValue(mExp);
if (obj is Enum)
{
obj = (int)obj;
}
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = obj
});
}
CRLExpression MethodCallExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
MethodCallExpression mcExp = (MethodCallExpression)exp;
if (mcExp.Object is MemberExpression)
{
var mExp = mcExp.Object as MemberExpression;
if (mExp.Expression.NodeType != ExpressionType.Parameter)
{
//not like b.BarCode.Contains("abc")
//按变量或常量编译值
var obj = ConstantValueVisitor.GetParameExpressionValue(exp);
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = obj
});
}
}
else if (mcExp.Object is ConstantExpression)
{
//var cExp = mcExp.Object as ConstantExpression;
//like b.BarCode == aa()
var obj = ConstantValueVisitor.GetParameExpressionValue(exp);
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = obj
});
}
string methodName = mcExp.Method.Name;
string field = "";
List <object> args = new List <object>();
if (mcExp.Object == null)
{
field = RouteExpressionHandler(mcExp.Arguments[0]).Data.ToString();
}
else
{
field = mcExp.Object.ToString().Split('.')[1];
if (mcExp.Arguments.Count > 0)
{
var obj = ConstantValueVisitor.GetParameExpressionValue(mcExp.Arguments[0]);
args.Add(obj);
}
//args.Add(Expression.Lambda(mcExp.Arguments[0]).Compile().DynamicInvoke());
}
if (mcExp.Arguments.Count > 1)
{
for (int i = 1; i < mcExp.Arguments.Count; i++)
{
var obj = ConstantValueVisitor.GetParameExpressionValue(mcExp.Arguments[i]);
args.Add(obj);
}
}
if (methodName == "Parse")
{
methodName = string.Format("To{0}", mcExp.Method.DeclaringType.Name);
}
var methodCall = string.Format("{0}|{1}|{2}", field, methodName, string.Join(",", args));
return(new CRLExpression()
{
Type = CRLExpressionType.MethodCall, Data = methodCall
});
throw new NotSupportedException("暂不支持");
}
CRLExpression RouteExpressionHandler(Expression exp, int level = 0)
{
if (exp is BinaryExpression)
{
BinaryExpression be = (BinaryExpression)exp;
level += 1;
return(BinaryExpressionHandler(be.Left, be.Right, be.NodeType, level));
}
else if (exp is MemberExpression)
{
MemberExpression mExp = (MemberExpression)exp;
if (mExp.Expression != null && mExp.Expression.NodeType == ExpressionType.Parameter) //like b.Name==b.Name1 或b.Name
{
return(new CRLExpression()
{
Type = CRLExpressionType.Name, Data = mExp.Member.Name
});
}
//var obj = Expression.Lambda(mExp).Compile().DynamicInvoke();
var obj = ConstantValueVisitor.GetParameExpressionValue(mExp);
if (obj is Enum)
{
obj = (int)obj;
}
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = obj
});
}
else if (exp is NewArrayExpression)
{
#region 数组
NewArrayExpression naExp = (NewArrayExpression)exp;
StringBuilder sb = new StringBuilder();
foreach (Expression expression in naExp.Expressions)
{
sb.AppendFormat(",{0}", RouteExpressionHandler(expression));
}
//return sb.Length == 0 ? "" : sb.Remove(0, 1).ToString();
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = sb.Length == 0 ? "" : sb.Remove(0, 1).ToString()
});
#endregion
}
else if (exp is MethodCallExpression)
{
MethodCallExpression mcExp = (MethodCallExpression)exp;
if (mcExp.Object is MemberExpression)
{
var mExp = mcExp.Object as MemberExpression;
if (mExp.Expression.NodeType != ExpressionType.Parameter)
{
//not like b.BarCode.Contains("abc")
//按变量或常量编译值
var obj = ConstantValueVisitor.GetParameExpressionValue(exp);
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = obj
});
}
}
else if (mcExp.Object is ConstantExpression)
{
//var cExp = mcExp.Object as ConstantExpression;
//like b.BarCode == aa()
var obj = ConstantValueVisitor.GetParameExpressionValue(exp);
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = obj
});
}
string methodName = mcExp.Method.Name;
string field = "";
List <object> args = new List <object>();
if (mcExp.Object == null)
{
field = RouteExpressionHandler(mcExp.Arguments[0]).ToString();
}
else
{
field = mcExp.Object.ToString().Split('.')[1];
var obj = ConstantValueVisitor.GetParameExpressionValue(mcExp.Arguments[0]);
args.Add(obj);
//args.Add(Expression.Lambda(mcExp.Arguments[0]).Compile().DynamicInvoke());
}
if (mcExp.Arguments.Count > 1)
{
for (int i = 1; i < mcExp.Arguments.Count; i++)
{
var obj = ConstantValueVisitor.GetParameExpressionValue(mcExp.Arguments[i]);
args.Add(obj);
}
}
var methodCall = string.Format("{0}|{1}|{2}", field, methodName, string.Join(",", args));
return(new CRLExpression()
{
Type = CRLExpressionType.MethodCall, Data = methodCall
});
throw new NotSupportedException("暂不支持");
}
else if (exp is ConstantExpression)
{
#region 常量
ConstantExpression cExp = (ConstantExpression)exp;
object value;
if (cExp.Value == null)
{
value = null;
}
else
{
value = cExp.Value.ToString();
}
//return value;
return(new CRLExpression()
{
Type = CRLExpressionType.Value, Data = value
});
#endregion
}
else if (exp is UnaryExpression)
{
UnaryExpression ue = ((UnaryExpression)exp);
level += 1;
return(RouteExpressionHandler(ue.Operand, level));
}
return(null);
}
