public string StringContains(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
string parName = string.Format("@contrains{0}", parIndex);
var args1 = args[0];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
addParame(parName, args1);
}
parIndex += 1;
if (nodeType == ExpressionType.Equal)
{
return(dBAdapter.StringContainsFormat(field, parName));
}
else
{
return(dBAdapter.StringNotContainsFormat(field, parName));
}
//return string.Format("CHARINDEX({1},{0})>0", field, parName);
}
public string Replace(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var args = methodInfo.Args;
string parName = string.Format("@repf{0}", parIndex);
var args1 = args[0];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
addParame(parName, args1);
}
var args2 = args[1];
parIndex += 1;
string parName2 = string.Format("@repd{0}", parIndex);
addParame(parName2, args2);
parIndex += 1;
//DateDiff(2015/2/5 17:59:44,t1.AddTime,@DateDiff1)>1
return(dBAdapter.Replace(field, parName, parName2));
}
/// <summary>
/// 字符串包含
/// </summary>
/// <param name="methodInfo"></param>
/// <param name="parIndex"></param>
/// <param name="addParame"></param>
/// <returns></returns>
public string Contains(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
var firstArgs = args.First();
if (firstArgs is IEnumerable && firstArgs.GetType() != typeof(string))//如果是集合,按in
{
return(In(methodInfo, ref parIndex, addParame));
}
string parName = GetParamName("contains", parIndex);
var args1 = args[0];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
addParame(parName, args1);
}
parIndex += 1;
if (nodeType == ExpressionType.Equal)
{
return(dBAdapter.StringContainsFormat(field, parName));
}
else
{
return(dBAdapter.StringNotContainsFormat(field, parName));
}
//return string.Format("CHARINDEX({1},{0})>0", field, parName);
}
public string Equals(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
string parName = string.Format("@equalEnum{0}", parIndex);
parIndex += 1;
var args1 = args[0];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
args1 = ObjectConvert.ConvertObject(args1.GetType(), args1);
addParame(parName, args1);
}
var operate = ExpressionVisitor.ExpressionTypeCast(nodeType);
return(string.Format("{0}{2}{1}", field, parName, operate));
//if (nodeType == ExpressionType.Equal)
//{
// return string.Format("{0}={1}", field, parName);
//}
//else
//{
// return string.Format("{0}!={1}", field, parName);
//}
}
string StringLikeFull(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame, string likeFormat)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args[0];
string parName = string.Format("@like{0}", parIndex);
parIndex += 1;
if (args is ExpressionValueObj)
{
parName = args.ToString();
//if (!parName.ToString().Contains("%"))
//{
// parName = string.Format(likeFormat, parName);
//}
}
else
{
if (!args.ToString().Contains("%"))
{
args = string.Format(likeFormat, args);
}
addParame(parName, args);
}
if (nodeType == ExpressionType.Equal)
{
return(dBAdapter.StringLikeFormat(field, parName));
}
else
{
return(dBAdapter.StringNotLikeFormat(field, parName));
}
//return string.Format("{0} LIKE {1}", field, parName);
}
public string StartsWith(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
var par = args[0].ToString();
string parName = string.Format("@StartsWith{0}", parIndex);
parIndex += 1;
var args1 = args[0];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
addParame(parName, par);
}
var str = dBAdapter.SubstringFormat(field, 0, par.Length);
var operate = ExpressionVisitor.ExpressionTypeCast(nodeType);
return(string.Format("{0}{2}{1}", str, parName, operate));
//if (nodeType == ExpressionType.Equal)
//{
// return string.Format("{0}={1}", str, parName);
//}
//else
//{
// return string.Format("{0}!={1}", str, parName);
//}
}
public string StringLike(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
return(StringLikeFull(methodInfo, ref parIndex, addParame, "%{0}%"));
}
public string IsNullOrEmpty(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var isNot = methodInfo.ExpressionType == ExpressionType.Not;
var notStr = dBAdapter.IsNotFormat(isNot);
var result = string.Format("({0} {1} null {3} {0}{2}'')", field, notStr, isNot ? "!=" : "=", isNot ? "and" : "or");
return(result);
}
public string IsNull(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var args = methodInfo.Args.First();
string parName = string.Format("@isnull{0}", parIndex);
parIndex += 1;
addParame(parName, args);
return(dBAdapter.IsNull(field, parName));
}
public string Substring(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
if (args.Count < 2)
{
throw new CRLException("Substring扩展方法需要两个参数,index,length");
}
return(dBAdapter.SubstringFormat(field, (int)args[0], (int)args[1]));
//return string.Format(" SUBSTRING({0},{1},{2})", field, args[0], args[1]);
}
public string CaseToType(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
if (string.IsNullOrEmpty(field))//按转换常量算
{
string parName = string.Format("@case{0}", parIndex);
parIndex += 1;
addParame(parName, methodInfo.Args.First());
field = parName;
}
return(dBAdapter.CastField(field, methodInfo.ReturnType));
}
public string In(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
string str = InFormat(args[0], ref parIndex, addParame);
if (nodeType == ExpressionType.Equal)
{
return(dBAdapter.InFormat(field, str));
}
else
{
return(dBAdapter.NotInFormat(field, str));
}
//return string.Format("{0} IN ({1})", field, str);
}
public string DateTimeDateDiff(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
string parName = string.Format("@DateDiff{0}", parIndex);
var args1 = args[0];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
addParame(parName, args[1]);
}
parIndex += 1;
//DateDiff(2015/2/5 17:59:44,t1.AddTime,@DateDiff1)>1
return(dBAdapter.DateDiffFormat(field, args[0].ToString(), parName));
//return string.Format("DateDiff({0},{1},{2}){3}", args[0], field, parName, args[2]);
}
public string Between(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args;
string parName = string.Format("@between{0}", parIndex);
var args1 = args[0];
var args2 = args[1];
if (args1 is ExpressionValueObj)
{
parName = args1.ToString();
}
else
{
addParame(parName, args1);
}
parIndex += 1;
string parName2 = string.Format("@between{0}", parIndex);
if (args2 is ExpressionValueObj)
{
parName2 = args2.ToString();
}
else
{
addParame(parName2, args2);
}
parIndex += 1;
if (nodeType == ExpressionType.Equal)
{
return(dBAdapter.BetweenFormat(field, parName, parName2));
}
else
{
return(dBAdapter.NotBetweenFormat(field, parName, parName2));
}
//return string.Format("{0} between {1} and {2}", field, parName, parName2);
}
string StringLikeFull(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame, string likeFormat)
{
var field = methodInfo.MemberQueryName;
var nodeType = methodInfo.ExpressionType;
var args = methodInfo.Args[0];
string parName = GetParamName("like", parIndex);
parIndex += 1;
if (args is ExpressionValueObj)//like 字段名 '%'+t1.[ProductName1]
{
parName = args.ToString();
likeFormat = likeFormat.Replace("%", "+'%'+");
parName = string.Format(likeFormat, parName);
parName = System.Text.RegularExpressions.Regex.Replace(parName, @"^\+", "");
parName = System.Text.RegularExpressions.Regex.Replace(parName, @"\+$", "");
}
else
{
if (!args.ToString().Contains("%"))
{
args = string.Format(likeFormat, args);
}
addParame(parName, args);
}
if (nodeType == ExpressionType.Equal)
{
return(dBAdapter.StringLikeFormat(field, parName));
}
else
{
return(dBAdapter.StringNotLikeFormat(field, parName));
}
//return string.Format("{0} LIKE {1}", field, parName);
}
public string StringLikeRight(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
//string str = args[0].ToString();
//str = str.Replace("%","");
return(StringLikeFull(methodInfo, ref parIndex, addParame, "{0}%"));
}
public string AVG(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
return(string.Format("avg({0})", field));
}
public string StartsWith(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
return(StringLikeRight(methodInfo, ref parIndex, addParame));
}
CRLExpression.CRLExpression MethodCallExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
#region methodCall
MethodCallExpression mcExp = (MethodCallExpression)exp;
var arguments = new List <object>();
var allArguments = new List <Expression>(mcExp.Arguments);
int argsIndex = 0;
Expression firstArgs;
bool isLambdaQueryJoinExt = false;
if (mcExp.Object == null) //区分静态方法还是实例方法
{
firstArgs = allArguments[0]; //like b.Name.IsNull("22")
argsIndex = 1;
if (firstArgs.Type.Name.Contains("LambdaQueryJoin"))
{
isLambdaQueryJoinExt = true;
}
}
else
{
firstArgs = mcExp.Object; //like b.Id.ToString()
if (allArguments.Count > 0 && (allArguments[0] is MemberExpression)) //like ids.Contains(b.Id)
{
var mexp2 = allArguments[0] as MemberExpression;
var firstArgsM = firstArgs as MemberExpression;
//var par2 = (ParameterExpression)mexp2.Expression;
if (mexp2.Expression is ParameterExpression && firstArgsM.Expression is ConstantExpression)
{
firstArgs = allArguments[0];
argsIndex = 1;
allArguments.Add(mcExp.Object);
if (firstArgs.Type.Name.Contains("LambdaQueryJoin"))
{
isLambdaQueryJoinExt = true;
}
}
}
}
#region MethodCallExpression
//bool isConstantMethod = false;
MemberExpression memberExpression;
string methodField = "";
string memberName = "";
string methodName = mcExp.Method.Name;
if (firstArgs is ParameterExpression || isLambdaQueryJoinExt)
{
var exp2 = mcExp.Arguments[1] as UnaryExpression;
var type = exp2.Operand.GetType();
var p = type.GetProperty("Body");
var exp3 = p.GetValue(exp2.Operand, null) as Expression;
methodField = RouteExpressionHandler(exp3).SqlOut;
memberName = "";
}
else if (firstArgs is UnaryExpression)//like a.Code.Count()
{
memberExpression = (firstArgs as UnaryExpression).Operand as MemberExpression;
memberName = memberExpression.Member.Name;
var field = TypeCache.GetProperties(memberExpression.Expression.Type, true)[memberName];
memberName = __DBAdapter.FieldNameFormat(field);
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
}
else if (firstArgs is BinaryExpression)
{
var be = firstArgs as BinaryExpression;
methodField = BinaryExpressionHandler(be.Left, be.Right, be.NodeType).Data.ToString();
}
else if (firstArgs is MemberExpression)
{
//like a.Code
memberExpression = firstArgs as MemberExpression;
memberName = memberExpression.Member.Name;
var type = memberExpression.Expression.Type;
if (type.IsSubclassOf(typeof(IModel)))
{
var field = TypeCache.GetProperties(type, true)[memberExpression.Member.Name];
memberName = __DBAdapter.FieldNameFormat(field);
}
if (memberExpression.Expression.NodeType == ExpressionType.Parameter)
{
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
//var allConstant = true;
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj);
}
}
else
{
//like Convert.ToDateTime(times)
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj2 = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj2);
}
}
}
else if (firstArgs is ConstantExpression)//按常量
{
//like DateTime.Parse("2016-02-11 12:56"),
//isConstantMethod = true;
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
}
//else
//{
// throw new CRLException("不支持此语法解析:" + args);
//}
if (nodeType == null)
{
nodeType = ExpressionType.Equal;
}
if (string.IsNullOrEmpty(methodField))
{
//当是常量转换方法
var method = mcExp.Method;
object obj = null;
if (method.IsStatic) //like DateTime.Parse("2016-02-11")
{
if (method.IsGenericMethod) //扩展方法,like public static bool Contains<TSource>(this IEnumerable<TSource> source, TSource value)
{
var valueObj = (ExpressionValueObj)arguments[1];
if (valueObj == null)
{
throw new Exception("不支持此语法:" + mcExp);
}
memberName = valueObj.member.Name;
arguments = new List <object>()
{
arguments[0]
};
methodField = valueObj.Value.ToString();
goto lable1;
}
else
{
obj = method.Invoke(null, arguments.ToArray());
}
}
else//like time.AddDays(1)
{
if (arguments.Count == 0)
{
throw new Exception("未能解析" + exp);
}
var args1 = arguments.First();
arguments.RemoveAt(0);
if (arguments.Count > 0)
{
if (arguments[0] is ExpressionValueObj)
{
throw new Exception("不支持这样的语法:" + exp);
}
}
obj = method.Invoke(args1, arguments.ToArray());
}
var exp2 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj
};
return(exp2);
}
lable1:
var methodInfo = new CRLExpression.MethodCallObj()
{
Args = arguments, ExpressionType = nodeType.Value, MemberName = memberName, MethodName = methodName, MemberQueryName = methodField
};
methodInfo.ReturnType = mcExp.Type;
#endregion
var exp4 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.MethodCall, Data = methodInfo
};
return(exp4);
#endregion
}
/// <summary>
///
/// </summary>
/// <param name="exp"></param>
/// <param name="nodeType"></param>
/// <param name="firstLevel">是否首次调用,来用修正bool一元运算</param>
/// <returns></returns>
public CRLExpression.CRLExpression RouteExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
if (exp is BinaryExpression)
{
BinaryExpression be = (BinaryExpression)exp;
return(BinaryExpressionHandler(be.Left, be.Right, be.NodeType));
}
else if (exp is MemberExpression)
{
//区分 属性表达带替换符{0} 变量值不带
#region Member
MemberExpression mExp = (MemberExpression)exp;
if (mExp.Expression != null && mExp.Expression.NodeType == ExpressionType.Parameter) //like b.Name==b.Name1 或b.Name
{
var fieldName = mExp.Member.Name;
var type = mExp.Expression.Type;
if (type.BaseType == typeof(object))//按匿名类
{
var queryField = FormatFieldPrefix(type, fieldName);
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = queryField
});
}
CRL.Attribute.FieldAttribute field;
var a = TypeCache.GetProperties(type, true).TryGetValue(fieldName, out field);
if (!a)
{
throw new CRLException("类型 " + type.Name + "." + fieldName + " 不是数据库字段,请检查查询条件");
}
if (!string.IsNullOrEmpty(field.VirtualField))//按虚拟字段
{
//return filed.VirtualField;
var queryField = field.VirtualField.Replace("{" + type.FullName + "}", Prefixs[type]);//替换前辍
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = queryField
});
}
var fieldStr = FormatFieldPrefix(type, field.MapingName);//格式化为别名
//return field;
if (firstLevel)
{
//修正bool值一元运算 t1.isTop=1
fieldStr += "=1";
}
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = fieldStr
});
}
#endregion
var obj = GetParameExpressionValue(mExp);
if (obj is Enum)
{
obj = (int)obj;
}
else if (obj is Boolean)//sql2000需要转换
{
obj = Convert.ToInt32(obj);
}
//return obj + "";
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.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));
}
var str = sb.Length == 0 ? "" : sb.Remove(0, 1).ToString();
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = str
});
#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 = GetParameExpressionValue(exp);
//return obj + "";
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj
});
}
}
else if (mcExp.Object is ConstantExpression)
{
//var cExp = mcExp.Object as ConstantExpression;
//like b.BarCode == aa()
var obj = GetParameExpressionValue(exp);
//return obj + "";
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj
});
}
//var _DBAdapter = DBAdapter.DBAdapterBase.GetDBAdapterBase(dbContext);
//var methodAnalyze = new CRL.LambdaQuery.MethodAnalyze(_DBAdapter);
#region 方法
//请扩展ExtensionMethod的方法
string methodName = mcExp.Method.Name;
parIndex += 1;
//var dic = MethodAnalyze.GetMethos(_DBAdapter);
//if (!dic.ContainsKey(methodName))
//{
// //return Expression.Lambda(exp).Compile().DynamicInvoke() + "";
// throw new CRLException("LambdaQuery不支持方法" + mcExp.Method.Name);
//}
string field = "";
#region par
List <object> args = new List <object>();
if (mcExp.Object == null)
{
field = RouteExpressionHandler(mcExp.Arguments[0]).Data.ToString();
}
else
{
field = mcExp.Object.ToString().Split('.')[1];
var mExpression = mcExp.Object as MemberExpression;
var type = mExpression.Expression.Type;
var filed2 = TypeCache.GetProperties(type, true)[field];
field = FormatFieldPrefix(type, filed2.MapingName);
if (mcExp.Arguments.Count > 0)
{
var obj = GetParameExpressionValue(mcExp.Arguments[0]);
args.Add(obj);
}
}
if (mcExp.Arguments.Count > 1)
{
for (int i = 1; i < mcExp.Arguments.Count; i++)
{
var obj = GetParameExpressionValue(mcExp.Arguments[i]);
args.Add(obj);
}
}
#endregion
//int newParIndex = parIndex;
if (nodeType == null)
{
nodeType = ExpressionType.Equal;
}
//var result = dic[methodName](field, nodeType.Value, ref newParIndex, AddParame, args.ToArray());
//parIndex = newParIndex;
//return result;
var methodInfo = new CRLExpression.MethodCallObj()
{
Args = args, ExpressionType = nodeType.Value, MemberName = field.Substring(field.LastIndexOf("}") + 1), MethodName = methodName, MemberQueryName = field
};
methodInfo.ReturnType = mcExp.Type;
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.MethodCall, Data = methodInfo
});
#endregion
}
else if (exp is ConstantExpression)
{
#region 常量
ConstantExpression cExp = (ConstantExpression)exp;
object returnValue;
if (cExp.Value == null)
{
returnValue = "null";
}
else
{
if (cExp.Value is Boolean)
{
returnValue = Convert.ToInt32(cExp.Value).ToString();
}
else if (cExp.Value is Enum)
{
returnValue = Convert.ToInt32(cExp.Value).ToString();
}
else
{
returnValue = cExp.Value;
}
}
return(new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = returnValue
});
#endregion
}
else if (exp is UnaryExpression)
{
UnaryExpression ue = ((UnaryExpression)exp);
if (ue.Operand is MethodCallExpression)
{
//方法直接下一步解析
return(RouteExpressionHandler(ue.Operand, ue.NodeType));
}
else if (ue.Operand is MemberExpression)
{
MemberExpression mExp = (MemberExpression)ue.Operand;
if (mExp.Expression.NodeType != ExpressionType.Parameter)
{
return(RouteExpressionHandler(ue.Operand));
}
var parameter = Expression.Parameter(mExp.Expression.Type, "b");
if (ue.NodeType == ExpressionType.Not)
{
var ex2 = parameter.Property(mExp.Member.Name).Equal(1);
return(RouteExpressionHandler(ex2));
}
else if (ue.NodeType == ExpressionType.Convert)
{
//like Convert(b.Id);
var ex2 = parameter.Property(mExp.Member.Name);
return(RouteExpressionHandler(ex2));
}
}
else if (ue.Operand is ConstantExpression)
{
return(RouteExpressionHandler(ue.Operand));
}
throw new CRLException("未处理的一元运算" + ue.NodeType);
}
else
{
throw new CRLException("不支持此语法解析:" + exp);
}
}
CRLExpression.CRLExpression MethodCallExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
#region methodCall
MethodCallExpression mcExp = (MethodCallExpression)exp;
var arguments = new List <object>();
var allArguments = mcExp.Arguments;
int argsIndex = 0;
Expression firstArgs;
bool isLambdaQueryJoinExt = false;
if (mcExp.Method.IsStatic) //区分静态方法还是实例方法
{
firstArgs = allArguments[0]; //like b.Name.IsNull("22")
argsIndex = 1;
if (firstArgs.Type.Name.Contains("LambdaQueryJoin"))
{
isLambdaQueryJoinExt = true;
}
}
else
{
firstArgs = mcExp.Object;//like b.Id.ToString()
}
#region 缓存处理 效率并不高
//MethodCallExpressionCacheItem methodCache;
//string key = "";
//if (SettingConfig.UseLambdaCache&& false)
//{
// key = __PrefixsAllKey + mcExp + nodeType;
// var exists = MethodCallExpressionCache.TryGetValue(key, out methodCache);
// if (exists)
// {
// if (!methodCache.isConstantMethod)
// {
// var methodCall = methodCache.CRLExpression.Data as CRLExpression.MethodCallObj;
// if (methodCall.Args.Count > 0)
// {
// for (int i = argsIndex; i < allArguments.Count; i++)
// {
// bool isConstant1;
// var obj = GetParameExpressionValue(allArguments[i], out isConstant1);
// arguments.Add(obj);
// }
// methodCall.Args = arguments;
// }
// }
// methodCache.CRLExpression.SqlOut = "";
// return methodCache.CRLExpression;
// }
//}
#endregion
#region MethodCallExpression
//bool isConstantMethod = false;
MemberExpression memberExpression;
string methodField = "";
string memberName = "";
string methodName = mcExp.Method.Name;
if (firstArgs is ParameterExpression || isLambdaQueryJoinExt)
{
var exp2 = mcExp.Arguments[1] as UnaryExpression;
var type = exp2.Operand.GetType();
var p = type.GetProperty("Body");
var exp3 = p.GetValue(exp2.Operand, null) as Expression;
methodField = RouteExpressionHandler(exp3).SqlOut;
memberName = "";
}
else if (firstArgs is UnaryExpression)//like a.Code.Count()
{
memberExpression = (firstArgs as UnaryExpression).Operand as MemberExpression;
memberName = memberExpression.Member.Name;
var field = TypeCache.GetProperties(memberExpression.Expression.Type, true)[memberName];
memberName = __DBAdapter.FieldNameFormat(field);
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
}
else if (firstArgs is BinaryExpression)
{
var be = firstArgs as BinaryExpression;
methodField = BinaryExpressionHandler(be.Left, be.Right, be.NodeType).Data.ToString();
}
else if (firstArgs is MemberExpression)
{
//like a.Code
memberExpression = firstArgs as MemberExpression;
memberName = memberExpression.Member.Name;
var type = memberExpression.Expression.Type;
if (type.IsSubclassOf(typeof(IModel)))
{
var field = TypeCache.GetProperties(type, true)[memberExpression.Member.Name];
memberName = __DBAdapter.FieldNameFormat(field);
}
if (memberExpression.Expression.NodeType == ExpressionType.Parameter)
{
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
//var allConstant = true;
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj);
}
}
else
{
//like Convert.ToDateTime(times)
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj2 = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj2);
}
}
}
else if (firstArgs is ConstantExpression)//按常量
{
//like DateTime.Parse("2016-02-11 12:56"),
//isConstantMethod = true;
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
}
//else
//{
// throw new CRLException("不支持此语法解析:" + args);
//}
if (nodeType == null)
{
nodeType = ExpressionType.Equal;
}
if (string.IsNullOrEmpty(methodField))
{
//当是常量转换方法
var method = mcExp.Method;
object obj;
if (mcExp.Method.IsStatic)//like DateTime.Parse("2016-02-11")
{
obj = method.Invoke(null, arguments.ToArray());
}
else//like time.AddDays(1)
{
if (arguments.Count == 0)
{
throw new Exception("未能解析" + exp);
}
var args1 = arguments.First();
arguments.RemoveAt(0);
obj = method.Invoke(args1, arguments.ToArray());
}
var exp2 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj
};
//var cache = new MethodCallExpressionCacheItem() { CRLExpression = exp2, argsIndex = argsIndex, isConstantMethod = isConstantMethod, isStatic = mcExp.Method.IsStatic };
//MethodCallExpressionCache[key] = cache;
return(exp2);
}
var methodInfo = new CRLExpression.MethodCallObj()
{
Args = arguments, ExpressionType = nodeType.Value, MemberName = memberName, MethodName = methodName, MemberQueryName = methodField
};
methodInfo.ReturnType = mcExp.Type;
#endregion
var exp4 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.MethodCall, Data = methodInfo
};
//if (SettingConfig.UseLambdaCache && false)
//{
// var cache2 = new MethodCallExpressionCacheItem() { CRLExpression = exp4, argsIndex = argsIndex, isConstantMethod = isConstantMethod };
// MethodCallExpressionCache[key] = cache2;
//}
return(exp4);
#endregion
}
public string ToUpper(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
return(dBAdapter.ToUpperFormat(field));
}
public string CaseToType(CRLExpression.MethodCallObj methodInfo, ref int parIndex, AddParameHandler addParame)
{
var field = methodInfo.MemberQueryName;
return(dBAdapter.CastField(field, methodInfo.ReturnType));
}
