public Expression2SqlCore <T> Select <T2, T3, T4, T5, T6, T7, T8, T9, T10>(Expression <Func <T, T2, T3, T4, T5, T6, T7, T8, T9, T10, object> > expression = null)
{
PropertyInfoCache.InitCacheInfo <T2>();
PropertyInfoCache.InitCacheInfo <T3>();
PropertyInfoCache.InitCacheInfo <T4>();
PropertyInfoCache.InitCacheInfo <T5>();
PropertyInfoCache.InitCacheInfo <T6>();
PropertyInfoCache.InitCacheInfo <T7>();
PropertyInfoCache.InitCacheInfo <T8>();
PropertyInfoCache.InitCacheInfo <T9>();
PropertyInfoCache.InitCacheInfo <T10>();
string sql = SelectParser(typeof(T), typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8), typeof(T9), typeof(T10));
if (expression == null)
{
this._sqlPack.Sql.AppendFormat(sql, "*");
}
else
{
Expression2SqlProvider.Select(expression.Body, this._sqlPack);
this._sqlPack.Sql.AppendFormat(sql, this._sqlPack.SelectFieldsStr);
}
return(this);
}
private Expression2SqlCore <T> JoinParser2 <T2, T3>(Expression <Func <T2, T3, bool> > expression, string leftOrRightJoin = "")
{
PropertyInfoCache.InitCacheInfo <T2>();
PropertyInfoCache.InitCacheInfo <T3>();
string joinTableName = PropertyInfoCache.GetTableName(typeof(T3).FullName);// typeof(T3).Name;
this._sqlPack.SetTableAlias(joinTableName);
this._sqlPack.Sql.AppendFormat("\n{0}join {1} on", leftOrRightJoin, joinTableName + " " + this._sqlPack.GetTableAlias(joinTableName));
Expression2SqlProvider.Join(expression.Body, this._sqlPack);
return(this);
}
protected override SqlPack Select(MemberExpression expression, SqlPack sqlPack)
{
sqlPack.SetTableAlias(PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
string tableAlias = sqlPack.GetTableAlias(PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
sqlPack.SelectFields.Add(tableAlias + PropertyInfoCache.GetFieldName(expression.Member.DeclaringType.FullName, expression.Member.Name));
return(sqlPack);
}
private string SelectParser(params Type[] ary)
{
this._sqlPack.Clear();
this._sqlPack.IsSingleTable = false;
foreach (var item in ary)
{
string tableName = PropertyInfoCache.GetTableName(item.FullName); // item.Name;
this._sqlPack.SetTableAlias(tableName);
}
return("select {0}\nfrom " + ModelCache <T> ._TableName + " " + this._sqlPack.GetTableAlias(ModelCache <T> ._TableName));
}
public Expression2SqlCore <T> Select <T2>(Expression <Func <T, T2, object> > expression = null)
{
PropertyInfoCache.InitCacheInfo <T2>();
string sql = SelectParser(typeof(T), typeof(T2));
if (expression == null)
{
this._sqlPack.Sql.AppendFormat(sql, "*");
}
else
{
Expression2SqlProvider.Select(expression.Body, this._sqlPack);
this._sqlPack.Sql.AppendFormat(sql, this._sqlPack.SelectFieldsStr);
}
return(this);
}
public Expression2SqlCore <T> Select(Expression <Func <T, object> > expression = null)
{
string sql = SelectParser(typeof(T));
if (expression == null)
{
//this._sqlPack.Sql.AppendFormat(sql, "*");
var fields = PropertyInfoCache.FieldNameAsPropertyName(typeof(T).FullName);
this._sqlPack.Sql.AppendFormat(sql, fields);
}
else
{
Expression2SqlProvider.Select(expression.Body, this._sqlPack);
this._sqlPack.Sql.AppendFormat(sql, this._sqlPack.SelectFieldsStr);
}
return(this);
}
protected override SqlPack Where(MemberExpression expression, SqlPack sqlPack)
{
// DateTime dateTime = new DateTime(2012, 1, 1);
// Where(u => u.TransDate > dateTime)
if (expression.Expression != null && expression.Expression.NodeType is ExpressionType.Constant && expression.Member.MemberType == MemberTypes.Field)
{
var paramValue = ((ConstantExpression)expression.Expression).Value;
var param = paramValue.GetType().GetField(expression.Member.Name).GetValue(paramValue);
sqlPack.AddDbParameter(param);
return(sqlPack);
}
// Bill bill = new Bill();
// bill.TransDate = dateTime;
// Where(u => u.TransDate > bill.TransDate)
if (expression.Expression != null && expression.Expression.NodeType is ExpressionType.MemberAccess && expression.Member.MemberType == MemberTypes.Property)
{
var objExpression = (MemberExpression)expression.Expression;
var objValue = ((ConstantExpression)objExpression.Expression).Value;
// bill
var obj = objValue.GetType().GetField(objExpression.Member.Name).GetValue(objValue);
// bill.TransDate
var param = obj.GetType().GetProperty(expression.Member.Name).GetValue(obj);
sqlPack.AddDbParameter(param);
return(sqlPack);
}
sqlPack.SetTableAlias(PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
string tableAlias = sqlPack.GetTableAlias(PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
sqlPack += " " + tableAlias + PropertyInfoCache.GetFieldName(expression.Member.DeclaringType.FullName, expression.Member.Name);
return(sqlPack);
}
protected override SqlPack Sum(MemberExpression expression, SqlPack sqlPack)
{
sqlPack.Sql.AppendFormat("select sum({0}) from {1}", PropertyInfoCache.GetFieldName(expression.Member.DeclaringType.FullName, expression.Member.Name), PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
return(sqlPack);
}
protected override SqlPack OrderBy(MemberExpression expression, SqlPack sqlPack)
{
sqlPack.SetTableAlias(PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
sqlPack += sqlPack.GetTableAlias(PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName)) + "." + PropertyInfoCache.GetFieldName(expression.Member.DeclaringType.FullName, expression.Member.Name);
return(sqlPack);
}
static Expression2SqlCore()
{
PropertyInfoCache.InitCacheInfo <T>();
}
public Expression2SqlCore <T> FullJoin <T2, T3>(Expression <Func <T2, T3, bool> > expression)
{
PropertyInfoCache.InitCacheInfo <T2>();
PropertyInfoCache.InitCacheInfo <T3>();
return(JoinParser2(expression, "full "));
}
public Expression2SqlCore <T> RightJoin <T2>(Expression <Func <T, T2, bool> > expression)
{
PropertyInfoCache.InitCacheInfo <T2>();
return(JoinParser(expression, "right "));
}
protected override SqlPack Count(MemberExpression expression, SqlPack sqlPack)
{
sqlPack.Sql.AppendFormat("SELECT COUNT({0}) FROM {1}", PropertyInfoCache.GetFieldName(expression.Member.DeclaringType.FullName, expression.Member.Name), PropertyInfoCache.GetTableName(expression.Member.DeclaringType.FullName));
return(sqlPack);
}
