我上端传了一个变量:
int smid = 15;
ServersModel sgm = sqlHelper.Query<ServersModel>(s => s.id == smid);
后端二次表达式 base.Visit(node.Right);会跳转到VisitMember方法(MemberExpression只能获取成员的名称)怎么获取这个变量的值:
protected override Expression VisitBinary(BinaryExpression node)
{
if (node == null)
{
throw new ArgumentNullException("BinartExpression");
}
//this._stack.Push(")");
base.Visit(node.Right);
this._stack.Push(" " + node.NodeType.ToSqlOperator() + " ");
base.Visit(node.Left);
//this._stack.Push("(");
return node;
}
protected override Expression VisitMember(MemberExpression node)
{
if (node == null)
{
throw new ArgumentNullException("MemberExpression");
}
this._stack.Push(" " + node.Member.Name + " ");
return node;
}
最后的sql语句拼接成这样:select * from servers where id =sid
我想要这样的:select * from servers where id = 15