GetMethod返回空

Question

好吧，我有一节课：

public class tUObject
{
    public const string strSelect = "SELECT Id, cName, Major FROM tUObject WHERE Id = ";

    //constructors and stuff...

    public virtual void FillElem(ref List<tUObject> l, DataSet ds)
    {
        //...
    }
}

在MainWindow()中，我想使用GetMethod()实现FillElem()

static List<tUObject> obj = new List<tUObject>();
static DataSet objDataSet = new DataSet();
//...
string strClass = objDataSet.Tables[0].Rows[0]["Class"].ToString(); //"tUObject"
Type t = Type.GetType("UniDB_WPF." + strClass);  //tUObject with the assembly name
Type tlist = obj.GetType();                      //list<tUObject>
Type tset = objDataSet.GetType();                //DataSet

//Getting strSelect from tUObject
string strAccessSelect = t.GetField("strSelect").GetRawConstantValue().ToString() + ((int)item.Tag).ToString();
//...
//Getting FillElem from tUObject
MethodInfo mi = t.GetMethod("FillElem", BindingFlags.Public, null, new[] { tlist, tset }, null);

问题是，GetMethod()返回null，而GetField()工作得很好。tlist和tset不是null，分别返回"List'1“和"DataSet”。那为什么会发生这种事？

Answer 1

试试这个：

//Getting FillElem from tUObject
MethodInfo mi = t.GetMethod("FillElem", BindingFlags.Public | BindingFlags.Instance, null, new[] { tlist.MakeByRefType(), tset }, null);

Answer 2

回忆器的答案应该有效。以下代码返回正确的数据：

public class Test
{
    public virtual void Test1(ref List<object> t1, object t2)
    {

    }
}

和方法请求

var t = new Test();
var mi = t.GetType().GetMethod("Test1", BindingFlags.Instance | BindingFlags.Public, null, new Type[] { typeof(List<object>).MakeByRefType(), typeof(object) }, null);

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所以你需要寻找另一个问题。您确定您传递的类型是正确的吗？