GetMethod（）返回null

Question

我在

public class gridQueries 
{ 
    .... 

    public string propertiesCombinedNamesQuery { get; set; } = 
     "SELECT [NameId], [CombinedName] AS Display FROM [Names] ORDER BY [CombinedName]"; 
    .... 
} // end class gridQueries 

一类查询的另一种方法，我得到这个查询的名称的字符串，然后尝试调用它，但GetMethod()总是返回null。

// Get the short name of the dependent field from the dictionary value[2] string 
string _1DF_Name = addEditFieldControl.FirstOrDefault(p => p.Value[1].Contains(fieldShortName)).Key; 
// Find the long name of the dependent field 
string Value1Text = addEditFieldControl.FirstOrDefault(p => p.Key.Contains(_1DF_Name)).Value[1]; 

这给了我一个字符串，它看起来像这样 “_Q_propertiesCombinedNamesQuery_OwnerName”

// Couldn't get invoke to work. 
// because MethodInfo info is null after the GetMethod() call 

string queryMethod = ""; 
queryMethod = "queries."+strIsBtwTags(Value1Text, "_Q_", "_"); 
Type queriesType = queryMethod.GetType(); 
MethodInfo info = queriesType.GetMethod(queryMethod); 

string query = info.Invoke(null, null).ToString(); 

任何人能发现我究竟做错了什么？ 或建议一种方法来调用这个字符串作为一种方法，以便我得到返回字符串与SQL查询在里面？

任何和所有的帮助，非常感谢。

Answer 1

我转换我的财产语句转换的方法声明（谢谢李四上述评论）

来源：

public class gridQueries 
{ 
    .... 
    public string propertiesCombinedNamesQuery { get; set; } = 
     "SELECT [NameId], [CombinedName] AS Display FROM [Names] ORDER BY [CombinedName]"; 
    .... 
} 

要：

public class gridQueries 
{ 
    .... 
    public string propertiesCombinedNamesQuery() 
    { 
     return "SELECT [NameId], [CombinedName] AS Display FROM [Names] ORDER BY [CombinedName]"; 
    } 
    .... 
} 

从我的节目，我调用方法

// Top of program 
using System.Reflection; 
.... 
.... 
string qstring = "propertiesCombinedNamesQuery"; 
string query = "" 

gridQueries q2 = new gridQueries(); 
MethodInfo methodInfo = q2.GetType().GetMethod(qstring); 
query = (string)methodInfo.Invoke(q2, null); 
.... 

查询现在包含“SELECT [NameId]，[CombinedName] AS显示FROM [Names] ORDER BY [CombinedName]”

这是有效的。

我所缺少的是传递类名作为Invoke语句的第一个参数。