.NET REFLECTION 中 FieldInfo 类的使用问题

Question

<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

Dim resources As   
System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(_Class))
    Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand
    Me.SqlInsertCommand1 = New System.Data.SqlClient.SqlCommand
    Me.SqlUpdateCommand1 = New System.Data.SqlClient.SqlCommand
    Me.SqlDeleteCommand1 = New System.Data.SqlClient.SqlCommand
    Me.SqlDataAdapter1 = New System.Data.SqlClient.SqlDataAdapter
    Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection

.....
.....



Me.SqlInsertCommand1.CommandText = resources.GetString("SqlInsertCommand1.CommandText")
    Me.SqlInsertCommand1.Connection = Me.SqlConnection1
    Me.SqlInsertCommand1.Parameters.AddRange(New System.Data.SqlClient.SqlParameter() {New System.Data.SqlClient.SqlParameter("@MAIN_FACILITY_USED", System.Data.SqlDbType.NVarChar, 0, "MAIN FACILITY USED")

为什么下面的行我无法访问有关 sqlinsertcommand 的参数集合，但我可以通过以下代码访问 sqlinsertcommand 及其命令文本本身：

Dim flags As BindingFlags = BindingFlags.NonPublic Or BindingFlags.Instance Or BindingFlags.NonPublic
 For Each info As FieldInfo In AssemblyInstance.GetType().GetFields(flags)
  If info.FieldType.FullName = "System.Data.SqlClient.SqlCommand" Then
    cmd = CType(info.GetValue(AssemblyInstance), SqlCommand)
   End If
Next

How can Ireach that sqlparameter collection via fieldinfo or other related classes in >NET Reflection ？ 看起来很粗鲁，但任何帮助甚至建议对我来说都很重要。

Answer 1

所以“cmd”是“System.Data.SqlClient.SqlCommand”的实例？！ - 是的，应该的。
然后它有一个属性“Parameters”来保存您的参数。