Type.GetHashCode 方法
返回此实例的哈希代码。
**命名空间:**System
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
Public Overrides Function GetHashCode As Integer
用法
Dim instance As Type
Dim returnValue As Integer
returnValue = instance.GetHashCode
public override int GetHashCode ()
public:
virtual int GetHashCode () override
public int GetHashCode ()
public override function GetHashCode () : int
返回值
包含此实例的哈希代码的 Int32。
备注
此方法重写 Object.GetHashCode。
示例
下面的示例显示 System.Windows.Forms.Button 类的哈希代码。
Imports System
Imports System.Security
Imports System.Reflection
Imports Microsoft.VisualBasic
' Compile this sample using the following command line:
' vbc type_gethashcode_getfields.vb /r:"System.Windows.Forms.dll" /r:"System.dll"
Class FieldsSample
Public Shared Sub Main()
Dim myType As Type = GetType(System.Net.IPAddress)
Dim myFields As FieldInfo() = myType.GetFields((BindingFlags.Static Or BindingFlags.NonPublic))
Console.WriteLine(ControlChars.Lf & "The IPAddress class has the following nonpublic fields: ")
Dim myField As FieldInfo
For Each myField In myFields
Console.WriteLine(myField.ToString())
Next myField
Dim myType1 As Type = GetType(System.Net.IPAddress)
Dim myFields1 As FieldInfo() = myType1.GetFields()
Console.WriteLine(ControlChars.Lf & "The IPAddress class has the following public fields: ")
Dim myField1 As FieldInfo
For Each myField1 In myFields1
Console.WriteLine(myField.ToString())
Next myField1
Try
Console.WriteLine("The HashCode of the System.Windows.Forms.Button type is: {0}", GetType(System.Windows.Forms.Button).GetHashCode())
Catch e As SecurityException
Console.WriteLine("An exception occurred.")
Console.WriteLine(("Message: " & e.Message))
Catch e As Exception
Console.WriteLine("An exception occurred.")
Console.WriteLine(("Message: " & e.Message))
End Try
End Sub 'Main
End Class 'FieldsSample
using System;
using System.Security;
using System.Reflection;
class FieldsSample
{
public static void Main()
{
Type myType = typeof(System.Net.IPAddress);
FieldInfo [] myFields = myType.GetFields(BindingFlags.Static | BindingFlags.NonPublic);
Console.WriteLine ("\nThe IPAddress class has the following nonpublic fields: ");
foreach (FieldInfo myField in myFields)
{
Console.WriteLine(myField.ToString());
}
Type myType1 = typeof(System.Net.IPAddress);
FieldInfo [] myFields1 = myType1.GetFields();
Console.WriteLine ("\nThe IPAddress class has the following public fields: ");
foreach (FieldInfo myField in myFields1)
{
Console.WriteLine(myField.ToString());
}
try
{
Console.WriteLine("The HashCode of the System.Windows.Forms.Button type is: {0}",
typeof(System.Windows.Forms.Button).GetHashCode());
}
catch(SecurityException e)
{
Console.WriteLine("An exception occurred.");
Console.WriteLine("Message: "+e.Message);
}
catch(Exception e)
{
Console.WriteLine("An exception occurred.");
Console.WriteLine("Message: "+e.Message);
}
}
}
#using <system.dll>
#using <system.windows.forms.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::Security;
using namespace System::Reflection;
int main()
{
Type^ myType = System::Net::IPAddress::typeid;
array<FieldInfo^>^myFields = myType->GetFields( static_cast<BindingFlags>(BindingFlags::Static | BindingFlags::NonPublic) );
Console::WriteLine( "\nThe IPAddress class has the following nonpublic fields: " );
System::Collections::IEnumerator^ myEnum = myFields->GetEnumerator();
while ( myEnum->MoveNext() )
{
FieldInfo^ myField = safe_cast<FieldInfo^>(myEnum->Current);
Console::WriteLine( myField );
}
Type^ myType1 = System::Net::IPAddress::typeid;
array<FieldInfo^>^myFields1 = myType1->GetFields();
Console::WriteLine( "\nThe IPAddress class has the following public fields: " );
System::Collections::IEnumerator^ myEnum2 = myFields1->GetEnumerator();
while ( myEnum2->MoveNext() )
{
FieldInfo^ myField = safe_cast<FieldInfo^>(myEnum2->Current);
Console::WriteLine( myField );
}
try
{
Console::WriteLine( "The HashCode of the System::Windows::Forms::Button type is: {0}", System::Windows::Forms::Button::typeid->GetHashCode() );
}
catch ( SecurityException^ e )
{
Console::WriteLine( "An exception occurred." );
Console::WriteLine( "Message: {0}", e->Message );
}
catch ( Exception^ e )
{
Console::WriteLine( "An exception occurred." );
Console::WriteLine( "Message: {0}", e->Message );
}
}
import System.*;
import System.Security.*;
import System.Reflection.*;
class FieldsSample
{
public static void main(String[] args)
{
Type myType = System.Net.IPAddress.class.ToType();
FieldInfo myFields[] = myType.GetFields(BindingFlags.Static
| BindingFlags.NonPublic);
Console.WriteLine("\nThe IPAddress class has the following nonpublic"
+ " fields: ");
for (int iCtr = 0; iCtr < myFields.length; iCtr++) {
FieldInfo myField = myFields[iCtr];
Console.WriteLine(myField.ToString());
}
Type myType1 = System.Net.IPAddress.class.ToType();
FieldInfo myFields1[] = myType1.GetFields();
Console.WriteLine("\nThe IPAddress class has the following"
+ " public fields: ");
for (int iCtr = 0; iCtr < myFields1.length; iCtr++) {
FieldInfo myField = myFields1[iCtr];
Console.WriteLine(myField.ToString());
}
try {
Console.WriteLine("The HashCode of the System.Windows.Forms.Button"
+ " type is: {0}",
(Int32)(System.Windows.Forms.Button.class.ToType().
GetHashCode()));
}
catch (SecurityException e) {
Console.WriteLine("An exception occurred.");
Console.WriteLine("Message: " + e.get_Message());
}
catch (System.Exception e) {
Console.WriteLine("An exception occurred.");
Console.WriteLine("Message: " + e.get_Message());
}
} //main
} //FieldsSample
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0、1.0