本文整理汇总了C#中System.Runtime.InteropServices.DllImportAttribute.PreserveSig字段的典型用法代码示例。如果您正苦于以下问题：C# DllImportAttribute.PreserveSig字段的具体用法？C# DllImportAttribute.PreserveSig怎么用？C# DllImportAttribute.PreserveSig使用的例子？那么, 这里精选的字段代码示例或许可以为您提供帮助。您也可以进一步了解该字段所在类System.Runtime.InteropServices.DllImportAttribute的用法示例。
在下文中一共展示了DllImportAttribute.PreserveSig字段的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: SHAutoComplete
//引入命名空间
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
internal class Win32
{
// The SHAutoComplete function allows you
// to add auto-compete functionality to your
// Windows Forms text boxes. In .NET Framework
// 1.1 and earlier, you can use SHAutoComplete.
// Later versions have this ability built in without
// requiring platform invoke.
// See the MSDN documentation of the
// SHAutoComplete function for the
// complete set of flags.
public enum SHAutoCompleteFlags
{
SHACF_DEFAULT = 0x00000000,
SHACF_FILESYSTEM = 0x00000001
}
// Use the DllImportAttribute to import the SHAutoComplete function.
// Set the PreserveSig to false to specify exception errors.
[DllImportAttribute("shlwapi.dll", EntryPoint = "SHAutoComplete", ExactSpelling = true, PreserveSig = false)]
public static extern void SHAutoComplete(IntPtr hwndEdit, SHAutoCompleteFlags dwFlags);
// Use the DllImportAttribute to import the SHAutoComplete function.
// Use the default value of the PreserveSig field to specify HRESULT errors.
[DllImportAttribute("shlwapi.dll", EntryPoint = "SHAutoComplete", ExactSpelling = true)]
public static extern int SHAutoCompleteHRESULT(IntPtr hwndEdit, SHAutoCompleteFlags dwFlags);
}
static class Program
{
static void Main()
{
Run();
}
static void Run()
{
// Create a null (nothing in Visual Basic) IntPtr
// to pass to the SHAutoComplete method. Doing so
// creates a failure and demonstrates the two ways
// that the PreserveSig property allows you to handle
// failures.
// Normally, you would pass a handle to a managed
// Windows Forms text box.
IntPtr iPtr = new IntPtr(0);
// Call the SHAutoComplete function using exceptions.
try
{
Console.WriteLine("Calling the SHAutoComplete method with the PreserveSig field set to false.");
Win32.SHAutoComplete(iPtr, Win32.SHAutoCompleteFlags.SHACF_DEFAULT);
}
catch (Exception e)
{
Console.WriteLine("Exception handled: " + e.Message);
}
Console.WriteLine("Calling the SHAutoComplete method with the PreserveSig field set to true.");
// Call the SHAutoComplete function using HRESULTS.
int HRESULT = Win32.SHAutoCompleteHRESULT(iPtr, Win32.SHAutoCompleteFlags.SHACF_DEFAULT);
Console.WriteLine("HRESULT handled: " + HRESULT.ToString());
}
}