我正在尝试向我的项目添加一个选择文件对话框，现在只能输入用户输入的文件名。
我做了一些搜索，似乎带有GetOpenFileName函数的windows API对我来说是最简单的方法。但是，当我从MSDN或其他网站复制并粘贴示例代码时，我遇到了一些构建错误。
我正在使用Visual Studio 2017.我使用的示例代码来自http://www.cplusplus.com/forum/windows/169960/：
#include <iostream>
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
int main()
{
char filename[ MAX_PATH ];
OPENFILENAME ofn;
ZeroMemory( &filename, sizeof( filename ) );
ZeroMemory( &ofn, sizeof( ofn ) );
ofn.lStructSize = sizeof( ofn );
ofn.hwndOwner = NULL; // If you have a window to center over, put its HANDLE here
ofn.lpstrFilter = "Text Files\0*.txt\0Any File\0*.*\0";
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrTitle = "Select a File, yo!";
ofn.Flags = OFN_DONTADDTORECENT | OFN_FILEMUSTEXIST;
if (GetOpenFileNameA( &ofn ))
{
std::cout << "You chose the file \"" << filename << "\"\n";
}
else
{
// All this stuff below is to tell you exactly how you messed up above.
// Once you've got that fixed, you can often (not always!) reduce it to a 'user cancelled' assumption.
switch (CommDlgExtendedError())
{
case CDERR_DIALOGFAILURE : std::cout << "CDERR_DIALOGFAILURE\n"; break;
case CDERR_FINDRESFAILURE : std::cout << "CDERR_FINDRESFAILURE\n"; break;
case CDERR_INITIALIZATION : std::cout << "CDERR_INITIALIZATION\n"; break;
case CDERR_LOADRESFAILURE : std::cout << "CDERR_LOADRESFAILURE\n"; break;
case CDERR_LOADSTRFAILURE : std::cout << "CDERR_LOADSTRFAILURE\n"; break;
case CDERR_LOCKRESFAILURE : std::cout << "CDERR_LOCKRESFAILURE\n"; break;
case CDERR_MEMALLOCFAILURE : std::cout << "CDERR_MEMALLOCFAILURE\n"; break;
case CDERR_MEMLOCKFAILURE : std::cout << "CDERR_MEMLOCKFAILURE\n"; break;
case CDERR_NOHINSTANCE : std::cout << "CDERR_NOHINSTANCE\n"; break;
case CDERR_NOHOOK : std::cout << "CDERR_NOHOOK\n"; break;
case CDERR_NOTEMPLATE : std::cout << "CDERR_NOTEMPLATE\n"; break;
case CDERR_STRUCTSIZE : std::cout << "CDERR_STRUCTSIZE\n"; break;
case FNERR_BUFFERTOOSMALL : std::cout << "FNERR_BUFFERTOOSMALL\n"; break;
case FNERR_INVALIDFILENAME : std::cout << "FNERR_INVALIDFILENAME\n"; break;
case FNERR_SUBCLASSFAILURE : std::cout << "FNERR_SUBCLASSFAILURE\n"; break;
default : std::cout << "You cancelled.\n";
}
}
}
当我复制并粘贴到vs时，它会显示以下内容：
Severity Code Description Project File Line Suppression State
Error C2440 '=': cannot convert from 'char [260]' to 'LPWSTR' ConsoleApplication1 c:\users\xfan0\documents\visual studio 2017\projects\consoleapplication1\consoleapplication1\consoleapplication1.cpp 18
Severity Code Description Project File Line Suppression State
Error C2440 '=': cannot convert from 'const char [19]' to 'LPCWSTR' ConsoleApplication1 c:\users\xfan0\documents\visual studio 2017\projects\consoleapplication1\consoleapplication1\consoleapplication1.cpp 20
Severity Code Description Project File Line Suppression State
Error C2664 'BOOL GetOpenFileNameA(LPOPENFILENAMEA)': cannot convert argument 1 from 'OPENFILENAME *' to 'LPOPENFILENAMEA' ConsoleApplication1 c:\users\xfan0\documents\visual studio 2017\projects\consoleapplication1\consoleapplication1\consoleapplication1.cpp 23
Severity Code Description Project File Line Suppression State
Error (active) E0167 argument of type "OPENFILENAME *" is incompatible with parameter of type "LPOPENFILENAMEA" ConsoleApplication1 c:\Users\XFAN0\Documents\Visual Studio 2017\Projects\ConsoleApplication1\ConsoleApplication1\ConsoleApplication1.cpp 23
试图搜索但没找到我的运气:(
答案 0 :(得分：1)
Microsoft通常提倡的方法是使用他们的“通用文本”宏，因此您的字符串文字将如下所示：
package demo;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.interactions.Actions;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
public class TestAnyURL_TestNG
{
WebDriver driver;
@BeforeTest
public void setup ()
{
System.setProperty("webdriver.chrome.driver", "C:\\Utility\\BrowserDrivers\\chromedriver.exe");
ChromeOptions options = new ChromeOptions();
options.addArguments("test-type");
options.addArguments("start-maximized");
options.addArguments("--js-flags=--expose-gc");
options.addArguments("--enable-precise-memory-info");
options.addArguments("--disable-popup-blocking");
options.addArguments("--disable-default-apps");
options.addArguments("test-type=browser");
options.addArguments("disable-infobars");
driver = new ChromeDriver(options);
driver.manage().deleteAllCookies();
}
@Test(priority = 0)
public void Validlogin_IO () throws InterruptedException
{
driver.navigate().to("http://google.com"); //ForSe test environment URL
driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
driver.findElement(By.xpath("//*[@id='email_address']")).sendKeys("tengku.forse@gmail.com"); //this is official email
driver.findElement(By.xpath("//*[@id='password']")).sendKeys("Pass12345"); //this is password
driver.findElement(By.xpath("//*[@id='login-form']/div[4]/button")).click(); //click on submit button to login
System.out.println("Login button pressed"); } //This code is to add new case
@Test (priority = 1)
public void AddCase() throws InterruptedException
{
WebElement element = driver.findElement(By.partialLinkText("Add Case")); //To find 'Add Case' button on dashboard
Actions action = new Actions (driver); action.moveToElement(element); //Move mouse and hover to 'Add Case' button
action.click().build().perform(); //Click on 'Add Case' button
driver.findElement(By.id("name")).sendKeys("Perak Murder Case -53311");//Provide Case Name
driver.findElement(By.id("fileupload")).sendKeys("C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSIImages\\FisheyeImages\\IMG_1187.JPG"+"\n"+"C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSIImages\\FisheyeImages\\IMG_1188.JPG"+"\n"+"C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSIImages\\FisheyeImages\\IMG_1189.JPG"+"\n"+"C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSIImages\\Fisheye Images\\IMG_1190.JPG"); //Upload files
driver.findElement(By.id("fileupload1")).sendKeys("C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSIImages\\EvidenceImages\\_DSC0970.JPG"+"\n"+"C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSI>Images\\EvidenceImages\\_DSC0971.JPG"+"\n"+"C:\\Users\\sanchit.IGENEDC\\Desktop\\iCSIImages\\Evidence Images\\_DSC0972.JPG");
Thread.sleep(6000); //wait for files to load
driver.findElement(By.id("btnSubmit")).click();//click on submit button
}
}
这样，您可以构建窄字符或宽字符串（后者通过定义ofn.lpstrFilter = _T("Text Files\0*.txt\0Any File\0*.*\0");
ofn.lpstrTitle = _T("Select a File, yo!");
和UNICODE）。对于窄字符构建，_UNICODE将映射为空，对于宽字符构建，_T将映射为L，因此您可以自动为正在构建的方式获取正确的字符串。< / p>
要使用此功能，请添加<tchar.h>。
例如：
#include <iostream>
#include <tchar.h>
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
int main()
{
char filename[ MAX_PATH ];
OPENFILENAME ofn;
ZeroMemory( &filename, sizeof( filename ) );
ZeroMemory( &ofn, sizeof( ofn ) );
ofn.lStructSize = sizeof( ofn );
ofn.hwndOwner = NULL; // If you have a window to center over, put its HANDLE here
ofn.lpstrFilter = _T("Text Files\0*.txt\0Any File\0*.*\0");
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrTitle = _T("Select a File, yo!");
ofn.Flags = OFN_DONTADDTORECENT | OFN_FILEMUSTEXIST;
if (GetOpenFileName( &ofn ))
{
std::cout << "You chose the file \"" << filename << "\"\n";
}
else
{
// All this stuff below is to tell you exactly how you messed up above.
// Once you've got that fixed, you can often (not always!) reduce it to a 'user cancelled' assumption.
switch (CommDlgExtendedError())
{
case CDERR_DIALOGFAILURE : std::cout << "CDERR_DIALOGFAILURE\n"; break;
case CDERR_FINDRESFAILURE : std::cout << "CDERR_FINDRESFAILURE\n"; break;
case CDERR_INITIALIZATION : std::cout << "CDERR_INITIALIZATION\n"; break;
case CDERR_LOADRESFAILURE : std::cout << "CDERR_LOADRESFAILURE\n"; break;
case CDERR_LOADSTRFAILURE : std::cout << "CDERR_LOADSTRFAILURE\n"; break;
case CDERR_LOCKRESFAILURE : std::cout << "CDERR_LOCKRESFAILURE\n"; break;
case CDERR_MEMALLOCFAILURE : std::cout << "CDERR_MEMALLOCFAILURE\n"; break;
case CDERR_MEMLOCKFAILURE : std::cout << "CDERR_MEMLOCKFAILURE\n"; break;
case CDERR_NOHINSTANCE : std::cout << "CDERR_NOHINSTANCE\n"; break;
case CDERR_NOHOOK : std::cout << "CDERR_NOHOOK\n"; break;
case CDERR_NOTEMPLATE : std::cout << "CDERR_NOTEMPLATE\n"; break;
case CDERR_STRUCTSIZE : std::cout << "CDERR_STRUCTSIZE\n"; break;
case FNERR_BUFFERTOOSMALL : std::cout << "FNERR_BUFFERTOOSMALL\n"; break;
case FNERR_INVALIDFILENAME : std::cout << "FNERR_INVALIDFILENAME\n"; break;
case FNERR_SUBCLASSFAILURE : std::cout << "FNERR_SUBCLASSFAILURE\n"; break;
default : std::cout << "You cancelled.\n";
}
}
}
要获取“保存”文件名，只需将GetOpenFilename更改为GetSaveFilename即可。虽然你可能会在OPENFILENAME中传递的标志有一些差异 - 例如，当你打开一个文件时传递OFN_FILEMUSTEXIST是很常见的，但是你几乎不想要这样做。重新保存文件。