如何在IF ELSE之外获取变量值

在方法之外拉变量声明:

string[] filePaths;

if (chkIncludeSubFolders.Checked)
{
    filePaths = Directory.GetFiles(txtPath.Text, txtFormat.Text, SearchOption.AllDirectories);
}
else
{
    filePaths = Directory.GetFiles(txtPath.Text, txtFormat.Text, SearchOption.TopDirectoryOnly);
}

// You can use filePaths here

你可以按照其他答案的建议,filePaths在if/else之外声明.但是,你重复自己,因为两个调用之间唯一不同的是选项.所以先设置它们然后拨打电话:

var searchOptions = chkIncludeSubFolders.Checked 
    ? SearchOption.AllDirectories 
    : SearchOption.TopDirectoryOnly; 

string[] filePaths = Directory.GetFiles(txtPath.Text, txtFormat.Text, searchOptions);

foreach (string item in filePaths) 
{
    //my code
}