我正在用 C# 构建一个 Winforms 应用程序，我将读入 3 个文件，然后迭代它们以执行一些功能来验证它们。在学习 Winforms 和 C# 时，我无法迭代并且似乎无法弄清楚。
// store each file path into a string
string nailAssignmentResult = textBox1.Text;
string nailFixtureResult = textBox2.Text;
string nailContactResult = textBox3.Text;
上面的声明将 3 个文本框的文件路径存储到字符串变量中，供我迭代。
我已经尝试过 foreach 循环和 for 循环，但我似乎无法弄清楚如何遍历它们。我想将每个文件中的信息解析成以空格分隔的列表。
namespace FixtureReports
{
public partial class btnFileSelect : Form
{
// contructor
public btnFileSelect()
{
InitializeComponent();
}
// this will do the verification
private void btnVerify_Click(object sender, EventArgs e)
{
// clear textbox each time its clicked
results.Clear();
//store each file path into a string
string nailAssignmentResult = textBox1.Text;
string nailFixtureResult = textBox2.Text;
string nailContactResult = textBox3.Text;
// error for if all three paths are empty
TextBox errorMessage = results;
if (nailAssignmentResult == "" && nailFixtureResult == "" && nailContactResult == "")
errorMessage.Text = "ERROR: Cannot have empty path for all three reports!!";
// verifying each file path exists
if (File.Exists(nailAssignmentResult))
errorMessage.AppendText("Nail Assignment Report Found");
if (File.Exists(nailFixtureResult))
errorMessage.AppendText("\r\nNail Fixture Report Found");
if (File.Exists(nailContactResult))
errorMessage.AppendText("\r\nNail Contact List Report Found");
// grab each file and iterate through each of them
// parse the contents into a list separated by a space horizontally
// for each line of data, what needs to be compared
// take in receiver pin and plug into brians function to get pylon
// compare to existing pylon designation in report and see if it matches
// have a counter for how many were correct
// if incorrect, display pylon blocks and receiver pins
}
// prompt for file selection
private void nailFixtureBtn_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
textBox1.Text = openFileDialog.FileName;
}
}
// prompt for file selection
private void nailAssignmentBtn_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
textBox2.Text = openFileDialog.FileName;
}
}
// prompt for file selection
private void nailContactBtn_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
textBox3.Text = openFileDialog.FileName;
}
}
}
}
为了“迭代”你需要一个集合。您可以从三个变量创建一个简单的数组：
var files = new[] {nailAssignmentResult, nailFixtureResult, nailContactResult};
并迭代 that，但是如果您在一个函数中有“处理”，您可以只传入文件名（以及需要的任何其他信息，那么您不需要需要迭代：
var assignmentResults = ProcessFile(nailAssignmentResult);
var fixtureResults = ProcessFile(nailFixtureResult);
var contractResults = ProcessFile(nailContactResult);
这只是两个选项 - 有很多方法可以做到这一点，包括创建一个使用
yield return从这个开始：
foreach( var line in File.ReadLines(nailAssignmentResult))
{
// ...
}
在深入之前，您需要编写更多自己的代码，并清楚规范。
另外：不要检查
File.Exists()因此
Exists()要遍历这三个文件，您可以使用 foreach 循环并将文件路径存储在数组或列表中。这是一个示例，说明如何修改 btnVerify_Click 方法以遍历文件并读取其内容：
private void btnVerify_Click(object sender, EventArgs e)
{
// clear textbox each time its clicked
results.Clear();
// store each file path into a string
string[] filePaths = { textBox1.Text, textBox2.Text, textBox3.Text };
// check if all three paths are empty
if (string.IsNullOrEmpty(filePaths[0]) && string.IsNullOrEmpty(filePaths[1]) && string.IsNullOrEmpty(filePaths[2]))
{
results.Text = "ERROR: Cannot have empty path for all three reports!!";
return;
}
// check if each file exists
foreach (string filePath in filePaths)
{
if (string.IsNullOrEmpty(filePath))
{
continue;
}
if (!File.Exists(filePath))
{
results.AppendText($"File {filePath} not found.\r\n");
return;
}
}
// iterate through each file
foreach (string filePath in filePaths)
{
if (string.IsNullOrEmpty(filePath))
{
continue;
}
// read the file contents and split by space
string[] lines = File.ReadAllLines(filePath);
List<string> items = new List<string>();
foreach (string line in lines)
{
items.AddRange(line.Split(' '));
}
// perform some function to verify the items in the list
// ...
// display the results
results.AppendText($"File {filePath} verified successfully.\r\n");
}
}
在这个例子中，我使用了一个数组来存储文件路径，但如果你愿意，你也可以使用一个列表。 foreach 循环用于遍历每个文件路径并检查文件是否存在。如果任何文件路径为空，则循环使用 continue 关键字跳到下一次迭代。如果未找到任何文件，则会显示错误消息并返回该方法。否则，将使用另一个 foreach 循环遍历每个文件并读取其内容。每个文件的内容按空格分割并存储在列表中，可用于进一步处理。最后，会显示一条消息，表明每个文件都已成功验证。