如何从 OpenFileDialog 获取文件的路径并将其传递给 PDFReader?(C#)

Question

OpenFileDialog ofd = new OpenFileDialog();
private void button1_Click(object sender, EventArgs e)
{
ofd.Filter = "PDF|*.pdf";
if (ofd.ShowDialog() == DialogResult.OK)
{ 
richTextBox1.Text = ofd.SafeFileName;
}
}
public static string pdfText(string path)
{
//this is the error, I cannot get the path of the File I chose from the OpenFileDialog
PdfReader reader = new PdfReader(ofd.FileName); 
string text = string.Empty;
for (int page = 1; page <= reader.NumberOfPages; page++)
{
text = text += PdfTextExtractor.GetTextFromPage(reader, page);
}
reader.Close();
return text;
}

我需要从OpenFileDialog中获取用户选择的文件的路径，但我无法将其传递给PDFReader

Answer 1

1( 您不能在static方法中使用类变量，因此访问以下行中的ofd：

PdfReader reader = new PdfReader(ofd.FileName); 

应导致编译器错误消息

对于非静态字段"ofd"，需要一个对象实例。

2(您似乎没有调用您的方法。您需要调用它并将文件名作为参数传递到其中

private void button1_Click(object sender, EventArgs e)
{
ofd.Filter = "PDF|*.pdf";
if (ofd.ShowDialog() == DialogResult.OK)
{ 
richTextBox1..Text = pdfText(ofd.SafeFileName);
}    
}

然后你需要在方法中使用方法参数：

public static string pdfText(string path)
{
//this is the error, I cannot get the path of the File I chose from the OpenFileDialog
PdfReader reader = new PdfReader(path); // Here use path

现在返回的字符串应该出现在您的richTextBox1