我构建了一个 Windows 窗体应用程序,它可以打开任何文本文件(甚至是使用 iTextSharp Dll 的 pdf 文件)并在富 tex 框中查看其内容,这是一个搜索字段,我可以在其中搜索特定模式,所有可能的匹配项都会在“Gold”中突出显示颜色。我创建了一个保存按钮。
- 如何通过保留文本格式用突出显示的文本覆盖文本文件(.doc)?
- 我怎样才能用pdf做同样的步骤?(因为覆盖文件后pdf会崩溃)
编码:
private void open_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
tb.Clear();
label1.Text = openFileDialog1.FileName;
if (label1.Text.Contains(".pdf"))
{
// create a reader (constructor overloaded for path to local file or URL)
string location = openFileDialog1.FileName;
PdfReader reader = new PdfReader(location);
StringBuilder text = new StringBuilder();
for (int page = 1; page <= reader.NumberOfPages; page++)
{
ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
string currentText = PdfTextExtractor.GetTextFromPage(reader, page, strategy);
currentText = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.Default, Encoding.UTF8, Encoding.Default.GetBytes(currentText)));
text.Append(currentText);
reader.Close();
}
tb.Text = text.ToString();
}
else
{
tb.Text = File.ReadAllText(label1.Text);
}
}
}
private void save_Click(object sender, EventArgs e)
{
SaveFileDialog saveFile1 = new SaveFileDialog();
if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
File.WriteAllText(saveFileDialog1.FileName, tb.Text);
}
}
private void search_Click(object sender, EventArgs e)
{
int index = 0;
while (index < tb.Text.LastIndexOf(sb.Text))
{
tb.Find(sb.Text,index,tb.TextLength,RichTextBoxFinds.None);
tb.SelectionBackColor = Color.Gold;
index = tb.Text.IndexOf(sb.Text, index) + 1;
}
}
提前致谢!