![](/img/trans.png)
[英]How can I open a specific text file without using OpenFileDialog?
[英]How can i be sure if a text file i open with OpenFileDialog is just regular text file or html content?
string filename = "";
private void openToolStripMenuItem1_Click(object sender, EventArgs e)
{
OpenFileDialog theDialog = new OpenFileDialog();
theDialog.Title = "Open Text File";
theDialog.Filter = "TXT files|*.txt";
theDialog.InitialDirectory = @"C:\";
if (theDialog.ShowDialog() == DialogResult.OK)
{
lines = File.ReadAllLines(RecentFiles);
filename = theDialog.FileName;
if (!lines.Any(line => line.Equals(filename)))
{
recentfiles = new StreamWriter(RecentFiles, true);
recentfiles.WriteLine(theDialog.FileName);
recentfiles.Close();
}
items = File
.ReadLines(RecentFiles)
.Select(line => new ToolStripMenuItem()
{
Text = line
})
.ToArray();
recentFilesToolStripMenuItem.DropDownItems.Clear();
recentFilesToolStripMenuItem.DropDownItems.AddRange(items);
TextFileContentToRichtextbox(filename);
}
}
当我打开文本文件并将其添加到richTextBox时,如果我先将网站页面源视图内容复制到文本文件,然后打开该文本文件,我怎么知道内容是html代码还是普通文本?
同样,当我直接粘贴到richTextBox窗口时,我想知道文本是html代码还是常规文本,然后决定如何继续。
如果要查看文件“外观”是否为HTML,则可以检查文本文件中是否存在某些HTML特定文本(“ <body>
”,...)。
如果要使用HTMLAgilityPack确保HTML有效,则可以执行以下操作:
string html = File.ReadAllText(path);
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(html);
if (htmlDoc.ParseErrors.Count() > 0)
{
throw new InvalidOperationException("Not a valid HTML file");
}
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