public static string DoEnterPassword(string fileName)
{
using (PasswordForm f = new PasswordForm())
return(f.EnterPassword(fileName));
}
/// <summary>
/// Start the text search asynchronously.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnFind_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(tbFile.Text))
{
MessageBox.Show(this, "Please select a PDF file.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (!File.Exists(tbFile.Text))
{
MessageBox.Show(this, string.Format("File \"{0}\" does not exist.", tbFile.Text), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (string.Compare(_loadedFile, tbFile.Text, true) != 0)
{
// Load the specified PDF file into c1PdfDocumentSource1.
// The loop allows the user to specify a password for an encrypted file.
while (true)
{
try
{
c1PdfDocumentSource1.LoadFromFile(tbFile.Text);
_loadedFile = tbFile.Text;
break;
}
catch (PdfPasswordException)
{
string password = PasswordForm.DoEnterPassword(tbFile.Text);
if (password == null)
{
return;
}
c1PdfDocumentSource1.Credential.Password = password;
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
}
// Clear the previously found positions, if any, and start the search.
// Note the use of the FindStartAsync version of the FindStart method (a synchronous version is also available):
lvFoundPositions.Items.Clear();
C1FindTextParams ftp = new C1FindTextParams(tbFindText.Text, cbxWholeWord.Checked, cbxCaseSensitive.Checked);
if (rbWholeDocument.Checked)
{
_textSearchManager.FindStartAsync(0, SearchScope.WholeDocument, ftp, false);
}
else
{
int pageNum = (int)nudPageIndex.Value;
if (pageNum < 1 || pageNum > c1PdfDocumentSource1.PageCount)
{
MessageBox.Show(string.Format("Page should be from 0 to {0}.", c1PdfDocumentSource1.PageCount), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
_textSearchManager.FindStartAsync(pageNum - 1, SearchScope.SinglePage, ftp, false);
}
}
// Update controls and show the progress bar:
UpdateControls();
pbFind.Value = 0;
pbFind.Visible = true;
}
