C# - Printing the Form
Question
I am using the code from MS to print a form however it looks like the form needs to be visible with a Show/ShowDialog() to work.
I am trying to use the code for a form that I don't want to show.
Any ideas?
3 answers
solution1
0 2010-05-18 19:34:02
可能可以使用DrawToBitmap方法。
solution2
0 2010-05-18 19:46:47
If you are looking to print out data from the form in a relatively simple method, you might want to try this way instead. I use this method when I need to print something from a form. This uses a hidden WebBrowser control and works pretty good.
Sorry, the example is from a C++ project, but it converts nicely over to C#.
private: System::Void printButton_Click(System::Object^ sender, System::EventArgs^ e) {
StringBuilder^ html = gcnew StringBuilder();
html->Append( "<html><head></head><body>" );
html->Append( "<h1>Children Clocked In</h1>" );
html->Append( "<table>" );
html->Append( "<tr><td>Last Name</td><td>First Name</td><td>Classroom</td><td>Program</td><td>In Time</td></tr>" );
for each ( DataGridViewRow^ row in children->SelectedRows )
{
html->AppendFormat( "<tr><td>{0}</td><td>{1}</td><td>{2}</td><td>{3}</td><td>{4}</td></tr>",
row->Cells[2]->Value->ToString(),
row->Cells[3]->Value->ToString(),
row->Cells[4]->Value->ToString(),
row->Cells[5]->Value->ToString(),
Convert::ToDateTime(row->Cells[6]->Value).ToString("h:mm tt") );
}
html->Append( "</table>" );
html->Append( "</body></html>" );
WebBrowser^ webBrowser = gcnew WebBrowser();
webBrowser->Visible = false;
webBrowser->Parent = this;
webBrowser->DocumentCompleted += gcnew System::Windows::Forms::WebBrowserDocumentCompletedEventHandler(this, &FormChildrenClockedIn::webBrowser1_DocumentCompleted);
webBrowser->DocumentText = html->ToString();
}
private: System::Void webBrowser1_DocumentCompleted(System::Object^ sender, System::Windows::Forms::WebBrowserDocumentCompletedEventArgs^ e) {
((WebBrowser^)sender)->ShowPrintPreviewDialog();
delete (WebBrowser^)sender;
}
solution3
0 ACCPTED 2010-05-18 20:32:59
Simplest way is to just open it somewhere outside the screen like
this.Position=new Point(-100000,-100000);
print it and then close it.
(don't forget about multiple monitors, that's why I used such big numbers).
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