c# - 无对话框自动打印

Question

我找到了打印代码。但是我想在没有对话框的情况下自动发送到打印机。我知道打印机名称。我从 SQL 表中获取打印机名称。我该怎么做？

// select printer and get printer settings
PrintDialog pd = new PrintDialog();
if (pd.ShowDialog() != true) 
{
    return; 
}
        
// create a document
FixedDocument document = new FixedDocument();
document.DocumentPaginator.PageSize = new Size(pd.PrintableAreaWidth, pd.PrintableAreaHeight);

// create a page
FixedPage page1 = new FixedPage();
page1.Width = document.DocumentPaginator.PageSize.Width;
page1.Height = document.DocumentPaginator.PageSize.Height;

// add some text to the page
TextBlock page1Text = new TextBlock();
page1Text.Text = "This is a text"
page1Text.FontSize = 12; // 30pt text
page1Text.Margin = new Thickness(50); // 1 inch margin
page1.Children.Add(page1Text);

// add the page to the document
PageContent page1Content = new PageContent();
((IAddChild)page1Content).AddChild(page1);
document.Pages.Add(page1Content);

// and print
pd.PrintDocument(document.DocumentPaginator, "Print");

Answer 1

尝试直接使用 PrintDocument 类而不是 PrintDialog 类，您可以在其中通过名称设置打印机:

using System.Drawing.Printing;

PrintDocument pd = new PrintDocument();
pd.PrinterSettings.PrinterName = "my printer";

遍历可用的打印机名称:

foreach (string s in PrinterSettings.InstalledPrinters) {
  //
}