Export (0) Print
Expand All

PrinterSettings.IsValid Property

Gets a value indicating whether the PrinterName property designates a valid printer.

Namespace:  System.Drawing.Printing
Assembly:  System.Drawing (in System.Drawing.dll)

public bool IsValid { get; }

Property Value

Type: System.Boolean
true if the PrinterName property designates a valid printer; otherwise, false.

When you get or set some properties, a valid printer is required or else an exception is raised. To avoid exceptions, use the IsValid property after setting the PrinterName to safely determine if the printer is valid.

The following code example specifies the target printer by setting the PrinterName property, and if the IsValid is true, prints the document on the specified printer. The example has three prerequisites:

  • A variable named filePath has been set to the path of the file to print.

  • A method named pd_PrintPage, which handles the PrintPage event, has been defined.

  • A variable named printer has been set to the printer's name.

Use the System.Drawing, System.Drawing.Printing, and System.IO namespaces for this example.

public void Printing(string printer) {
  try {
    streamToPrint = new StreamReader (filePath);
    try {
      printFont = new Font("Arial", 10);
      PrintDocument pd = new PrintDocument(); 
      pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
      // Specify the printer to use.
      pd.PrinterSettings.PrinterName = printer;

      if (pd.PrinterSettings.IsValid) {
         pd.Print();
      } 
      else {	
         MessageBox.Show("Printer is invalid.");
      }
    } 
    finally {
      streamToPrint.Close();
    }
  } 
  catch(Exception ex) {
    MessageBox.Show(ex.Message);
  }
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft