c# - 我可以在 .NET 3.5 的代码隐藏中打印标准测试页吗？

Question

如果我有网络打印机的名称，是否可以通过 C# 代码在 WPF 中打印标准测试页？

谢谢!

Answer 1

以下是使用 System.Management 命名空间访问 WMI 并将测试页打印到打印机的示例。这依赖于连接到计算机的打印机，如果您也需要，我可以提供通过 System.Management 连接网络打印机的代码。此代码适用于任何版本的 .Net Framework

using System;
using System.Management;

public class PrintTestPageUsingWMI
{
    private String _name;
    private ManagementObject _printer = null;

    public PrintTestPageUsingWMI(String printerName)
    {
        this._name = printerName;

        //Find the Win32_Printer which is a Network Printer of this name

        //Declare WMI Variables
        ManagementObject MgmtObject;
        ManagementObjectCollection MgmtCollection;
        ManagementObjectSearcher MgmtSearcher;

        //Perform the search for printers and return the listing as a collection
        MgmtSearcher = new ManagementObjectSearcher("Select * from Win32_Printer");
        MgmtCollection = MgmtSearcher.Get();

        foreach (ManagementObject objWMI in MgmtCollection)
        {
            if (objWMI.Item("sharename").ToString().Equals(this._name))
            {
                this._printer = objWMI;
            }
        }

        if (this._printer == null)
        {
            throw new Exception("Selected Printer is not connected to this Computer");
        }        
    }

    public void PrintTestPage()
    {
        this.InvokeWMIMethod("PrintTestPage");
    }

    /// <summary>
    /// Helper Method which Invokes WMI Methods on this Printer
    /// </summary>
    /// <param name="method">The name of the WMI Method to Invoke</param>
    /// <remarks></remarks>
    private void InvokeWMIMethod(String method) {
        if (this._printer == null)
        {
            throw new Exception("Can't Print a Test Page on a Printer which is not connected to the Computer");
        }

        Object[] objTemp = new Object[0] { null };
        ManagementObject objWMI;

        //Invoke the WMI Method
        this._printer.InvokeMethod(method, objTemp);
    }
}

或者，您可以查看 .Net 3.0 及更高版本中支持的 System.Printing 命名空间