在C#中进行SlimDX屏幕捕获时,未处理NullReferenceException

本文关键字:未处理 NullReferenceException 屏幕 SlimDX | 更新日期: 2023-09-27 18:27:16

尝试使用SlimDX:进行屏幕截图

using System;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using SlimDX.Direct3D9;
using SlimDX;
namespace dxcapture
{
    public partial class Form1 : Form
    {
        public Device device;
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            using (SlimDX.Direct3D9.Surface surface = device.GetRenderTarget(0))
            {
                using (SlimDX.Direct3D9.Surface surface2 = SlimDX.Direct3D9.Surface.CreateOffscreenPlain(device, surface.Description.Width, surface.Description.Height, surface.Description.Format, SlimDX.Direct3D9.Pool.SystemMemory))
                {
                    device.GetRenderTargetData(surface, surface2);
                    Bitmap bitmap = new Bitmap(SlimDX.Direct3D9.Surface.ToStream(surface2, SlimDX.Direct3D9.ImageFileFormat.Bmp, new Rectangle(0, 0, 110, 110)));
                    bitmap.Save(@"c:'wqwqwqwqwqwqwqwq.bmp");
                }
            }
        }
    }
}

获取错误:

未处理NullReferenceException。对象引用未设置为对象的实例。

在线路上:

using (SlimDX.Direct3D9.Surface surface = device.GetRenderTarget(0))

我做错了什么?

在C#中进行SlimDX屏幕捕获时,未处理NullReferenceException

您永远不会初始化"设备"。

在类定义中有public Device device;,但从未分配它。