System.NullReferenceException: 未将对象引用设置到对象的实例
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;
namespace proTracker1
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListView listView1;
private System.Windows.Forms.ColumnHeader columnHeader1;
private System.Windows.Forms.ColumnHeader columnHeader2;
private System.Windows.Forms.ColumnHeader columnHeader3;
private System.Windows.Forms.ColumnHeader columnHeader4;
private System.Windows.Forms.ColumnHeader columnHeader5;
private System.Windows.Forms.ColumnHeader columnHeader6;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Diagnostics.Process[] procList=new Process[100];
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
AddProcesses();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.listView1 = new System.Windows.Forms.ListView();
this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
this.columnHeader2 = new System.Windows.Forms.ColumnHeader();
this.columnHeader3 = new System.Windows.Forms.ColumnHeader();
this.columnHeader4 = new System.Windows.Forms.ColumnHeader();
this.columnHeader5 = new System.Windows.Forms.ColumnHeader();
this.columnHeader6 = new System.Windows.Forms.ColumnHeader();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// listView1
//
this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
this.columnHeader1,
this.columnHeader2,
this.columnHeader3,
this.columnHeader4,
this.columnHeader5,
this.columnHeader6});
this.listView1.Dock = System.Windows.Forms.DockStyle.Top;
this.listView1.Location = new System.Drawing.Point(0, 0);
this.listView1.Name = "listView1 ";
this.listView1.Size = new System.Drawing.Size(528, 320);
this.listView1.TabIndex = 0;
this.listView1.View = System.Windows.Forms.View.Details;
//
// columnHeader1
//
this.columnHeader1.Text = "印象名称 ";
//
// columnHeader2
//
this.columnHeader2.Text = "PID ";
//
// columnHeader3
//
this.columnHeader3.Text = "CPU ";
//
// columnHeader4
//
this.columnHeader4.Text = "优先级 ";
//
// columnHeader5
//
this.columnHeader5.Text = "内存使用 ";
//
// columnHeader6
//
this.columnHeader6.Text = "虚拟内存 ";
//
// button1
//
this.button1.Location = new System.Drawing.Point(104, 344);
this.button1.Name = "button1 ";
this.button1.TabIndex = 1;
this.button1.Text = "btnkill ";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(264, 344);
this.button2.Name = "button2 ";
this.button2.TabIndex = 2;
this.button2.Text = "btnRefresh ";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(528, 373);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.listView1);
this.Name = "Form1 ";
this.Text = "Form1 ";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
if(listView1.SelectedItems.Count <0)
{
MessageBox.Show( "Invalid Selection ");
return;
}
for(int i=listView1.SelectedItems.Count-1;i> =0; i--)
{
ListViewItem li=listView1.SelectedItems[i];
for(int j=0;j <procList.Length;j++)
{
if(procList[j].ProcessName==li.Text)
{
procList[j].Kill();
}
}
listView1.Items.Remove(li);
}
}
public void InitializeListView()
{
this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[]
{
this.columnHeader1,
this.columnHeader2,
this.columnHeader3,
this.columnHeader4,
this.columnHeader5,
this.columnHeader6,
});
this.listView1.ForeColor=System.Drawing.SystemColors.WindowText;
this.listView1.FullRowSelect=true;
this.listView1.GridLines=true;
this.listView1.Location=new System.Drawing.Point(10,19);
this.listView1.Name= "listView1 ";
this.listView1.Size=new System.Drawing.Size(615,277);
this.listView1.Sorting=System.Windows.Forms.SortOrder.Ascending;
this.listView1.TabIndex=0;
this.listView1.TabStop=false;
this.listView1.View=System.Windows.Forms.View.Details;
//this.listView1.KeyDown+=new System.Windows.Forms.KeyEventHandler(this.ListView1_KeyDown);
this.columnHeader1.Text= "印象名称 ";
this.columnHeader2.Text= "PID ";
this.columnHeader3.Text= "CPU ";
this.columnHeader4.Text= "优先级 ";
this.columnHeader5.Text= "内存使用 ";
this.columnHeader6.Text= "虚拟内存 ";
try
{
procList=Process.GetProcesses();
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
protected void AddProcesses()
{
int iVirtual,iPhysical;
for(int i=0;i <procList.Length;i++)
{
iPhysical=procList[i].WorkingSet/1024;
iVirtual=procList[i].VirtualMemorySize/1024;
listView1.Items.Add(new ListViewItem(new String [] {
procList[i].ProcessName,procList[i].Id.ToString(),procList[i].TotalProcessorTime.ToString(),
procList[i].BasePriority.ToString(),iPhysical.ToString()+ "K ",iVirtual.ToString()+ "K "}
) );
}
}
private void button2_Click(object sender, System.EventArgs e)
{
listView1.Clear();
}
}
}
我调试了很久,也上网查了下,但还是没能解决
显示的是System.NullReferenceException: 未将对象引用设置到对象的实例
哪位大虾能帮点拨下偶~~在下感激不尽~~~
[解决办法]
在调用 AddProcesses()加上这句
procList = Process.GetProcesses();
AddProcesses();
另获取procList[i].TotalProcessorTime可能发生违例
