using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace IsNum
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Button button1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(0, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(232, 23);
this.label1.TabIndex = 0;
this.label1.Text = "label1";
//
// label2
//
this.label2.Location = new System.Drawing.Point(0, 40);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(232, 23);
this.label2.TabIndex = 1;
this.label2.Text = "label2";
//
// button1
//
this.button1.Location = new System.Drawing.Point(120, 128);
this.button1.Name = "button1";
this.button1.TabIndex = 2;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.button1);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void Form1_Load(object sender, System.EventArgs e)
{
}
public void Test1(int count)
{
string testData="123456789925465465465";
DateTime t1=System.DateTime.Now;
for(int i=0;i<count;i++)
{
IsNum1(testData);
}
DateTime t2=System.DateTime.Now ;
this.label1.Text ="Test1:"+(t2 -t1 ).ToString();
}
public void Test2(int count)
{
string testData="123456789925465465465";
DateTime t1=System.DateTime.Now ;
for(int i=0;i<count;i++)
{
IsNum2(testData);
}
DateTime t2=System.DateTime.Now ;
this.label2.Text ="Test2:"+(t2 -t1 ).ToString();
}
public static bool IsNum1(string str)
{
for(int i=0;i<str.Length;i++)
{
if(str[i]<='0' || str[i]>='9')
return false;
}
return true;
}
protected static bool IsDigit(char ch)
{
switch (ch)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
{
return true;
}
}
return false;
}
public static bool IsNum2(string str)
{
for(int i=0;i<str.Length;i++)
{
if( IsDigit(str[i]) ) return false;
}
return true;
}
private void button1_Click(object sender, System.EventArgs e)
{
int count=100000;
Test1(count);
Test2(count);
}
}
}
测试结果:
IsNum2的性能要好于IsNum1
