在窗体的Paint事件中，画字符串“你好！”；
函数Draw1按创建的画刷和字体在给定位置输出给定字符串；
按下button1，输出“哈哈哈，大笑三声！”
按下button2，所画内容是为了研究半角字符和全角字符的ascii码是否相同，把一个ascii字符转换成ascii码(8位)和转换成32位整型其值是否相等；
按下button3, 输出自己构造的一个DataTable的内容和记录数；
按下button4，输出自己构造的另一个DataTable的内容和记录数；
代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace str1
{
public partial class Form1 : Form
{
DataTable namesTable,namesTable2;
public Form1()
{
InitializeComponent();
this.Paint += new System.Windows.Forms.PaintEventHandler(Form1_Paint);
namesTable = new DataTable("JHYDJF");
namesTable2 = new DataTable("JHYDJF2");
}
private void button1_Click(object sender, EventArgs e)
{
string a = "哈哈哈，大笑三声!";
Draw1(a,50,50);
}
void Draw1(string str1,int xPos=0,int yPos=0)
{
SolidBrush aBrush = new SolidBrush(Color.Blue);
Font aFont = new Font("Arial", 12, FontStyle.Bold, GraphicsUnit.Millimeter);
Graphics graphic = this.CreateGraphics();
graphic.DrawString(str1, aFont, aBrush, xPos, yPos);
}
void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics g = e.Graphics;
Font f = new Font("宋体", 10);
g.DrawString("你好！", f, Brushes.Black, 20, 20);
}
private void button2_Click(object sender, EventArgs e)
{
char a = '(';
char b = '（';
byte a1 = Convert.ToByte(a);
int b1 = Convert.ToInt32(b);
int ia1 = Convert.ToInt32(a);
Draw1(Convert.ToString(a1),100,100);
Draw1(Convert.ToString(b1),100,130);
Draw1(Convert.ToString(ia1), 100, 160);
}
private void CreateDSet()
{
DataColumn numColumn = new DataColumn();
numColumn.DataType = System.Type.GetType("System.String");
numColumn.ColumnName = "num";
namesTable.Columns.Add(numColumn);
DataColumn feColumn = new DataColumn();
feColumn.DataType = System.Type.GetType("System.Int32");
feColumn.ColumnName = "fe";
namesTable.Columns.Add(feColumn);
}
private void button3_Click(object sender, EventArgs e)
{
DataRow row;
CreateDSet();
for (int i = 0; i < 5; i++)
{
row = namesTable.NewRow();
row["num"] = "15652303852";
row["fe"] = "1";
namesTable.Rows.Add(row);
}
for (int j = 0; j < 5; j++)
{
Draw1(namesTable.Rows[j][0].ToString(), 100, 200 + j * 35);
Draw1(namesTable.Rows[j][1].ToString(), 400, 200 + j * 35);
}
Draw1(namesTable.Rows.Count.ToString(), 50, 200 );
}
private void CreateDSet2()
{
DataColumn numColumn2 = new DataColumn();
numColumn2.DataType = System.Type.GetType("System.String");
numColumn2.ColumnName = "num2";
namesTable2.Columns.Add(numColumn2);
DataColumn feColumn2 = new DataColumn();
feColumn2.DataType = System.Type.GetType("System.Int32");
feColumn2.ColumnName = "fe2";
namesTable2.Columns.Add(feColumn2);
DataRow row;
for (int i = 0; i < 5; i++)
{
row = namesTable2.NewRow();
row["num2"] = "15652303852";
row["fe2"] = "1";
namesTable2.Rows.Add(row);
}
namesTable2.Rows[2][0] = "13900000001";
}
private void button4_Click(object sender, EventArgs e)
{
CreateDSet2();
for (int i = 0; i < 5; i++)
{
Draw1(namesTable2.Rows[i][0].ToString(), 100, 450 + i * 30);
Draw1(namesTable2.Rows[i][1].ToString(), 500, 450 + i * 30);
}
Draw1(namesTable2.Rows.Count.ToString(), 50, 450);
}
}
}