gdi+(1) 画直线

来源：互联网发布：python和qt做界面编辑：程序博客网时间：2024/04/29 14:57

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

//引入如下命名空间
using System.Drawing;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Bitmap bitmap = new Bitmap(200, 200);//创建位图
        Graphics g = Graphics.FromImage(bitmap);//创建画布
        g.Clear(Color.White);//清空背景色
        Pen myPen = new Pen(Color.Blue, 2);//创建画笔对象
        g.DrawLine(myPen, 0, 30, 200, 30);//绘制直线
        System.IO.MemoryStream ms = new System.IO.MemoryStream();
        bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
        Response.ClearContent();//清除缓存区中所有内容
        Response.ContentType = "image/Gif";//设置输出图片类型
        Response.BinaryWrite(ms.ToArray());//写入HTTP流输出到页面上
    }
}

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