ASP.NET实现进度条效果

我们先看下进度条效果

我点击了按钮后他会显示进度页面，进度完成后，进度条消失，其实也是比较简单的了。

我们需要一个进度条代码文件progressbar.htm（注意：是没有head这些标签的）

<script language="javascript">
  function setporgressbar(pos) {
    //设置进度条居中

    var screenwidth = document.body.offsetwidth;
    progressbarside.style.width = math.round(screenwidth / 2) + "px";
    progressbarside.style.left = math.round(screenwidth / 4) + "px";
    progressbarside.style.top = "50px";
    progressbarside.style.height = "21px";
    progressbarside.style.display = "block";

    //设置进度条百分比 
    progressbar.style.width = pos + "%";
    progresstext.innerhtml = pos + "%";
  }

  function setmaxvalue(maxvalue) {
    progressbarside.style.width = maxvalue + "px";
  }

  //完成后隐藏进度条
  function setcompleted() {
    progressbarside.style.display = "none";
  }

  function settitle(title) {
    progresstitle.innerhtml = title;
  }
</script>
<div id="progressbarside" style="position: absolute; height: 21px; width: 100px;
  color: silver; border-width: 1px; border-style: solid; display: block">
  <div id="progressbar" style="position: absolute; height: 21px; width: 0%; background-color: #1475bb">
  </div>
  <div id="progresstext" style="position: absolute; height: 21px; width: 100%; text-align: center">
  </div>
  <div id="progresstitle" style="position: absolute; height: 21px; top: 21px; width: 100%;
    text-align: center">
  </div>
</div>

然后需要一个进度条类progressbar.cs

using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.io;

namespace zhuoyuee.dop.web.ui
{
  /// <summary>
  ///显示进度条
  /// </summary>
  public class progressbar : system.web.ui.page
  {
    /// <summary>
    /// 最大值
    /// </summary>
    private int maxvalue
    {
      get
      {
        if (viewstate["maxvalue"] == null)
        {
          return 0;
        }
        else
        {
          return convert.toint32(viewstate["maxvalue"]);
        }
      }
      set
      {
        viewstate["maxvalue"] = value;
      }
    }
    /// <summary>
    /// 当前值
    /// </summary>
    private int thisvalue
    {
      get
      {
        if (viewstate["thisvalue"] == null)
        {
          return 0;
        }
        else
        {
          return convert.toint32(viewstate["thisvalue"]);
        }
      }
      set
      {
        viewstate["thisvalue"] = value;
      }
    }
    /// <summary>
    /// 当前页面
    /// </summary>
    system.web.ui.page m_page;
    /// <summary>
    /// 功能描述:构造函数
    /// 作　　者:huangzh
    /// 创建日期:2016-05-06 11:54:34
    /// 任务编号:
    /// </summary>
    /// <param name="page">当前页面</param>
    public progressbar(system.web.ui.page page)
    {
      m_page = page;
    }

    public void setmaxvalue(int intmaxvalue)
    {
      maxvalue = intmaxvalue;
    }

    /// <summary>
    /// 功能描述:初始化进度条
    /// 作　　者:huangzh
    /// 创建日期:2016-05-06 11:55:26
    /// 任务编号:
    /// </summary>
    public void initprogress()
    {
      //根据progressbar.htm显示进度条界面
      string templatefilename = appdomain.currentdomain.basedirectory + "progressbar.htm";
      streamreader reader = new streamreader(@templatefilename, system.text.encoding.getencoding("gb2312"));
      string strhtml = reader.readtoend();
      reader.close();
      m_page.response.write(strhtml);
      m_page.response.flush();
    }

    /// <summary>
    /// 功能描述:设置标题
    /// 作　　者:huangzh
    /// 创建日期:2016-05-06 11:55:36
    /// 任务编号:
    /// </summary>
    /// <param name="strtitle">strtitle</param>
    public void settitle(string strtitle)
    {
      string strjsblock = "<script>settitle('" + strtitle + "'); </script>";

      m_page.response.write(strjsblock);
      m_page.response.flush();
    }

    /// <summary>
    /// 功能描述:设置进度
    /// 作　　者:huangzh
    /// 创建日期:2016-05-06 11:55:45
    /// 任务编号:
    /// </summary>
    /// <param name="percent">percent</param>
    public void addprogress(int intpercent)
    {
      thisvalue = thisvalue + intpercent;
      double dblstep = ((double)thisvalue / (double)maxvalue) * 100;

      string strjsblock = "<script>setporgressbar('" + dblstep.tostring("0.00") + "'); </script>";

      m_page.response.write(strjsblock);
      m_page.response.flush();
    }


    public void disponseprogress()
    {
      string strjsblock = "<script>setcompleted();</script>";
      m_page.response.write(strjsblock);
      m_page.response.flush();
    }
  }
}

然后就是调用方法了，调用很简单，在页面的按钮事件或者其他什么地方加入代码，如在按钮事件里这么用

protected void btnimport_click(object sender, eventargs e)
    {
      progressbar pb = new progressbar(this);
      pb.setmaxvalue(110);
      pb.initprogress();
      pb.settitle("这是一个测试数据");
      for (int i = 1; i <= 110; i++)
      {
        pb.addprogress(1);
        //此处用线程休眠代替实际的操作，如加载数据等
        system.threading.thread.sleep(50);
      }
      pb.disponseprogress();
    }

怎么样，是不是很简单呢。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。