protected void btnSnapshot_Click(object sender, EventArgs e)
{
string url = txtUrl.Text;
string html = txtHtml.Text;
string fold = "~/Images/Snapshot/";//图片存放目录
string physicsFold = Server.MapPath(fold);
try
{
string guid = "";
if (string.IsNullOrEmpty(url))
{
guid = WebPreview.GetHtmlPreview(html, physicsFold);
}
else
{
guid = WebPreview.GetUrlPreview(url, physicsFold);
}
string fileName = "img_" + guid + ".jpg";
imgPrevew.ImageUrl = "~/Images/Snapshot/" + fileName;
}
catch
{
throw;
}
}
private void btnSnap2_Click(object sender, EventArgs e)
{
if (this.txtUrl.Text.Length == 0)
{
return;
}
this.pictureBox1.Image = WebPreview.GetWebPreview(new Uri(this.txtUrl.Text), Screen.PrimaryScreen.Bounds.Size);
}
void ReleaseDesignerOutlets()
{
if (WebPreview != null)
{
WebPreview.Dispose();
WebPreview = null;
}
if (ZoomLevel != null)
{
ZoomLevel.Dispose();
ZoomLevel = null;
}
if (StatusBar != null)
{
StatusBar.Dispose();
StatusBar = null;
}
}
public byte[] GetHeatMapImage(string beginTime, string endTime, string url, string urlEncoding, int screenWidth, int screenHeight)
{
/*
* 1.获取Url网页快照
* 2.查询数据库访客点击表记录
* 3.校正偏移访客点击坐标点数据
* 4.绘制访客点击热力图
* 5.缓存查询结果并返回热力图
*/
try
{
//获取网页快照
var webPageImage = WebPreview.GetWebPreview(new Uri(url), 30000, screenWidth, screenHeight, true);
//设置heatPoint
var apiUrl = string.Format(ApiFormat, urlEncoding, beginTime, endTime, screenWidth, screenHeight);
var json = GetHtmlSource(apiUrl);
var heatMapMessage = JsonConvert.DeserializeObject <List <HeatMapMessage> >(json);
var heatPoints = new List <HeatPoint>();
if (heatMapMessage != null)
{
heatPoints = heatMapMessage.Select(m => new HeatPoint {
W = 1, X = m.X, Y = m.Y
}).ToList();
}
//生成热力图
var heatMapMaker = new HeatMapMaker
{
Width = webPageImage.Width,
Height = webPageImage.Height,
Radius = 20,
ColorRamp = ColorRamp.THERMAL,
HeatPoints = heatPoints,
Opacity = 0.8f
};
var heatMapImage = heatMapMaker.MakeHeatMap().Result;
//场景图与热力图合并
using (var g = Graphics.FromImage(webPageImage))
{
var rectangle = new Rectangle(0, 0, webPageImage.Width, webPageImage.Height);
g.DrawImage(heatMapImage, rectangle);
}
//加入缓存
var imageBytes = webPageImage.ToImageBytes();
webPageImage.Dispose();
return(imageBytes);
}
catch (Exception ex)
{
_logger.Error(ex);
return(null);
}
}
/// <summary>
/// Prints the preview.
/// </summary>
public void PrintPreview()
{
WebPreview.Print(this);
}