彩票走势图

　　本文主要说说webchart和teechart控件导出图片的方法，希望对大家有帮助。

webchart控件导出方法：

用个html控件添加onclick事件：onclick="go(document.getElementById('Chart1').src)"
“Chart1”是webchart控件的id

<iframe id="frame1" style="DISPLAY:none; Z-INDEX:103; LEFT:512px; POSITION:absolute; TOP:232px">
</iframe>
<script language="JScript">
var n=0;
function go(url){
n==0?new function(){frames("frame1").location=url,n=1}:null;
document.all("frame1").readyState!="complete"?setTimeout(go,10):so();
function so(){frames("frame1").document.execCommand("SaveAs"),n=0};
}
</script>

teechart控件图片导出方法：

private void OutPicture_Click(object sender, System.Web.UI.ImageClickEventArgs e) //导出图片按钮，要确保项目根目录下有ChartImage文件夹用于存放保存下来的图片，然后利用下载文件导出
{
string C= Server.MapPath("ChartImage\")+"chart.png";

WebChart1.Chart.Export.Image.PNG.Save(C);
FileDownload(Server.MapPath("." + "/ChartImage/chart.png"));
}
private void FileDownload(string FullFileName)
{
FileInfo DownloadFile = new FileInfo(FullFileName);
Response.Clear();
Response.ClearHeaders();
Response.Buffer = false;
Response.ContentType = "application/octet-stream";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
Response.WriteFile(DownloadFile.FullName);
Response.Flush();
Response.End();
Response.Close();
}

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