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SunilKumarSunilKumar 

how to download the dashboard from visuvalforcepage in the excel sheet

I have a dashboard which is presented in the vf page So When i am trying to download the dashboard from that it is downloaded but 
it is not display in the chart format it is downloaded in the form values

<apex:page sidebar="false" contentType="application/vnd.ms-excel#mycontacts.xls" >
 <apex:iframe src="https://fujitsumohan572-dev-ed.my.salesforce.com/servlet/servlet.ChartServer?rsid=0FL28000000vWWi&ruid=00528000000JJTn&did=01Z28000000OQgb&s=7&fs=10&tfg=12&tfs=-16777216&explode=0&c=pie&cs=0&title=&eh=yes&compo=yes&fg=-16777216&bg1=-1&bg2=-1&bgdir=2&dl1=Type&dl2=&l=2&sax=yes&Yman=no&nc=0&actUrl=%2F00O2800000ACeyW&sd=1&scv=yes&sct=no&spt=yes&bd=yes&cu=INR&ab=X&u=0&vt=0&ab2=Y&u2=0&vt2=0&vl0=Record+Count&spoc=no&topn=no&gc0=-1&gc1=-1&gc2=-1&sona=0&refreshts=1507802992000" height="1000" />
</apex:page> 

Thanks