Getting entity record counts

There are couple of ways to gets entity record counts: you could use XrmToolBox’s Record Counter Tool, or write the FetchXml to count the records as you navigate from one page to the next. But, if you just want to use the SDK here is a simple method: a new message called RetrieveTotalRecordCountRequest. Here is how to use it in C#:

var r = new RetrieveTotalRecordCountRequest();
r.EntityNames = new[] {
"contact", "account"
};
var m = ((RetrieveTotalRecordCountResponse)this.Execute(r)).EntityRecordCountCollection;
m.Dump();

Retrieve Record Count

Here is the same call in JavaScript:

var entities = ['contact','account'];
fetch(`${Xrm.Utility.getGlobalContext().getClientUrl()}/api/data/v9.1/RetrieveTotalRecordCount(EntityNames=@EntityNames)?@EntityNames=${encodeURIComponent(JSON.stringify(entities))}`, {
	credentials: 'include',
	headers: {
		'accept': 'application/json',
		'content-type': 'application/json; charset=utf-8',
		'odata-maxversion': '4.0',
		'odata-version': '4.0',
	},
	method: 'GET',
	mode: 'cors'
})
.then(x => x.json())
.then(r => console.log(r.EntityRecordCountCollection.Keys.forEach((k, i) => console.log(`${k}: ${r.EntityRecordCountCollection.Values[i]}`))));

Retrieve Record Count JS

Hope this is useful.

Reference:

https://docs.microsoft.com/en-us/dotnet/api/microsoft.crm.sdk.messages.retrievetotalrecordcountrequest?view=dynamics-general-ce-9