CHUVASH.eu

CHunky Universe of Vigourous Astonishing SHarepoint :)

Push a copy of an object to client

To reduce postbacks and database calls, a copy of the current object(s) can be pushed down to the client in JSON format. Say a webpart renders information about a person, another webpart shows related information which is retrieved dynamically (like web services). Instead of getting the current person from the database in the second webpart again, we can reuse the same person object from the first webpart. To do so we must provide a DataContract for the Person class:

[DataContract]
public class Person
{
	[DataMember]
	public string Firstname { get; set; }
	[DataMember]
	public string Lastname { get; set; }
	[DataMember]
	public string PhoneMobile { get; set; }
	...

Then we can serialize the current object using DataContractJsonSerializer:

private void RegisterPersonOnClient(Person person)
{
	var serializer =
		new System.Runtime.Serialization.Json
			.DataContractJsonSerializer(person.GetType());
	var ms = new MemoryStream();
	serializer.WriteObject(ms, person);
	var json = Encoding.UTF8.GetString(ms.ToArray());
	var script = "var personOnClient = " + json + ";\n";
	Page.ClientScript
		.RegisterStartupScript(GetType(), "uniqueScriptKey", script, true);
}

To be able to use these classes, add reference to System.Runtime.Serialization and System.ServiceModel.Web dlls. Don’t forget to append a semicolon and newline so that script doesn’t collide with other scripts.

On the client we get a copy of the person object:

Then this object can be used eg. for loading a profile from remote service

function openRemoteModalDialog() {
	if (typeof (personOnClient) !== undefined) {
		var p = {
			firstname: personOnClient.Firstname,
			lastname: personOnClient.Lastname,
			email: personOnClient.Email,
			mobile: personOnClient.PhoneMobile
		};
		var q = "?" + $.param(p);
		openModalDialog(remoteUrl + q);
	}
}
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Discovering SharePoint

And going crazy doing it

Bram de Jager talking Office 365, SharePoint and Azure

My view and thoughts on Productivity and more.

My programming life

and everything in between

SharePoint Development Lab by @avishnyakov

It is a good place to share some SharePoint stories and development practices.

SharePoint Dragons

Nikander & Margriet on SharePoint

RealActivity - Real-time and trustworthy

Blog site of founder, RealActivty - Paul J. Swider

Mai Omar Desouki - Avid SharePointer

Egyptian & Vodafoner - Senior SharePoint Consultant

Cameron Dwyer | Office 365, SharePoint, Outlook, OnePlace Solutions

Office 365, SharePoint, OnePlace Solutions & Life's Other Little Wonders

paul.tavares

Me and My doings!

Share SharePoint Points!!

By Mohit Vashishtha

Jimmy Janlén "Den Scrummande Konsulten"

Erfarenheter, synpunkter och raljerande om Scrum från Jimmy Janlén

SPJoel

SharePoint for everyone

SharePointRyan

Ryan Dennis is a SharePoint Solution Architect with a passion for SharePoint and PowerShell

SharePoint 2020

The Vision for a Future of Clarity

Aharoni in Unicode, ya mama

Treacle tarts for great justice

... And All That JS

JavaScript, Web Apps and SharePoint

blksthl

Mostly what I know about SharePoint - CommunicoCuspis

%d bloggers like this: