UpdatePanel control

The UpdatePanel control is probably the most important control in the ASP.NET AJAX package. It will AJAX'ify controls contained within it, allowing partial rendering of the area. We already used it in the Hello world example, and in this chapter, we will go in depth with more aspects of the control.

The <asp:UpdatePanel> tag has two childtags - the ContentTemplate and the Triggers tags. The ContentTemplate tag is required, since it holds the content of the panel. The content can be anything that you would normally put on your page, from literal text to web controls. The Triggers tag allows you to define certain triggers which will make the panel update it's content. The following example will show the use of both childtags.

1. AsyncPostBackTrigger

it is the one which enforces Asynchonous post back of the Page.., i.e. the AJAX way. The data will be transacted without full post back. When you are using functionalities like login, you may use this.

Ex. You are having two dropDowns Viz., Countries and States. the states should be loaded when a country is selected and it should be changed on Countries change.

You may use AsyncPostBackTrigger in this scinario., which will populate the states ddl without full post back.

2. PostBackTrigger

It is the one which does not follow the AJAX functioalities., but the full post back as usually(as Without using UpdatePanel). Situtions are there where you would not like to enforce Partial Post back (as explained in Point 1. above). Like you are having FileUpload Control withing the UpdatePanel and when you do it by AsyncPostBack, you will not get any values to the server. It requires Full PostBack. in such a case you should use this trigger.

thank you.

Have you ever wonder which country is the best to live for IT engineers?

Below a list of 10 best countries to live for software engineers.

10. Canada
I. Median annual pay for software engineer – $57500

II. Position in the world ranking of “Happiness Index – experienced well-being” - 2

III. Position in the ranking of  “Best for workers: Countries” – 11

9. New Zealand
I.Median annual pay for software engineer – $59600

II.Position in the world ranking of “Happiness Index” - 17

III.Position in the ranking of  “Best for workers: Countries” – 8

8. Sweden
I. Median annual pay for software engineer – $61400

II. Position in the world ranking of “Happiness Index” - 5

III. Position in the ranking of  “Best for workers: Countries” – 8

7. Germany
I. Median annual pay for software engineer – $63800

II. Position in the world ranking of “Happiness Index” - 27

III. Position in the ranking of  “Best for workers: Countries” – 20

6. Australia
I. Median annual pay for software engineer – $65900

II. Position in the world ranking of “Happiness Index” - 8

III. Position in the ranking of  “Best for workers: Countries” – 14

5. Israel
I. Median annual pay for software engineer – $70700

II. Position in the world ranking of “Happiness Index” - 10

III. Position in the ranking of  “Best for workers: Countries” – 10

4. Denmark
I. Median annual pay for software engineer – $71500

II. Position in the world ranking of “Happiness Index” - 1

III. Position in the ranking of  “Best for workers: Countries” – 4

3. United States
I. Median annual pay for software engineer – $76000

II. Position in the world ranking of “Happiness Index” - 16

III. Position in the ranking of  “Best for workers: Countries” – 7

2. Norway
I. Median annual pay for software engineer – $81400

II. Position in the world ranking of “Happiness Index” - 3

III.Position in the ranking of  “Best for workers: Countries” – 6

1. Switzerland
I. Median annual pay for software engineer – $104200

II. Position in the world ranking of “Happiness Index” - 6

III.Position in the ranking of  “Best for workers: Countries” – 24

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error: $Resources:core,ImportErrorMessage

Today i have faced an exception while importing webpart into a wiki page.

error: $Resources:core,ImportErrorMessage

we can overcome this issue.

Solution : Visual Studio -> Build -> Select 'Retract' -> Clean solution -> Build and deploy.

If it doesn't  solve this please check your connection string name is correct or not. it may cause the issue.


thank you.