After click button the page content are gone (invisible)

I've a page and I've postpack control in my cs file. For example in post.aspx page users can comment. They give name, email, url and 开发者_运维问答comment and then click send button. After click send button page content are gone. Why is this happened?

Again I have a postback control in page_load like

if(!page.ispostback)

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Probably you're creating dynamic controls (programmatically appended to the page) and you don't recreate them on postback.

More details about what you're doing would help though.

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As Claudio Redi mentions, you're properly setting the content of the label and the div, inside

if (!Page.IsPostBack)

This means, that the code will not be run, if a button is clicked. This will only run, the first time you're visiting the website.